NZ708603B2 - Processing Biomass - Google Patents
Processing Biomass Download PDFInfo
- Publication number
- NZ708603B2 NZ708603B2 NZ708603A NZ70860312A NZ708603B2 NZ 708603 B2 NZ708603 B2 NZ 708603B2 NZ 708603 A NZ708603 A NZ 708603A NZ 70860312 A NZ70860312 A NZ 70860312A NZ 708603 B2 NZ708603 B2 NZ 708603B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- feedstock
- ions
- ion beam
- irradiation
- plant
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/003—Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/22—Processes using, or culture media containing, cellulose or hydrolysates thereof
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/02—Monosaccharides
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P21/00—Preparation of peptides or proteins
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P2201/00—Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
- C12P7/10—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate substrate containing cellulosic material
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
- C12P7/56—Lactic acid
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/64—Fats; Fatty oils; Ester-type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
Disclosed is a method of making a product comprising: providing a saccharified feedstock obtained at least in part from a plant that has been modified with respect to a wild type variety of the plant, the feedstock having been exposed to irradiation from an ion beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad; and contacting the saccharified feedstock with a microorganism to ferment the saccharified feedstock, the feedstock having an improved nutrient mix for the microorganism relative to the wild type variety, wherein the improved nutrient mix enhances fermentation of the saccharified feedstock by the microorganism. ing from about 5 Mrad to about 50 Mrad; and contacting the saccharified feedstock with a microorganism to ferment the saccharified feedstock, the feedstock having an improved nutrient mix for the microorganism relative to the wild type variety, wherein the improved nutrient mix enhances fermentation of the saccharified feedstock by the microorganism.
Description
PROCESSING BIOMASS
RELATED APPLICATIONS
This application claims priority to U.S. Provisional Application Serial No.
61/442,781, filed February 14, 2011. The complete disclosure of this
provisional ation is hereby incorporated by reference herein.
BACKGROUND
osic and ellulosic materials are produced, processed, and used in
large quantities in a number of applications. Often such materials are used
once, and then discarded as waste, or are simply considered to be waste
materials, e.g., bagasse, sawdust, and stover. In some cases, cellulosic and
lignocellulosic materials are obtained by g and harvesting plants.
SUMMARY
Generally, this invention relates to using and/or processing feedstock materials
e.g., cellulosic and/or lignocellulosic feedstock materials, including plants that
have been modified with respect to their wild types, e.g., genetically modified
plants, and to intermediates and products made therefrom. Many of the
methods described herein provide materials that can be more readily utilized by
a variety of microorganisms to produce useful intermediates and products, e.g.,
energy, a fuel, a food or a material.
In one aspect, the invention features methods for making ts that include
ally treating a cellulosic, lignocellulosic and/or starchy feedstock
ed at least in part from a plant that has been modified with respect to a
wild type variety of the plant e.g., the plant has been genetically modified. In
some embodiments the entire plant can be used. In certain embodiments, a
portion of the plant is utilized.
In another aspect, the invention features a method of making a t
comprising: providing a saccharified feedstock obtained at least in part from a
plant that has been modified with respect to a wild type variety of the plant, the
feedstock having been exposed to irradiation from an ion beam, the total dose
of irradiation being from about 5 Mrad to about 50 Mrad; and contacting the
saccharified feedstock with a microorganism to t the saccharified
ock, the feedstock having an improved nutrient mix for the
microorganism relative to the wild type variety, wherein the improved nutrient
mix enhances fermentation of the saccharified feedstock by the microorganism.
Some implementations include one or more of the following es. The
feedstock may include a plant that has recombinant DNA and/or recombinant
genes. The modified plant may express one or more recombinant materials, for
example, a protein, a polymer and/or a macromolecule. The method may
further include ing from the feedstock materials such as pharmaceuticals,
nutriceuticals, ns, fats, vitamins, oils,
fiber, minerals, sugars, ydrates and alcohols. The feedstock can include a crop
e e.g., corn cobs and/or corn stover, wheat straw, or the ock can be a
genetically modified corn, wheat or soybean plant. The method may filrther include
treating the feedstock with an organism and/or enzyme, in some cases producing a sugar
e. g., in the form of a solution or suspension. Optionally the sugar can be fermented. The
physical treatment can include irradiation of the feedstock. In some entations, the
irradiated feedstock may be utilized as an edible material, e.g., as an animal feed. If
desired, an enzyme such as a cellulase can be added to the edible material, e.g., to
increase the nutrient value release.
1O Irradiating may in some cases be performed using one or more electron beam
deVices. In some cases, irradiating comprises ng a total dose of from about 5 Mrad
to about 50 Mrad of radiation to the feedstock. Irradiation can sterilize the material prior
to further processing and or e prior to use. In preferred implementations, irradiating
reduces the recalcitrance of the ock.
The plant may have been d, for example, with a modification including
enhancement of resistance to insects, fungal diseases, and other pests and disease-causing
agents; increased tolerance to herbicides; increased drought resistance; extended
temperature range; enhanced tolerance to poor soil; enhanced stability or shelf-life;
greater yield; larger fruit size; stronger stalks; enhanced shatter resistance; reduced time
to crop maturity; more uniform germination times; higher or modified starch production;
enhanced nutrient production, such as enhanced, steroid, sterol, hormone, fatty acid,
glycerol, polyhydroxyalkanoate, amino acid, Vitamin and/or protein production; modified
lignin content; ed cellulose, hemicellulose and/or lignin ation; including of
a phenotype marker to allow qualitative detection; reduced recalcitrance and enhanced
phytate metabolism. The plant may be, for example, a genetically modified alfalfa,
potato, beet, corn, wheat, cotton, rapeseed, rice, or sugarcane plant. The feedstock may
e a crop residue from a modified plant, for example the ock may include corn
cobs and/or corn . The plant may be, for example, a cally modified corn or
soybean plant, or any of the many genetically modified plants that are grown.
In another aspect, the invention features a product comprising sugar derived from a
feedstock obtained at least in part from a plant that has been modified with respect to
a wild type variety of the plant, for example the plant has been genetically modified.
In a further aspect, the invention es a product comprising an irradiated cellulosic
or lignocellulosic feedstock obtained at least in part from a plant that has been
modified with respect to a wild type variety of the plant. The product may further
include a microorganism and/or an enzyme, and in some cases a liquid medium. In yet
a further , the invention features a product comprising sugar produced from a
saccharified feedstock obtained at least in part from a plant that has been modified
with respect to a wild type variety of the plant, the feedstock having been exposed to
irradiation from an ion beam, the total dose of irradiation being from about 5 Mrad to
about 50 Mrad, and contacted with a microorganism to ferment the rified
feedstock; and the ock having an improved nutrient mix for the rganism
relative to the wild type variety, the improved nutrient mix being effective to e
fermentation of the irradiated feedstock by the microorganism.
In another aspect, the invention features a product comprising an irradiated ock
obtained at least in part from a plant that has been modified with respect to a wild type
y of the plant, the feedstock having been exposed to irradiation from an ion
beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad; and the
feedstock having an improved nutrient mix for a microorganism relative to the wild
type variety, the improved nutrient mix being effective to enhance fermentation of the
irradiated feedstock by the microorganism.
In another , the invention features a product comprising a saccharified cellulosic
or lignocellulosic feedstock obtained at least in part from a plant that has been
modified with respect to a wild type variety of the plant, the feedstock having been
exposed to irradiation from an ion beam, the total dose of irradiation being from about
Mrad to about 50 Mrad; and the feedstock having an improved nutrient mix for a
microorganism relative to the wild type variety, the improved nutrient mix being
ive to enhance fermentation of the saccharified feedstock by the microorganism.
Without being bound by any , it is believed that the use of ed plants can
be advantageous over the non-modified wild type. For example, an enhancement of
resistance to insects, fungal diseases, and other pests and disease-causing agents; an
sed tolerance to ides; increased t resistance; an extended
temperature range; enhanced tolerance to poor soil; a larger fruit size; er stalks;
enhanced shatter resistance; reduced time to crop maturity; more uniform germination
times; can e higher yields and a more varied feedstock source, both of which
can lower the s feedstock cost. In another example, enhanced stability or shelflife
can be advantageous to biomass inventory quality. As another example, enhanced
nutrient production, such as enhanced steroid, sterol, hormone, fatty acid, glycerol,
polyhydroxyalkanoate, amino acid, vitamin and/or protein production can provide
products or intermediates with higher nutrient quality that may improve a process e.g.,
a fermentation, or a product, e.g., an animal feed. Furthermore, for example, higher or
modified starch production, ed lignin content; and/or ed cellulose,
hemicellulose and/or lignin degradation can reduce the recalcitrance of the feedstock
making it easier to process.
The term "plant," as used herein, refers to any of various photosynthetic, eukaryotic,
multicellular organisms of the kingdom Plantae, including but not limited to
agricultural crops, trees, grasses, and algae.
"Structurally modifying" a feedstock, as that phrase is used herein, means changing
the molecular ure of the feedstock in any way, including the chemical bonding
arrangement, crystalline structure, or conformation of the feedstock. The change may
be, for e, a change in the integrity of the crystalline structure, e.g., by
microfracturing within the structure, which may not be reflected by diffractive
measurements of the crystallinity of the material. Such changes in the ural
integrity of the material can be measured ctly by measuring the yield of a
product at ent levels of structure -modifying treatment. In addition, or
alternatively, the change in the molecular structure can include changing the
supramolecular structure of the material, oxidation of the material, changing an
e molecular weight, changing an average crystallinity, ng a surface area,
changing a degree of polymerization, changing a porosity, changing a degree of
branching, grafting on other materials, ng a crystalline domain size, or
changing an overall domain size.
Unless otherwise defined, all technical and scientific terms used herein have the same
meaning as commonly understood by one of ordinary skill in the art to which this
invention belongs. Although methods and materials similar or equivalent to those
described herein can be used in the practice or testing of the present invention,
le methods and materials are described below. All publications, patents
applications, patents and other references mentioned herein are incorporated by
reference in their entirety. The materials, methods, and examples are illustrative only
and not intended to be limiting.
Throughout the ication and claims, unless the context requires otherwise, the
word “comprise” or variations such as ises” or “comprising”, will be
understood to imply the inclusion of a stated integer or group of rs but not the
exclusion of any other integer or group of integers.
Other features and ages will be apparent from the following detailed
description, and from the claims.
DESCRIPTION OF GS
is a block diagram illustrating conversion of a feedstock into products and co-
products.
is a block diagram illustrating treatment of the ock and the use of the
treated feedstock in a fermentation process.
DETAILED DESCRIPTION
Feedstocks that are obtained from plants that have been ed with respect to a
wild type variety, e.g., by genetic modification or other types of modification, can be
processed to produce useful intermediates and products such as those described
herein. Systems and processes are described herein that can use as feedstock materials
e.g., osic and/or lignocellulosic materials that are readily available, but can be
difficult to process by processes such as fermentation. Many of the processes
described herein can
effectively lower the recalcitrance level of the feedstock, making it easier to process, such
as by bioprocessing (e. g., with any microorganism described herein, such as a
homoacetogen or a heteroacetogen, and/or any enzyme bed herein), thermal
processing (e.g., gasif1cation or pyrolysis) or chemical methods (e.g., acid hydrolysis or
oxidation). The feedstock can be treated or processed using one or more of any of the
methods bed herein, such as mechanical ent, chemical treatment, radiation,
sonication, oxidation, pyrolysis or steam ion. The various treatment systems and
methods can be used in ations of two, three, or even four or more of these
logies or others described herein and elsewhere.
1O In addition to ng the recalcitrance, the methods outlined above can also
sterilize lignocellulosic or cellulosic feedstocks. This can be advantageous because
feedstocks can be infected with, for example, a bacteria, a yeast, an insect and/or a
fiJngus, that may have a deleterious effect on fiarther processes and/or prematurely
degrade the materials.
Feedstock materials, such as cellulosic and lignocellulosic feedstock materials,
can be obtained from plants that have been modified with t to a wild type variety.
Such modifications may be for example, by any of the methods described in any patent or
patent application referenced . As another e, plants may be modified
through the iterative steps of selection and breeding to obtain desired traits in a plant.
Furthermore, the plants can have had genetic material removed, modified, silenced and/or
added with respect to the wild type variety. For example, genetically modified plants can
be produced by recombinant DNA methods, where genetic modif1cations include
ucing or modifying specific genes from parental varieties, or, for example, by using
transgenic breeding n a specific gene or genes are introduced to a plant from a
different species of plant and/or ia. Another way to create genetic variation is
through mutation breeding wherein new alleles are artificially created from endogeneous
genes. The artificial genes can be d by a variety of ways including treating the plant
or seeds with, for example, chemical mutagens (e. g., using alkylating agents, epoxides,
alkaloids, peroxides, formaldehyde), irradiation (e. g., X-rays, gamma rays, neutrons, beta
particles, alpha particles, protons, deuterons, UV radiation) and temperature ng or
other external stressing and subsequent selection techniques. Other methods of providing
2012/025023
d genes is through error prone PCR and DNA ng followed by insertion of
the desired modified DNA into the desired plant or seed. Methods of introducing the
d genetic variation in the seed or plant include, for e, the use of a bacterial
carrier, biolistics, calcium phosphate precipitation, electroporation, gene splicing, gene
silencing, lipofection, microinjection and viral carriers.
Feedstock can be derived from a plant including, but not limited to canola,
crambe, coconut, maize, mustard, castor bean, sesame, cottonseed, linseed, soybean,
Arabidopsis phaseolus, peanut, alfalfa, wheat, rice, oat, sorghum, rapeseed, rye,
deum, millet, fescue, rye grass, sugarcane, cranberry, papaya, banana, safflower, oil
1O palms, flax, muskmelon, apple, er, dendrobium, lus, Chrysanthemum,
liliaceae, cotton, eucalyptus, sunflower, Brassica campestris, Brassica napus, turfgrass,
switch grass, cord grass, sugarbeet, coffee, dioscorea, acacia, apricot, artichoke, arugula,
asparagus, avocado, barley, beans, beet, blackberry, blueberry, broccoli, brussels sprouts,
cabbage, cantaloupe, carrot, cassava, cauliflower, celery, cherry, cilantro, clementine,
corn, cotton, Douglas fir, bamboo, seaweed, algae, eggplant, endive, escarole, fennel,
figs, forest tree, gourd, grape, ruit, honey dew, , kiwifruit, lettuce, leeks,
lemon, lime, loblolly pine, mango, melon, mushroom, nut, oat, okra, onion, orange,
parsley, pea, peach, pear, pepper, mon, pine, pineapple, plantain, plum,
pomegranate, poplar, potato, oryza sativa, pumpkin, quince, radiata pine, radicchio,
radish, rry, rye, southern pine, n, spinach, squash, strawberry, sweet potato,
sweetgum, tangerine, tea, tobacco, tomato, watermelon, wheat, yams, zucchini or
mixtures of these. Preferably the feedstock material is derived from plant material not
suitable for human consumption such as wood, agricultural waste, grasses such as
switchgrass or miscanthus, rice hulls, bagasse, cotton, jute, hemp, flax, bamboo, sisal,
abaca, straw, corn cobs, corn stover, hay, coconut hair, d, algae or mixtures of
these.
The advantages of plant modification include, for example, an enhancement of
resistance to insects, fungal es, and other pests and disease-causing agents; an
increased tolerance to herbicides; sed drought resistance; an extended temperature
range; enhanced tolerance to poor soil; enhanced stability or life; a greater yield;
larger fruit size; stronger stalks; enhanced r resistance; reduced time to crop
maturity; more uniform ation times; higher or modified starch production;
enhanced nutrient production, such as enhanced steroid, sterol, hormone, fatty acid,
glycerol, polyhydroxyalkanoate, amino acid, vitamin and/or protein production; modified
lignin content; enhanced cellulose, hemicellulose and/or lignin degradation; inclusion of
a phenotype marker to allow qualitative detection (e.g., seed coat color); and modified
phytate content. Any feedstock materials derived from these modified plants can also
benefit from these many advantages. For example, a feedstock al such as a
lignocellulosic material can have better shelf life, be easier to process, have a better land-
to-energy conversion ratio, and/or have a better nutritional value to any microbes that are
1O used in processing of the lignocellulosic material. In addition, any feedstock material
d from such plants can be less expensive and/or more plentiful. In some cases,
modified plants can be grown in a r variety of climates and/or soil types, for
example in marginal or depleted soils.
Feedstock als can be obtained from d plants having an increased
resistance to disease. For e, es which have d symptoms from the
infestation of fungal pathogen Phytophthora infestans are discussed in US. Patent No.
7,122,719. A possible advantage of such resistance is that the yield, quality and shelf life
of the feedstock materials may be improved.
Feedstock materials can be obtained from d plants with sed
resistance to parasites, for example, by encoding genes for the production of S-endotoxins
as exemplified in US. Patent No. 6,023,013. A possible advantage of such resistance is
that the yield, y and shelf life of the feedstock materials may be improved.
Feedstock materials can be obtained from modified plants having an increased
resistance to herbicides. For example, the alfalfa plant J-101, as described in US. Patent
No. 7,566,817, has an sed resistance to glyphosphate herbicides. As a further
example, modified plants described in US. Patent No. 6,107,549 have an increased
resistance to pyridine family herbicides. Furthermore, modified plants described in US.
Patent No. 7,498,429 have increased resistance to imidazolinones. A possible advantage
of such ance is that the yield and quality of the feedstock materials may be
improved.
Feedstock materials can be obtained from modified plants having an sed
stress resistance (for e, water deficit, cold, heat, salt, pest, e, or nutrient
stress). For example, such plants have been described in US. Patent No. 7,674,952. A
possible advantage of such resistance is that the yield and quality of the feedstock
materials may be improved. Moreover, such plants may be grown in adverse conditions,
e. g., al or depleted soil or in a harsh climate.
Feedstock materials can be obtained from modified plants with improved
characteristics such as larger fruits. Such plants have been described in US. Patent No.
7,335,812. A possible advantage of such resistance is that the yield and quality of the
1O feedstock materials may be improved.
Feedstock als can be obtained from modified plants with improved
characteristics such reduced pod shatter. Such plants have been described in US. Patent
No. 7,659,448. A possible age of such resistance is that the yield and quality of the
feedstock als may be improved.
Feedstock materials can be obtained from modified plants having enhanced or
d starch content. Such plants have been described in US. Patent No. 178. A
possible advantage of such modification is that the quality of the feedstock is improved.
Feedstock materials can be obtained from modified plants with a modified oil,
fatty acid or glycol production. Such plants have been bed in US. Patent No.
7,405,344. Fatty acids and oils are excellent substrates for microbial -yielding
metabolism and may provide an advantage to downstream processing of the feedstock
for, for example, fuel production. Fatty acids and oil ion may also be advantageous
in changing the viscosity and solubility of various components during downstream
processing of the feedstock. The spent feedstock may have a better nutrient mix for use as
animal feed or have higher calorie content useful as a direct filel for burning.
Feedstock materials can be obtained from modified plants with a modified steroid,
sterol and hormone content. Such plants have been described in US. Patent No.
6,822,142. A possible advantage is that this may provide a better nutrient mix for
microorganisms used in sing of the feedstock. After processing, the spent
feedstock may have a better nutrient mix for use as animal feed.
Feedstock materials can be obtained from modified plants with
polyhydroxyalkanoate producing ability. Such plants have been described in US. Patent
No. 6,175,061. Polyhydroxyalkanoates are a useful energy and carbon reserve for various
microorganisms and may be beneficial to the microorganisms used in downstream
ock processing. Also, since polyhydroxyalkanoate is biodegradable, it may impart
advantages by possibly reducing itrance in plant material after an aging period of
the stored feedstock. Further downstream, the spent feedstock may have a better nutrient
mix for use as animal feed or have higher calorie content useful as a direct fuel for
burning.
1O Feedstock materials can be obtained from modified plants with enhanced amino
acid production. Such plants have been described in US. Patent No. 7,615,621. A
possible advantage is that this may provide a better nutrient mix for rganisms used
in processing of the feedstock. After processing, the spent feedstock may have a better
nt mix for use as animal feed.
Feedstock materials can be obtained from modified plants with elevated synthesis
of vitamins. Such plants have been described in US. Patent No. 6,841,717. A possible
advantage is that this may provide a better nutrient mix for microorganisms used in
processing of the feedstock. After processing, the spent feedstock may have a better
nutrient mix for use as animal feed.
Feedstock materials can be obtained from ed plants that degrade lignin and
cellulose in the plant after harvest. Such plants have been described in US. Patent No.
7,049,485. Feedstock materials can also be obtained from modified plants with modified
lignin content. Such plants have been described in US. Patent No. 7,799,906. A possible
advantage of such plants is reduced recalcitrance relative to the wild types of the same
plants.
Feedstock materials can be ed from modified plants with a modified
phenotype for easy qualitative ion. Such plants have been bed in US. Patent
No. 7,402,731. A possible advantage is ease of ng crops and seeds for different
t streams such as biofuels, building materials and animal feed.
Feedstock materials can be obtained from modified plants with a d amount
of e. Such plants have been described in US. Patent No. 7,714,187. A possible
age is that this may provide a better nutrient mix for microorganisms used in
sing of the feedstock. After processing, the spent feedstock may have a better
nutrient mix for use as animal feed.
Modified plants and/or plant materials and methods for making such
modifications have been described in the US. Patents and US. hed applications
listed at the end of this nt (immediately before the claims), the entire disclosure of
each of which is hereby incorporated by reference herein in its entirety.
SYSTEMS FOR TREATING A FEEDSTOCK
1O shows one ular process for converting a feedstock, particularly a
feedstock obtained at least in part from a modified plant material, into useful intermediates
and products. s 10 includes initially mechanically treating the feedstock (12), e. g., to
reduce the size of the feedstock 110. The mechanically treated feedstock is then treated with
a physical treatment (14) to modify its structure, for example by weakening or
microfiacturing bonds in the crystalline structure of the material. Next, the structurally
modified material may in some cases be subjected to further mechanical treatment (1 6).
This mechanical treatment can be the same as or different fiom the initial mechanical
treatment. For example, the l treatment can be a size reduction (e. g., cutting) step
followed by a shearing step, while the r treatment can be a grinding or milling step.
The al can then be subjected to filrther structure-modifying treatment and
mechanical treatment, if further structural change (e. g., reduction in recalcitrance) is desired
prior to fiarther processing.
Next, the treated material can be processed with a primary processing step 18, e.g.,
saccharification and/or tation, to e intermediates and products (e.g., energy,
fiJel, foods and materials). In some cases, the output ofthe primary processing step is
directly useful but, in other cases, requires further processing provided by a post-processing
step (20). For example, in the case of an alcohol, post-processing may involve distillation
and, in some cases, denaturation.
As described herein, many variations ofprocess 10 can be utilized.
shows one particular system that es the steps described above for
treating a feedstock and then using the treated feedstock in a fermentation process to
produce an alcohol. System 100 includes a module 102 in which a feedstock is lly
ically treated (step 12, above), a module 104 in which the mechanically treated
feedstock is structurally modified (step 14, above), e. g., by irradiation, and a module 106 in
which the structurally modified feedstock is subjected to fiarther mechanical ent (step
16, above). As discussed above, the module 106 may be of the same type as the module
102, or a different type. In some entations the structurally modified feedstock can be
returned to module 102 for filrther mechanical treatment rather than being filrther
1O mechanically treated in a separate module 106.
As described herein, many variations of system 100 can be utilized.
After these treatments, which may be repeated as many times as required to obtain
desired feedstock properties, the treated ock is delivered to a fermentation system 108.
Mixing may be performed during fermentation, in which case the mixing is preferably
relatively gentle (low shear) so as to minimize damage to shear sensitive ingredients such as
enzymes and other microorganisms. In some embodiments, jet mixing is used, as described
in US. Serial No. 12/782,694, ,977 and 13/293,985, the complete disclosures of
which are orated herein by reference.
Referring again to fermentation produces a crude ethanol mixture, which
flows into a g tank 110. Water or other solvent, and other non-ethanol ents,
are stripped from the crude ethanol mixture using a stripping column 112, and the ethanol is
then distilled using a distillation unit 114, e. g., a rectifier. Distillation may be by vacuum
distillation. Finally, the ethanol can be dried using a molecular sieve 116 and/or red,
if necessary, and output to a desired shipping method.
In some cases, the systems described herein, or ents thereof, may be
portable, so that the system can be transported (e.g., by rail, truck, or marine vessel) from
one location to another. The method steps described herein can be performed at one or
more locations, and in some cases one or more of the steps can be performed in t.
Such mobile processing is described in US. Serial No. 12/374,549 and International
Application No. , the full disclosures of which are incorporated herein
by reference.
Any or all of the method steps described herein can be performed at ambient
temperature. If desired, cooling and/or heating may be ed during certain steps.
For example, the feedstock may be cooled during mechanical treatment to increase its
brittleness. In some embodiments, g is employed before, during or after the initial
mechanical treatment and/or the subsequent mechanical treatment. Cooling may be
performed as described in US. Serial No. 12/502,629, now US. Patent No. 7,900,857 the
filll disclosure of which is incorporated herein by reference. er, the temperature
in the fermentation system 108 may be controlled to enhance saccharif1cation and/or
fermentation.
1O The individual steps of the methods bed above, as well as the materials used,
will now be described in fiarther detail.
AL TREATMENT
Physical treatment processes can include one or more of any of those described
herein, such as mechanical ent, chemical treatment, irradiation, sonication,
oxidation, pyrolysis or steam ion. ent methods can be used in combinations
of two, three, four, or even all of these technologies (in any . When more than one
treatment method is used, the methods can be applied at the same time or at different
times. Other processes that change a molecular structure of a feedstock may also be
used, alone or in combination with the processes disclosed herein.
Mechanical ents
In some cases, methods can include mechanically ng the feedstock.
Mechanical treatments include, for example, cutting, milling, ng, grinding, shearing
and chopping. Milling may include, for example, ball milling, hammer milling,
rotor/stator dry or wet milling, freezer milling, blade milling, knife milling, disk milling,
roller milling or other types of milling. Other ical treatments include, e.g., stone
grinding, cracking, mechanical ripping or tearing, pin grinding or air attrition milling.
Mechanical treatment can be advantageous for “opening up,3, “stressing,”
breaking and shattering osic or lignocellulosic materials in the feedstock, making
the cellulose of the materials more susceptible to chain scission and/or reduction of
crystallinity. The open materials can also be more susceptible to oxidation when
irradiated.
In some cases, the mechanical treatment may include an l preparation of the
feedstock as received, e.g., size ion of materials, such as by cutting, grinding,
ng, pulverizing or chopping. For example, in some cases, loose feedstock (e.g.,
recycled paper, starchy materials, or grass) is prepared by shearing or shredding.
Alternatively, or in on, the feedstock material can first be physically treated
by one or more of the other physical treatment methods, e.g., chemical treatment,
radiation, sonication, oxidation, pyrolysis or steam explosion, and then mechanically
1O treated. This sequence can be advantageous since als treated by one or more of the
other treatments, e.g., irradiation or pyrolysis, tend to be more e and, therefore, it
may be easier to r change the molecular structure of the material by mechanical
treatment.
In some embodiments, the feedstock is in the form of a fibrous material, and
mechanical treatment includes shearing to expose fibers of the fibrous material. Shearing
can be performed, for example, using a rotary knife cutter. Other methods of
ically treating the feedstock e, for example, milling or grinding. Milling
may be performed using, for example, a hammer mill, ball mill, colloid mill, conical or
cone mill, disk mill, edge mill, Wiley mill or grist mill. Grinding may be performed
using, for example, a stone grinder, pin grinder, coffee grinder, or burr grinder. Grinding
may be provided, for example, by a reciprocating pin or other element, as is the case in a
pin mill. Other mechanical treatment methods include mechanical ripping or tearing,
other methods that apply pressure to the material, and air attrition milling. le
mechanical treatments further include any other que that changes the molecular
structure of the feedstock.
If desired, the mechanically treated material can be passed through a screen, e. g.,
having an average opening size of 1.59 mm or less (1/16 inch, 0.0625 inch). In some
embodiments, shearing, or other mechanical treatment, and screening are performed
concurrently. For example, a rotary knife cutter can be used to concurrently shear and
screen the feedstock. The feedstock is d between stationary blades and rotating
blades to e a sheared material that passes through a screen, and is captured in a bin.
WO 12529
The feedstock can be mechanically treated in a dry state (e.g., having little or no
free water on its surface), a hydrated state (e.g., having up to ten percent by weight
ed water), or in a wet state, e.g., having between about 10 percent and about 75
percent by weight water. The fiber source can even be mechanically treated while
partially or fillly submerged under a liquid, such as water, ethanol or isopropanol.
The feedstock can also be ically treated under a gas (such as a stream or
here of gas other than air), e. g., oxygen or nitrogen, or steam.
If desired, lignin can be removed from any of the fibrous materials that include
lignin. Also, to aid in the breakdown of the materials that include ose, the material
1O can be treated prior to or during mechanical treatment or irradiation with heat, a chemical
(e. g., mineral acid, base or a strong oxidizer such as sodium hypochlorite) and/or an
. For example, grinding can be performed in the presence of an acid.
Mechanical treatment systems can be configured to produce streams with specific
morphology characteristics such as, for example, surface area, porosity, bulk density,
and, in the case of fibrous feedstocks, fiber characteristics such as length-to-width ratio.
In some embodiments, a BET surface area of the mechanically treated material is
greater than 0.1 m2/g, e.g., r than 0.25 m2/g, greater than 0.5 m2/g, greater than 1.0
m2/g, greater than 1.5 m2/g, greater than 1.75 m2/g, r than 5.0 m2/g, r than 10
m2/g, r than 25 m2/g, greater than 35 m2/g, greater than 50m2/g, greater than 60
m2/g, greater than 75 m2/g, greater than 100 m2/g, greater than 150 m2/g, greater than 200
m2/g, or even greater than 250 m2/g.
A porosity of the mechanically treated material can be, e. g., greater than 20
percent, greater than 25 percent, greater than 35 percent, greater than 50 percent, greater
than 60 t, greater than 70 percent, greater than 80 percent, greater than 85 percent,
greater than 90 percent, greater than 92 percent, greater than 94 percent, greater than 95
percent, greater than 97.5 percent, greater than 99 t, or even greater than 99.5
percent.
In some embodiments, after mechanical ent the material has a bulk density
of less than 0.75 g/cm3, e.g., less than about 0.7, 0.65, 0.60, 0.50, 0.35, 0.25, 0.20, 0.15,
0.10, 0.05, or less, e.g., less than 0.025 g/cm3 . Bulk density is determined using ASTM
D1895B. Briefly, the method involves filling a measuring cylinder of known volume
with a sample and obtaining a weight of the sample. The bulk density is calculated by
dividing the weight of the sample in grams by the known volume of the cylinder in cubic
centimeters.
If the feedstock is a fibrous material the fibers of the mechanically treated
material can have a relatively large average length-to-diameter ratio (e.g., greater than
-to-1), even if they have been sheared more than once. In addition, the fibers of the
fibrous materials bed herein may have a relatively narrow length and/or length-to-
diameter ratio distribution.
As used herein, average fiber widths (e.g., diameters) are those determined
1O optically by ly selecting approximately 5,000 fibers. Average fiber lengths are
corrected length-weighted lengths. BET (Brunauer, Emmet and Teller) surface areas are
point surface areas, and porosities are those ined by mercury porosimetry.
If the feedstock is a fibrous material the average length-to-diameter ratio of fibers
of the mechanically treated material can be, e. g., greater than 8/1, e. g., r than 10/1,
greater than 15/1, r than 20/ 1, greater than 25/1, or greater than 50/1. An average
fiber length of the mechanically treated material can be, e.g., between about 0.5 mm and
2.5 mm, e. g., between about 0.75 mm and 1.0 mm, and an average width (e. g., diameter)
of the second fibrous material 14 can be, e.g., between about 5 um and 50 um, e. g.,
between about 10 um and 30 um.
In some embodiments, if the feedstock is a fibrous material the standard deviation
of the fiber length of the mechanically treated material can be less than 60 percent of an
average fiber length of the mechanically treated material, e. g., less than 50 percent of the
e length, less than 40 percent of the average length, less than 25 t of the
average length, less than 10 percent of the average length, less than 5 percent of the
average length, or even less than 1 percent of the average length.
In some situations, it can be desirable to prepare a low bulk density material,
densify the material (e.g., to make it easier and less costly to transport to another site),
and then revert the material to a lower bulk density state. ed materials can be
sed by any of the methods described herein, or any material processed by any of
the methods described herein can be subsequently densified, e. g., as disclosed in US.
Serial No. 12/429, 045 now US. Patent No. 7,932,065 and WO 73186, the full
disclosures of which are incorporated herein by reference.
Radiation Treatment
One or more radiation processing sequences can be used to process the feedstock,
and to provide a structurally modified material which fianctions as input to further
processing steps and/or sequences. Irradiation can, for example, reduce the lar
weight and/or crystallinity of ock. Radiation can also sterilize the materials, or any
media needed to bioprocess the al.
In some embodiments, energy deposited in a material that releases an electron
1O from its atomic orbital is used to irradiate the materials. The radiation may be ed
by (1) heavy charged particles, such as alpha particles or protons, (2) electrons, produced,
for example, in beta decay or electron beam accelerators, or (3) electromagnetic
ion, for example, gamma rays, x rays, or ultraviolet rays. In one approach, ion
produced by radioactive substances can be used to irradiate the feedstock. In another
approach, electromagnetic radiation (e.g., produced using electron beam emitters) can be
used to irradiate the feedstock. In some ments, any combination in any order or
concurrently of (1) through (3) may be ed. The doses applied depend on the desired
effect and the particular ock.
In some instances when chain scission is desirable and/or polymer chain
onalization is desirable, particles heavier than electrons, such as protons, helium
nuclei, argon ions, silicon ions, neon ions, carbon ions, phosphorus ions, oxygen ions or
nitrogen ions can be utilized. When ring-opening chain scission is desired, positively
charged particles can be utilized for their Lewis acid properties for enhanced ring-
opening chain scission. For example, when maximum oxidation is desired, oxygen ions
can be utilized, and when maximum nitration is desired, nitrogen ions can be utilized.
The use of heavy particles and positively charged particles is described in US. Serial No.
l2/4l7,699, now US. Patent No. 784, the full disclosure of which is incorporated
herein by reference.
In one method, a first material that is or es cellulose having a first number
average molecular weight (MM) is irradiated, e.g., by treatment with ionizing radiation
(e.g., in the form of gamma radiation, X-ray radiation, 100 nm to 280 nm ultraviolet (UV)
light, a beam of electrons or other charged particles) to provide a second material that
includes cellulose having a second number average molecular weight (MNZ) lower than
the first number average molecular weight. The second material (or the first and second
material) can be combined with a microorganism (with or without enzyme treatment) that
can utilize the second and/or first al or its tuent sugars or lignin to produce an
intermediate or product, such as those described herein.
Since the second material includes cellulose having a reduced molecular weight
ve to the first al, and in some instances, a reduced crystallinity as well, the
1O second material is generally more dispersible, swellable and/or soluble, e.g., in a solution
containing a rganism and/or an enzyme. These properties make the second
material easier to process and more susceptible to chemical, enzymatic and/or biological
attack relative to the first material, which can greatly improve the production rate and/or
tion level of a desired product, e.g., ethanol.
In some embodiments, the second number average lar weight (MNZ) is
lower than the first number average lar weight (MNl) by more than about 10
percent, e.g., more than about 15, 20, 25, 30, 35, 40, 50 percent, 60 percent, or even more
than about 75 percent.
In some instances, the second material includes cellulose that has a crystallinity
(C2) that is lower than the crystallinity (C1) of the cellulose of the first material. For
example, (C2) can be lower than (C1) by more than about 10 percent, e.g., more than
about 15, 20, 25, 30, 35, 40, or even more than about 50 percent.
In some embodiments, the starting crystallinity index (prior to irradiation) is from
about 40 to about 87.5 percent, e.g., from about 50 to about 75 percent or from about 60
to about 70 percent, and the crystallinity index after irradiation is from about 10 to about
50 percent, e. g., from about 15 to about 45 percent or from about 20 to about 40 percent.
r, in some embodiments, e.g., after extensive irradiation, it is possible to have a
crystallinity index of lower than 5 percent. In some embodiments, the al after
irradiation is substantially amorphous.
In some embodiments, the ng number average molecular weight (prior to
irradiation) is from about 200,000 to about 3,200,000, e.g., from about 250,000 to about
1,000,000 or from about 250,000 to about 700,000, and the number average molecular
weight after irradiation is from about 50,000 to about 200,000, e.g., from about 60,000 to
about 150,000 or from about 70,000 to about 125,000. However, in some embodiments,
e. g., after extensive irradiation, it is possible to have a number average molecular weight
of less than about 10,000 or even less than about 5,000.
In some embodiments, the second material can have a level of oxidation (02) that
is higher than the level of oxidation (01) of the first material. A higher level of oxidation
of the material can aid in its sability, swellability and/or solubility, further
ing the material’s susceptibility to chemical, tic or biological attack. In
1O some embodiments, to increase the level of the ion of the second material relative
to the first material, the irradiation is performed under an ing environment, e.g.,
under a blanket of air or oxygen, producing a second material that is more oxidized than
the first material. For example, the second material can have more hydroxyl groups,
aldehyde groups, ketone groups, ester groups or carboxylic acid groups, which can
increase its hilicity.
Ionizing Radiation
Each form of radiation ionizes the carbon-containing material via particular
interactions, as determined by the energy of the radiation. Heavy charged particles
primarily ionize matter via b scattering; fiarthermore, these interactions produce
energetic electrons that may further ionize matter. Alpha particles are identical to the
nucleus of a helium atom and are produced by the alpha decay of various radioactive
nuclei, such as isotopes of bismuth, polonium, ne, radon, francium, radium, l
actinides, such as actinium, thorium, uranium, neptunium, curium, califomium,
americium, and plutonium.
When particles are utilized, they can be neutral (uncharged), positively charged or
negatively charged. When charged, the d particles can bear a single ve or
negative charge, or multiple charges, e.g., one, two, three or even four or more charges.
In instances in which chain scission is desired, positively charged les may be
desirable, in part due to their acidic nature. When particles are utilized, the particles can
have the mass of a resting on, or greater, e.g., 500, 1000, 1500, 2000, 10,000 or
even 100,000 times the mass of a resting electron. For example, the particles can have a
mass of from about 1 atomic unit to about 150 atomic units, e. g., from about 1 atomic
unit to about 50 atomic units, or from about 1 to about 25, e.g., 1, 2, 3, 4, 5, 10, 12 or 15
amu. rators used to rate the particles can be electrostatic DC,
electrodynamic DC, RF linear, magnetic induction linear or continuous wave. For
example, cyclotron type accelerators are available from IBA, Belgium, such as the
Rhodotron® system, while DC type accelerators are available from RDI, now IBA
Industrial, such as the tron®. Ions and ion accelerators are discussed in
Introductory Nuclear Physics, h S. Krane, John Wiley & Sons, Inc. (1988), Krsto
1O Prelec, FIZIKA B 6 (1997) 4, 177—206, Chu, William T., “Overview of Light-Ion Beam
Therapy” Columbus-Ohio, ICRU-IAEA Meeting, 18-20 March 2006, Iwata, Y. et al.,
"Altemating-Phase-Focused IH-DTL for Heavy-Ion Medical Accelerators” Proceedings
of EPAC 2006, Edinburgh, Scotland and , C.M. et al., “Status of the
onducting ECR Ion Source Venus” Proceedings of EPAC 2000, Vienna, Austria.
Gamma radiation has the advantage of a significant penetration depth into a
variety of materials. Sources of gamma rays include radioactive nuclei, such as isotopes
of cobalt, m, technicium, chromium, gallium, indium, iodine, iron, krypton,
samarium, selenium, sodium, thalium, and xenon.
Sources of x rays include electron beam collision with metal targets, such as
tungsten or molybdenum or alloys, or compact light sources, such as those produced
commercially by Lyncean.
Sources for ultraviolet radiation e deuterium or cadmium lamps.
Sources for infrared radiation include sapphire, zinc, or selenide window ceramic
lamps.
Sources for microwaves e klystrons, Slevin type RF sources, or atom beam
sources that employ hydrogen, oxygen, or nitrogen gases.
In some ments, a beam of electrons is used as the radiation source. A
beam of electrons has the advantages of high dose rates (e. g., 1, 5, or even 10 Mrad per
second), high throughput, less containment, and less confinement equipment. Electrons
can also be more efficient at g chain scission. In addition, electrons having
energies of 4-10 MeV can have a penetration depth of 5 to 30 mm or more, such as 40
Electron beams can be generated, e.g., by ostatic generators, cascade
tors, transformer generators, low energy rators with a ng system, low
energy accelerators with a linear e, linear accelerators, and pulsed accelerators.
ons as an ionizing radiation source can be useful, e.g., for relatively thin sections of
material, e.g., less than 0.5 inch, e.g., less than 0.4 inch, 0.3 inch, 0.2 inch, or less than
0.1 inch. In some embodiments, the energy of each electron of the electron beam is from
about 0.3 MeV to about 2.0 MeV (million electron volts), e.g., from about 0.5 MeV to
1O about 1.5 MeV, or from about 0.7 MeV to about 1.25 MeV.
Electron beam irradiation devices may be procured cially from Ion Beam
Applications, n-la-Neuve, Belgium or the Titan Corporation, San Diego, CA.
Typical electron energies can be 1 MeV, 2 MeV, 4.5 MeV, 7.5 MeV, or 10 MeV.
Typical electron beam irradiation device power can be 1 kW, 5 kW, 10 kW, 20 kW, 50
kW, 100 kW, 250 kW, or 500 kW. The level of depolymerization of the feedstock
depends on the electron energy used and the dose applied, while exposure time depends
on the power and dose. l doses may take values of 1 kGy, 5 kGy, 10 kGy, 20 kGy,
50 kGy, 100 kGy, or 200 kGy. In a some embodiments energies between 0.25-10 MeV
(e.g., 0.5-0.8 MeV, 0.5-5 MeV, 0.8-4 MeV, 0.8-3 MeV, 0.8-2 MeV or 0.8-1.5 MeV) can
be used. In some embodiments doses between 1-100 Mrad (e. g., 2-80 Mrad, 5-50 Mrad,
-40 Mrad, 5-30 Mrad or 5-20 Mrad) can be used. In some preferred embodiments, an
energy between 0.8-3 MeV (e.g., 0.8-2 MeV or 0.8-1.5 MeV) combined with doses
between 5-50 Mrad (e. g., 5-40 Mrad, 5-30 Mrad or 5-20 Mrad) can be used.
Ion Particle Beams
Particles heavier than electrons can be utilized to irradiate materials, such as
carbohydrates or materials that include carbohydrates, e.g., cellulosic materials,
lignocellulosic materials, starchy als, or mixtures of any of these and others
described herein. For example, protons, helium nuclei, argon ions, silicon ions, neon ions
carbon ions, phosphorus ions, oxygen ions or nitrogen ions can be utilized. In some
embodiments, particles heavier than electrons can induce higher amounts of chain
scission (relative to lighter particles). In some ces, positively charged particles can
induce higher amounts of chain scission than negatively charged particles due to their
acidity.
Heavier particle beams can be generated, e.g., using linear accelerators or
cyclotrons. In some embodiments, the energy of each le of the beam is from about
1.0 omic unit (MeV/amu) to about 6,000 MeV/atomic unit, e.g., from about 3
MeV/ atomic unit to about 4,800 MeV/atomic unit, or from about 10 MeV/atomic unit to
about 1,000 MeV/atomic unit.
In certain embodiments, ion beams used to irradiate carbon-containing materials,
1O e. g., materials obtained from plants, can include more than one type of ion. For example,
ion beams can include mixtures of two or more (e.g., three, four or more) different types
of ions. Exemplary mixtures can include carbon ions and protons, carbon ions and
oxygen ions, nitrogen ions and protons, and iron ions and protons. More generally,
mixtures of any of the ions discussed above (or any other ions) can be used to form
irradiating ion beams. In particular, mixtures of relatively light and relatively heaVier
ions can be used in a single ion beam.
In some embodiments, ion beams for irradiating materials include positively-
charged ions. The positively charged ions can include, for example, vely charged
hydrogen ions (e. g., protons), noble gas ions (e. g., , neon, argon), carbon ions,
nitrogen ions, oxygen ions, silicon atoms, phosphorus ions, and metal ions such as
sodium ions, calcium ions, and/or iron ions. Without wishing to be bound by any theory,
it is believed that such positively-charged ions behave chemically as Lewis acid moieties
when d to materials, initiating and ning cationic ring-opening chain scission
reactions in an oxidative environment.
In certain embodiments, ion beams for irradiating als e vely-
charged ions. Negatively charged ions can include, for example, negatively charged
hydrogen ions (e.g., hydride ions), and negatively charged ions of various relatively
electronegative nuclei (e.g., oxygen ions, nitrogen ions, carbon ions, silicon ions, and
orus ions). Without wishing to be bound by any theory, it is believed that such
vely-charged ions behave chemically as Lewis base moieties when exposed to
materials, g anionic ring-opening chain scission reactions in a reducing
environment.
In some embodiments, beams for ating als can include neutral atoms.
For example, any one or more of hydrogen atoms, helium atoms, carbon atoms, nitrogen
atoms, oxygen atoms, neon atoms, silicon atoms, phosphorus atoms, argon atoms, and
iron atoms can be included in beams that are used for irradiation. In general, mixtures of
any two or more of the above types of atoms (e.g., three or more, four or more, or even
more) can be present in the beams.
In certain embodiments, ion beams used to irradiate als include singly-
1O charged ions such as one or more of HI, H", Hel,Nel, Ar}, C l, C", O l, O", Nl,N', Si}, Si",
P+, P", Na+, Ca+, and Fe+. In some embodiments, ion beams can include multiply-charged
ions such as one or more of CZI, C3: C4: N3: NSI, N3", 02+, 02', 022', Si2+, Si“, Siz', and
Si4'. In general, the ion beams can also include more complex polynuclear ions that bear
multiple ve or negative charges. In certain embodiments, by virtue of the ure
of the polynuclear ion, the positive or negative charges can be effectively buted over
substantially the entire ure of the ions. In some embodiments, the positive or
negative charges can be somewhat localized over ns of the structure of the ions.
Electromagnetic Radiation
In embodiments in which the irradiating is performed with electromagnetic
radiation, the electromagnetic radiation can have, e.g., energy per photon (in electron
volts) of greater than 102 eV, e.g., greater than 103, 104, 105, 106, or even greater than 107
eV. In some embodiments, the electromagnetic radiation has energy per photon of
between 104 and 107, e. g., between 105 and 106 eV. The electromagnetic radiation can
have a frequency of, e.g., greater than 1016 hz, greater than 1017 hz, 1018, 1019, 1020, or
even greater than 1021 hz. Typical doses may take values of greater than 1 Mrad (e. g.,
greater than 1 Mrad, greater than 2 Mrad). In some embodiments, the electromagnetic
radiation has a frequency of between 1018 and 1022 hz, e.g., between 1019 to 1021 hz. In
some embodiment doses between 1-100 Mrad (e. g., 2-80 Mrad, 5-50 Mrad, 5-40 Mrad,
-30 Mrad or 5-20 Mrad) can be used.
Quenching and Controlled Functionalization
After treatment with ionizing radiation, any of the materials or es bed
herein may become ionized; that is, the treated material may include radicals at levels
that are detectable with an electron spin resonance ometer. If an ionized feedstock
remains in the atmosphere, it will be oxidized, such as to an extent that carboxylic acid
groups are generated by reacting with the atmospheric oxygen. In some ces with
some materials, such oxidation is desired because it can aid in the further breakdown in
molecular weight of the carbohydrate-containing biomass, and the ion groups, e.g.,
carboxylic acid groups can be helpful for solubility and microorganism utilization in
1O some instances. However, since the radicals can “live” for some time after ation,
e.g., longer than 1 day, 5 days, 30 days, 3 months, 6 months or even longer than 1 year,
material properties can continue to change over time, which in some instances, can be
rable. Thus, it may be desirable to quench the ionized material.
After ionization, any ionized material can be quenched to reduce the level of
radicals in the ionized material, e.g., such that the radicals are no longer detectable with
the electron spin resonance spectrometer. For example, the radicals can be quenched by
the application of a sufficient pressure to the material and/or by utilizing a fluid in contact
with the ionized material, such as a gas or liquid, that reacts with (quenches) the radicals.
Using a gas or liquid to at least aid in the quenching of the radicals can be used to
fimctionalize the d material with a desired amount and kind of functional groups,
such as carboxylic acid groups, enol groups, aldehyde groups, nitro groups, nitrile
groups, amino groups, alkyl amino groups, alkyl groups, chloroalkyl groups or
chlorofluoroalkyl groups.
In some instances, such ing can improve the stability of some of the
ionized materials. For e, quenching can improve the resistance of the material to
oxidation. Functionalization by ing can also improve the solubility of any
material described herein, can improve its thermal stability, and can improve material
utilization by various microorganisms. For example, the functional groups imparted to
the al by the ing can act as receptor sites for attachment by microorganisms,
e. g., to enhance cellulose hydrolysis by various microorganisms.
In some embodiments, quenching includes an application of pressure to the
ionized material, such as by mechanically deforming the material, e.g., directly
mechanically compressing the material in one, two, or three dimensions, or applying
pressure to a fluid in which the material is immersed, e.g., isostatic pressing. In such
instances, the deformation of the material itself brings radicals, which are often trapped in
crystalline domains, in close enough proximity so that the radicals can recombine, or
react with another group. In some instances, the pressure is applied together with the
application of heat, such as a sufficient quantity of heat to elevate the temperature of the
material to above a melting point or softening point of a component of the material, such
1O as lignin, cellulose or llulose. Heat can improve molecular mobility in the
material, which can aid in the quenching of the radicals. When pressure is utilized to
quench, the pressure can be greater than about 1000 psi, such as greater than about 1250
psi, 1450 psi, 3625 psi, 5075 psi, 7250 psi, 10000 psi or even greater than 15000 psi.
In some ments, quenching es contacting the ionized material with a
fluid, such as a liquid or gas, e. g., a gas capable of reacting with the radicals, such as
acetylene or a mixture of acetylene in nitrogen, ethylene, chlorinated ethylenes or
chlorofluoroethylenes, ene or mixtures of these gases. In other particular
embodiments, ing includes contacting the d material with a liquid, e.g., a
liquid soluble in, or at least capable of penetrating into the material and ng with the
radicals, such as a diene, such as 1,5-cyclooctadiene. In some specific embodiments,
quenching includes contacting the material with an antioxidant, such as Vitamin E. If
desired, the feedstock can include an antioxidant dispersed therein, and the quenching can
come from contacting the antioxidant dispersed in the feedstock with the radicals.
Functionalization can be enhanced by utilizing heavy charged ions, such as any of
the heavier ions bed herein. For e, if it is desired to enhance oxidation,
charged oxygen ions can be ed for the irradiation. If nitrogen fianctional groups are
desired, nitrogen ions or anions that include en can be utilized. Likewise, if sulfur
or orus groups are desired, sulfur or orus ions can be used in the
irradiation.
Doses
In some instances, the irradiation is performed at a dosage rate of greater than
about 0.25 Mrad per second, e.g., r than about 0.5, 0.75, 1.0, 1.5, 2.0, or even
greater than about 2.5 Mrad per second. In some embodiments, the irradiating is
performed at a dose rate of n 5.0 and 1500.0 kilorads/hour, e.g., between 10.0 and
750.0 kilorads/hour or between 50.0 and 350.0 kilorads/hour. In some embodiments,
irradiation is performed at a dose rate of greater than about 0.25 Mrad per second, e.g.,
r than about 0.5, 0.75, 1, 1.5, 2, 5, 7, 10, 12, 15, or even greater than about 20 Mrad
per , e.g., about 0.25 to 2 Mrad per .
1O In some embodiments, the irradiating (with any radiation source or a combination
of sources) is performed until the material receives a dose of 0.25 Mrad, e. g., at least 1.0,
2.5, 5.0, 8.0, 10, 15, 20, 25, 30, 35, 40, 50, or even at least 100 Mrad. In some
embodiments, the irradiating is performed until the material receives a dose of between
1.0 Mrad and 6.0 Mrad, e.g., between 1.5 Mrad and 4.0 Mrad, 2 Mrad and 10 Mrad, 5
Mrad and 20 Mrad, 10 Mrad and 30 Mrad, 10 Mrad and 40 Mrad, or 20 Mrad and 50
Mrad. In some embodiments, the irradiating is performed until the material receives a
dose of from about 0.1 Mrad to about 500 Mrad, from about 0.5 Mrad to about 200 Mrad,
from about 1 Mrad to about 100 Mrad, or from about 5 Mrad to about 60 Mrad. In some
embodiments, a relatively low dose of radiation is applied, e.g., less than 60 Mrad.
Sonication
Sonication can reduce the molecular weight and/or crystallinity of materials, such
as one or more of any of the materials described herein, e.g., one or more ydrate
sources, such as cellulosic or lignocellulosic materials, or starchy materials. tion
can also be used to sterilize the materials. As discussed above with regard to radiation,
the process parameters used for sonication can be varied depending on s factors,
e. g., depending on the lignin content of the feedstock. For example, feedstocks with
higher lignin levels generally require a higher residence time and/or energy level,
resulting in a higher total energy delivered to the feedstock.
In one method, a first material that includes cellulose having a first number
average molecular weight (MM) is dispersed in a medium, such as water, and sonicated
2012/025023
and/or otherwise cavitated, to provide a second material that es cellulose having a
second number average molecular weight (MNZ) lower than the first number average
molecular weight. The second material (or the first and second material in certain
ments) can be combined with a microorganism (with or without enzyme
treatment) that can e the second and/or first material to produce an intermediate or
product.
Since the second al includes cellulose having a reduced molecular weight
relative to the first material, and in some instances, a reduced crystallinity as well, the
second material is generally more dispersible, swellable, and/or soluble, e. g., in a solution
1O containing a microorganism.
In some embodiments, the second number average molecular weight (MNZ) is
lower than the first number average molecular weight (MNl) by more than about 10
percent, e.g., more than about 15, 20, 25, 30, 35, 40, 50 percent, 60 percent, or even more
than about 75 percent.
In some instances, the second al includes cellulose that has a crystallinity
(C2) that is lower than the crystallinity (C1) of the cellulose of the first material. For
example, (C2) can be lower than (C1) by more than about 10 percent, e.g., more than
about 15, 20, 25, 30, 35, 40, or even more than about 50 percent.
In some embodiments, the starting llinity index (prior to sonication) is from
about 40 to about 87.5 percent, e.g., from about 50 to about 75 percent or from about 60
to about 70 percent, and the llinity index after sonication is from about 10 to about
50 percent, e. g., from about 15 to about 45 percent or from about 20 to about 40 percent.
However, in certain embodiments, e.g., after extensive sonication, it is possible to have a
crystallinity index of lower than 5 percent. In some embodiments, the material after
sonication is substantially amorphous.
In some embodiments, the starting number average molecular weight (prior to
sonication) is from about 0 to about 3,200,000, e.g., from about 250,000 to about
1,000,000 or from about 250,000 to about 700,000, and the number average molecular
weight after sonication is from about 50,000 to about 200,000, e.g., from about 60,000 to
about 150,000 or from about 70,000 to about 125,000. However, in some embodiments,
e. g., after ive sonication, it is possible to have a number average molecular weight
of less than about 10,000 or even less than about 5,000.
In some embodiments, the second material can have a level of oxidation (02) that
is higher than the level of oxidation (01) of the first material. A higher level of oxidation
of the material can aid in its dispersability, swellability and/or solubility, further
ing the material’s susceptibility to chemical, enzymatic or microbial . In
some embodiments, to increase the level of the oxidation of the second material relative
to the first material, the sonication is performed in an oxidizing medium, producing a
second material that is more oxidized than the first material. For e, the second
1O al can have more hydroxyl groups, aldehyde groups, ketone groups, ester groups or
carboxylic acid groups, which can increase its hydrophilicity.
In some embodiments, the sonication medium is an aqueous medium. If desired,
the medium can include an oxidant, such as a peroxide (e.g., hydrogen peroxide), a
dispersing agent and/or a buffer. es of dispersing agents include ionic dispersing
agents, e. g., sodium lauryl sulfate, and non-ionic dispersing agents, e. g., poly(ethylene
glycol).
In other embodiments, the sonication medium is non-aqueous. For e, the
sonication can be performed in a hydrocarbon, e.g., toluene or heptane, an ether, e.g.,
diethyl ether or tetrahydrofuran, or even in a liquefied gas such as argon, xenon, or
nitrogen.
Pyrolysis
One or more pyrolysis processing ces can be used to process carbon-
ning materials from a wide y of different sources to extract useful substances
from the materials, and to provide partially degraded materials which filnction as input to
fiarther processing steps and/or sequences. Pyrolysis can also be used to ize the
materials. Pyrolysis conditions can be varied depending on the characteristics of the
feedstock and/or other factors. For example, feedstocks with higher lignin levels may
require a higher temperature, longer residence time, and/or uction of higher levels
of oxygen during pyrolysis.
In one e, a first material that includes cellulose having a first number
average lar weight (MM) is pyrolyzed, e.g., by heating the first material in a tube
fiamace (in the presence or absence of oxygen), to provide a second material that includes
cellulose having a second number average molecular weight (MNZ) lower than the first
number average molecular .
Since the second material includes ose having a reduced molecular weight
ve to the first material, and in some instances, a reduced crystallinity as well, the
second material is generally more dispersible, swellable and/or soluble, e.g., in a solution
containing a microorganism.
1O In some embodiments, the second number e molecular weight (MNZ) is
lower than the first number average molecular weight (MNl) by more than about 10
percent, e.g., more than about 15, 20, 25, 30, 35, 40, 50 percent, 60 percent, or even more
than about 75 percent.
In some instances, the second material includes cellulose that has a crystallinity
(C2) that is lower than the crystallinity (C1) of the cellulose of the first material. For
example, (C2) can be lower than (C1) by more than about 10 percent, e.g., more than
about 15, 20, 25, 30, 35, 40, or even more than about 50 percent.
In some embodiments, the starting crystallinity (prior to pyrolysis) is from about
40 to about 87.5 percent, e. g., from about 50 to about 75 t or from about 60 to
about 70 percent, and the llinity index after pyrolysis is from about 10 to about 50
percent, e.g., from about 15 to about 45 percent or from about 20 to about 40 percent.
However, in certain embodiments, e.g., after extensive pyrolysis, it is possible to have a
crystallinity index of lower than 5 percent. In some embodiments, the material after
pyrolysis is substantially amorphous.
In some embodiments, the starting number average molecular weight (prior to
pyrolysis) is from about 200,000 to about 3,200,000, e.g., from about 250,000 to about
1,000,000 or from about 250,000 to about 700,000, and the number average molecular
weight after sis is from about 50,000 to about 200,000, e.g., from about 60,000 to
about 150,000 or from about 70,000 to about 125,000. However, in some ments,
e. g., after extensive sis, it is possible to have a number average molecular weight
of less than about 10,000 or even less than about 5,000.
In some embodiments, the second material can have a level of oxidation (02) that
is higher than the level of oxidation (01) of the first al. A higher level of oxidation
of the material can aid in its dispersability, swellability and/or solubility, further
enhancing the susceptibility of the material to chemical, enzymatic or microbial attack.
In some embodiments, to increase the level of the oxidation of the second material
relative to the first material, the pyrolysis is performed in an oxidizing environment,
producing a second material that is more oxidized than the first material. For example,
the second material can have more hydroxyl groups, aldehyde groups, ketone groups,
ester groups or carboxylic acid groups, than the first material, thereby increasing the
1O hydrophilicity of the material.
In some ments, the pyrolysis of the materials is continuous. In other
embodiments, the material is zed for a pre-determined time, and then allowed to
cool for a second pre-determined time before pyrolyzing again.
Oxidation
One or more oxidative sing sequences can be used to process -
containing materials from a wide variety of different sources to t useful substances
from the materials, and to provide partially degraded and/or altered material which
fianctions as input to further processing steps and/or sequences. The oxidation conditions
can be , e.g., ing on the lignin content of the ock, with a higher degree
of oxidation generally being desired for higher lignin content feedstocks.
In one method, a first material that includes cellulose having a first number
average molecular weight (MM) and having a first oxygen content (01) is oxidized, e.g.,
by heating the first material in a stream of air or oxygen-enriched air, to provide a second
material that includes cellulose having a second number average lar weight (MNZ)
and having a second oxygen content (02) higher than the first oxygen content (01).
The second number average molecular weight of the second material is generally
lower than the first number average molecular weight of the first material. For example,
the molecular weight may be reduced to the same extent as discussed above with respect
to the other physical treatments. The crystallinity of the second material may also be
reduced to the same extent as discussed above with respect to the other physical
treatments.
In some embodiments, the second oxygen t is at least about five percent
higher than the first oxygen content, e.g., 7.5 percent , 10.0 percent higher, 12.5
percent higher, 15.0 percent higher or 17.5 percent higher. In some preferred
embodiments, the second oxygen content is at least about 20.0 percent higher than the
first oxygen content of the first material. Oxygen content is measured by elemental
analysis by pyrolyzing a sample in a furnace operating at 1300 0C or higher. A suitable
elemental analyzer is the LECO CHNS-932 analyzer with a VTF-900 high temperature
1O pyrolysis furnace.
Generally, oxidation of a material occurs in an oxidizing environment. For
example, the oxidation can be effected or aided by pyrolysis in an oxidizing environment,
such as in air or argon enriched in air. To aid in the oxidation, various chemical agents,
such as oxidants, acids or bases can be added to the material prior to or during oxidation.
For example, a peroxide (e.g., benzoyl peroxide) can be added prior to oxidation.
Some oxidative methods of reducing recalcitrance in a biomass feedstock employ
-type chemistry. Such methods are disclosed, for example, in US. Serial No.
12/639,289, the te sure of which is orated herein by reference.
Exemplary oxidants include peroxides, such as hydrogen de and benzoyl
peroxide, fates, such as ammonium persulfate, activated forms of oxygen, such as
ozone, permanganates, such as potassium permanganate, perchlorates, such as sodium
perchlorate, and hypochlorites, such as sodium hypochlorite (household ).
In some situations, pH is ined at or below about 5.5 during contact, such as
between 1 and 5, between 2 and 5, between 2.5 and 5 or between about 3 and 5.
Oxidation ions can also e a contact period of between 2 and 12 hours, e. g.,
between 4 and 10 hours or between 5 and 8 hours. In some instances, temperature is
maintained at or below 300 OC, e.g., at or below 250, 200, 150, 100 or 50 0C. In some
instances, the temperature remains substantially ambient, e.g., at or about 20-25 0C.
In some embodiments, the one or more oxidants are applied as a gas, such as by
generating ozone in-sz'tu by irradiating the material through air with a beam of particles,
such as electrons.
In some embodiments, the mixture fiarther includes one or more hydroquinones,
such as 2,5-dimethoxyhydroquinone (DMHQ) and/or one or more benzoquinones, such
as 2,5-dimethoxy-l ,4-benzoquinone (DMBQ), which can aid in electron transfer
reactions.
In some embodiments, the one or more oxidants are electrochemically-generated
in-sz'tu. For example, hydrogen peroxide and/or ozone can be electro-chemically
produced within a contact or reaction vessel.
Other Processes T0 Solubilize, Reduce Recalcitrance Or To Functionalize
Any of the processes of this paragraph can be used alone without any of the
1O processes described , or in combination with any of the processes described herein
(in any : steam explosion, chemical treatment (e.g., acid treatment (including
concentrated and dilute acid treatment with l acids, such as sulfuric acid,
hydrochloric acid and organic acids, such as trifluoroacetic acid) and/or base treatment
(e.g., treatment with lime or sodium hydroxide)), UV treatment, screw extrusion
treatment (see, e. g., U.S. Serial No. 13/099,151, solvent treatment (e.g., ent with
ionic liquids) and freeze milling (see, e. g., U.S. Serial No. 12/502,629 now US. Patent
No. 7,900,857).
PRODUCTION OF FUELSa ACIDSa ESTERS AND/OR OTHER TS
AND USES
A typical feedstock obtained at least in part from plants contains cellulose,
llulose, and lignin plus lesser amounts of proteins, extractables and minerals.
After one or more of the processing steps discussed above have been performed on the
feedstock, the complex carbohydrates contained in the cellulose and llulose
fractions can in some cases be processed into fermentable sugars, optionally, along with
acid or enzymatic hydrolysis. The sugars ted can be converted into a variety of
products, such as ls or organic acids. The product obtained depends upon the
microorganism utilized and the conditions under which the bioprocessing occurs. In
other embodiments, the treated ock can be subjected to thermochemical conversion,
or other processing.
Examples of methods of further processing the treated feedstock are discussed in
the following sections.
Saccharification
In order to convert the treated feedstock to a form that can be readily fermented,
in some implementations the cellulose in the feedstock is first hydrolyzed to low
molecular weight carbohydrates, such as sugars, by a saccharifying agent, e. g., an
enzyme, a process referred to as saccharif1cation. In some implementations, the
saccharifying agent comprises an acid, e. g., a mineral acid. When an acid is used, co-
ts may be generated that are toxic to microorganisms, in which case the process
1O can further include removing such co-products. Removal may be performed using an
activated , e.g., activated charcoal, or other suitable techniques.
The treated ock can be hydrolyzed using an enzyme, e.g., by combining the
material and the enzyme in a t, e.g., in an aqueous solution.
Enzymes and biomass-destroying organisms that break down biomass, such as the
cellulose and/or the lignin portions of the feedstock, contain or manufacture various
cellulolytic s (cellulases), ligninases or various small molecule biomass-
destroying metabolites. These enzymes may be a complex of enzymes that act
synergistically to degrade crystalline cellulose or the lignin portions of biomass.
Examples of cellulolytic enzymes e: endoglucanases, cellobiohydrolases, and
cellobiases (B-glucosidases). A cellulosic substrate is lly yzed by
endoglucanases at random locations producing oligomeric intermediates. These
intermediates are then substrates for exo-splitting glucanases such as cellobiohydrolase to
e cellobiose from the ends of the cellulose polymer. Cellobiose is a water-soluble
nked dimer of e. y cellobiase cleaves cellobiose to yield glucose.
Fermentation
rganisms can produce a number of useful intermediates and products by
fermenting a low molecular weight sugar produced by saccharifying the treated
feedstock. For example, fermentation or other bioprocesses can produce ls,
organic acids, hydrocarbons, hydrogen, proteins or mixtures of any of these materials.
Yeast and Zymomonas bacteria, for example, can be used for fermentation or
conversion. Other microorganisms are discussed in the Materials section, below. The
optimum pH for fermentations is about pH 4 to 7. The optimum pH for yeast is from
about pH 4 to 5, while the optimum pH for Zymomonas is from about pH 5 to 6. Typical
fermentation times are about 24 to 168 (e.g., 24-96 hrs) hours with temperatures in the
range of 20 0C to 40 0C (e. g., 26 0C to 40 oC), however thermophilic microorganisms
prefer higher temperatures.
In some embodiments e.g., when anaerobic sms are used, at least a portion
of the fermentation is conducted in the e of oxygen e.g., under a t of an inert
1O gas such as N2, Ar, He, C02 or mixtures thereof. Additionally, the mixture may have a
constant purge of an inert gas flowing through the tank during part of or all of the
fermentation. In some cases, anaerobic condition can be achieved or ined by
carbon dioxide production during the fermentation and no additional inert gas is needed.
In some embodiments, all or a portion of the fermentation process can be
interrupted before the low molecular weight sugar is completely converted to a product
(e.g. ethanol). The intermediate fermentation products include high concentrations of
sugar and carbohydrates. The sugars and carbohydrates can be isolated as discussed
below. These intermediate fermentation products can be used in preparation of food for
human or animal ption. Additionally or alternatively, the intermediate
fermentation products can be ground to a fine particle size in a stainless-steel tory
mill to produce a flour-like substance.
The fermentations e the methods and products that are disclosed in US.
Provisional Application Serial No. 61/579,559, filed December, 2011 and US.
Provisional Application Serial No. 61/579,576, filed December, 2011 incorporated
herein by reference.
Mobile fermentors can be ed, as bed in US. Provisional Patent
Application Serial No. 60/832,735, now hed International Application No. WO
2008/011598. Similarly, the sacchariflcation equipment can be mobile. Further,
sacchariflcation and/or tation may be performed in part or entirely during transit.
Fuel Cells
Where the methods described herein produce a sugar on or suspension, this solution
or suspension can subsequently be used in a fuel cell. For example, fiJel cells utilizing
sugars derived from cellulosic or lignocellulosic materials are disclosed in US.
Provisional Application Serial No. ,568, filed December 22, 2011, the complete
disclosure of which is incorporated herein by reference.
Thermochemical Conversion
Thermochemical conversion can be performed on the treated feedstock to produce
one or more desired intermediates and/or products. A thermochemical sion
1O process includes ng molecular structures of carbon-containing material at elevated
temperatures. Specific examples include gasif1cation, pyrolysis, reformation, partial
oxidation and mixtures of these (in any order).
Gasif1cation converts carbon-containing materials into a synthesis gas (syngas),
which can include methanol, carbon monoxide, carbon dioxide and hydrogen. Many
microorganisms, such as acetogens or homoacetogens are capable of utilizing a syngas
from the thermochemical conversion of s, to produce a product that includes an
alcohol, a carboxylic acid, a salt of a carboxylic acid, a carboxylic acid ester or a mixture
of any of these. Gasiflcation of biomass (e. g., cellulosic or ellulosic als), can
be accomplished by a variety of techniques. For example, gasif1cation can be
accomplished utilizing staged steam reformation with a fluidized-bed reactor in which the
carbonaceous material is first pyrolyzed in the absence of oxygen and then the pyrolysis
vapors are reformed to synthesis gas with steam providing added hydrogen and .
In such a technique, process heat comes from g char. Another technique utilizes a
screw auger reactor in which re and oxygen are introduced at the sis stage
and the process heat is generated from burning some of the gas produced in the latter
stage. Another technique utilizes entrained flow reformation in which both external
steam and air are introduced in a single-stage gasif1cation reactor. In l oxidation
gasif1cation, pure oxygen is utilized with no steam.
POST-PROCESSING
Distillation
After fermentation, the resulting fluids can be distilled using, for e, a “beer
column” to separate ethanol and other alcohols from the majority of water and residual
solids. The vapor exiting the beer column can be, e. g., 35% by weight ethanol and can be
fed to a rectification column. A mixture of nearly azeotropic (92.5%) ethanol and water
from the cation column can be purified to pure ) ethanol using vapor-phase
molecular sieves. The beer column bottoms can be sent to the first effect of a three-effect
evaporator. The rectification column reflux condenser can provide heat for this first
1O effect. After the first , solids can be ted using a centrifuge and dried in a
rotary dryer. A portion (25%) of the centrifuge effluent can be recycled to fermentation
and the rest sent to the second and third evaporator effects. Most of the evaporator
condensate can be returned to the process as fairly clean condensate with a small portion
split off to waste water treatment to prevent build-up of low-boiling compounds.
Other Possible Processing of Sugars
Processing during or after saccharification can e isolation and/0r
concentration of sugars by chromatography e.g., simulated moving bed chromatography,
precipitation, centrifugation, crystallization, solvent evaporation and combinations
thereof. In addition, or ally, sing can include isomerization of one or more of
the sugars in the sugar solution or suspension. Additionally, or optionally, the sugar
solution or suspension can be chemically processed e. g., glucose and xylose can be
hydrogenated to sorbitol and xylitol respectively. Hydrogenation can be accomplished by
use of a catalyst e. g., Pt/y-A1203, Ru/C, Raney Nickel in combination with H2 under high
pressure e.g., 10 to 12000 psi.
Some possible sing steps are disclosed in in US. Provisional ation
Serial No. 61/579,552, filed December 22, 201 1, and in US. Provisional Application
Serial No. ,576 fi1ed December 22, 2011, incorporated by reference above.
INTERMEDIATES AND TS
Using, e.g., such primary ses and/or post-processing, the treated biomass
can be converted to one or more products, such as energy, fuels, foods and materials.
Specific examples of products include, but are not limited to, hydrogen, sugars (e. g.,
glucose, xylose, arabinose, mannose, galactose, fructose, disaccharides, oligosaccharides
and polysaccharides), ls (e. g., monohydric alcohols or dihydric alcohols, such as
ethanol, n-propanol, isobutanol, sec-butanol, tert—butanol or n-butanol), hydrated or
hydrous alcohols, e.g., containing greater than 10%, 20%, 30% or even greater than 40%
water, sugars, biodiesel, organic acids (e. g., acetic acid and/or lactic acid), hydrocarbons,
1O co-products (e.g., proteins, such as olytic proteins (enzymes) or single cell proteins),
and mixtures of any of these in any combination or relative concentration, and optionally
in combination with any additives, e.g., fuel additives. Other examples include
carboxylic acids, such as acetic acid or butyric acid, salts of a carboxylic acid, a mixture
of carboxylic acids and salts of carboxylic acids and esters of carboxylic acids (e.g.,
methyl, ethyl and n-propyl esters), ketones, aldehydes, alpha, beta unsaturated acids, such
as acrylic acid, s, such as ethylene, and es of any of these. Other alcohols
and alcohol derivatives include propanol, ene , l,4-butanediol, 1,3-
propanediol, sugar alcohols (e.g., erythritol, , glycerol, ol threitol, arabitol,
ribitol, mannitol, dulcitol, fucitol, iditol, isomalt, maltitol, lactitol, xylitol and other
polyols), methyl or ethyl esters of any of these alcohols. Other products include methyl
te, methylmethacrylate, lactic acid, propionic acid, butyric acid, succinic acid, 3-
hydroxypropionic acid, a salt of any of the acids and a mixture of any of the acids and
respective salts.
In some embodiments using, e.g., such primary processes and/or post-processing,
the treated biomass can be converted to a platform chemical. For example, as stated
above, the treated biomass can be converted to butanols (e.g., isobutanol, sec-butanol,
tert-butanol or nol) which are important platform chemicals. For example,
dehydration of butanols can produce butenes such as l-butene, cis-Z-butene, trans
butene and isobutene, which are highly valuable starting materials for synthetic fiaels,
ants and other valuable als. Specifically, l-butene can be used in the
creations of polymers, e.g., linear low density polyethylene, 2-butene isomers are
valuable starting materials for lubricants and agricultural chemicals, and Isobutene can be
rized to butyl rubber, methyl tert-butyl ether and isooctane. In addition, synthetic
petroleum kerosene can be synthesized by oligomerization of butenes. Other
intermediates and products, including food and pharmaceutical products, for example
edible als selected from the group consisting of pharmaceuticals, nutriceuticals,
ns, fats, vitamins, oils, fiber, minerals, sugars, carbohydrates and alcohols, are
described in US. Serial No. 12/417,900, the filll sure of which is hereby
incorporated by reference herein.
MATERIALS
1O Modified Plant Materials
The plant feedstock is obtained at least in part from one or more types of modified
plants, as sed herein. In some cases, the feedstock includes more than one type of
plant, and/or more than one n of the plant, e.g., the stalk, fruit, and cob of a corn
plant. The plant may be, for example, a corn, soybean, beet, , rapeseed, potato,
rice, alfalfa, or sugarcane plant. The plant may also be any of the many types of
genetically ed plants that are grown. The feedstock may contain a mixture of
different types of plants, different parts of a particular plant, and/or mixtures of plant
materials with other materials e.g., s materials.
In some cases the entire plant can be used. For e, in cases where a crop is
ruined by adverse growing conditions (e.g., drought, frost, flooding, pest infestation) the
ruined crop can be useful in the methods and processes described herein.
Other Feedstock Materials
In addition or as an alternative to the modified plant materials discussed above,
the ock can include other materials e.g., biomass materials, that may or may not be
genetically modified. The biomass can be, e. g., a cellulosic or lignocellulosic material.
Such materials include paper and paper products (e.g., polycoated paper and Kraft paper),
wood, wood-related materials, e. g., particle board, grasses, rice hulls, bagasse, jute,
hemp, flax, bamboo, sisal, abaca, straw, switchgrass, alfalfa, hay, corn cobs, corn stover,
2012/025023
coconut hair; and materials high in (x-cellulose content, e. g., cotton. Feedstocks can be
obtained from virgin scrap textile materials, e.g., remnants, post consumer waste, e.g.,
rags. When paper products are used they can be virgin materials, e.g., scrap virgin
materials, or they can be post-consumer waste. Aside from virgin raw materials, post-
consumer, industrial (e. g., offal), and processing waste (e. g., effluent from paper
processing) can also be used as flber sources. Biomass feedstocks can also be obtained or
derived from human (e. g., sewage), animal or plant wastes. Additional osic and
lignocellulosic materials have been described in US. Patent Nos. 6,448,307; 6,258,876;
6,207,729; 5,973,035 and 5,952,105.
1O In some embodiments, the biomass material includes a carbohydrate that is or
includes a al having one or more B-l ,4-linkages and having a number average
molecular weight between about 3,000 and 50,000. Such a carbohydrate is or includes
ose (I), which is derived from (B-glucose 1) h condensation of B(l,4)-
idic bonds. This linkage contrasts itself with that for (1(1 ,4)-glycosidic bonds
present in starch and other carbohydrates.
\ O ’
Starchy als include starch itself, e. g., corn starch, wheat , potato
starch or rice starch, a derivative of , or a material that includes starch, such as an
edible food product or a crop. For example, the starchy material can be arracacha,
buckwheat, banana, barley, cassava, kudzu, oca, sago, sorghum, regular household
potatoes, sweet potato, taro, yams, or one or more beans, such as favas, lentils or peas.
Blends of any two or more starchy materials are also starchy materials.
In some instances the biomass is a microbial material. Microbial sources include,
1O but are not limited to, any naturally occurring or genetically d microorganism or
organism that contains or is capable of providing a source of carbohydrates (e. g.,
cellulose), for example, protists, e. g., animal protists (e. g., protozoa such as flagellates,
amoeboids, ciliates, and sporozoa) and plant ts (e.g., algae such alveolates,
rachniophytes, cryptomonads, euglenids, glaucophytes, haptophytes, red algae,
stramenopiles, and eplantae). Other examples include seaweed, plankton (e.g.,
macroplankton, mesoplankton, microplankton, nanoplankton, picoplankton, and
plankton), phytoplankton, bacteria (e.g., gram ve bacteria, gram ve
bacteria, and extremophiles), yeast and/or mixtures of these. In some instances,
microbial biomass can be obtained from natural sources, e. g., the ocean, lakes, bodies of
water, e.g., salt water or fresh water, or on land. Alternatively or in addition, microbial
biomass can be obtained from culture systems, e.g., large scale dry and wet culture
systems.
Saccharifying Agents
Suitable enzymes include cellobiases and cellulases capable of degrading
biomass.
Suitable cellobiases include a cellobiase from ASpergz'lluS niger sold under the
tradename ME 188TM.
ases are capable of degrading biomass, and may be of fiJngal or bacterial
origin. Suitable enzymes e cellulases from the genera Bacillus, Pseudomonas,
la, Fusarz'um, Thielavz'a, Acremonium, ChrySOSporz'um and Trichoderma, and
include s ofHumicola, CaprinuS, Thielavz'a, Fusarium, Mycelz'ophthora,
Acremonium, Cephalosporz'um, Scytalz'dz'um, Penicillium or ASpergz'lluS (see, e. g., EP
1O 458162), especially those produced by a strain selected from the s Humicola
insolenS (reclassified as Scytalz'clz'um thermophilum, see, e.g., US. Patent No. 4,435,307),
CaprinuS cinereus, Fusarz'um rum, ophthora thermophila, Merlpz'luS
giganteus, vz'a terrestriS, Acremonium Sp., Acremonium persicinum, Acremonium
nium, Acremonium brachypem'um, Acremonium dichromosporum, Acremonium
obclavatum, Acremonium pinkertonz'ae, nium roseogriseum, Acremonium
incoloratum, and Acremom’umfuratum; preferably from the species Humicola insolenS
DSM 1800, um oxySporum DSM 2672, Myceliophthora thermophila CBS 117.65,
Cephalosporium Sp. RYM-202, Acremonium Sp. CBS 478.94, Acremonium Sp. CBS
265.95, Acremonium persicinum CBS 169.65, Acremonium acremonium AHU 9519,
Cephalosporium Sp. CBS 535.71, Acremonium brachypem'um CBS , Acremonium
dichromosporum CBS 683.73, Acremonium obclavatum CBS 311.74, Acremonium
pinkertonz'ae CBS 157.70, Acremonium roseogriseum CBS 134.56, Acremonium
incoloratum CBS 146.62, and Acremom’umfuratum CBS 299.70H. Cellulolytic enzymes
may also be obtained from Chrysasporz’um, preferably a strain of ChrySOSporz'um
lucknowense. Additionally, Trichoderma (particularly Trichoderma viride, Trichoderma
reesez’, and Trichoderma gz'z'), alkalophilic Bacillus (see, for example, US. Patent
No. 3,844,890 and EP 458162), and Streptomyces (see, e.g., EP 458162) may be used.
Enzyme complexes may be utilized, such as those available from Genencore
under the tradename ACCELLERASE®, for example, erase® 1500 enzyme
complex. Accellerase 1500 enzyme complex contains multiple enzyme activities, mainly
exoglucanase, endoglucanase (2200-2800 CMC U/g), hemi-cellulase, and beta-
glucosidase 75 pNPG U/g), and has a pH of 4.6 to 5.0. The endoglucanase activity
of the enzyme complex is expressed in carboxymethylcellulose activity units (CMC U),
while the beta-glucosidase ty is reported in ucoside activity units (pNPG U).
In one embodiment, a blend of Accellerase® 1500 enzyme complex and NOVOZYMETM
188 cellobiase is used.
Fermentation Agents
The microorganism(s) used in tation can be natural microorganisms and/or
engineered microorganisms. For example, the microorganism can be a bacterium, e. g., a
1O cellulolytic bacterium, a fungus, e.g., a yeast, a plant or a t, e. g., an algae, a
protozoa or a fiangus-like protist, e.g., a slime mold. When the organisms are ible,
mixtures of sms can be utilized.
Suitable fermenting microorganisms have the ability to convert carbohydrates,
such as glucose, fructose, xylose, arabinose, mannose, galactose, oligosaccharides or
polysaccharides into fermentation ts. Fermenting microorganisms include strains
of the genus Sacchromyces spp. e.g., Sacchromyces siae (baker’s yeast),
Saccharomyces distaticas, Saccharomyces avaram; the genus Klayveromyces, e.g.,
species Klayveromyces marxianas, Klayveromycesfragilis; the genus a, e. g.,
Candida pseudotropicalis, and Candida brassicae, Pichia stipitis (a relative of Candida
shehatae, the genus Clavispora, e.g., species Clavispora lasitaniae and Clavispora
opantiae, the genus Pachysolen, e.g., species Pachysolen tannophilas, the genus
Bretannomyces, e.g., species Bretannomyces clausenii (Philippidis, G. P., 1996,
Cellulose bioconversion technology, in Handbook on Bioethanol: tion and
Utilization, Wyman, C.E., ed., Taylor & Francis, Washington, DC, 179-212). Other
suitable microorganisms include, for e, Zymomonas mobilis, Clostridiam
cellam (Philippidis, 1996, supra), Clostridiam saccharobalylacetonicam,
Clostridiam saccharobatylicam, Clostridiam Paniceam, Clostridiam beijernckii,
Clostridiam acetobatylicam, Moniliella pollinis, Yarrowia lipolytica, Aareobasidiam 519.,
Trichosporonoides 519., Trigonopsis variabilis, Trichosporon sp., Moniliellaacetoabatans,
Typhala variabilis, Candida magnoliae, Ustilaginomycetes, Pseudozyma tsakabaensis,
2012/025023
yeast species of genera Zygosaccharomyces, Debaryomyces, Hansenula and Pichia, and
fiJngi of the dematioid genus Torula.
Commercially available yeasts include, for example, Red Star®/Lesaffre Ethanol
Red (available from Red Star/Lesaffre, USA), FALI® (available from Fleischmann’s
Yeast, a division of Burns Philip Food Inc., USA), SUPERSTART® (available from
Alltech, now Lalemand), GERT STRAND® able from Gert Strand AB, Sweden)
and FERMOL® (available from DSM Specialties).
OTHER EMBODIMENTS
1O A number of embodiments of the invention have been described. Nevertheless, it
will be understood that s ations may be made without departing from the
spirit and scope of the invention.
For example, the process parameters of any of the sing steps discussed
herein can be adjusted based on the lignin t of the feedstock, for e as
disclosed in US. Serial No. ,519, the full sure of which is incorporated
herein by reference.
The process may include any of the features described in US. Application Serial
No. 13/276,192, the filll disclosure of which is incorporated herein by reference,
including treating a cellulosic or ellulosic material to alter the structure of the
al by irradiating the material with relatively low voltage, high power electron beam
radiation, boiling or steeping the feedstock prior to saccharif1cation, and irradiating a
cellulosic or lignocellulosic material with an on beam at a dose rate of at least 0.5
Mrad/sec.
While it is possible to perform all the processes described herein at one physical
location, in some embodiments, the processes are completed at multiple sites, and/or may
be performed during transport.
Lignin liberated in any process described herein can be captured and utilized. For
example, the lignin can be used as captured as a plastic, or it can be synthetically
upgraded to other plastics. In some instances, it can be utilized as an energy source, e.g.,
burned to provide heat. In some instances, it can also be converted to lignosulfonates,
which can be utilized as binders, dispersants, emulsifiers or as sequestrants.
Measurement of the lignin content of the starting feedstock can be used in process control
in such lignin-capturing processes.
When used as a binder, the lignin or a lignosulfonate can, e.g., be utilized in coal
briquettes, in ceramics, for binding carbon black, for binding fertilizers and herbicides, as
a dust suppressant, in the making of plywood and particle board, for binding animal
feeds, as a binder for fiberglass, as a binder in um paste and as a soil stabilizer.
As a dispersant, the lignin or lignosulfonates can be used, e.g., concrete mixes,
clay and cs, dyes and pigments, leather tanning and in gypsum board.
As an emulsifier, the lignin or lignosulfonates can be used, e. g., in asphalt,
1O pigments and dyes, pesticides and wax emulsions.
As a sequestrant, the lignin or lignosulfonates can be used, e.g., in micro-nutrient
systems, cleaning compounds and water treatment systems, e.g., for boiler and cooling
systems.
As a g source, lignin generally has a higher energy content than
llulose (cellulose and hemicellulose) since it contains more carbon than
homocellulose. For example, dry lignin can have an energy t of n about
11,000 and 12,500 BTU per pound, compared to 7,000 an 8,000 BTU per pound of
holocellulose. As such, lignin can be densified and converted into briquettes and pellets
for burning. For example, the lignin can be converted into pellets by any method
described herein. For a slower g pellet or briquette, the lignin can be crosslinked,
such as applying a radiation dose of between about 0.5 Mrad and 5 Mrad. Crosslinking
can make a slower burning form factor. The form factor, such as a pellet or briquette, can
be converted to a “synthetic coal” or charcoal by zing in the absence of air, e. g., at
between 400 and 950 OC. Prior to pyrolyzing, it can be desirable to crosslink the lignin to
maintain structural integrity.
Accordingly, other embodiments are within the scope of the following claims.
EXAMPLES OF GENETICALLY MODIFIED PLANTS
The following US Patents and US Patent ations disclose, by example,
genetically modified al (e. g., plants, parts of plants) for the processes described
herein or together with any materials bed herein.
7566817 7763783 9 7659459 7615694 7534943
7652202 7763782 7714208 7659458 7615693 7531724
7569747 7763780 7709712 7659457 7615692 7528305
7405344 7759563 7709711 7659456 7612268 4
7683237 7759562 7709710 7659455 7612267 7525029
7615621 7759561 7709709 7655849 6 7525027
1 7759560 7709708 7655847 0 7525026
7816590 7759559 7705221 7655846 7608765 7521614
7816589 7750215 7705220 7655845 7608763 3
7816587 7745707 7705216 7655844 7608762 7521612
7807904 7741547 7700859 7655841 7605316 9
7807903 7741546 7700858 7642433 7605315 7521607
7807902 7737348 7 7642432 7605314 7518044
7807901 7737347 7692077 7642431 7605313 7518043
7807900 7737346 7692076 7642430 7605312 7518042
7807899 7737345 7687689 9 7605311 7518041
7807898 7737344 3 7642428 7605309 7514612
7 7737343 7683242 7638694 7601900 7514611
7807896 7732685 7683241 7638693 9 7514610
7807895 7732684 7683239 7638692 1 7514609
7807894 7728208 7678976 7638691 7598440 7511204
7807893 7723589 7678975 7638690 7595440 7511203
7807892 8 7678974 7638689 7595439 7511202
7807891 7723587 7678973 5 7595438 7511201
7807890 7723586 7678972 7632994 7595437 7511200
9 7723585 7678971 7632990 7592527 7507880
7807888 7718870 7678970 7629519 7592526 7507879
7807887 7718869 7678969 7629518 7592525 7504569
7804011 7718868 7678968 7629517 1 7
7804010 7 7678967 7629516 7592520 7504566
7804009 7718866 7678966 7629515 7582434 7501565
7804008 7718865 7674961 7626101 7576265 7501564
7804007 7718864 7671256 7626100 7566822 7498494
7804006 3 7667113 7626099 7563966 7495157
7804005 7718862 7667112 7626098 7563965 7495156
7804004 7718861 7667111 7622660 7560625 7495155
7804003 7718860 7667110 7622659 7557279 7488874
7804002 7718859 7667109 7619153 7550655 7488873
7804001 7714216 7663037 7619152 7547827 7488872
7804000 7714215 7663036 7619151 7547826 7485783
7803999 7714214 7663035 0 7547824 7479589
7786359 7714213 7663034 7619147 8 7479586
7781651 7714212 2 7615697 7544867 7479585
7781650 7714211 7659461 6 7541527 7476785
7772469 7714210 7659460 7615695 7541523 7476784
2012/025023
7476783 7381870 7262348 7179972 7737332 7544863
7473830 7381869 7259303 9 7732679 7544862
7473829 7381868 7256335 7176365 7728206 7534939
7473826 7375266 7256334 7173172 7718854 7531718
7470839 7375265 7256333 7169983 7714202 6
7470836 7371948 7250564 7166778 7714201 7521594
7468477 7371947 7247777 7166777 7709706 7511130
7371946 4 7166776 7709705 7465849
7462764 7371945 7235726 7164068 7388135 7423203
7462763 7368643 7235725 7164065 7388134 7417177
7459613 7368640 7235724 7161070 7381861 7417176
7459612 7365252 7235722 7161069 7253345 7408096
7459611 7365251 7235720 7157630 3 7405343
7456345 7365250 7232945 7157626 7247774 7385107
7456344 7365249 4 5 7223907 7365241
7456343 7361820 7232943 7157624 7189514 7335812
7456342 7361819 7230173 7157281 RE39580 9
7453031 7361818 7227062 7154031 7816581 7304206
7453030 7361817 7227061 7151208 9 7294711
7449622 7361815 8 7148410 7807874 7288408
1 4 0 6906250 7807873 7268276
7449620 7358427 7217874 6864409 2 7262339
7449619 7 7217873 6855877 7807811 7250501
7439424 7351890 7217872 6825400 7803928 7244877
7432427 7351888 7217871 6114610 7799970 7230165
7432426 7342156 7211717 6103959 3 7227056
7429696 7342155 7211716 8 7786353 7217867
7 7342152 7208663 6084161 7786350 5
7423206 7339101 2 6054640 7750207 7205457
7423204 7339100 7208661 7112725 7745694 7
7417183 9 7208660 7825304 7728190 7186893
7417182 7339098 7205466 7825303 7714189 7157619
7414181 7335827 7205465 7825302 7705201 7151204
7408099 7335826 7205464 7825301 7700838 7148398
7399915 7335822 7199291 7825300 7692067 7141722
7399912 7329803 0 7825300 7674952 7138278
7399911 7321088 7193146 7820888 7674894 7122719
7394003 7321087 7193143 7820887 7662940 7112717
7390946 7321086 7189906 7803997 7655838 7078592
7390945 7321085 7189904 7799972 7635764 7067722
7388140 7321084 7189903 7750213 7625738 7064249
7388139 7319182 7186906 7750212 7615680 7022897
7385122 5 7186904 7745704 7605244 6943281
1 7297848 7186903 7741543 7601890 6916970
7385120 7294772 7186901 7737335 7595382 6841717
7381874 7288704 7186899 4 7589188 6822142
7381873 7268279 7183471 7737333 7553952 6803501
6620988 7728196 9 7557277 7491870 7381867
6538179 7723583 7626088 7557276 7488869 6
6538178 7714198 7 7557275 7488868 7378578
6501009 7709703 7626086 7557274 7488867 7378577
7705211 7622646 7557273 7485781 7375262
6448476 7705208 7622645 7557272 7485780 7371938
6448473 7705207 7622644 7557271 6 7368637
6284949 7700849 7622643 7557270 7479583 5
6281016 7700847 2 7554016 7479582 7358420
6177615 7700846 7619143 7554015 7468474 7355103
6175061 4 7619142 7554014 7459609 7355102
3 7700843 7619141 7554013 7453029 7351886
9 7692070 7619140 7550653 7453028 7351885
6023013 7687686 7619139 7531722 7446244 7345228
5463175 7687685 7615688 7531721 7442864 7345227
7531725 7687684 7615687 7531720 7442863 7345226
6 7678965 7612259 7531719 7442862 7345225
7253346 7678964 7608761 7528306 0 7345224
7214863 7678963 7605306 7528301 7439422 7342151
7186900 7678962 7598434 7525028 7423200 7342150
7166780 7659454 7595435 7525025 7423199 7332656
7166779 7659453 7592517 7525019 7414177 7332655
8 7659452 7592516 7525018 7414176 7329801
7157627 7655839 7592514 7525017 7408097 7326832
7563949 7652199 7592513 7521608 7405349 7321082
7807884 7652198 7592512 7521605 7405348 7321079
7799973 7652197 7592511 7518036 7399909 7314983
4 7649129 7582810 7514607 7399907 7314982
7786357 8 7579525 7514606 7396983 7314981
9 7649127 7579524 7514605 7394000 7314980
7777104 7649126 7579523 7514604 7390942 7312382
7777103 7642413 7572960 7514603 7390941 0
7767887 7642412 7572958 7514602 7390940 7309818
7759556 7642411 7572957 7507878 7390939 1
7759553 7642410 7572956 7507877 7390938 7304218
7759551 7642409 7569752 7504565 7388132 7304214
7732677 7642408 7569751 7504564 7388131 7304213
7732676 7642407 7569750 7501563 7388130 7301076
7732675 7632987 7566821 7501562 7385117 7297843
7732674 7632985 7566820 0 7385116 7294770
7732673 7629510 7563955 7498491 5 7294768
7732672 7629509 7563954 7498490 7385113 7294765
7728204 7629508 7563953 9 7385112 7294764
7728203 7629507 7560619 7498486 7385111 7294763
7728202 7629506 8 7498485 7385110 7291771
1 7626091 7560617 7498484 7385109 7291769
7728199 7626090 6 7491871 8 7285704
7279621 1 7045687 6900373 6 5902923
7276648 7129399 7045686 6900372 6063990 0
7271324 7126046 7041881 6894207 6063989 5880346
7265277 7119260 7041880 6888049 6051761 5
7265276 7119259 7041879 6888048 6043414 5880344
7265275 7119258 4 6884927 6040499 5872304
7265274 7115801 7034210 6884926 9 5872303
7265273 7109399 7034209 5 6034303 5866774
7265272 7105728 7030301 6884924 6034302 5866773
7265271 7105727 7030300 6884923 1 5866772
7265270 7105726 7019199 6881879 6034300 5866771
7259299 7102062 7012174 6875908 6034299 5859352
7259298 7102061 7005563 6870079 9 5723745
7256330 7098385 2 6861579 6020542 7268274
7247772 7098384 7002058 6858784 6020541 7402731
7247771 7091403 6982367 3 6018108 6865556
7244881 7087815 6982366 6852912 6018107 5424412
7241941 7084328 6979761 6849786 6005171 5463175
7241939 6 6979760 6849785 6005170 5484956
7235718 7084325 6972355 6846973 6002073 5554798
7217870 7084324 6972354 6835873 5998709 559387
7217869 7081572 3 6828489 8 5641876
7217868 7078600 6969787 6815589 5998707 5659122
7196253 7078598 6967263 6815588 5998706 571084
7196252 7078597 6960707 6815587 5 5728925
7196251 7078595 6958436 6815586 5998704 5750871
7193140 7074989 6953876 6809237 3 5804425
9 7074988 6951973 6781040 5990391 5859347
7193137 7071390 6936754 6653534 5986179 6020190
7189900 7071389 6936753 6198027 5986178 6025545
7189898 8 6933423 6177618 5981851 6040497
7183467 7071387 6924418 7 5981850 6051753
7183465 7067723 6919498 6137034 5981849 6180774
7183464 7064253 6914174 6133510 5981848 6218188
7183463 7060878 3 6124527 5981845 3
7183462 7060877 6914172 6121518 5977449 6489542
7183461 7057096 6911585 6121517 5977448 6501009
7176359 7057095 6911581 6121516 5977447 6548291
7176358 4 6911580 6121515 5977444 6573240
7176357 7057093 6911579 4 5973235 6645497
7173168 7057092 6911578 6103957 5969218 6660911
7169976 7053280 6906248 6100454 5969217 6737273
7169975 7053279 6906247 6096949 8 6753463
7169974 7053272 6906246 6091005 5942666 0
7166774 7049494 6903253 6087562 5932786 6893872
7148408 7049493 6903251 6084159 5929310 6900371
7138570 7045691 6900376 8 5907088 6943282
WO 12529
6949696 7482510 7834247 7772465 7663031 7601894
6962705 7473819 7834246 7772370 7663029 7598443
7064249 7465850 7834245 7767889 7655848 7598442
7112665 7456337 7834240 7767888 7655843 7598439
7112725 7456335 7829764 7763778 7655842 7598438
7141722 7442853 7829760 7763465 7652201 7
7157281 7439417 7825310 7759564 7652200 7598435
7223907 7435875 7825309 7759555 7652195 7595436
7227056 7427698 7825308 7759554 7645923 7592524
7250501 7427696 7825307 7759544 7645922 3
7288643 7425666 7825299 3 7645921 7592522
7381861 7425665 4 7754949 7642421 7592519
7435807 7423196 7825234 7754948 0 7592505
7449564 7399904 7820895 7750216 7642419 7589264
7514544 7399903 7820894 7745706 7642418 7589263
RE38825 7375209 7820893 7745705 7642417 7589261
RE39247 7317140 7820892 7745702 7638695 7589260
7829761 7303919 7820891 7745701 8 7589259
7807882 7271316 7820886 5 7632993 7589258
7803987 7259294 7820885 7737342 7632992 7589257
7799971 7238856 7816586 7737341 7632989 7589176
7795500 7235713 7816585 7737340 7632988 7586028
7795414 5 1 7737336 7629514 7586027
3 7189893 7812230 7737330 7629513 7586026
7763777 7186561 7812226 7736897 7629512 7586025
7763776 7179962 7812225 7732683 7629511 6
7718858 7176026 7812223 7732668 7629505 7582815
7718857 7166767 7812216 7728207 7629504 7582814
7714190 7164057 7807883 7718856 7624533 7582813
7709698 3 6 7714205 7622647 7582812
3 7135618 7803998 7 7622637 7582811
7622570 7125719 7803996 7714184 7619149 7582808
7619137 7105723 7803993 7709702 7619148 7579530
7608759 7087261 7803990 7705219 7615690 7579529
7 7034208 9 7705218 7612265 7579522
7598431 6867351 7 7700856 7612264 7576271
7579517 6825399 7799975 7700855 7612263 7576270
7563948 6818805 7799974 7700854 7612262 7576269
7521598 6784338 7799566 7700836 7612256 7576268
7521597 6774288 7795508 7700832 7612254 7576267
7514599 7 7795506 1 7612251 7576266
7504559 9 7790969 7687687 7608764 7572963
7498482 6689939 7790874 7683240 7608755 2
7498429 4 7777107 7667115 7608752 7572961
7495151 6329518 7777106 7667107 7605307 7572955
7485775 6225526 7772468 7663033 8 7569757
7482511 7834257 7772467 2 7601897 7569756
WO 12529
7569755 7525023 7456339 7371936 7317149 7276650
7569754 7525022 7442861 7365253 7317148 7276649
3 7525021 5 7361812 7317147 7276647
7569749 7525020 7439421 7361807 7317146 7276596
7566819 7521611 7439348 7358425 7317145 7273975
7563964 7521610 7435885 7358424 7317143 7273973
3 7521604 7435883 7358423 7317137 7273972
7563962 7521603 7435881 7355108 0 1
7563961 7521602 7435880 7355106 7314989 7273965
7563960 7521601 7435879 7355105 7314988 7271327
7563959 7518037 7432424 7355104 7314987 7271326
7563958 7514601 7432423 7351882 7312385 7271323
7563957 7511205 7432422 7351878 7312384 7271319
7560624 7511196 7432421 7348469 7312377 7270380
7560623 5 7432418 7348468 7312375 7268278
7560612 7511194 7429695 7345230 7309816 7268277
7557266 7511193 7427702 7342157 7306946 7268270
7557263 7511192 7427701 7342154 7304222 7268226
7554020 8 7427700 7339097 7304221 7265279
7553951 7504568 7423202 7339096 7304212 7265265
7550657 7504558 7423197 7339092 7304211 7262350
7550656 7501561 7420103 8 7301082 7262349
7550575 7498488 7414180 7335825 7301080 7262347
7547832 7498487 9 7335824 7301079 7262346
7547831 7498413 7414174 7335823 7301075 7262345
7547830 7495154 7411118 7 7301069 7262342
7547829 0 7411113 0 0 7259305
7491869 2 7332659 7297849 7259304
7547822 7485779 7399914 7332658 1 7259302
7544869 7485778 7399910 7332650 7294774 7259301
6 7482515 7399908 7329806 7294769 7256332
7544865 7482513 7399906 7329805 7 7256331
7544864 7479588 7396980 4 7294766 7256322
7544857 1 7393999 7326836 7291774 7256280
7541526 7476781 7388141 5 7291773 7253000
7473828 7388137 7326833 7288703 7250552
7541524 7473827 7388133 7326830 7288701 7241943
7541521 7473821 7388128 3 7288700 7241942
7541520 7470838 7388125 7321089 7288699 7241940
7541517 7470834 7381872 7321083 7285707 7241934
7538261 7470833 7381871 7321031 7285706 7238859
7528308 7468278 7381865 7319183 7285702 7235723
7528307 7465856 7381863 7317154 7282629 6
7528300 7465852 7378574 7317153 7282627 7230172
7528299 7462766 7375264 7317152 7282626 7230171
7528293 7462760 3 7317151 7279615 7230169
7525024 7459610 7371944 7317150 2 7230158
7227065 7179971 7151207 5 7005565 6951974
7227064 7179970 7151205 7064252 7002061 6949699
7227063 7179968 7148406 7064251 7002056 6946589
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Claims (40)
1. A method of making a product comprising: providing a saccharified feedstock obtained at least in part from a plant that has been modified with t to a wild type variety of the plant, the feedstock having been exposed to irradiation from an ion beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad; and contacting the saccharified ock with a microorganism to ferment the saccharified feedstock, the feedstock having an improved nutrient mix for the microorganism ve to the wild type variety, wherein the improved nutrient mix es fermentation of the saccharified feedstock by the microorganism.
2. The method of claim 1, wherein the feedstock comprises lignocellulosic or cellulosic material.
3. The method of claim 1 or 2, wherein the plant has been genetically modified.
4. The method of any one of claims 1-3, wherein the plant ses recombinant DNA.
5. The method of any one of claims 1-4, wherein the plant comprises one or more recombinant genes.
6. The method of any one of claims 1-5, wherein the plant expresses a recombinant protein.
7. The method of any one of claims 1-6, wherein the plant expresses one or more recombinant materials.
8. The method of claim 7, wherein the recombinant material is a r or a macromolecule.
9. The method of any one of claims 1-8, further comprising obtaining from the feedstock a material selected from the group consisting of pharmaceuticals, nutriceuticals, proteins, fats, vitamins, oils, fiber, minerals, sugars, carbohydrates and alcohols.
10. The method of any one of claims 1-9, further comprising treating the feedstock with an enzyme to produce a product.
11. The method of claim 10, wherein the product comprises a sugar.
12. The method of an y one of claims 1-11, further comprising ing the spent feedstock as an animal feed.
13. The method of any one of claims 1-12, wherein the feedstock comprises a crop e.
14. The method of claim 13, wherein the feedstock comprises corn cobs and/or corn stover.
15. The method of claim 13, n the feedstock comprises wheat straw.
16. The method of any one of claims 1-15, wherein the plant comprises a genetically modified corn or soybean plant.
17. The method of any one of claims 1 -16, wherein the plant has been modified with a modification ed from the group consisting of enhancement of resistance to insects, fungal diseases, and other pests and e-causing agents; increased tolerance to herbicides; increased drought resistance; extended ature range; enhanced tolerance to poor soil; ed stability or shelf-life; greater yield; larger fruit size; stronger stalks; enhanced shatter resistance; d time to crop maturity; more uniform ation times; higher or ed starch production; enhanced nutrient production; modified lignin content; enhanced ose, hemicellulose and/or lignin degradation; reduced recalcitrance and enhanced phytate metabolism.
18. The method of any one of claims 1-15 or 17, wherein the plant is a genetically modified alfalfa, potato corn, wheat, beet, cotton, rapeseed, rice, or sugarcane plant.
19. The method of any one of claims 1-18, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising more than one type of ion.
20. The method of any one of claims 1-19, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising one or more of: protons, helium ions, carbon ions, nitrogen ions, oxygen ions, noble gas ions, argon ions, silicon ions, phosphorus ions, sodium ions, calcium ions, and iron ions.
21. The method of any one of claims 1-20, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising a mixture of ions ing a light ion and a heavier ion.
22. The method of any one of claims 1-21, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising a mixture of ions including one or more of: carbon ions and protons, carbon ions and oxygen ions, nitrogen ions and protons, and iron ions and protons.
23. The method of any one of claims 1-22, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising positively charged ions.
24. The method of any one of claims 1-23, wherein the feedstock having been d to irradiation from an ion beam comprises ng at least some of the feedstock to an ion beam in the presence of an oxidizing nment.
25. The method of any one of claims 1-24, wherein the feedstock having been exposed to ation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising negatively charged ions.
26. The method of any one of claims 1-25, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam in the presence of a reducing environment.
27. A product comprising sugar produced from a saccharified feedstock obtained at least in part from a plant that has been modified with respect to a wild type variety of the plant, the feedstock having been exposed to irradiation from an ion beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad, and contacted with a microorganism to ferment the saccharified feedstock; and the feedstock having an ed nt mix for the microorganism relative to the wild type variety, the ed nutrient mix being effective to enhance fermentation of the irradiated feedstock by the microorganism.
28. A product comprising an irradiated feedstock obtained at least in part from a plant that has been modified with respect to a wild type variety of the plant, the feedstock having been exposed to ation from an ion beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad; and the feedstock having an improved nutrient mix for a microorganism relative to the wild type variety, the improved nutrient mix being effective to e fermentation of the irradiated ock by the microorganism.
29. The product of claim 28 further comprising a microorganism and/or an enzyme.
30. The product of claim 28 or 29 further comprising a liquid medium.
31. A product comprising a saccharified cellulosic or lignocellulosic feedstock obtained at least in part from a plant that has been modified with respect to a wild type variety of the plant, the feedstock having been d to irradiation from an ion beam, the total dose of irradiation being from about 5 Mrad to about 50 Mrad; and the feedstock having an ed nutrient mix for a microorganism relative to the wild type variety, the improved nutrient mix being effective to enhance fermentation of the saccharified feedstock by the microorganism.
32. The product of any one of claims 27-31, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising more than one type of ion.
33. The product of any one of claims 27-32, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam sing one or more of: protons, helium ions, carbon ions, en ions, oxygen ions, noble gas ions, argon ions, silicon ions, phosphorus ions, sodium ions, calcium ions, and iron ions.
34. The product of any one of claims 27-33, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the ock to an ion beam comprising a mixture of ions ing a light ion and a heavier ion.
35. The product of any one of claims 27-34, wherein the ock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising a mixture of ions including one or more of: carbon ions and protons, carbon ions and oxygen ions, nitrogen ions and protons, and iron ions and protons.
36. The product of any one of claims 27-35, wherein the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising positively charged ions.
37. The product of any one of claims 27-36, wherein the feedstock having been d to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam in the presence of an oxidizing environment.
38. The product of any one of claims 27-37, n the feedstock having been exposed to irradiation from an ion beam comprises exposing at least some of the feedstock to an ion beam comprising negatively charged ions.
39. The product of any one of claims 27-38, wherein the feedstock having been exposed to ation from an ion beam comprises exposing at least some of the feedstock to an ion beam in the presence of a reducing environment.
40. The method of claim 1 or the product according to any one of claims 27, 28 or 31 substantially as herein before described with nce to the Examples.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ714143A NZ714143B2 (en) | 2011-02-14 | 2012-02-14 | Processing Biomass |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161442781P | 2011-02-14 | 2011-02-14 | |
US61/442,781 | 2011-02-14 | ||
NZ612186A NZ612186B2 (en) | 2011-02-14 | 2012-02-14 | Processing biomass |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ708603A NZ708603A (en) | 2016-09-30 |
NZ708603B2 true NZ708603B2 (en) | 2017-01-05 |
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