WO2022170395A1 - Procédés de production de fumier monogastrique traité - Google Patents
Procédés de production de fumier monogastrique traité Download PDFInfo
- Publication number
- WO2022170395A1 WO2022170395A1 PCT/AU2022/050087 AU2022050087W WO2022170395A1 WO 2022170395 A1 WO2022170395 A1 WO 2022170395A1 AU 2022050087 W AU2022050087 W AU 2022050087W WO 2022170395 A1 WO2022170395 A1 WO 2022170395A1
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- WO
- WIPO (PCT)
- Prior art keywords
- biomass
- manure
- animal
- bromoform
- effective amount
- Prior art date
Links
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
- C05F3/06—Apparatus for the manufacture
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C3/00—Treating manure; Manuring
- A01C3/02—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure
- A01C3/023—Digesters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
Definitions
- the present invention relates to methods, systems and compositions for the treatment of monogastric animal manure.
- Methane (CH 4 ) in the atmosphere is a potent greenhouse gas (GHG) with an IPCC Fifth Assessment Report (AR5) global warming potential 28 times that of carbon dioxide (CO 2 ) (IPCC 2014). Between 2000 and 2009, agriculture and waste management accounted for 62% of global anthropogenic CH 4 emissions.
- Biogas is envisioned as a key element in emerging renewable energy strategies in many parts of the world, and is incentivized by governments setting targets for renewable energy use. Biogas mainly contains CH 4 (50-75%) and CO 2 (25-50%).
- the present invention provides a method for reducing methane production from anaerobic degradation of monogastric animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the biomass is a biomass of red marine macroalgae.
- the red marine macroalgae is an Asparagopsis species or a Bonnemaisonia species.
- the red marine macroalgae is selected from the group consisting of Asparagopsis taxiformis, Bonnemaisonia hamifera and Bonnemaisonia asparagoides.
- the animal manure is a monogastric animal manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.1% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.2% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.4% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.8% of organic matter of the manure.
- the animal manure is from an animal selected from the members of the Suina suborder or the Galliformes order.
- said animal is a swine or a poultry.
- the present invention provides an additive for reducing methane production from anaerobic degradation of animal manure, said additive comprising an effective amount of a biomass comprising bromoform.
- the biomass comprising bromoform is a biomass of red marine macroalgae.
- the red marine macroalgae is an Asparagopsis species or a Bonnemaisonia species.
- the Asparagopsis species is Asparagopsis taxiformis or Asparagopsis armata.
- the animal manure is a monogastric animal manure.
- the effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.1% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.2% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.4% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.8% of organic matter of the manure.
- the animal is selected from the members of the Suina suborder or the Galliformes order.
- the animal is a swine or poultry.
- the present invention provides a method for reducing methane production from anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of an additive as described herein.
- the present invention provides a method for anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the present invention provides a method as described herein comprising initiating anaerobic degradation of animal manure in a system comprising a reactor vessel.
- the present invention provides a system when used for a method described herein.
- Figure 1 shows the amount of methane (CH4) produced (as % of headspace gas) by ruminant manure in the presence of Asparagopsis at different levels of inclusion (as a % of organic matter; ⁇ M’).
- FIG. 2 shows example biomass of Asparagopsis taxiformis and Asparagopsis armata contain bromoform.
- Depths in meters is shown for collection depths of free floating Asparagopsis armata tetrasporporophyte stage.
- Figure 3 shows the amount of methane (CH4) produced (as % of headspace gas) by beef cattle manure in the presence of Asparagopsis at an inclusion level of 0.5% of organic matter; ⁇ M’).
- Figure 4 shows the amount of methane (CH4) produced (as % of headspace gas) by dairy cattle manure in the presence of Asparagopsis at an inclusion level of 0.5% of organic matter; ⁇ M’).
- Figure 5 shows the amount of methane (CH4) produced (as % of headspace gas) by swine manure in the presence of Asparagopsis at an inclusion level of 0.5% of organic matter; ⁇ M’).
- Figure 6 shows the amount of methane (CH4) produced (as % of headspace gas) by poultry manure in the presence of Asparagopsis at an inclusion level of 0.5% of organic matter; ⁇ M’).
- the present inventors have examined the effect of bromoform containing biomass on ruminal fermentation in vitro using rumen fluid, or administration to animals in feed, but, prior to the present invention, it was not known whether biomass containing bromoform can mitigate methane production in circumstances other than via ruminal fermentation.
- composition of manure is physically and structurally distinct from the composition of rumen fluid. It is also known that the rumen and manure microbiomes differ significantly.
- Bromoform is volatile and has physical properties (including its volatility) which make impractical its use in vivo or in vitro.
- the use of synthetic bromoform on ruminal fermentation in vivo has not been studied. Furthermore, exposure to high levels of concentrated bromoform are considered to be hazardous to animals.
- bromoform and chemically related compounds e.g. bromochloromethane
- synthetic/purified chemicals are unsafe and disallowed for human and animal applications, including the inhibition of methanogenesis in ruminant animals.
- inhibitors that reduce enteric CH4 when administered to animals in animal feed are unable to reduce CH 4 yield when added to manure.
- an enteric CH 4 inhibitor, 3-nitrooxypropanol (3NOP) administered in animal feed reduced CH 4 emission from beef cattle by 59% and the reduction of DNA copy number of methanogens.
- 3NOP 3-nitrooxypropanol
- Other studies with 3NOP have reported reductions in CH 4 emissions ranging from 24% in sheep and up to 60% in dairy cattle. While 3NOP is effective in reducing enteric CH 4 production when administered to animals in feed, it does not decrease CH 4 yield when added to animal manure. For example, Nkemka et al.
- a problem with anerobic digestion of swine and poultry (e.g. chicken) manure is inhibition due to the high content of nitrogen- and sulfur-containing compounds formed in the process of hydrolysis. It has been determined that swine and chicken manure digestion is primarily limited by the content of nitrogen-containing compounds, which can be present in a substrate in the forms of ammonium and non-dissociated ammonia
- Ammonia has a strong inhibitory effect on methanogens, resulting in inhibition of anaerobic digestion.
- the present invention is based in part on the surprising discovery that bromoform containing biomass, such as a biomass of Asparagopsis, when contacted with monogastric animal manure can reduce methane production from anaerobic digestion of the animal manure in vitro, without passing through the digestive system of the animal.
- Figures 1, 3, and 4 show a reduction of methane produced in vitro from anaerobic fermentation of ruminant manure contacted with red marine macroalgae.
- Figures 5 and 6 show a reduction of methane produced in vitro from anaerobic fermentation of monogastric (swine and poultry) manure. Surprisingly, the reduction was greater for poultry manure.
- the present invention provides a method for reducing methane production from anaerobic degradation of monogastric animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the term “reducing” includes the reduction of amount of substance in comparison with a reference. For example, the reduction in the amount of total gas and/or methane produced by an animal manure contacted with a biomass comprising bromoform, a biomass of red marine macroalgae or an additive according to the present invention, relative to an animal manure not contacted with a biomass comprising bromoform, a biomass of red marine macroalgae or additive according to the present invention.
- the reduction can be measured in vitro, for example with a system that models anaerobic fermentation. It is within the knowledge and skill of those trained in the art to assess methane and/or total gas production from manure.
- reducing methane production refers to the reduction of methane produced, for example, the amount of methane produced from manure over a period of time.
- the term includes the specific volume of methane generated as a result of anaerobic fermentation, for example, from stored manure, in a biodigester, or in the systems described herein. Anaerobic fermentation of manure gives rise to production of methane.
- the present invention aims to reduce this process, such as to reduce the total amount of methane produced. It is within the knowledge and skill of those trained in the art to assess methane production.
- reducing methanogenesis refers to the reduction of methane produced, for example, the amount of methane produced from manure over a period of time, by anaerobic methanogens in the manure.
- the term includes the specific volume of methane generated as a result of methanogenesis, for example, from stored manure, in a biodigester or in the systems described herein.
- Methanogenesis in manure gives rise to production of methane.
- the present invention aims to reduce this process, such as to reduce the total amount of methane produced. It is within the knowledge and skill of those trained in the art to assess methane production.
- a biomass comprising bromoform may be used for reducing total gas produced from manure.
- the term “reducing total gas production” refers to the reduction of the total amount of gas produced, for example the amount of total gas produced from manure over a period of time.
- the term includes the collective volume of all gasses generated as a result of anaerobic fermentation, for example, from stored manure or in the systems described herein. Fermentation of manure gives rise to production of gas including methane.
- the present invention aims to reduce this process, such as to reduce the total amount of gas produced. It is within the knowledge and skill of those trained in the art to assess total gas production.
- anaerobic degradation refers to anaerobic fermentation in vitro, for example, in stored manure or manure present in a digester, or a system described herein. Anaerobic fermentation results in the production of biogas which includes methane and carbon dioxide. Anaerobic degradation includes wet anaerobic degradation.
- Methane formation is a consequence of anaerobic fermentation of organic matter (OM) by a microbial consortium that produces substrate CO2 and hydrogen in a reduction pathway used by methanogens.
- the mode of action of low molecular weight halomethanes is proposed to be through enzymatic inhibition by reaction with reduced vitamin B12 which chemically resembles coenzyme F430 - a cofactor proposed to be needed for methanogenesis, and this reaction may reduce the efficiency of the cobamide-dependent methyl transferase step required for methanogenesis.
- 3-nitrooxypropanol a compound designed to inhibit the activity of methyl coenzyme-M reductase, the enzyme responsible for microbial formation of CFU, decreases enteric CFU emissions from lactating dairy cows when administered in animal feed, but does not decrease total methane yields when added to animal manure.
- inhibitors in vivo has demonstrated that the microbiota can become resistant to inhibitors such as BES, as a consequence of microbial resistance, it has been proposed that some inhibitors of methane production will not have a significant or long-term role in reducing methane (Mathison et al. Journal of Applied Animal Research, 14:1, 1-28).
- the compound bromoform has been demonstrated to be readily degraded under anerobic conditions.
- Bromoform at initial concentrations ranging from 132 to 177 pg/L, underwent >99% reduction in a continuous-flow biofilm column seeded with primary settled sewage with 1.5 hours packed-bed detention time (Cobb and Bouwer Environ. Sci. Technol. 25: 1068-1074).
- biomass comprising the volatile halomethane bromoform can be contacted with monogastric animal manure and, surprisingly, cause effective inhibition of methanogenesis.
- the biomass is in a form in which the bromoform (and one or more of dibromocholoromethane, bromochloroacetic acid, dibromoacetic acid, and/or dichloromethane) remain effective, allowing inhibition or methanogenesis in anaerobic conditions.
- the biomass can be included as whole biomass, or an extracted biomass (e.g. an extract prepared from the biomass, wherein effective components are extracted from the biomass). Accordingly, in one embodiment the biomass is an extracted biomass.
- the present invention provides a method for reducing methanogenesis in an animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the methods of the present invention are performed under conditions where methanogenesis by methanogens can occur, for example, anaerobic conditions.
- the methods described herein are performed at a temperature permissive of methanogenesis, such as a psychrophilic (15 to 25°C), mesophilic (30 to 38°C), and thermophilic (50 to 60°C), temperature.
- a temperature permissive of methanogenesis such as a psychrophilic (15 to 25°C), mesophilic (30 to 38°C), and thermophilic (50 to 60°C), temperature.
- thermophilic systems are more sensitive to environmental changes, such as temperature fluctuations and chemical concentrations produced during anaerobic degradation, because the number of functional microorganism species that thrive at this temperature is considerably less than those that survive at lower temperatures.
- Below 15°C in usual systems, the production of biogas is greatly reduced and CO2 becomes the dominant product of anaerobic digestion; therefore, anaerobic digestion systems are usually not recommended for geographic locations with average temperatures below this threshold without supplemental heat and temperature control.
- the present invention provides a method as described herein wherein the method provides contacting manure containing anaerobic methanogenic organisms with an effective amount of biomass or extracted biomass comprising bromoform.
- an anaerobic inoculum comprising anaerobic methanogenic organisms is added to the manure or to the system to effect anaerobic degradation.
- the present invention relates to a method of manufacturing treated monogastric manure, said method comprising: a. providing a monogastric animal manure and initiating an anaerobic degradation process in a system (e.g. bioreactor) b. contacting the animal manure with an effective amount of biomass or extracted biomass comprising bromoform under anaerobic conditions; and c. collecting the treated manure.
- a system e.g. bioreactor
- biomass comprising bromoform may be contacted with an animal manure (e.g. by adding a biomass comprising bromoform) at a regular interval.
- an animal manure e.g. by adding a biomass comprising bromoform
- the present invention relates to a method of manufacturing treated manure, said method comprising: a. providing a monogastric animal manure and initiating an anaerobic degradation process in a system (e.g. bioreactor) b. contacting the animal manure with an effective amount of biomass or extracted biomass comprising bromoform under anaerobic conditions at a regular interval; and c. collecting the treated manure.
- the present invention relates to a method of manufacturing treated manure, said method comprising: a. providing a monogastric animal manure and initiating an anaerobic degradation process in a system (e.g. bioreactor), by adding an anaerobic inoculum b. contacting the animal manure with an effective amount of biomass or extracted biomass comprising bromoform under anaerobic conditions; and c. collecting the treated manure.
- a system e.g. bioreactor
- the treated manure e.g. effluent of a digester, also referred to as digestate, typically contains most of the nutrients found in the manure, and is used interchangeably with the terms sludge and liquor.
- animal manure or “an animal manure” refers to faecal matter or manure produced as a by-product of an animal's digestion of food which has exited the animal, for example manure from cattle, swine, sheep, horses, mink, chicken or human faecal matter which may be in the form of sewage sludge or septage.
- the term includes compositions comprising faecal matter or manure produced as a by-product of an animal's digestion of food.
- the manure is a monogastric animal manure, such as a swine manure or poultry manure.
- the manure is manure from one species of animal.
- the manure is manure from two or more species of animal (e.g. ‘co-digestion’ or ‘co-degradation’).
- co-digestion e.g. ‘co-digestion’ or ‘co-degradation’
- monogastric e.g.
- Methane production by monogastric animals is lower than methane production by ruminants.
- methane production by large herbivorous monogastric animals such as horses, mules and asses is substantial (up to 80 I per animal per day).
- Methane production by rodents and avians is low.
- the biomass comprising bromoform can be used for methods and additives for treating manure from swine (e.g. pigs), poultry (e.g. ducks, chickens and turkeys), horses, dogs, cats and humans.
- swine e.g. pigs
- poultry e.g. ducks, chickens and turkeys
- horses dogs, cats and humans.
- the present invention is particularly useful for treating manure of swine and poultry. Therefore, in one embodiment, said animal is selected from the members of the Suina suborders or the Galliformes order. In another embodiment, said monogastric animal is swine or poultry.
- red marine macroalgae possess the property of inhibiting methane production when contacted with manure from a monogastric animal.
- the present invention provides methods and compositions as described herein, wherein the animal manure is a monogastric animal manure.
- red marine macroalgae possess the property of inhibiting methane production when contacted with manure from monogastric animals such as swine and poultry manure.
- a biomass comprising bromoform may be also used for reducing total gas produced from manure of a monogastric animal.
- the present invention provides methods and compositions as described herein, wherein the animal manure is a monogastric animal manure.
- a monogastric animal is an animal with a single chambered stomach, such as a swine (e.g. a pig) or an avian (e.g. poultry).
- contact and “contacting”, is meant the action of introducing a biomass comprising bromoform or an additive according to the invention directly or indirectly into or onto an animal manure.
- contacting may be performed by mixing the biomass comprising bromoform or an additive according to the invention with an animal manure, or adding a biomass comprising bromoform or an additive according to the invention (e.g. spraying) onto the surface of an animal manure, adding the biomass comprising bromoform or an additive according to the invention into a biodigester or manure storage or any other means to bring the biomass comprising bromoform or an additive according to the invention into contact with an animal manure.
- the term includes placing the biomass comprising bromoform in sufficiently close proximity with the animal manure to enable the biomass comprising bromoform to alter methane production from the animal manure (e.g. act on the manure).
- Bromoform (CHBr3, tribromomethane) is a halomethane and has been shown to inhibit enzymatic activities by binding to vitamin B12, which chemically resembles coenzyme F430 - a cofactor needed for methanogenesis.
- volatile secondary metabolites such as bromoform derived from Asparagopsis could complex with coenzyme F430 when added to an animal manure, nor whether a bromoform containing biomass could allow complexing of bromoform with coenzyme F430 when added to an animal manure, let alone inhibit methanogenesis.
- a “biomass comprising bromoform” refers to a mass of biological material, e.g. material prepared from a biological source, and includes biological or ‘organic’ sources of bromoform, for example biomass of red marine macroalgae such as an Asparagopsis species, or a Bonnemaisonia species which accumulate bromoform, or biomass of an organism engineered to produce and/or accumulate bromoform.
- the biomass comprising bromoform is at least one species of red marine macroalgae selected from a species of belonging the five genera of red seaweed in the family Bonnemaisoniaceae (for example, Asparagopsis, Bonnemaisonia, Delisea, Ptilonia, Leptophyllis and Pleuroblepharidella).
- Bonnemaisoniaceae for example, Asparagopsis, Bonnemaisonia, Delisea, Ptilonia, Leptophyllis and Pleuroblepharidella.
- the six genera of red seaweed in the family Bonnemaisoniaceae (for example Asparagopsis, Bonnemaisonia, Delisea, Ptilonia, Leptophyllis and Pleuroblepharidella), produce and store bioactive halogenated natural products. These secondary metabolites function as natural defenses against predation, fouling organisms and microorganisms, and competition among species.
- the species of red marine macroalgae is an Asparagopsis species.
- Asparagopsis has a heteromorphic life history with two free-living life history stages - a gametophyte (large foliose form) and a sporophyte (or tetrasporophyte - smaller, filamentous form). Historically, the tetrasporophyte was recognised as a separate genus ( Falkenbergia ). Therefore, the term “ Asparagopsis ” as used herein refers to the genus Asparagopsis, and other taxonomic classifications now known to belong to the genus Asparagopsis.
- Asparagopsis taxiformis There are two recognised species of Asparagopsis, one tropical/sub-tropical (Asparagopsis taxiformis) and one temperate ( Asparagopsis armata ) and present throughout the world.
- A. taxiformis has been shown to contain bromoform, dibromocholoromethane, bromochloroacetic acid, dibromoacetic acid, and dichloromethane, with bromoform being the most abundant natural product in the biomass of Asparagopsis (1723 pg g-1 dry weight [DW] biomass), followed by dibromochloromethane (15.8 pg g-1 DW), bromochloroacetic acid (9.8 pg g-1 DW) and dibromoacetic acid (0.9 pg g-1 DW).
- Bromoform, dibromoacetic acid, dibromochloromethane and bromochloroacetic acid are produced and stored in specialised gland cells from where they are released onto the surface functioning as a natural defence against herbivores.
- the present inventors propose volatile secondary metabolites such as bromoform are present in sufficient quantities in red algal (e.g. Asparagopsis spp. and Bonnemaisonia spp.) biomass to reduce methane production from ruminal fermentation in vitro, and surprisingly are bioavailable to inhibit methanogenesis without the biomass passing through the digestive system of the animal (e.g. not having been physically chewed/ruminated, entered the stomach and contacted the stomach contents,), and importantly, when not present in in vivo circumstances whereby volatile secondary metabolites released are released into the animal, nor present in a nutrient rich in vivo environment supportive of anaerobic fermentation.
- red algal e.g. Asparagopsis spp. and Bonnemaisonia spp.
- the at least one species of red marine macroalgae is a species of the genus Asparagopsis selected from: a. Asparagopsis armata b. Asparagopsis taxiformis
- the at least one species of red marine macroalgae is a species of the genus Bonnemaisonia.
- the at least one species of red marine macroalgae is a species of the genus Bonnemaisonia selected from: a. Bonnemaisonia hamifera b. Bonnemaisonia asparagoides.
- the biomass comprising bromoform is an organism capable of synthesizing and/or accumulating secondary metabolites such as bromoform.
- an “effective amount” of the biomass comprising bromoform may be determined by the methods described herein, including the in vitro dose-response studies described herein. For example, the present inventors have demonstrated that methane production/anaerobic fermentation in vitro can be used to examine the effect of amounts of the biomass comprising bromoform on levels of methane production. Therefore, anaerobic fermentation in vitro can be used to characterize doses of the biomass comprising bromoform that may be an effective amount sufficient to allow improvement, e.g. reduction in the amount of methane production in comparison with a reference or control or reduction in the amount of total gas produced in comparison with a reference or control.
- an effective amount of the at least one species of red marine macroalgae may be determined by the methods described herein, including the in vitro dose- response studies described herein.
- the present inventors have demonstrated that methane production/anaerobic fermentation of manure in vitro can be used to examine the effect of amounts of the at least one species of red marine macroalgae on levels of methane production. Therefore, anaerobic fermentation in vitro can be used to characterize doses of the at least one species of red marine macroalgae that may be an effective amount sufficient to allow improvement, e.g. reduction in the amount of methane production in comparison with a reference or control or reduction in the amount of total gas produced in comparison with a reference or control.
- an effective amount includes a quantity of biomass of red marine macroalgae sufficient to allow improvement, e.g. reduction in the amount of methane production in comparison with a reference or control, and/or reduction in the amount of total gas produced in comparison with a reference or control.
- manure microbiota can maintain functional capacity for fermentation of the organic matter in manure, but at reduced capacity.
- the bromoform containing biomass e.g. a biomass comprising at least one species of red marine macroalgae
- the bromoform containing biomass is preferably contacted with an animal manure in a form that results in the effects described herein (e.g. to reduce CFU output) without decreasing the quality of the manure.
- the bromoform containing biomass e.g. a biomass comprising at least one species of red marine macroalgae
- the bromoform containing biomass is preferably contacted with an animal manure in a form that results in the effects described herein (e.g. to reduce CFU output) and maintains the quality of the manure.
- decreasing CFU emissions from manure will decrease the loss of organic carbon as CFU from the animal manure. Accordingly, in one embodiment the levels of organic carbon in the animal manure are maintained. In another embodiment the levels of organic carbon in the animal manure are improved compared. In another embodiment the levels of organic carbon in the animal manure are improved compared to untreated manure.
- the present invention also provides methods of maintaining levels of organic carbon in an animal manure, comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the methods of the present invention can be performed with manure in a system to result in treated manure from which less ChU has been produced from anaerobic degradation. Accordingly, the present invention provides a treated manure (e.g. ‘digestate’ produced by the methods described herein).
- the treated animal manure is useful for several industrial and agricultural purposes such as a fertilizer.
- the present invention relates to a method of manufacturing treated monogastric manure, said method comprising: a. providing an animal manure and initiating an anaerobic degradation process in a system (e.g. bioreactor) b. contacting the animal manure with an effective amount of biomass or extracted biomass comprising bromoform under anaerobic conditions; and c. collecting the treated manure.
- a system e.g. bioreactor
- the treated manure is used as a fertilizer.
- the method further comprises treating the treated manure to commercial grade fertilizer.
- the present invention provides a composition comprising an effective amount of a biomass comprising bromoform, wherein the composition can be added to any anerobic system, such as rice paddies or bio-solid treatment systems (including without limitation, animal manure), which otherwise produce methane, and to other waste materials to give the waste materials useful characteristics.
- anerobic system such as rice paddies or bio-solid treatment systems (including without limitation, animal manure), which otherwise produce methane, and to other waste materials to give the waste materials useful characteristics.
- the biomass comprising bromoform is contacted in a form of the biomass in which bromoform remains effective.
- the biomass further comprises one or more of dibromocholoromethane, bromochloroacetic acid, dibromoacetic acid, and/or dichloromethane.
- the biomass comprising bromoform is preferably contacted in a form in which the bromoform and one or more of dibromocholoromethane, bromochloroacetic acid, dibromoacetic acid, and/or dichloromethane remain effective.
- freeze dried milled Asparagopsis possess the property of reducing methane production from anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform.
- the biomass comprising bromoform is prepared in a manner suitable for contacting with manure.
- the biomass comprising bromoform is biomass of at least one species of red marine macroalgae
- the biomass is freeze dried.
- the biomass comprising bromoform is biomass of at least one species of red marine macroalgae
- the biomass is freeze dried and ground to a powder.
- the biomass of at least one species of red marine macroalgae is freeze dried and ground through a sieve (e.g. a 1mm sieve).
- the biomass of at least one species of red marine macroalgae is air dried.
- the biomass of at least one species of red marine macroalgae is air dried and coarsely milled.
- the biomass of at least one species of red marine macroalgae is extracted into a liquid.
- biomass comprising bromoform requires careful processing to minimize the loss of the volatile bromoform, and maintain activity.
- the biomass comprising bromoform may be contacted with an animal manure in one of many ways.
- the biomass comprising bromoform can be contacted in a solid form, may be distributed in an excipient, and directly applied to the animal manure, may be physically mixed with an animal manure in a dry form, or the biomass comprising bromoform may be formed into a solution and thereafter sprayed onto an animal manure.
- the biomass comprising bromoform can be contacted in a liquid form, may be distributed in an excipient, and directly applied to the animal manure, may be physically mixed with an animal manure in a liquid form, or the biomass comprising bromoform may be formed into a solution and thereafter sprayed onto an animal manure.
- the method of contacting of the biomass comprising bromoform to an animal manure is considered to be within the skill of the artisan.
- the method comprises a method for reducing methane production from anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform, wherein the biomass comprising bromoform is a biomass of red marine macroalgae comprising more than one species of red marine macroalgae.
- the biomass of red marine macroalgae comprises one species of red marine macroalgae selected from the group consisting of Asparagopsis armata, Asparagopsis taxiformis, Bonnemaisonia hamifera and Bonnemaisonia asparagoides.
- the biomass of red marine macroalgae comprises more than one species of red marine macroalgae selected from the group consisting of Asparagopsis armata, Asparagopsis taxiformis, Bonnemaisonia hamifera and Bonnemaisonia asparagoides.
- the proportions can vary from less than 1 % to 99%, more advantageously from 25% to 75% and even more advantageously approximately 50% for each species.
- Asparagopsis biomass can effectively reduce methane production, relative to control, from anaerobic degradation of animal manure when Asparagopsis biomass is contacted with said animal manure at a level of at least 0.1% of organic matter of the manure.
- Asparagopsis biomass can effectively reduce methane production, relative to control, from anaerobic degradation of animal manure when Asparagopsis biomass is contacted with said animal manure at a level of at least 0.4 and 0.8% of organic matter of the manure.
- Figure 1 demonstrates that methane was undetectable with inclusion of 0.80% of organic matter.
- the present invention provides a method for reducing methane production from anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of biomass or extracted biomass comprising bromoform, wherein said effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.1% of organic matter of the manure.
- the biomass of red marine macroalgae is contacted with an animal manure at a dose of preferably at least 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1% of the organic matter of the animal manure.
- the biomass of red marine macroalgae is contacted with an animal manure at a dose of preferably at least 2, 3, 4, 5, 6, 7, 8, 9, or 10% of the organic matter of the animal manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.1% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.2% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.4% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.5% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.8% of organic matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 1% of organic matter of the manure.
- the biomass of red marine macroalgae is contacted with an animal manure at a dose of preferably at least 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1% of the dry matter of the animal manure.
- the biomass of red marine macroalgae is contacted with an animal manure at a dose of preferably at least 2, 3, 4, 5, 6, 7, 8, 9, or 10% of dry matter of the animal manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.1% of dry matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.2% of dry matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.4% of dry matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.5% of dry matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 0.8% of dry matter of the manure.
- the effective amount of biomass or extracted biomass is contacted with said animal manure at a level of at least 1% of dry matter of the manure.
- organic matter and dry matter refer to the amount of matter (on an organic or moisture-free basis, respectively) in an animal manure or including in the form of sewage sludge or septage. It is known in the art how to calculate organic matter and dry matter content of an animal manure.
- the % organic matter amount of the biomass comprising bromoform (e.g. biomass of Asparagopsis) is calculated. For example, if dried Asparagopsis biomass consists of 50% organic matter (OM), and if the desired level to be contacted with an animal manure is 0.1% Asparagopsis OM in an animal manure (e.g. 100 kg of an animal manure that is 80% organic matter), then 160g of Asparagopsis biomass consisting of 50% organic matter is required per 100 kg of an animal manure that is 80% organic matter.
- OM organic matter
- 160g of Asparagopsis biomass consisting of 50% organic matter is required per 100 kg of an animal manure that is 80% organic matter.
- the corresponding content of OM originating from biomass comprising bromoform can be calculated from different contents of organic matter (OM) %, or different contents of organic matter (OM) % of dry weight (dw).
- OM organic matter
- dw dry weight
- a content of organic matter (OM) of 50%, 55%, 60%, 70%, 75% or 80% etc. of dw based on previous data can be used to calculate the corresponding content of OM originating from Asparagopsis in the biomass.
- the % organic matter amount of the biomass comprising bromoform is calculated from the fresh weight of biomass.
- OM organic matter
- dry solids dry weight or dry weight refers to the total solids of a manure, including an animal manure in the form of a slurry, expressed in terms of % on a dry weight basis (% wt/wt).
- the biomass comprising bromoform (wherein the biomass is 100% OM) is contacted with the animal manure at a dose of about 8, 80, 160, 240, 320, 400, 480, 560, 640, 720 or 800 grams to result in a dose at about 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1 %, respectively, of the organic matter of the animal manure.
- the biomass comprising bromoform (wherein the biomass is 100% OM) is contacted with the animal manure at a dose of about 6, 60, 120, 180, 240, 300, 360, 420, 480, 540, or 600 grams to result in a dose at about 0.01 , 0.1 , 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1%, respectively, of the dry matter of the animal manure.
- the biomass of red marine macroalgae (wherein the biomass is 100% OM) is contacted with the animal manure at a dose of about 8, 80, 160, 240, 320, 400, 480, 560, 640, 720 or 800 grams to result in a dose at about 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1 %, respectively, of the organic matter of the animal manure.
- the biomass of red marine macroalgae (wherein the biomass is 100% OM) is contacted with the animal manure at a dose of about 6, 60, 120, 180, 240, 300, 360, 420, 480, 540, or 600 grams to result in a dose at about 0.01 , 0.1 , 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1%, respectively, of the dry matter of the animal manure.
- the “dose” or “doses” referred to herein refer to the amount of biomass to be contacted with an animal manure during a given period of contact, e.g. a day, a week or a month of contact.
- the biomass comprising bromoform may therefore be contacted with an animal manure (e.g. by adding a biomass comprising bromoform) at a regular interval, for example, every day, every other day, every other two days, etc., without departing from the scope of the invention.
- the biomass comprising bromoform (wherein the biomass is 100% OM) is contacted with the animal manure at a dose of about 8, 80, 160, 240, 320, 400, 480, 560, 640, 720 or 800 grams per day to result in a dose at about 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1% of the organic matter, respectively, of the animal manure per day.
- the doses defined herein - for example - as the amount per kg of manure refer to the average amount of the biomass comprising bromoform during a given period of contact, e.g. during a day, a week or a month of contact.
- the effective amount of biomass or extracted biomass comprising bromoform can be contacted with an animal manure in one or more doses.
- the effective amount of biomass or extracted biomass comprising bromoform can also be contacted with an animal manure in one or more doses on a daily basis.
- the present method may comprise administration of the biomass comprising bromoform in accordance with the above regimens for a period of at least 12, 24, 36, 48, 50, 72 hours, or 1, 2, 3, 4, 5, 6, 7, 14, 21, 28, 48, or 96 days.
- An aspect of the invention resides in the fact that the present methods provide effective reduction of methane over extended periods of contact.
- the present inventors have demonstrated that the amount of methane produced from anaerobic fermentation of animal manure is reduced by at least 65% with inclusion of biomass comprising bromoform at 0.20% of organic matter, compared to the amount of methane produced from control.
- the present inventors have also demonstrated that the amount of methane produced from anaerobic fermentation of animal manure is reduced by at least 90% with inclusion of biomass comprising bromoform at 0.40% of organic matter, compared to the amount of methane produced from control.
- the present inventors have also demonstrated that the amount of methane produced from anaerobic fermentation of animal manure is reduced to undetectable levels with inclusion of biomass comprising bromoform at 0.80% of organic matter, compared to the amount of methane produced from control.
- the amount of methane produced is reduced by at least 10, 20, 30, 40, 50, 60, 65, 70, 75, 80, 85, 90, or 95%, compared to a reference.
- the reference is the amount of methane produced when an animal manure is not contacted with an effective amount of at least one species of red marine macroalgae.
- the amount of methane produced by anaerobic fermentation in vitro is reduced by at least 96, 97, 98, 98.5 or 98.8% compared to the amount of methane produced when animal manure is not contacted with an effective amount of at least one species of red marine macroalgae.
- the mass of bromoform per mass of organic matter or dry matter of the biomass comprising bromoform is determined, and a desired concentration of bromoform in the contacted animal manure is used to calculate the amount of biomass comprising bromoform required to achieve the dose of bromoform.
- the biomass comprises bromoform at a level of 6.5mg of bromoform per g DW of biomass
- the biomass is 50% OM
- the desired dose or level of bromoform to be contacted with an animal manure is 26mg of bromoform per kg of the manure dry weight
- the biomass comprises bromoform at a level of 6.5mg of bromoform per g DW of biomass
- the biomass is 50% OM
- the desired dose or level of bromoform to be contacted with an animal manure is 26mg of bromoform per kg of the manure organic matter (and for the purposes of clarity only; assume the manure OM is 100% of DW)
- the present invention also provides an additive for reducing methane production from an animal manure, said additive comprising an effective amount of a biomass comprising bromoform.
- the biomass comprising bromoform is at least one species of red marine macroalgae.
- the species of red marine macroalgae is an Asparagopsis species.
- the species of Asparagopsis is A. taxiformis or A. Armata.
- the present invention provides an additive for reducing methane production from anaerobic degradation of monogastric animal manure, said additive comprising an effective amount of a biomass comprising bromoform.
- the biomass comprising bromoform is a biomass of red marine macroalgae, for example, wherein the red marine macroalgae is an Asparagopsis species and/or a Bonnemaisonia species.
- the species is selected from Asparagopsis armata, Asparagopsis taxiformis, Bonnemaisonia hamifera and Bonnemaisonia asparagoides.
- the term "additive” refers to a concentrated additive premix comprising the active ingredients (e.g. biomass comprising bromoform), which may be added to an animal manure.
- the additive of the present invention is in the form of a powder or compacted or granulated solid.
- the additive of the present invention is in the form of a liquid.
- the additive of the present invention is in the form of a liquid in which the biomass is present in or extracted into a liquid, such as an oil.
- the biomass can be included in the extract as whole biomass, or the biomass is an extracted biomass (e.g. an extract prepared from the biomass, wherein effective components are extracted from the biomass, and one or more non-effective components of the biomass are removed).
- the invention is not particularly limited in this respect.
- the biomass is an extracted biomass.
- the extracted biomass is biomass present in or extracted into a liquid.
- the extracted biomass is biomass extracted into a liquid, and one or more non-effective components of the biomass are removed.
- the extracted biomass is biomass extracted into a liquid, and the biomass is removed following extraction of the biomass into the liquid, thereby forming the extracted biomass.
- the liquid the biomass is extracted into is an oil.
- the oil is selected from the group consisting of almond oil, apricot oil, argan oil, avocado oil, brazil nut oil, canola oil, cashew oil, coconut oil, colza oil, corn oil, copra oil, cottonseed oil, diacylglycerol oil, flaxseed oil, grapefruit seed oil, grapeseed oil, hazelnut oil, hemp oil, lemon oil, linseed oil, macadamia oil, mustard oil, olive oil, orange oil, palm oil, palm kernel oil, peanut oil, pecan oil, pine nut oil, pistachio oil, pumpkin seed oil, rapeseed oil, rice bran oil, safflower oil, sesame oil, soybean oil, sunflower oil, walnut oil, and vegetable oil or any combination thereof.
- the present invention provides a process for preparing an extracted biomass, said process comprising the steps of: providing a biomass of Asparagopsis; and/or Bonnemaisonia ; providing at least one oil; and contacting the biomass with the at least one oil under conditions to extract at least one bioactive agent from the biomass into the at least one oil to form the extracted composition.
- the step of contacting the biomass with the at least one oil may include homogenising the biomass in the at least one oil.
- the biomass may be separated from the at least one oil after the step of contacting the biomass with the at least one oil.
- an additive according to the invention is contacted with an animal manure at a dose as calculated herein.
- the additive comprises said effective amount of biomass or extracted biomass formulated for contact with said animal manure at a level of at least 0.1% of organic matter of the manure.
- said effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.2% of organic matter of the manure.
- said effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.4% of organic matter of the manure.
- said effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.5% of organic matter of the manure.
- said effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 0.8% of organic matter of the manure. In another embodiment, said effective amount of biomass or extracted biomass is formulated for contact with said animal manure at a level of at least 1% of organic matter of the manure.
- the additive of the present invention may comprise any further ingredient without departing from the scope of the invention. It may typically comprise well-known excipients that are necessary to prepare the desired product form and it may comprise further additives aimed at improving a characteristic of the animal manure, such as the quality of an animal manure.
- the additive is used to contact a monogastric animal manure.
- the monogastric animal is selected from the members of the Suina suborder or the Galliformes order.
- the animal is a swine or a poultry.
- the present invention provides a method for reducing methane production from anaerobic degradation of animal manure comprising the step of contacting said manure with an effective amount of an additive as described herein.
- the present inventors have demonstrated anaerobic degradation of animal manure in contact with an effective amount of a biomass comprising bromoform in a system comprising a reactor vessel (e.g. Example 1 and Example 3).
- the present invention provides a system for the digestion of an animal manure.
- the present invention provides a system for the anaerobic digestion of an animal manure.
- the system comprises a bioreactor or digester.
- an animal manure is the substrate for digestion in a system for the digestion of an animal manure, and the manure comprises the components (including macro and micro nutrients) required for anaerobic degradation.
- an animal manure is the substrate for digestion in a system for the digestion of an animal manure, and the manure comprises the components (including macro and micro nutrients) required for anaerobic methanogenesis.
- an animal manure is the substrate for digestion in a system for the digestion of an animal manure, and the manure comprises the components (including macro and micro nutrients) required for microbial growth.
- the manure can be used in (e.g. fed into) the system (e.g. bioreactor) repeatedly during the degradation process, such as once, twice, or three times a day.
- the system e.g. bioreactor
- the system comprises the use of at least one anaerobic fermentative organism, such as methanogenic microorganism, for the anaerobic digestion of an animal manure.
- at least one anaerobic fermentative organism such as methanogenic microorganism
- the at least one anaerobic fermentative organism is provided in the animal manure fed into the system.
- the at least one anaerobic fermentative organism is provided in an anaerobic inoculum fed into the system.
- the at least one anaerobic fermentative organism is provided in the system into which the animal manure is fed, for example, in an anaerobic sludge present in the system into which the animal manure is fed.
- the system is maintained at a temperature permissive of methanogenesis, such as a psychrophilic (15 to 25°C), mesophilic (30 to 38°C), and thermophilic (50 to 60°C), temperature.
- a temperature permissive of methanogenesis such as a psychrophilic (15 to 25°C), mesophilic (30 to 38°C), and thermophilic (50 to 60°C), temperature.
- these temperatures/temperature ranges facilitate the growth of specific microbes.
- the pH of the system is maintained at a pH permissive of anaerobic degradation.
- the pH of the system is maintained at a pH permissive of methanogenesis.
- the pH in the system is maintained below 8.3. In another embodiment, the pH in the system is maintained below 8.0.
- the system comprises a reactor vessel. In one embodiment the reactor vessel is a chamber to allow anaerobic degradation of an animal manure in contact with a biomass comprising bromoform.
- the system comprises an inlet for addition of manure and a chamber to allow anaerobic degradation of an animal manure in contact with a biomass comprising bromoform.
- the bioreactor comprises an outlet for treated manure.
- the bioreactor comprises an outlet for gas produced in the bioreactor.
- the present invention provides a treated manure produced by the methods and/or the systems described herein.
- EXAMPLE 1 Contacting biomass comprising bromoform with manure in vitro significantly reduces methane production.
- Asparagopsis was used as an example of biomass comprising bromoform (see Example 2), to examine the effect of biomass containing biomass on biogas production from animal manure.
- the red seaweed Asparagopsis taxiformis in the filamentous gametophyte phase was collected from a site near Humpy Island, Keppel Bay, Qld (23o13’01”S, 150o54 ⁇ T ⁇ ) by MACRO (Center for Macroalgal Resources and Biotechnology) of James Cook University (JCU) in Townsville, QLD.
- the collected biomass was frozen and stored at - 15°C then shipped to Forager Food Co. (Red Hills, TAS), where it was freeze dried to approximately 95% dry matter to retain volatile bioactive compounds.
- the dried Asparagopsis biomass consisting of 50% OM was milled (2-3 mm) to ensure a uniform product.
- the biomass was added directly to fresh manure collected from the rectum of grain fed feedlot cattle at rates of approximately 0.0, 0.20, 0.40, and 0.80% of the manure organic matter.
- the Asparagopsis taxiformis biomass contained approximately 6.5mg of bromoform per g DW of Asparagopsis. Therefore, when added at 0.2% OM of the manure organic matter, 4 grams of biomass is added per kg of manure organic matter.
- EXAMPLE 2 Halogenated metabolites in Asparagopsis taxiformis and Asparagopsis armata
- Figure 2 demonstrates biomass of wild Asparagopsis taxiformis in the benthic gametophyte phase collected from a site near Humpy Island, Keppel Bay contains the halogenated metabolite bromoform, and that Asparagopsis taxiformis and Asparagopsis armata contain similar levels of bromoform.
- EXAMPLE 3 Contacting biomass comprising bromoform with monogastric manure in vitro significantly reduces methane production.
- TGP Total gas production
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Abstract
La présente invention concerne un procédé et des additifs pour la production de fumier animal traité.
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