CN105861379B - A kind of dry preparation algae powder method of free from extraneous odour cyanobacteria - Google Patents
A kind of dry preparation algae powder method of free from extraneous odour cyanobacteria Download PDFInfo
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- CN105861379B CN105861379B CN201610320972.8A CN201610320972A CN105861379B CN 105861379 B CN105861379 B CN 105861379B CN 201610320972 A CN201610320972 A CN 201610320972A CN 105861379 B CN105861379 B CN 105861379B
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- 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
- C12N1/20—Bacteria; Culture media therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/306—Organic sulfur compounds, e.g. mercaptans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a kind of dry preparation algae powder methods of free from extraneous odour cyanobacteria, belong to technical field of drying.The method of the present invention is divided into cyanobacteria drying nest and tail gas deodorization part.The method according to the invention, algae powder moisture content is not more than 10%, protein content is more than or equal to 30%, and content of ashes is less than or equal to 50%, can remove the features odor pollutants such as the different borneol of native monosodium glutamate, dimethyl disulfide, dimethyl, dimethyltrisulfide, phenol, methyl indol.Compared with low temperature is dry for a long time, the generation of cyanobacteria malodor molecule can not only be greatly lowered in rapid draing, additionally it is possible to which the quality for guaranteeing blue-green algae dry powder reduces the loss of protein content.Therefore, the present invention has many advantages, such as that less energy consumption, operating cost are low, and can effectively reduce the malodor molecule amount generated in cyanobacteria drying.
Description
Technical field
The present invention relates to a kind of dry preparation algae powder methods of free from extraneous odour cyanobacteria, belong to technical field of drying.
Background technique
Currently, high temperature evaporation drying process is widely used in industrial production, such as: the spray drying of yeast industry, fertilizer
Industry product high temperature drying, the drying of the pharmaceutical industry dregs of a decoction etc., the common feature of these techniques is: while moisture is evaporated,
Raw material rich in organic matter under the high temperature conditions organic cracking at the volatile small-molecule substance VOCs with peculiar smell (stench)
(volatile organic matter) or SVOCs (semi-volatile organic matter) temperature is higher, and peculiar smell is stronger.
Cyanobacteria can also generate volatile odorous compound in the drying process, and odorous compound is produced by algae mostly
Volatile secondary metabolite, it is lead to smell substance main that cyanobacteria, which rots to decompose the organic compounds containing sulfur generated,
Reason.For algae in decomposable process, volatile substances are mainly dimethyl amine, dimethyl disulfide, dimethyltrisulfide and diformazan
The nitrogenous smell substance of the sulfur-bearings such as four sulphur of base.In decomposable process, these four compounds show the trend for first increasing and reducing afterwards,
And its maximum value occurs more early as temperature increases.The generation of these smell substances not only reduces the quality of algae powder, and
And it also polluted atmospheric environment.
Summary of the invention
Aiming at the problem that above-mentioned cyanobacteria exists in the drying process, the present invention provides a kind of dry preparations of free from extraneous odour cyanobacteria
The method of algae powder, to reduce the stench amount that cyanobacteria generates in the drying process.Cyanobacteria discharges smell substance in the drying process
The amount of the features odor pollutants such as amount, such as native monosodium glutamate, dimethyl disulfide, the different borneol of dimethyl, dimethyltrisulfide, phenol, and it is dry
Dry time and drying temperature are closely related, therefore control drying time and drying temperature is particularly important.
The object of the present invention is to provide a kind of dry preparation algae powder methods of free from extraneous odour cyanobacteria, and it is dry that the method includes cyanobacterias
Part and tail gas deodorization part；Wet cyanobacteria material is dry in host, and the residence time of material is 5~30s, and drying temperature is
220~280 DEG C；Tail gas is sent into biological deodorizing system, first passes through pretreatment unit, using bio-trickling unit, finally passes through
Biological oxidation unit is sent to exhaust tube by blower and is discharged.Compared with existing low temperature slow curing is dry, it can guarantee that algae amyloid proteins matter contains
Amount and the yield for reducing foul smell.
In one embodiment of the invention, the wet cyanobacteria material is the algal gel of moisture content 60%~95%.
In one embodiment of the invention, the cyanobacteria drying nest is using hot-blast stove heat supply, and hot fume is by rousing
Blower is sent into host, and wet cyanobacteria is dry with being pumped into host, blue after one cyclonic machine and bag filter rewinding dedusting
Algae enters material cooling, packaging system through Blowing stopper, and tail gas enters biological deodorizing system.
In one embodiment of the invention, the hot-blast stove is direct-fired combustion gas (oil) hot-blast stove.
In one embodiment of the invention, the tail gas is first sent to life by air-introduced machine after waste heat exchanging air takes heat
Object deodoration system.
In one embodiment of the invention, the biological deodorizing system, including pretreatment unit and biological oxidation dress
It sets；Biological oxidation apparatus includes bio-trickling unit and biological oxidation unit.
In one embodiment of the invention, the pretreatment unit, top contain sprinkler part, are intermediate for biology load
Body packing layer, bottom are pond；It collects and the contaminated off-gas of transmission enters pretreatment unit from bottom, in the mistake by packing layer
The abundant counter current contact of Cheng Zhongyu spray liquid, the grit in gas, mist of oil and part H2S, the hydrophilies gas componant such as ammonia is adsorbed
Or it is soluble in water, and as spray liquid is deposited in bottom of device pond.Gas enters biological oxidation dress through piping from top
The bio-trickling unit set.
In one embodiment of the invention, the bio-trickling unit, gas are entered by bio-trickling unit lower part,
It is adequately contacted with by the bio-trickling medium of circulated sprinkling.Hydrophily pollutant component in foul smell is partially filtered by drop
Microbe from adhering group on medium captures digestion, and another part then dissolves and as drop filtrate falls into reservoir, reservoir
In containing a large amount of planktons thoroughly biodegrade will be carried out to the polluter that captures.In the process, as vulcanized
Hydrogen, the water-soluble pollutant component such as ammonia will obtain higher removal.Humidified treated gas is from bio-trickling unit
Portion's discharge, into the biological oxidation unit of biological oxidation apparatus.
In one embodiment of the invention, the biological oxidation unit, gas enter biological oxidation unit from bottom
It is come into full contact with the Biomedia ball periodically humidified.Hydrophobic contact scar component is by micropopulation in medium and micro- life in gas
Object metabolite is captured, adsorbed and further biodegrade.The stenches such as organic sulfur larger molecular weight, water-soluble poor chemical combination
Object carries out effective biodegrade in biological oxidation unit, this process, can in the case where polluted gas has enough residence times
Realization maximumlly removes hydrophobic contaminant matter.Generated native monosodium glutamate, dimethyl disulfide, dimethyl after dry to cyanobacteria
The absorption efficiency of the features odorant such as different borneol reaches 98%, and odor concentration (dimensionless) is lower than 2000, reaches first grade discharging
Standard.Treated, and gas is sent through blower to the organized high altitude discharge of 20~30m exhaust tube progress by oxidation unit top.
In one embodiment of the invention, bio-trickling unit and biological oxidation unit use bio-carrier,
Make the design of filler load height to be increased, the touch opportunity between gas and medium is increased, to effectively extend micro-
Residence time required for biodegradable pollutant further improves system to the degradation effect of pollutant.
Beneficial effects of the present invention:
(1) present invention is the yield for reducing stench in drying process by establishing rapid draing.It is according to the invention
Method, the algal gel of moisture content 60%~95% are not more than 10%, protein by being dried the standby algae powder moisture content of unit style
Content is more than or equal to 30%, content of ashes and is less than or equal to 50%, achieves the desired results.Compared with low temperature is dry for a long time, this hair
The generation of cyanobacteria malodor molecule can not only be greatly lowered in bright rapid draing, moreover it is possible to reduce the loss of protein content.
(2) using the dry algal gel of method of the invention, the time most can reach 5s fastly.Drying process is rapid draing, material
5~30s of residence time, drying temperature are 220~280 DEG C, and moisture is dried to 10% hereinafter, rapid draing institute from 60%~95%
The dimethyl disulfide concentration of generation is 0.01~0.02mg/m3, protein content is 30%~40%.
It (3) is collection bio-trickling unit according to biological deodorizing system of the present invention (mainly for the treatment of hydrophily pollutant)
With two kinds of biological processing units of biological oxidation unit (mainly for the treatment of hydrophobic contaminant) in the combination method of one.It is right
The absorption efficiency of the features odorant such as generated native monosodium glutamate, dimethyl disulfide, the different borneol of dimethyl reaches after cyanobacteria is dry
98%, odor concentration (dimensionless) is lower than 2000, and gas discharge reaches national odorant pollutant discharge primary standard.
Detailed description of the invention
Fig. 1 is system composition schematic diagram of the invention；
Fig. 2 is foul gas biological oxidation process flow chart；
Fig. 3 be 280 DEG C under the conditions of dimethyl disulfide concentration with drying time variation diagram；
Fig. 4 is the variation diagram for the odor concentration that cyanobacteria generates under different drying times；
Fig. 5 is cyanophycin content change diagram under different drying times.
Specific embodiment
The method of the present invention is divided into cyanobacteria drying nest and tail gas deodorization part.
Concrete technology flow process are as follows: direct-fired combustion gas (oil) hot-blast stove heat supply, hot fume are sent into host by air blower.Wet indigo plant
Algae is dry with being pumped into host, heat transfer, mass transfer, 5~30s of residence time of material, most afterwards through one cyclonic machine and bag-type dust
After device rewinding dedusting, cyanobacteria enters material cooling, packaging system through Blowing stopper, and tail gas is first by air inducing after waste heat exchanging air takes heat
Machine is sent to biological deodorizing system, first passes through pretreatment, using bio-trickling unit, finally passes through biological oxidation unit, by
Blower send to 20~30m exhaust tube and carries out organized high altitude discharge.
Pretreatment unit, sprinkler part is contained at top, centre is packing layer, bottom is pond；The pollution collected and transmitted
Tail gas carries out pretreatment unit from lower part or bottom, abundant with spray liquid during passing through packing layer by packing layer
Counter current contact, the grit in gas, mist of oil and part H2S, the hydrophilies gas componant such as ammonia absorption or soluble in water, and with
Spray liquid is deposited in bottom of device pond.Gas enters the bio-trickling unit of biological oxidation apparatus from top through piping.
Gas is entered by bio-trickling unit lower part, is adequately connect with by the bio-trickling medium of circulated sprinkling
Touching.Hydrophily pollutant component in foul smell partially captures digestion by the microbe from adhering group on drop filter medium, and another part is then
Dissolve simultaneously with drop filtrate fall into reservoir, in reservoir containing a large amount of planktons by the polluter captured into
Row thoroughly biodegrade.In the process, such as hydrogen sulfide, the water-soluble pollutant component such as ammonia will obtain higher removal.
Humidified treated gas is discharged from bio-trickling unit top, into the biological oxidation unit of biological oxidation apparatus.
Gas enters biological oxidation medium layer from bottom, is come into full contact with the Biomedia ball periodically humidified.Gas
In hydrophobic contact scar component captured, adsorb by micropopulation in porous media and medium and microbial metabolic products and further
Biodegrade.The stenches such as organic sulfur larger molecular weight, water-soluble poor compound are effectively given birth in biological oxidation unit
Object degradation, this process is in the case where polluted gas has enough residence times, it can be achieved that maximized to hydrophobic contaminant matter
Removal.To the absorption effect of cyanobacteria features odorant such as generated native monosodium glutamate, dimethyl disulfide, the different borneol of dimethyl after dry
Rate reaches 98%, and odor concentration (dimensionless) is lower than 2000, reaches first discharge standard.Treated gas is by oxidation unit
It send through blower to 20~30m exhaust tube and carries out organized high altitude discharge in portion.
Wherein, bio-carrier is respectively adopted in bio-trickling unit and biological oxidation unit, and it is high by one as far as possible to load height
A bit, increase the touch opportunity between gas and medium, thus when stopping required for effectively extending microbial degradation pollutant
Between, to further increase system to the degradation effect of pollutant.
Protein content height (about 20%~50%) in cyanobacteria, therefore the selection of drying condition is especially important.Rapid draing
Generated dimethyl disulfide concentration is 0.01~0.02mg/m3, protein content is 30%~40%；When long using low temperature
Between it is dry when (100~300s of drying time, drying temperature be 100 DEG C) generation dimethyl disulfide concentration be 5.2~7.5mg/
m3, protein content is 10%~20%.Compared with low temperature is dry for a long time, (5~30s of time is done for rapid draing of the invention
Dry temperature is 220~280 DEG C) generation of cyanobacteria malodor molecule can not only be greatly lowered, moreover it is possible to reduce the damage of protein content
It loses.During drying, it can generate and mainly contain effumability object as native monosodium glutamate, hydrogen sulfide, ammonia, dimethyl amine, diformazan
The nitrogenous smell substances of sulfur-bearings such as four sulphur of two sulphur of base, dimethyltrisulfide and dimethyl.More than low temperature long-time drying can not only generate
Substance, but also the odor pollutants such as p-methyl phenol, methyl indol can be generated.
Invention is further explained With reference to embodiment.
Embodiment 1:
In order to obtain 1t moisture content be 7% algae powder, respectively by moisture content be 60%, 70%, 80%, 90% algal gel into
Row be dried, drying temperature be 280 DEG C, learnt by experimental test, the algal gel consumed respectively be 2.325t, 3.1t,
4.65t, 9.33t, evaporation water are respectively 1.325t, 2.1t, 3.65t, 8.33t, and residence time of material is respectively 6s, 15s,
25s, 50s, protein content are respectively 48%, 44%, 41%, 36%, and content of ashes is respectively 18%, 20%, 28%,
45%, the odor concentration (dimensionless) generated after dry is 3260,4050,4400,6500, after deodoration system is handled, is measured
Odor concentration is 260,950,1200,2000, and tail gas is discharged through 30m height exhaust tube, and meeting GB14554-93, " stench is dirty
Contaminate object discharge standard ".
Embodiment 2:
The cyanobacteria material that 10t moisture content is 85% is dried with being pumped into main drying, hot fume is by air blower
It is sent into host, drying temperature is set as 260 DEG C, and cyanobacteria is dried in it, conducts heat, mass transfer, most afterwards through one cyclonic machine
After bag filter rewinding dedusting, material enters material cooling, packaging system through Blowing stopper, and the tail gas of generation enters biology and removes
Smelly system is handled.
By setting residence time of material as 30s, by detecting to the material after drying, measuring moisture content is 8%,
Protein content is 40%, content of ashes 30%.
To the Exhaust measurement generated after drying, using the dimethyl disulfide of generation as detection project, surveyed in 30m exhaust tube
Fixed, concentration 0.5kg/h, gas discharge standard meets GB14554-93 " emission standard for odor pollutants ".
Embodiment 3:
Equally the cyanobacteria that 10t moisture content is 85% is dried, drying temperature is set as 240 DEG C, residence time of material
It is set as 100s, by detecting to the material after drying, measuring moisture content is 10%, protein content 25%, ash content
Content is 40%.
The tail gas generated after drying is measured, equally using dimethyl disulfide as detection project, is carried out in 30m exhaust tube
Measurement, concentration 1.9kg/h, gas discharge do not meet GB14554-93 " emission standard for odor pollutants ".
Embodiment 4:
The cyanobacteria that 10t moisture content is 85% is dried, drying temperature is set as 100 DEG C, and residence time of material is
300s detects the algae powder generated after drying, show that moisture content is 12%, protein content 15%, and content of ashes is
50%, the odor concentration (dimensionless) generated after dry is 15000, and the dimethyl disulfide concentration of generation is 7.5mg/m3。
Embodiment 5:
The cyanobacteria that 10t moisture content is 90% is dried, drying temperature is set as 280 DEG C, residence time of material difference
It is set as 10s, 20s, 30s, 100s, 170s, 240s, the tail gas generated after drying is measured.Wherein two under the conditions of 280 DEG C
Two sulphur concentration of methyl is as shown in Figure 3 with the variation of drying time.In addition, very big change occurs for foul gas ingredient since 100s
Change, produces the odor pollutants such as p-methyl phenol, methyl indol.And with the growth of residence time of material, protein content
(Fig. 5) difference 45%, 43%, 40%, 25%, 20%, 15%.
Embodiment 6:
The cyanobacteria that 10t moisture content is 90% is dried, drying temperature is set as 220 DEG C, residence time of material difference
It is set as 10s, 20s, 30s, 100s, 170s, 240s, to treated that odor concentration (dimensionless) is surveyed by deodoration system
Fixed (Fig. 4), obtains under different drying times, odor concentration is respectively 300,1000,2000,7000,13000,20000.
Thus data can obtain, and with the growth of drying time, odor concentration is sharply increased, therefore drying time is outstanding to the yield of foul smell
It is important.
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the invention, any to be familiar with this skill
The people of art can do various change and modification, therefore protection model of the invention without departing from the spirit and scope of the present invention
Enclosing subject to the definition of the claims.
Claims (3)
1. a kind of dry preparation algae powder method of free from extraneous odour cyanobacteria, which is characterized in that the method includes cyanobacteria drying nest, be by
Wet cyanobacteria material is dry in host, and the residence time of material is 5~30s, and drying temperature is 220~280 DEG C；The method is also
Including tail gas deodorization part, tail gas is sent into biological deodorizing system, first passes through pretreatment unit, using bio-trickling unit, most
Afterwards by biological oxidation unit, is sent by blower to exhaust tube and discharged；Contain sprinkler part, centre in the top of the pretreatment unit
It is pond for bio-carrier layer, bottom；It collects and the contaminated off-gas of transmission enters pretreatment unit from bottom, by filling out
With the abundant counter current contact of spray liquid during the bed of material, grit, mist of oil and the absorption or molten of hydrophily gas componant in gas
Yu Shuizhong, and as spray liquid is deposited in bottom of device pond；Gas enters biological oxidation apparatus through piping from top
Bio-trickling unit；The bio-trickling unit, gas are entered by bio-trickling unit lower part, with the biology by circulated sprinkling
Drop filter medium is adequately contacted；Hydrophily pollutant component in foul smell, partially by the microbe from adhering group on drop filter medium
Digestion is captured, another part then dissolves and as drop filtrate falls into reservoir, and a large amount of planktons are contained in reservoir
Biodegrade will be carried out to the polluter captured；Treated, and gas is discharged from bio-trickling unit top, into biology
The biological oxidation unit of oxidation unit；The biological oxidation unit, gas enter biological oxidation unit from bottom, with regular humidification
Biomedia ball come into full contact with；Treated gas by oxidation unit top through blower send to 20~30m exhaust tube into
The organized high altitude discharge of row.
2. the method according to claim 1, wherein the wet cyanobacteria material is the algae of moisture content 60%~95%
Mud.
3. the method according to claim 1, wherein the cyanobacteria drying nest, is using hot-blast stove heat supply, heat
Flue gas is sent into host by air blower, and wet cyanobacteria is dry with being pumped into host, through one cyclonic machine and bag filter rewinding
After dedusting, cyanobacteria enters material cooling, packaging system through Blowing stopper, and tail gas enters biological deodorizing system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021009210A1 (en) * | 2019-07-15 | 2021-01-21 | Agroils Technologies S.P.A. | Formaldehyde-free binders and methods for producing the same |
| IT201900014370A1 (en) * | 2019-08-08 | 2021-02-08 | Agroils Tech S P A | FORMALDEHYDE-FREE BINDING COMPOUNDS AND METHODS FOR PRODUCING THEM |
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| CN114307589A (en) * | 2021-12-07 | 2022-04-12 | 重庆宏锐环保科技发展有限公司 | Sewage peculiar smell treatment method based on environmental engineering remediation |
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