CN104017834B - Method for producing volatile fatty acid (VFA) through facultative anaerobic fermentation of kitchen waste - Google Patents
Method for producing volatile fatty acid (VFA) through facultative anaerobic fermentation of kitchen waste Download PDFInfo
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- CN104017834B CN104017834B CN201410281875.3A CN201410281875A CN104017834B CN 104017834 B CN104017834 B CN 104017834B CN 201410281875 A CN201410281875 A CN 201410281875A CN 104017834 B CN104017834 B CN 104017834B
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- food waste
- changing food
- fatty acid
- kitchen waste
- volatile fatty
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- 238000000855 fermentation Methods 0.000 title claims abstract description 23
- 235000014113 dietary fatty acids Nutrition 0.000 title claims abstract description 21
- 229930195729 fatty acid Natural products 0.000 title claims abstract description 21
- 239000000194 fatty acid Substances 0.000 title claims abstract description 21
- 150000004665 fatty acids Chemical class 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000010806 kitchen waste Substances 0.000 title abstract 8
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 230000004151 fermentation Effects 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000008187 granular material Substances 0.000 claims abstract description 7
- 238000010298 pulverizing process Methods 0.000 claims abstract 2
- 239000010794 food waste Substances 0.000 claims description 43
- 210000004243 sweat Anatomy 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 230000003519 ventilatory effect Effects 0.000 claims description 5
- 238000011081 inoculation Methods 0.000 claims 1
- 230000007062 hydrolysis Effects 0.000 abstract description 10
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 230000029087 digestion Effects 0.000 abstract description 4
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000009423 ventilation Methods 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 4
- 241001148470 aerobic bacillus Species 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 description 2
- 235000019260 propionic acid Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229940005605 valeric acid Drugs 0.000 description 2
- XYHKNCXZYYTLRG-UHFFFAOYSA-N 1h-imidazole-2-carbaldehyde Chemical compound O=CC1=NC=CN1 XYHKNCXZYYTLRG-UHFFFAOYSA-N 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-M 3-Methylbutanoic acid Natural products CC(C)CC([O-])=O GWYFCOCPABKNJV-UHFFFAOYSA-M 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 230000004103 aerobic respiration Effects 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N beta-methyl-butyric acid Natural products CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- KQNPFQTWMSNSAP-UHFFFAOYSA-N isobutyric acid Chemical compound CC(C)C(O)=O KQNPFQTWMSNSAP-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for producing volatile fatty acid (VFA) through facultative anaerobic fermentation of kitchen waste. The method comprises the steps of pulverizing the kitchen waste into granules of which the diameters are less than 3mm, adding strains according to the volume ratio of the strains to the kitchen waste of 1: (1.5-2), adjusting the water content of the inoculated kitchen waste to 88-91%, mixing uniformly, performing the facultative anaerobic fermentation on the uniformly mixed kitchen waste at 34-37 DEG C, and adjusting process parameters according to the fermentation concentration. By adopting the method disclosed by the invention for hydrolyzing the kitchen waste, the time is short, the yield of VFA is high, and the hydrolysis rate is high; the kitchen waste can be efficiently recycled through the process for preparing marsh gas through anaerobic digestion after hydrolysis.
Description
Technical field
The invention belongs to changing food waste into resources process field is and in particular to a kind of changing food waste amphimicrobian fermentation product is waved
The property sent out fatty acid（VFA）Method.
Background technology
Changing food waste occupies larger proportion in China's domestic waste, reaches 40% ~ 60%, and sends out with social
Exhibition, the yield of changing food waste also increases year by year.Changing food waste has that moisture content is high, content of organics is high, easy to be corrupt the features such as,
As dealt with improperly, necessarily cause the waste of resource and the pollution of environment.Therefore, how changing food waste is carried out with minimizing, harmless
Change, recycling treatment has become question of common concern.
Process to changing food waste and resource, the skill such as commonly used landfill, compost, anaerobic fermentation, fodder both at home and abroad
Art approach.Wherein, anaerobic digestion methane production technology is widely used because obtaining energy substance and organic fertilizer.Anaerobism disappears
Change and generally comprise hydrolysed ferment, hydrogenesis and acetogenesis, 3 stages of methane phase.In the hydrolysed ferment stage, insoluble macromole is organic
Thing is first converted into the small organic molecule that can be utilized by antibacterial, afterwards in the presence of zymogenous bacteria, is converted into long-chain
The materials such as fatty acid, saccharide, aminoacid, ultimately form with short chain volatile organic acid (acetic acid, propanoic acid, butanoic acid, valeric acid, caproic acid
Deng), the end based on ethanol.
But anaerobic digestion in prior art is produced volatile fatty acid to there is the hydrolysed ferment time long, is typically not less than 5 days,
Fatty acid yield is high not enough, the low defect of hydrolysis efficiency.As " improved rubbish from cooking anaerobic digestion hydrolysis acidification stage volatility
The technical research of fatty acid yield, Shanghai Communications University's master thesis. Wang Qi " disclosed in the yield of VFA be up to
31.2g.L-1, its VFA daily output is about 6.24g.Ld-1；The method needs to maintain pH value=7, and ferments for batch-type, and technique is slightly
Loaded down with trivial details.It is about 6.5 g.Ld using this method VFA daily output-1, and it is not required to control ph, this method is continuous fermentation, and technique exists
Application in engineering is more handling.
Content of the invention
The purpose of the present invention is the problem existing for prior art, provides a kind of degradation time short, volatile fatty acid
Yield is high, the method that volatile fatty acid is produced in the high changing food waste amphimicrobian fermentation of hydrolysis efficiency.The method is by kitchen rubbish
Rubbish is crushed to the granule that particle diameter is 3mm, is 1 by strain and changing food waste volume ratio:The ratio of 1.5-2 adds strain, and regulation connects
Changing food waste water content after kind is to 88-91%, and fully mixes, and the changing food waste after mixing is carried out under the conditions of 34-37 DEG C
Amphimicrobian ferments.
The present invention takes amphimicrobian to ferment, and intermittent oxygen supply can promote oxygen hydrolysis flora balancedly to breed, production capacity,
The more efficient generation volatile fatty acid of facultative anaerobe energy.And prior art adopts strictly anaerobic to ferment substantially, in anaerobism bar
Under part, the efficiency of the product volatile fatty acid of anaerobic bacteria flora is less than aerobic bacteria and facultative anaerobe.Using method of the present invention fall
Solution changing food waste, has the advantages of degradation cycle is short, and VFA yield is high, percent hydrolysiss are high.
Preferably, described changing food waste be restaurant, the leftover that provides of dining room or family and/or dish leaf.
Preferably, described strain is municipal sewage system and/or sewage treatment plant is taken mud.
Preferably, in described amphimicrobian sweat, when changing food waste water content is 88-89%, air is passed through
Measure as 0.65-1m3/m2, ventilatory cycle is 11-12min/h, and mixing speed is 80-90r/min；When changing food waste water content is
During 90-91%, air intake is 0.3-0.65m3/m2, ventilatory cycle is 9-10min/h, and mixing speed is 60-70r/min.
Ventilation described herein refers to the air body accumulated amount that the changing food waste of per unit area is passed through, ventilatory cycle refer to per hour to
Changing food waste is passed through the time of air.The be passed through air circle and ventilation of the present invention are more suitable, appropriate oxygen energy
Enough meet the growth needs of aerobic flora, promote flora to carry out aerobic respiration amount reproduction under aerobic environment and produce higher energy
Amount；But excessive oxygen supply can lead to rapidly grow using the aerobic flora of volatile fatty acid, volatile fatty acid is caused to produce
Rate is low, and simultaneously excessive oxygen supply also can suppress the growth of amphimicrobian flora.The mixing speed adopting in the present invention is more
When suitably, less than setting speed, stirring is not abundant, and oxygen can not be fully contacted with fermentation liquid；When mixing speed is too fast,
Microorganism species " microecological balance " can be destroyed, thus reducing hydrolysis efficiency.
Preferably, described amphimicrobian fermentation period is 2-3d, and fermentation period is too short, and hydrolysis is insufficient, increases subsequently to locate
The burden of reason；Excessive cycle can increase hydrolysis process burden, and volatile fatty acid can be degraded by other aerobic bacterias simultaneously, after causing
Phase application substrate runs off.
Specific embodiment
Below by embodiment, the present invention is specifically described it is necessary to it is pointed out here that be following examples be use
In being further detailed it is impossible to be interpreted as limiting the scope of the invention to the present invention, being skilled in technique of this field
Personnel made according to foregoing invention content some nonessential improve and adjust, still fall within protection scope of the present invention.
Due to the composition difference of regional changing food waste, the changing food waste that the present embodiment and comparative example are adopted is Sichuan
The changing food waste saving certain Chinese-style restaurant is fermentation raw material.
Embodiment 1
Food waste powder is broken to the granule that particle diameter is 3mm, takes urban sewer sludge as strain, by strain and meal
Kitchen garbage bulk is than for 1:1.5 ratio adds strain, and the postvaccinal changing food waste water content of regulation that adds water is 88%, and fully
Mix, the changing food waste after mixing is carried out amphimicrobian fermentation under conditions of 34 DEG C, in sweat, is passed through air circle
For 11 min/h, ventilation is 0.7 m3/m2, ventilate and stir, mixing speed is 80 r/min, fermentation period is 2d.
Embodiment 2
Food waste powder is broken to the granule that particle diameter is 3mm, takes the mud of sewage treatment plant as strain, by strain with
Changing food waste volume ratio is 1:1.5 ratio adds strain, and the postvaccinal changing food waste water content of regulation that adds water is 89%, and fills
Divide and mix, the changing food waste after mixing is carried out amphimicrobian fermentation under conditions of 35 DEG C, in sweat, be passed through air week
Phase is 12 min/h, and ventilation is 0.9 m3/m2, ventilate and stir, mixing speed is 90 r/min, fermentation period is
2d.
Embodiment 3
Food waste powder is broken to the granule that particle diameter is 3mm, takes the mud of sewage treatment plant as strain, by strain with
Changing food waste volume ratio is 1:1.5 ratio adds strain, and the postvaccinal changing food waste water content of regulation that adds water is 91%, and fills
Divide and mix, the changing food waste after mixing is carried out amphimicrobian fermentation under conditions of 37 DEG C, in sweat, be passed through air week
Phase is 10 min/h, and ventilation is 0.5 m3/m2, ventilate and stir, mixing speed is 70 r/min, fermentation period is
2.5d.
Embodiment 4
Food waste powder is broken to the granule that particle diameter is 3mm, takes the mud of sewage treatment plant as strain, by strain with
Changing food waste volume ratio is 1:1.5 ratio adds strain, and the postvaccinal changing food waste water content of regulation that adds water is 92%, and fills
Divide and mix, the changing food waste after mixing is carried out amphimicrobian fermentation under conditions of 37 DEG C, in sweat, be passed through air week
Phase is 9 min/h, and ventilation is 0.3 m3/m2, ventilate and stir, mixing speed is 60 r/min, fermentation period is
2.5d.
Comparative example 1
With the difference of embodiment 1, operation is in sweat that ventilation is 1.2 m3/m2, being passed through air circle is
14min, mixing speed is 100 r/min, and remaining step is same as Example 1.
Comparative example 2
With the difference of embodiment 2, operation is in sweat that ventilation is 0.5 m3/m2, being passed through air circle is 8min,
Mixing speed is 70 r/min, and remaining step is same as Example 2.
Comparative example 3
With the difference of embodiment 3, operation is in sweat that ventilation is 0.8 m3/m2, being passed through air circle is 12
Min, mixing speed is 80 r/min, and remaining step is same as Example 3.
Comparative example 4
With the difference of embodiment 4, operation is in sweat that ventilation is 0.2 m3/m2, being passed through air circle is 7min,
Mixing speed is 50 r/min, and remaining step is same as Example 4.
The mensure of volatile fatty acid：Using the test of Agilent 7890A gas chromatograph.J＆W123-3232 capillary column,
Carrier gas：N2, combustion gas：H2, 80-180 DEG C of degree intensification（1-7min）；Injector temperature：250℃；Detector：FID, 250 DEG C；
Sample size：2μl.Test composition includes ethanol, acetic acid, propanoic acid, isopropylformic acid., butanoic acid, isovaleric acid, valeric acid.
Table 1 embodiment 1-4 is contrasted with comparative example's 1-4 volatile fatty acid yield
| Group | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| VFA yield（g.Ld-1） | 6.31 | 7.25 | 6.51 | 6.75 | 5.82 | 3.98 | 4.76 | 4.01 |
Claims (4)
1. a kind of fermentation of changing food waste amphimicrobian produce volatile fatty acid method it is characterised in that：By kitchen garbage pulverizing
To the granule for ＜ 3mm for the particle diameter, it is 1 by strain and changing food waste volume ratio:1.5～2 ratio adds strain, after adjusting inoculation
Changing food waste water content to 88-91%, and fully mix, the changing food waste after mixing carried out under conditions of 34-37 DEG C
Amphimicrobian ferments；In described amphimicrobian sweat, when changing food waste water content is 88-89%, air intake is
0.65-1m3/m2, ventilatory cycle is 11-12min/h, and mixing speed is 80-90r/min；When changing food waste water content is 90-
When 91%, air intake is 0.3-0.65m3/m2, ventilatory cycle is 9-10min/h, and mixing speed is 60-70r/min.
2. according to claim 1 produce volatile fatty acid method it is characterised in that：Described changing food waste is leftover
And/or dish leaf.
3. according to claim 1 and 2 produce volatile fatty acid method it is characterised in that：Described strain is under city
The mud that water channel and/or sewage treatment plant are taken.
4. according to claim 1 and 2 produce volatile fatty acid method it is characterised in that：Described amphimicrobian fermentation
Cycle is 2-3 days.
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| CN201410281875.3A CN104017834B (en) | 2014-06-23 | 2014-06-23 | Method for producing volatile fatty acid (VFA) through facultative anaerobic fermentation of kitchen waste |
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| CN104017834A CN104017834A (en) | 2014-09-03 |
| CN104017834B true CN104017834B (en) | 2017-02-15 |
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| CN104762361B (en) * | 2015-04-17 | 2018-08-03 | 农业部沼气科学研究所 | Anaerobic digestion of kitchen wastes quickly starts and the method for Effec-tive Function |
| CN106755127A (en) * | 2017-04-10 | 2017-05-31 | 河南天冠纤维乙醇有限公司 | A kind of method that alcohol manioc waste produces biogas with stalk coupled fermentation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080104A (en) * | 2010-07-09 | 2011-06-01 | 深圳市东江环保股份有限公司 | Comprehensive treatment method for preparing gas and fertilizer by utilizing kitchen waste |
| CN102701557A (en) * | 2012-06-08 | 2012-10-03 | 同济大学 | Quick starting method for producing biogas through anaerobic fermentation of municipal sludge |
| CN102796774A (en) * | 2012-07-18 | 2012-11-28 | 同济大学 | Method for preparing short-chain fatty acid with high content of propanoic acid by continuous fermentation |
| CN103553726A (en) * | 2013-11-06 | 2014-02-05 | 中创宏远（北京）环保科技有限公司 | Method for preparing liquid organic fertilizer from kitchen waste |
| CN103555775A (en) * | 2013-10-22 | 2014-02-05 | 同济大学 | Method for producing volatile fatty acid through promoting anaerobic fermentation of kitchen wastes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8329455B2 (en) * | 2011-07-08 | 2012-12-11 | Aikan North America, Inc. | Systems and methods for digestion of solid waste |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080104A (en) * | 2010-07-09 | 2011-06-01 | 深圳市东江环保股份有限公司 | Comprehensive treatment method for preparing gas and fertilizer by utilizing kitchen waste |
| CN102701557A (en) * | 2012-06-08 | 2012-10-03 | 同济大学 | Quick starting method for producing biogas through anaerobic fermentation of municipal sludge |
| CN102796774A (en) * | 2012-07-18 | 2012-11-28 | 同济大学 | Method for preparing short-chain fatty acid with high content of propanoic acid by continuous fermentation |
| CN103555775A (en) * | 2013-10-22 | 2014-02-05 | 同济大学 | Method for producing volatile fatty acid through promoting anaerobic fermentation of kitchen wastes |
| CN103553726A (en) * | 2013-11-06 | 2014-02-05 | 中创宏远（北京）环保科技有限公司 | Method for preparing liquid organic fertilizer from kitchen waste |
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Application publication date: 20140903 Assignee: Chengdu energy and Environment Engineering Institute, Ministry of Agriculture Assignor: BIOGAS INSTITUTE OF MINISTRY OF AGRICULTURE Contract record no.: 2018510000042 Denomination of invention: Method for producing volatile fatty acid (VFA) through facultative anaerobic fermentation of kitchen waste Granted publication date: 20170215 License type: Exclusive License Record date: 20180820 |
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