CN103343145B - Reduced iron powder is utilized to promote the method for sludge anaerobic fermentative production short chain fatty acid - Google Patents
Reduced iron powder is utilized to promote the method for sludge anaerobic fermentative production short chain fatty acid Download PDFInfo
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Abstract
The invention belongs to environment protection and resource technology field, relate to a kind of method promoting sludge anaerobic fermentative production short chain fatty acid.The method comprises the following steps: mud is put into container by (1), supernatant fluid of then draining, and obtains mud sample; (2) in mud sample, add reduced iron powder, and reactor is filled nitrogen drive oxygen, sealed reactor, reaction system material is mixed, control leavening temperature, carry out anaerobically fermenting.The present invention can carry out minimizing to mud effectively, reduces the pollution to environment, and can carry out recycling to mud, produces the short chain fatty acid in a large number with higher utility value.
Description
Technical field
The invention belongs to environment protection and resource technology field, relate to a kind of method promoting sludge anaerobic fermentative production short chain fatty acid.
Background technology
Biological treatment is as a kind of second-stage treatment method of municipal sewage treatment, microorganism in system is utilized to complete degraded to organic pollutant, to remove the technique that suspended substance and solvability biodegradable organic are main purpose, be widely used at present.But can produce in biological treatment and be rich in organic mud (comprising primary sludge and excess sludge) in a large number.According to estimates, by the end of the end of the year 2010, the sludge yield of China will have reached 4,000,000 tons (dry weights), and the environmental pollution of generation is day by day serious, carries out suitable process dispose very urgent to it.
Anaerobically fermenting utilizes the effect of anaerobion, effectively the organic matter degradation existed a large amount of in mud can be converted into methane (CH
4), hydrogen (H
2) etc. the energy substance that can again utilize.Short chain fatty acid (comprises acetic acid, propionic acid, butanic acid, isopropylformic acid, positive valeric acid and isovaleric acid etc.) be also the intermediate product that in sludge anaerobic fermenting process, a class is important, it has wide range of applications, and is not only the indispensable raw materials such as synthetic paint, coating and makeup, and can provides requisite organic carbon source for microorganisms of nitrogen and phosphors removal in sewage.Research proves, in reinforced sewage Biological Phosphorus Removal System (EBPR), often removes the short chain fatty acid (Water Science and Technology, 1992,25 (4-5): 185-194) that 1mg phosphorus needs to consume 6-9mg.Therefore, for effectively removing the phosphorus in sewage, prevent the too high environment water eutrophication caused of water outlet phosphorus, sewage work must provide a large amount of easy organic carbon sources utilized by microorganism.But in most situation, the content of the short chain fatty acid in sewage all can not meet the demands, and especially in the sewage of Shelter in South China Cities, organic carbon source is more not enough, causes phosphorus content in water outlet too high, causes the eutrophication of environment water.
In the biological carbon and phosphorous removal system of sewage work, a kind of method improving sewage organic carbon source concentration cost-effectively utilizes the organic substance that in biological treatment system, itself exists, and through suitable process, changes into carbon source needed for microorganisms of nitrogen and phosphors removal.Mud is the waste material formed after sewage work's sewage disposal, the hazardous and noxious substances wherein contained, as heavy metal ion and pathogenic bacteria etc. will produce larger pollution to environment, but be but rich in organic substance in mud, content is (particularly excess sludge more than 50%, its organic content is higher), mainly easily utilized the organic constituent of degraded by microorganism with protein and polysaccharide etc., they can be converted into the energy product that can again utilize, as methane (CH by microbial metabolism under anaerobic fermentation conditions
4), hydrogen (H
2) and short chain fatty acid (SCFAs) etc.Therefore, if effectively the organism in mud can be converted into short chain fatty acid, by realization to the minimizing of sludge treatment, innoxious and resource utilization, improve the effect of the denitrogenation dephosphorizing of sewage work simultaneously.This seminar there are some researches show, and excess sludge can be utilized by microorganism under certain conditions and be converted into organic acid (Chinese invention patent, application number 200410067292.7).
The anaerobically fermenting of mud mainly can be divided into three phases, i.e. acidication, product acid and methane phase stage.The production of short chain fatty acid is mainly produced by the first two stage control, and it is generally acknowledged that acidication stage speed is comparatively slow, is the rate-limiting step that sludge fermentation produces acid.Therefore, most research lays particular emphasis on the method seeking and improve sludge hydrolytic speed to shorten the sludge retention time of fermentation system, improves the output of short chain fatty acid.At present, obtain mainly containing for the method improving sludge hydrolytic speed of extensively accreditation: high-temperature heat treatment, freeze thawing treatment, mechanical treatment, ultrasonication, chemical treatment (comprising the adjustment of pH, adding of tensio-active agent), its ultimate principle is all make the organic substance decomposing of those non-solubility particulate forms in mud be converted into micromolecular dissolved matter to be utilized by microorganism, but less for improving the method for producing acid phase speed.
Reduced iron powder has stronger reducing power, can form iron-carbon dioxide process carbon electrode on the one hand with the organic substance in mud, and the structure destroying particulate organic matter makes it easily be utilized by microbial transformation; Also can reduce the redox potential of system on the other hand, the ferro element needed for microorganism is provided, improve the activity of acid-producing microorganisms, thus improve speed and the output of sludge anaerobic fermentative production short chain fatty acid.So far, about utilizing reduced iron powder to promote, the research that sludge fermentation produces short chain fatty acid not yet has report.
Summary of the invention
The object of the invention is to for overcome existing and defect and a kind of method utilizing reduced iron powder to promote sludge anaerobic fermentative production short chain fatty acid is provided.
For achieving the above object, the present invention is by the following technical solutions:
Promote a method for sludge anaerobic fermentative production short chain fatty acid, comprise the following steps:
(1) mud is put into container naturally quiet heavy, supernatant fluid of then draining, obtain mud sample;
(2) in mud sample, add reduced iron powder, and reactor is filled nitrogen drive oxygen, sealed reactor, reaction system material is mixed, control leavening temperature, carry out anaerobically fermenting.
Step (2) does not regulate pH in pH(fermenting process to fluctuate within the scope of 6.5-8.0 during the fermentation), by the acid-producing microorganisms combined action in reduced iron powder and mud, the organism (being mainly the material such as protein and polysaccharide) of dissolved state non-in mud is converted into short chain fatty acid and (comprises acetic acid, propionic acid, isopropylformic acid, butanic acid, isovaleric acid and positive valeric acid etc.), complete the process that reduced iron powder promotes excess sludge anaerobic fermentation and acid production.
Described mud is the mud of sewage work, comprises one or both in primary sludge or excess sludge, and preferably, blending ratio (dry weight) scope of primary sludge and excess sludge is 30:70-0:100.
In described step (1), mud is naturally quiet heavy 24h under 4 DEG C of conditions in a reservoir.
The ratio range of the consumption of described reduced iron powder and the dry weight of mud sample is (0.006 ~ 1.2): 1, more preferably (0.03 ~ 0.6): 1.
Described reduced iron powder is divided into grade iron powder, micron order iron powder or nano grade iron powder, and its particle size range is 50nm-0.25mm, more preferably 50nm-0.15mm.
In described step (2), fill nitrogen and drive oxygen 10min.
In described step (2), in reaction system, the mixing rotating speed of material is 100-110rpm/min.
In described step (2), mud sample in the reactor anaerobically fermenting temperature is 10-55 DEG C, more preferably 20-35 DEG C.
In described step (2), the working time of sludge anaerobic fermentation and acid production is 4-8d.
In described step (2), in anaerobic fermentation process, the pH scope of anaerobic fermentation system is 6.5-8.0.
In a preferred embodiment, the ratio range of reduced iron powder consumption and mud dry weight is (0.03 ~ 0.6): 1.Although the ratio of described reduced iron powder consumption and mud dry weight can promote that in the scope of 0.006:1-1.2:1 the organism in mud is converted into desired fatty acid, and within the specific limits, along with the increase of reduced iron powder amount, more obvious to the promoter action of sludge anaerobic fermentation and acid production, the cumulative concentration of short chain fatty acid is higher.But consider the relation of the cumulative withdrawal of raw materials cost and short chain fatty acid, the ratio range of the comparatively ideal reduced iron powder consumption that the present invention adopts and mud dry weight is 0.03:1-0.6:1.
The ultimate principle that sludge of sewage treatment plant anaerobically fermenting produces short chain fatty acid is to utilize reduced iron powder to promote in the present invention:
Reduced iron powder is a kind of more active metal, its electropotential E
0(Fe
2+/ Fe)=-0.440V, there is stronger reducing power.Under churned mechanically effect, granule sludge is subject to the effects such as shearing on the one hand, broken decomposition, the macromolecular substance (mainly protein and polysaccharose substance) of Sludge Surface can depart from mud granule and enter aqueous phase, reduced iron powder mixes with mud mixture on the other hand, iron-carbon dioxide process carbon electrode can be formed with the organism in mud, destroy the chemical structure of particulate organic matter, it is made to be converted into easily by small-molecule substance that acid-producing microorganisms utilizes, add concentration of substrate, therefore, it is possible to promote the accumulation of short chain fatty acid; The condition of sludge anaerobic fermentation and acid production needs to control in addition, acid-producing bacteria major part is anerobe or facultative anaerobe, need effectively the organism in mud to be converted into target organic acid under lower redox potential condition, and reduced iron powder is as a kind of reductive agent, can with the oxygen (O of sludge fermentation system
2) etc. reaction, reduce the redox potential in fermentation system, for acid-producing microorganisms provides suitable anaerobic environment; In addition, in the process of sludge anaerobic fermentative production short chain fatty acid, first be the small-molecule substance such as amino acid and monose by hydrolytic action by Major organic species in mud (protein and polysaccharide etc.) hydrolysis, then at the end products that the cellular transformation of acid-producing microorganisms is based on short chain fatty acid, and be secreted into extracellular, this metabolic process relates to the participation of a large amount of transfer transports and multiple important metabolic enzyme, reduced iron powder can promote the Metabolic activity of microorganism as a kind of electron donor, is conducive to the production that acid-producing bacteria carries out short chain fatty acid; The iron ion that its oxidation produces also is the bioelement of microorganism growth, effectively can improve the activity of producing the many key enzymes of acid phase, such as participate in a kind of key enzyme pyruvic acid ferritin oxydo-reductase (the pyruvate-ferredoxin oxidoreductase in acid process, POR) Fe-S clustering architecture is just comprised, these effects of reduced iron powder all greatly improve the activity of acid-producing microorganisms, accelerate its metabolic rate, thus improve speed and the output of sludge anaerobic fermentative production short chain fatty acid.
Utilizing reduced iron powder to promote in the process of sludge anaerobic fermentative production short chain fatty acid, the condition of fermentation and acid needs to be well controlled, and prevents from entering the methane phase stage, consumes the product producing acid phase, is unfavorable for the accumulation of short chain fatty acid.In the present invention, the fermentation condition of major control comprises: the blending ratio of primary sludge and excess sludge, reduced iron powder add concentration, operating temperature and the mud residence time in the reactor.In the present invention, the production of reduced iron powder to the short chain fatty acid of primary sludge and excess sludge has promoter action, but organic content is compared primary sludge and is wanted high in excess sludge, more be conducive to the production of short chain fatty acid, therefore preferably the blending ratio (dry weight, per-cent %) of primary sludge and excess sludge is 30:70-0:100.In the present invention, the ratio of reduced iron powder consumption and mud dry weight effectively can both promote that in the scope of 0.006:1-1.2:1 the organism in mud is converted into desired fatty acid, and within the specific limits, along with the increase of reduced iron powder amount, the promoter action that sludge fermentation produces acid strengthens, and the cumulative concentration of short chain fatty acid improves.But consider the relation of the cumulative withdrawal of raw materials cost and short chain fatty acid, the ratio range of the comparatively ideal reduced iron powder consumption that the present invention adopts and mud dry weight is 0.03:1-0.6:1.Operating temperature will affect microbic activity in the hydrolysis efficiency of fermented sludge and system, thus affects the accumulation of short chain fatty acid, and in the present invention, experiment condition temperature controlling range is 10-55 DEG C, and ideal scope is 20-35 DEG C.In addition, the mud residence time in the reactor also affects the accumulation of short chain fatty acid, it is generally acknowledged that the residence time of mud is less than 8d, acid-producing bacteria activity is higher, be conducive to the accumulation of short chain fatty acid, and when the residence time of mud is more than 8d, environment of system is more conducive to the activity of methanogen, the product short chain fatty acid producing acid phase is converted into methane.In the present invention, the mud residence time is in the reactor 4-8d, and the ideal residence time is 4-6d.
The effect efficiency that advantage of the present invention and practice produce comprises:
1. the mud utilizing municipal sewage plant self to produce carries out the production of short chain fatty acid, not only achieve the minimizing of mud, innoxious and resource utilization, to reduce in mud organic pollutant to the pollution destruction of environment, and the short chain fatty acid transforming production has higher utility value, meets the theory of recycling economy.
2. mud transforms the defect that the short chain fatty acid produced effectively can make up organic carbon source deficiency in municipal wastewater treatment plant biological denitrification phosphorous removal technique, meet the demand of microorganisms of nitrogen and phosphors removal to organic carbon source, improve the effect of this technique denitrogenation dephosphorizing, reduce the concentrating of nutrients such as nitrogen, phosphorus in sewage disposal plant effluent, prevent the generation of environment water eutrophy phenomenon.
3. reduced iron powder can promote the decomposition and inversion of macromole in mud, difficult decomposing organic matter, obtain the substrate that more can utilize for acid-producing microorganisms, and by providing good anaerobic environment, and acid-producing microorganisms and the Fe element of product acid needed for enzyme, promote sludge anaerobic fermentation and acid production speed and output, effectively shorten the time that sludge fermentation produces acid, reduce the volume of sludge treating system, reduce running cost.
Embodiment
The present invention is further illustrated below in conjunction with embodiment.
Embodiment 1
(1) be in 5.0L synthetic glass reactor in working volume, add the supernatant fluid of draining after naturally quiet heavy 24h that traditional activated sludge process produces, the excess sludge (pH=6.8) obtained produces the substrate (i.e. mud sample, following examples are same) of short chain fatty acid as anaerobically fermenting;
(2) in reactor, add particle diameter 0.15mm reduced iron powder, the ratio of its consumption and mud dry weight is 0.3:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein controlling fermentation reaction temperature is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 4d, and the content of the short chain fatty acid of production is that 360.54mg/L(is with chemical oxygen demand gauge).
Embodiment 2
(1) be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, and the excess sludge obtained (pH=6.8) is as the substrate of anaerobically fermenting production short chain fatty acid;
(2) in reactor, add particle diameter 0.15mm reduced iron powder, the ratio of its consumption and mud dry weight is 1.2:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 5d, and the content of the short chain fatty acid of production is that 473.67mg/L(is with chemical oxygen demand gauge).
Embodiment 3
(1) be in 5.0L synthetic glass reactor in working volume, add the quiet heavy 24h of nature of hanging oneself that traditional activated sludge process produces and to drain supernatant fluid, the excess sludge obtained (pH=6.8) produces the substrate of short chain fatty acid as anaerobically fermenting;
(2) in reactor, add particle diameter 10 μm of reduced iron powders, the ratio of its consumption and mud dry weight is 0.3:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 5d, and the content of the short chain fatty acid of production is that 620.92mg/L(is with chemical oxygen demand gauge).
Embodiment 4
(1) be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, and the excess sludge obtained (pH=6.8) is as the substrate of anaerobically fermenting production short chain fatty acid;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.006:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 4d, and the content of the short chain fatty acid of production is that 305.47mg/L(is with chemical oxygen demand gauge).
Embodiment 5
(1) be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, and the excess sludge obtained (pH=6.8) is as the substrate of anaerobically fermenting production short chain fatty acid;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.06:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 4d, and the content of the short chain fatty acid of production is that 575.55mg/L(is with chemical oxygen demand gauge).
Embodiment 6
(1) be in 5.0L synthetic glass reactor in working volume, add and to drain supernatant fluid through naturally quiet heavy 24h, the primary sludge obtained (pH=6.7) produces the substrate of short chain fatty acid as anaerobically fermenting;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.06:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 5d, and the content of the short chain fatty acid of production is that 383.07mg/L(is with chemical oxygen demand gauge).
Embodiment 7
(1) be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, and the excess sludge obtained (pH=6.8) is as the substrate of anaerobically fermenting production short chain fatty acid;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.12:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 5d, and the content of the short chain fatty acid of production is that 1126.19mg/L(is with chemical oxygen demand gauge).
Embodiment 8
(1) be in 5.0L synthetic glass reactor in working volume, add and to drain supernatant fluid through naturally quiet heavy 24h, equal proportion (the 50%:50% obtained, dry weight) primary sludge and excess sludge, the mixing sludge (mud that primary sludge and excess sludge equal proportion (50%:50%, dry weight) mix) (pH=6.7) of composition produces the substrate of short chain fatty acid as anaerobically fermenting;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.12:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 6d, and the content of the short chain fatty acid of production is that 823.07mg/L(is with chemical oxygen demand gauge).
Embodiment 9
(1) be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, and the excess sludge obtained (pH=6.8) is as the substrate of anaerobically fermenting production short chain fatty acid;
(2) in reactor, add particle diameter 80nm reduced iron powder, the ratio of its consumption and mud dry weight is 0.12:1, and reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.By the combined action of the microorganism in mud and reduced iron powder, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 35 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 5d, and the content of the short chain fatty acid of production is that 1723.07mg/L(is with chemical oxygen demand gauge).
Comparative example 1
Be in 5.0L synthetic glass reactor in working volume, what add that traditional activated sludge process produces to drain supernatant fluid through naturally quiet heavy 24h, the excess sludge (pH=6.8) obtained produces the substrate of short chain fatty acid as anaerobically fermenting, do not add reduced iron powder, reactor is filled nitrogen and drive oxygen 10min, sealed reactor ferments.Only by the microbial process that mud itself is contained, the organism contained in mud is converted into short chain fatty acid.Wherein temperature of reaction is 20 ± 1 DEG C, and the pH of fermentation system changes within the scope of 6.5-8.0, and the mud residence time is in the reactor 6d, and the content of the short chain fatty acid of production is that 239.14mg/L(is with chemical oxygen demand gauge).
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (13)
1. promote a method for sludge anaerobic fermentative production short chain fatty acid, it is characterized in that: comprise the following steps:
(1) mud is put into container naturally quiet heavy, supernatant fluid of then draining, obtain mud sample;
(2) in mud sample, add reduced iron powder, and reactor is filled nitrogen drive oxygen, sealed reactor, reaction system material is mixed, control leavening temperature, carry out anaerobically fermenting;
Described reduced iron powder is grade iron powder, micron order iron powder or nano grade iron powder, and its particle size range is 50nm-0.25mm.
2. method according to claim 1, is characterized in that: described mud is the mud of sewage work, comprises one or both in primary sludge or excess sludge.
3. method according to claim 2, is characterized in that: the blending ratio of primary sludge and excess sludge is 30:70-0:100, with dry weight basis.
4. method according to claim 1, is characterized in that: in described step (1), and mud is naturally quiet heavy 24h under 4 DEG C of conditions in a reservoir.
5. method according to claim 1, is characterized in that: the ratio range of the consumption of described reduced iron powder and the dry weight of mud sample is (0.006 ~ 1.2): 1.
6. method according to claim 1, is characterized in that: the ratio range of the consumption of described reduced iron powder and the dry weight of mud sample is (0.03 ~ 0.6): 1.
7. method according to claim 1, is characterized in that: described reduced iron powder is grade iron powder, micron order iron powder or nano grade iron powder, and its particle size range is 50nm-0.15mm.
8. method according to claim 1, is characterized in that: in described step (2), fill nitrogen and drive oxygen 10min.
9. method according to claim 1, is characterized in that: in described step (2), in reaction system, the mixing rotating speed of material is 100-110rpm.
10. method according to claim 1, is characterized in that: in described step (2), and mud sample in the reactor anaerobically fermenting temperature is 10-55 DEG C.
11. methods according to claim 1, is characterized in that: in described step (2), and mud sample in the reactor anaerobically fermenting temperature is 20-35 DEG C.
12. methods according to claim 1, is characterized in that: in described step (2), and the working time of sludge anaerobic fermentation and acid production is 4-8d.
13. methods according to claim 1, is characterized in that: in described step (2), in anaerobic fermentation process, and the pH scope of anaerobic fermentation system is 6.5-8.0.
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| CN105779516B (en) * | 2016-04-27 | 2019-06-25 | 东华大学 | A kind of Zero-valent Iron promotes the fermentation process of quenched sludge production L-type lactic acid |
| CN105886559B (en) * | 2016-05-05 | 2019-05-31 | 南京理工大学 | A method of short chain fatty acids are produced using excess sludge anaerobic fermentation |
| CN108265087B (en) * | 2018-01-30 | 2021-10-19 | 河海大学 | Method for promoting anaerobic fermentation of sludge to produce volatile fatty acid |
| CN110066082B (en) * | 2019-04-16 | 2020-10-20 | 浙江大学 | Sludge anaerobic fermentation treatment method for synchronously strengthening acid production and phosphorus removal |
| CN110734933B (en) * | 2019-10-30 | 2023-04-07 | 同济大学 | Method for improving medium-chain fatty acid yield of anaerobic fermentation of waste activated sludge |
| CN111762986B (en) * | 2020-06-04 | 2021-10-29 | 昆明理工大学 | Method and device for stabilizing heavy metals in electrically-promoted and strengthened anaerobic fermentation sludge |
| CN111909970B (en) * | 2020-08-10 | 2023-03-10 | 北京化工大学 | Method for producing medium-chain fatty acid by fermentation of exogenous medium reinforced anaerobic microorganisms |
| CN112279478A (en) * | 2020-10-23 | 2021-01-29 | 国河环境研究院(南京)有限公司 | Method for recovering phosphorus in excess sludge in form of vivianite |
| CN115432897A (en) * | 2022-10-25 | 2022-12-06 | 西安建筑科技大学 | Method for promoting excess sludge to produce methane based on citric acid reinforced zero-valent iron |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635125A (en) * | 2004-10-19 | 2005-07-06 | 同济大学 | Process for preparing organic acid from surplus sludge |
-
2013
- 2013-06-25 CN CN201310257563.4A patent/CN103343145B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635125A (en) * | 2004-10-19 | 2005-07-06 | 同济大学 | Process for preparing organic acid from surplus sludge |
Non-Patent Citations (3)
| Title |
|---|
| Fe对产氢发酵细菌发酵途径及产氢能力影响;王勇等;《太阳能学报》;20030430;第24卷(第2期);222-226 * |
| 污泥停留时间及温度对剩余污泥连续生产短链脂肪酸的影响;王琴;《中国优秀硕士学位论文全文数据库工程科技I辑》;20080615(第06期);摘要，第2-4章 * |
| 活性污泥产酸发酵研究进展;陶颖等;《生物技术》;20111231;第21卷(第3期);94-97 * |
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