CN102776240A - Method for increasing sludge fermenting volatile acid output - Google Patents
Method for increasing sludge fermenting volatile acid output Download PDFInfo
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- CN102776240A CN102776240A CN2012102498135A CN201210249813A CN102776240A CN 102776240 A CN102776240 A CN 102776240A CN 2012102498135 A CN2012102498135 A CN 2012102498135A CN 201210249813 A CN201210249813 A CN 201210249813A CN 102776240 A CN102776240 A CN 102776240A
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Abstract
The invention belongs to the technical field of environment protection, and particularly relates to a method for increasing sludge fermenting volatile acid output. The method comprises the steps of: adding municipal sludge into a reactor; adding humic acid at the same time; controlling the pH (Potential Of Hydrogen), the temperature and the time of the substrate in the reactor; and carrying out anaerobic fermentation to generate acid, wherein the concentration of humic acid is determined as follows: 0.2 to 200mg of humic acid is added corresponding to 1g of sludge volatile suspending solid, the pH is controlled to between 7.5 to 11, the temperature is controlled to at 25 or 35 DEG C, and the fermentation is carried out for 2 to 20 days. By adopting the method, about 60% of volatile acid output in sludge fermentation is increased when a certain amount of humic acid is added and a proper technological condition is provided.
Description
Technical field
The invention belongs to environmental protection technical field, be specifically related to a kind of method that improves sludge fermentation volatile acid output.
Background technology
Along with the increase of urban population density and the expansion day by day of cities and towns scale, the municipal wastewater amount that needs to handle also increases thereupon, and then causes Sewage Plant to face a large amount of pending excess sludges.Not only contain objectionable impuritiess such as pathogenic micro-organism, heavy metal in the excess sludge, also have inorganic salt and large amount of organic (being mainly protein and glucide) simultaneously.At present often excess sludge is carried out anaerobically fermenting to reach the purpose of minimizing, stabilization and resource utilization.
Organism can produce materials such as volatile acid, hydrogen, methane through anaerobically fermenting in the mud, wherein volatile acid can be used for the municipal effluent denitrogenation dephosphorizing supplementary carbon source, biosynthesizing PHA raw material and be used for producing hydrogen and methane.Simple anaerobically fermenting without any supplementary means can only make excess sludge produce a spot of volatile acid; In order to improve sludge anaerobic fermentation volatile acid output as much as possible, the main at present means such as mechanical process (as ultrasonic), chemical method (acid-alkali treatment), thermal treatment, enzymolysis process that adopt.
Humic acid is the larger molecular organics matter that occurring in nature extensively exists, and its stable and complicated organism that to be plant and animal residues form through long-term physics, chemistry, biological action is widely used in fields such as agricultural are herded, oil, chemical industry, building materials.A lot of at present researchs show that humic acid not only can influence the migration conversion of inorganic metal and (see document Ore Geology Reviews, 1996,11 (1-3): 1-31; Applied Geochemistry, 2012,27 (2): 378-389) can also promote complicated organic biological degradation (to see document Applied Microbiology and Biotechnology, 2011,91 (2): 417-424; International Biodeterioration&Biodegradation, 2009,63 (7): 923-927).The excess sludge of urban wastewater treatment firm contains the organism of many complicated components and difficult degradation; (see document Environmental Science & Technology in conjunction with this seminar former studies achievement; 2006; 40 (6): 2025-2029) can consider under alkaline condition, suitably to add a certain amount of humic acid and promote that organic decomposition produces more volatile acid in the mud, and further improve its stable degree.
Summary of the invention:
The object of the present invention is to provide a kind of method that improves sludge fermentation volatile acid output.
The method of the raising sludge fermentation volatile acid output that the present invention proposes, concrete steps are following:
Municipal sludge is joined in the reactor drum, and add humic acid, substrate alkaline pH value, temperature and time carry out anaerobic fermentation and acid production in the controlling reactor; Wherein: described humic acid concentration is corresponding 0.2 ~ 200 mg humic acid that adds of every g mud VSS; The pH value is controlled at 7.5 ~ 11; Temperature is controlled at 25 ℃ or 35 ℃; The fermentation fate is 2 ~ 10d.
Among the present invention, said humic acid is a natural humus acid purification thing, and outward appearance is the chocolate amorphous powder.
Among the present invention: the humic acid dosage is that every g mud VSS adds 10mg, and anaerobically fermenting pH value is 10, and temperature is 35 ℃, and the fermentation fate is 6d.
The invention has the beneficial effects as follows:
(1) improved municipal sludge anaerobically fermenting volatile acid ultimate production, do not added the total volatile acid output of the control group of humic acid than similarity condition under the implementation condition preferably and improve about 60%.
(2) operational condition of the present invention is simple implements easily, and used humic acid is cheap and easy to get, improves the method for volatile acid output than thermal treatment, ultrasonic etc. and practices thrift cost.
(3) the present invention has improved the resource utilization efficient of municipal sludge, has further promoted sludge stabilizing.
Embodiment
Do further explain below in conjunction with embodiment, the instance of being lifted below being to be understood that does not comprise all the elements of the present invention just in order to explain the present invention.
Embodiment 1
Be concentrated into VSS 10g/L (TSS ≈ 14g/L, pH ≈ 6.86, TCOD ≈ 14200mg/L) after municipal sludge removed the bulk foreign material; The mud adding volume of getting after 3L concentrates is the synthetic glass anaerobic reaction device of 5L; The humic acid dosage is 10mg humic acid/g VSS; Regulate pH 7.5,25 ℃ of temperature, anaerobism stirs 4d.Gained volatile acid concentration is 483mg COD/L.
Embodiment 2
The ratio of adding is the humic acid of 0.2mg/g VSS in the municipal sludge, regulates pH 7.5,35 ℃ of temperature, and anaerobism stirs 6d, and other are operated with embodiment 1.Gained volatile acid concentration is 1153mg COD/L.
Embodiment 3
The ratio of adding is the humic acid of 2mg/g VSS in the municipal sludge, regulates pH 8,35 ℃ of temperature, and anaerobism stirs 6d, and other are operated with embodiment 1.Gained volatile acid concentration is 1885mg COD/L.
Embodiment 4
The ratio of adding is the humic acid of 5mg/g VSS in the municipal sludge, regulates pH 8,35 ℃ of temperature, and anaerobism stirs 2d, and other are operated with embodiment 1.Gained volatile acid concentration is 1031mg COD/L.
Embodiment 5
The ratio of adding is the humic acid of 30mg/g VSS in the municipal sludge, regulates pH 9,25 ℃ of temperature, and anaerobism stirs 4d, and other are operated with embodiment 1.Gained volatile acid concentration is 1450mg COD/L.
Embodiment 6
The ratio of adding is the humic acid of 0.2mg/g VSS in the municipal sludge, regulates pH 9,35 ℃ of temperature, and anaerobism stirs 8d, and other are operated with embodiment 1.Gained volatile acid concentration is 2089mg COD/L.
Embodiment 7
The ratio of adding is the humic acid of 2mg/g VSS in the municipal sludge, regulates pH 10,35 ℃ of temperature, and anaerobism stirs 6d, and other are operated with embodiment 1.Gained volatile acid concentration is 3255mg COD/L.
Embodiment 8
The ratio of adding is the humic acid of 10mg/g VSS in the municipal sludge, regulates pH 10,35 ℃ of temperature, and anaerobism stirs 6d, and other are operated with embodiment 1.Gained volatile acid concentration is 4276mg COD/L.
Embodiment 9
The ratio of adding is the humic acid of 100mg/g VSS in the municipal sludge, regulates pH 10,35 ℃ of temperature, and anaerobism stirs 4d, and other are operated with embodiment 1.Gained volatile acid concentration is 2813mg COD/L.
Embodiment 10
The ratio of adding is the humic acid of 200mg/g VSS in the municipal sludge, regulates pH 10,25 ℃ of temperature, and anaerobism stirs 10d, and other are operated with embodiment 1.Gained volatile acid concentration is 2667mg COD/L.
Embodiment 11
The ratio of adding is the humic acid of 50mg/g VSS in the municipal sludge, regulates pH 11,25 ℃ of temperature, and anaerobism stirs 2d, and other are operated with embodiment 1.Gained volatile acid concentration is 720mg COD/L.
Embodiment 12
The ratio of adding is the humic acid of 10mg/g VSS in the municipal sludge, regulates pH 11,35 ℃ of temperature, and anaerobism stirs 4d, and other are operated with embodiment 1.Gained volatile acid concentration is 1989mg COD/L.
Above-mentioned description to embodiment is can understand and use the present invention for the ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (3)
1. method that improves sludge fermentation volatile acid output is characterized in that concrete steps are following:
Municipal sludge is joined in the reactor drum, and add humic acid, substrate alkaline pH value, temperature and time carry out anaerobic fermentation and acid production in the controlling reactor; Wherein: described humic acid concentration is corresponding 0.2 ~ 200 mg humic acid that adds of every g mud VSS; The pH value is controlled at 7.5 ~ 11; Temperature is controlled at 25 ℃ or 35 ℃; The fermentation fate is 2 ~ 10d.
2. method according to claim 1 is characterized in that: described humic acid is a natural humus acid purification thing.
3. method according to claim 1 is characterized in that the humic acid dosage is that every g mud VSS adds that 10 mg, anaerobically fermenting pH are controlled at 10, temperature is that 35 ℃, fermentation fate are 6d.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979118A (en) * | 2021-01-22 | 2021-06-18 | 同济大学 | Harmful substance reduction and control method for high-value biotransformation process of urban organic waste |
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| CN101085997A (en) * | 2006-06-09 | 2007-12-12 | 同济大学 | Method for promoting organic acid yield from sludge |
| CN101684050A (en) * | 2008-09-25 | 2010-03-31 | 伏小勇 | Urban sludge rapid stabilization treatment method |
| CN101768609A (en) * | 2009-09-01 | 2010-07-07 | 同济大学 | Method for improving sludge anaerobic fermentation and acid production |
| CN102476897A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Novel sludge treatment method |
| CN102586344A (en) * | 2012-03-19 | 2012-07-18 | 同济大学 | Method for producing volatile fatty acid through heating and circular anaerobic fermentation of sludge |
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2012
- 2012-07-19 CN CN201210249813.5A patent/CN102776240B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101085997A (en) * | 2006-06-09 | 2007-12-12 | 同济大学 | Method for promoting organic acid yield from sludge |
| CN101684050A (en) * | 2008-09-25 | 2010-03-31 | 伏小勇 | Urban sludge rapid stabilization treatment method |
| CN101768609A (en) * | 2009-09-01 | 2010-07-07 | 同济大学 | Method for improving sludge anaerobic fermentation and acid production |
| CN102476897A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Novel sludge treatment method |
| CN102586344A (en) * | 2012-03-19 | 2012-07-18 | 同济大学 | Method for producing volatile fatty acid through heating and circular anaerobic fermentation of sludge |
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| 《Appl Microbiol Biotechnol》 20110421 Guangfei Liu等 "Decolorization of azo dyes by Shewanella oneidensis MR-1 in the presence of humic acids" 第417-424页 1-3 第91卷, 第2期 * |
| 《International Biodeterioration & Biodegradation》 20090710 Ljuba Stehlickova等 "Intensification of phenol biodegradation by humic substances" 第923-927页 1-3 第63卷, 第7期 * |
| GUANGFEI LIU等: ""Decolorization of azo dyes by Shewanella oneidensis MR-1 in the presence of humic acids"", 《APPL MICROBIOL BIOTECHNOL》 * |
| LJUBA STEHLICKOVA等: ""Intensification of phenol biodegradation by humic substances"", 《INTERNATIONAL BIODETERIORATION & BIODEGRADATION》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979118A (en) * | 2021-01-22 | 2021-06-18 | 同济大学 | Harmful substance reduction and control method for high-value biotransformation process of urban organic waste |
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