CN101880115B - Method for supplementing denitrifying carbon source by utilizing excess sludge ethanol-type fermentation - Google Patents
Method for supplementing denitrifying carbon source by utilizing excess sludge ethanol-type fermentation Download PDFInfo
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- CN101880115B CN101880115B CN2010101048527A CN201010104852A CN101880115B CN 101880115 B CN101880115 B CN 101880115B CN 2010101048527 A CN2010101048527 A CN 2010101048527A CN 201010104852 A CN201010104852 A CN 201010104852A CN 101880115 B CN101880115 B CN 101880115B
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Abstract
The invention discloses a method for supplementing a denitrifying carbon source by utilizing excess sludge ethanol-type fermentation, which aims at the problems of low average level of the biochemical oxygen demand 5 (BOD5) of municipal sewage in China and ubiquitous shortage of the denitrifying carbon source. The method comprises the following steps of: allowing the excess sludge which is subjected to pyrohydrolysis pretreatment to enter a fermentation reactor; cultivating and domesticating ethanol-type zymophyte by using the sludge as a matrix; controlling the fermentation reaction to be at an ethanol-type fermentation stage; refluxing the products to a pyrohydrolysis stage; controlling the pyrohydrolysis temperature to be between 120 and 130 DEG C so that substances with boiling points lower than 120 DEG C, such as ethanol, acetic acid and the like, exist in the form of gas; and collecting a high-quality organic carbon source which mainly comprises ethanol and acetic acid in a condensation reclaiming mode. The method has the advantages that: the denitrifying carbon source which mainly comprises the ethanol and the acetic acid effectively improves the denitrification efficiency, and the problem of phosphorus accumulation of a system caused by that the sludge after anaerobic digestion is directly used as an additional carbon source is avoided due to a special carbon source extraction mode; and the method also has the advantages of simple control condition of the whole process, easy operation and low operational cost.
Description
Technical field
The present invention relates to a kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source,, belong to technical field of sewage to solve the insufficient problem of sewage work's denitrifying carbon source.
Background technology
Along with several big water system eutrophication aggravations of China, break out wawter bloom, red tide phenomenon in succession, country also improves constantly the water body emission standard.Biological denitrificaion is to use the most general technology in the municipal sewage treatment, and the removal of total nitrogen finally will be passed through denitrification process, and denitrifying bacteria is converted into N with the nitric nitrogen that aerobic processes produces under anoxia condition
2Enter atmosphere, to reach the purpose of removing total nitrogen in the water.Reach Nitrogen removal effect preferably, denitrification process must have enough organic carbon sources (general BOD
5/ TN＞3-5 thinks that promptly carbon source is sufficient).But, present China municipal effluent BOD
5M.L. is lower, and the insufficient problem of ubiquity denitrifying carbon source has limited greatly that the Sewage Plant with biological denitrificaion function is stable to play a role effectively.
To the not enough problem of denitrifying carbon source, early stage research mainly is to add low molecule organic matters such as methyl alcohol, ethanol in the denitrification section, and this additional carbon can improve denitrification rate, but costs an arm and a leg.In recent years the research of additional carbon being mainly utilizes trade effluent or percolate as denitrifying carbon source; Can not only realize economic additional carbon dosing method; Can also solve the handling problem of part trade effluent and percolate; But the ammonia nitrogen of these waste water ubiquity high densitys, heavy metal ion and other toxic substance are not enough as water quality is understood, and blindly add and may produce serious toxic side effect to whole denitrification system; Mainly be as denitrifying carbon source in addition with excess sludge after anaerobic digestion; This method also can improve denitrification efficient; But contain a large amount of phosphoric acid salt in the mud after anaerobic treatment; Before as denitrifying carbon source, need carry out the chemical precipitation dephosphorization, so not only increased running cost also can because of dephosphorization thoroughly or medicament add the excessive Sewage treatment systems secondary pollution problem that causes.
Summary of the invention
To the problem that above method exists, the present invention mainly provides a kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source, and main purpose is:
(1) solves the insufficient problem of sewage work's denitrifying carbon source;
(2) utilize the main end products ethanol of ethanol-type fermentation, acetate as adding the denitrification organic carbon source;
(3) avoid the mud after the anaerobic treatment as denitrification section organic carbon source problem, the problem includes: phosphorus accumulation problem.
The present invention in order to achieve the above object, particular content is following:
A kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source comprises: thermal hydrolysis reactor drum, fermentation reactor, return line, condensing works, carbon source holding tank and shore pipe; It is characterized in that: the excess sludge of sewage work gets into fermentation reactor after the pre-treatment of thermal hydrolysis reactor drum; To ferment the back remainder through the shore pipe discharging; Other part is back to the thermal hydrolysis reactor drum through return line; The trip temperature of going forward side by side regulation and control are between 120 ℃-130 ℃, and the materials such as ethanol, acetate that make boiling point be lower than 120 ℃ exist with gaseous form, reclaim this portion of product to carbon source holding tank through the condensing and recycling device at last.
The thermal hydrolysis reactor drum can effectively improve the anaerobic digestion performance of mud as the pretreatment unit of excess sludge, and for effective control in follow-up ethanol-type fermentation stage provides safeguard, and the thermal hydrolysis reactor drum has special condensation of gas retrieving arrangement.
Fermentation reactor receives the pretreated mud of thermal hydrolysis, and is domesticating of substrate culture ethanol-type fermentation bacterium with it, and fermentation reactor is controlled at the ethanol-type fermentation stage, and tunning is main with ethanol, acetate; Part resultant product is discharged through shore pipe, and other product is back to the thermal hydrolysis reactor drum; When ethanol-type fermentation mud is back to the thermal hydrolysis reactor drum; Thermal hydrolysis is controlled between 120 ℃～130 ℃; Because the boiling point of ethanol and acetate is respectively 118 ℃ and 78.3 ℃; Ethanol and acetate evaporate in pyrohydrolysis process, and through the condensing and recycling device main end products ethanol of ethanol-type fermentation and acetate are reclaimed, and are added to sewage work's denitrification section supplementary carbon source as the high-quality organic carbon source.
Beneficial effect of the present invention
1, the used mud of the present invention is from the excess sludge of sewage work, and the product after it is handled has not only effectively utilized resource as denitrifying carbon source, and mud is further handled, and finally reaches the purpose of waste recycling;
2, fermentation reactor is controlled at the ethanol-type fermentation stage, collects the main end products ethanol of ethanol-type fermentation, acetate through the condensing and recycling mode.As denitrifying carbon source, can effectively improve denitrification efficient with this;
3, reclaim main end products ethanol of ethanol-type fermentation and acetate after evaporating with the condensing and recycling device, avoid the system's phosphorus accumulation problem that directly causes with anaerobically digested sludge as denitrifying carbon source.
Description of drawings
Fig. 1 is a kind of method process schematic representation that utilizes the excess sludge ethanol-type fermentation supplementing denitrifying carbon source
Label declaration among the figure:
1, thermal hydrolysis reactor drum 2, fermentation reactor 3, mud return line 4, condensing works
5, carbon source holding tank 6, shore pipe 7, advance the mud pipe
Embodiment:
It is following to specify embodiment of the present invention in conjunction with Fig. 1:
With simple phase carbon source is that matrix is cultivated the ethanol-type fermentation bacterium; Cultured ethanol-type fermentation bacterium is added in the fermentation reactor (2) as seed sludge; Control parameters (pH value, basicity, temperature, redox potential etc.) is controlled at the ethanol-type fermentation stage with fermentation reactor (2); Stable back progressively replaces simple liquid matrix with the pretreated excess sludge product of thermal hydrolysis reactor drum (1), and the ethanol-type fermentation bacterium is tamed, and it is the ethanol-type fermentation stage of matrix that fermentation reactor (2) is controlled at mud; Fermentation after product remainder is through shore pipe (6) discharging; Other part is back to thermal hydrolysis reactor drum (1) through return line (3), and with temperature adjusting between 120 ℃～130 ℃, the material such as ethanol, acetate that makes boiling point be lower than 120 ℃ exists with gaseous form; Reclaim this portion of product to carbon source holding tank (5) through condensing and recycling device (4) at last, the high-quality organic carbon source after the recovery replenishes according to the shortage situation of place Sewage Plant denitrifying carbon source and adds.
Claims (4)
1. a method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source comprises: thermal hydrolysis reactor drum (1), fermentation reactor (2), return line (3), condensing works (4), carbon source holding tank (5) and shore pipe (6); It is characterized in that: the excess sludge of sewage work gets into fermentation reactor (2) after thermal hydrolysis reactor drum (1) pre-treatment; To ferment the back remainder through shore pipe (6) discharging; Other part is back to thermal hydrolysis reactor drum (1) through return line (3); The trip temperature of going forward side by side regulation and control are between 120 ℃-130 ℃, and the ethanol, the acetate material that make boiling point be lower than 120 ℃ exist with gaseous form, reclaim this portion of product to carbon source holding tank (5) through condensing works (4) at last.
2. according to the said a kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source of claim 1; It is characterized in that: described mud is the excess sludge of sewage work; With the pretreatment mode of thermal hydrolysis as excess sludge; Can effectively improve the anaerobic digestion performance of mud, for follow-up ethanol-type fermentation control provides safeguard.
3. according to the said a kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source of claim 1, it is characterized in that: fermentation reactor is controlled at the ethanol-type fermentation stage, and making the fermentation end products is main with ethanol, acetate.
4. according to the said a kind of method of utilizing the excess sludge ethanol-type fermentation supplementing denitrifying carbon source of claim 1, it is characterized in that: the sludge part through ethanol-type fermentation in the fermentation reactor is back to the thermal hydrolysis reactor drum; And control thermal hydrolysis temperature utilizes main end products ethanol of condensing and recycling ethanol-type fermentation and acetate as the denitrification organic carbon source between 120 ℃～130 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101048527A CN101880115B (en) | 2010-02-03 | 2010-02-03 | Method for supplementing denitrifying carbon source by utilizing excess sludge ethanol-type fermentation |
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| CN2010101048527A CN101880115B (en) | 2010-02-03 | 2010-02-03 | Method for supplementing denitrifying carbon source by utilizing excess sludge ethanol-type fermentation |
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| CN101880115A CN101880115A (en) | 2010-11-10 |
| CN101880115B true CN101880115B (en) | 2012-12-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718315A (en) * | 2012-06-01 | 2012-10-10 | 天津大学 | Method for hydrolyzing and acidifying residual sludge and organic wastes and supplementing carbon sources to promote biological nitrogen removal and application thereof |
| CN103304042A (en) * | 2013-06-20 | 2013-09-18 | 同济大学 | Method for preparing rapid external carbon source through cassava ethanol wastewater |
| CN103693813B (en) * | 2013-12-24 | 2015-05-20 | 北京工业大学 | Device and method for strengthening sludge digestion and synchronously denitrifying and dephosphorizing |
| CN106746437A (en) * | 2017-02-20 | 2017-05-31 | 湖南大学 | A kind of method that utilization fermented type acid-producing bacteria processes high-temperature steam pyrohydrolysis sludge |
| CN110193271B (en) * | 2019-06-13 | 2021-07-16 | 石泰山 | Method for recycling volatile organic compounds in waste gas to serve as denitrification carbon source |
| CN116730565B (en) * | 2023-08-11 | 2023-11-21 | 福建省永建皮革科技股份有限公司 | System and method for treating tanning wastewater |
Citations (3)
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| US4318993A (en) * | 1974-12-09 | 1982-03-09 | Institute Of Gas Technology | Two phase anaerobic digester system |
| CN1766119A (en) * | 2005-08-29 | 2006-05-03 | 刘大鹏 | Production method and device of methane and hydrogen gas |
| CN1850582A (en) * | 2005-04-22 | 2006-10-25 | 中国科学院生态环境研究中心 | Heat treatment-fermented hy drogen-generating method by preparing hydrogen from residual sludge for sewage treatment plant |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4318993A (en) * | 1974-12-09 | 1982-03-09 | Institute Of Gas Technology | Two phase anaerobic digester system |
| CN1850582A (en) * | 2005-04-22 | 2006-10-25 | 中国科学院生态环境研究中心 | Heat treatment-fermented hy drogen-generating method by preparing hydrogen from residual sludge for sewage treatment plant |
| CN1766119A (en) * | 2005-08-29 | 2006-05-03 | 刘大鹏 | Production method and device of methane and hydrogen gas |
Non-Patent Citations (2)
| Title |
|---|
| 李基东.反硝化脱氮碳源研究现状.《山西建筑》.2008,第34卷(第8期),第8-9页. * |
| 王勇等.乙醇型发酵与丁酸型发酵产氢机理及能力分析.《太阳能学报》.2002,第23卷(第3期),第366-373. * |
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Owner name: CHANGCHUN LINK INSIGHT BUILDING CO., LTD. Free format text: FORMER OWNER: WANG HELI Effective date: 20130206 |
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Effective date of registration: 20130206 Address after: 130012, 169, building street, hi tech Zone, Jilin, Changchun Patentee after: Changchun Union Promotion Water Engineering Co., Ltd. Address before: 100083 School of water resources and environment, China University of Geosciences, Xueyuan Road 29, Beijing, Haidian District, Beijing Patentee before: Wang Heli |
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