CN101880118A - Energy reclaiming sludge reduction method - Google Patents
Energy reclaiming sludge reduction method Download PDFInfo
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- CN101880118A CN101880118A CN2010101048457A CN201010104845A CN101880118A CN 101880118 A CN101880118 A CN 101880118A CN 2010101048457 A CN2010101048457 A CN 2010101048457A CN 201010104845 A CN201010104845 A CN 201010104845A CN 101880118 A CN101880118 A CN 101880118A
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
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- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
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Abstract
The invention provides an energy reclaiming sludge reduction method in order to overcome the defects that the conventional sludge reduction technology has high running cost, long treatment period and the like. Thermal hydrolysis serving as pretreatment is coupled with two-phase anaerobic digestion to perform reduction treatment on the excess sludge. Ethanol type zymophyte is cultured and domesticated by using the excess sludge after the thermal hydrolysis pretreatment as matrix, an acid generating phase is controlled at an ethanol type fermentation stage, ethanol type fermentation products mainly comprise ethanol, acetic acid and hydrogen, and the ethanol type fermentation products after entering a methane generating phase can be easily utilized by methane generating bacteria and transformed into methane. The method can effectively improve the sludge reduction effect, and can reclaim clean energy such as hydrogen, methane and the like.
Description
Technical field
The present invention relates to a kind of energy reclaiming sludge reduction method, belong to the solid waste disposal technical field.
Background technology
Along with the quickening and the fast development of society of Urbanization in China, treatment rate of domestic sewage improves gradually.Country has also promoted the development of sewage treatment industry to the increase of environmental improvement dynamics of investment, and meanwhile, sewage treatment process has also produced a large amount of excess sludges.According to statistics, the annual dewatered sludge of water ratio 80% that produces in the whole nation is above 1,000 ten thousand tons.Contain multiple harmful substances in the mud, as heavy metal ion, hardly degraded organic substance, persistent organism and pathogeny microorganism etc., the strictness of relevant environment standard and laws and regulations restriction in addition, the processing of mud and disposal have become a great problem of environmental area.Therefore, exploiting economy, sludge reduction technology have efficiently become the desirable approach that solves the excess sludge problem.
Excess sludge reduction is handled and mainly is divided into aerobic sigestion and anaerobic digestion, aerobic sigestion is because its energy consumption is big, efficient is low now seldom to be studied and uses, research about mud decrement at present mainly concentrates in the anaerobic digestion, to excess sludge anaerobic digestion research mainly is the anaerobic digestion performance that improves mud with different pretreatment modes, make it reach the purpose that improves mud decrement efficient, and the operation scheme of anaerobic digestion is not done deep research.Shortcomings such as though pretreated mud mud decrement effect after anaerobic digestion increases, and the ubiquity digestion rate is slow, the residence time is long, processing efficiency is low.
Summary of the invention
In order to overcome shortcomings such as the digestion rate that the traditional sludge anaerobic digestion process exists is slow, the residence time is long, processing efficiency is low, the present invention adopts thermal hydrolysis as pretreatment technology and TPAD technology coupled method, carries out energy recovery when excess sludge reduction is handled.
A kind of energy reclaiming sludge reduction method, by the thermal hydrolysis reactor, produce sour phase reactor, product methane phase reactor, hydrogen gas recovering device and methane recovery device etc. and constitute, it is characterized in that: sewage plant excess sludge is carried out pre-treatment through the thermal hydrolysis reactor improve anaerobic digestion performance of sludge, handle back mud and carry out decrement, and gaseous product in its digestive process is recycled through follow-up TPAD reactor.
The thermal hydrolysis reactor is the multiparameter automatic control system, and the heat-treat condition of excess sludge is as follows, 110 ℃～200 ℃ of thermal treatment temps, and pressure 600～2500kPa, the thermal hydrolysis time is 15～60min.
Producing sour phase reactor receives through the pretreated mud of thermal hydrolysis, by the temperature of regulate producing sour phase be that 31～36 ℃ or 50～55 ℃, pH value are 4.5～6.0, redox potential is-300～-100mV, and effectively control concentration of substrate, organic loading, hydraulic detention time and basicity, be ethanol-type fermentation to guarantee acid formers to the pathways metabolism of excess sludge.
The fermentation after product enters and produces the methane phase reactor, and the temperature that the methane phase is produced in control is that 31～36 ℃, pH value are 6.5～7.5, redox potential is-400～-100mV.Be mainly materials such as ethanol, acetate because of the ethanol-type fermentation product, be easier to be utilized by methanogen, make and produce the raising of methane efficient, gas production rate increases, thereby has effectively improved mud decrement efficient.
In the TPAD process, will produce methane that hydrogen that acid produces mutually and product methane produces mutually as the energy recovery of purifying.
Sour phase reactor of product of the present invention and product methane phase reactor are the fully mixing reactor, adopt whipping appts in the reactor, strengthen mass transfer reaction and separation efficiency.
Beneficial effect of the present invention
1, the present invention adopts the pretreatment technology of pyrohydrolytic method as follow-up TPAD, not only can promote the dissolving of mud cell, and the intermediate product that forms behind the mud thermal hydrolysis is more suitable for the matrix as microorganism growth, improved the anaerobic digestion performance of mud effectively.
2, the present invention can pass through with the thermal hydrolysis product as matrix, carry out process optimization mutually to producing acid, the pathways metabolism of control acid formers is an ethanol-type fermentation, and for follow-up methanogen provides simple matrix such as ethanol, acetate, and hydrogen can be used as clean energy and recycles in the product.
3, after the ethanol-type fermentation end products entered into and produces the methane phase reactor, matrix was more easily utilized by methanogen, and maximizing is realized mud decrement, can be used as fuel or the use of generating raw material simultaneously after the methane recovery in the product.
Description of drawings:
Fig. 1 is a kind of process schematic representation of energy reclaiming sludge reduction method.
The number in the figure explanation:
1, advance mud pipe 2, thermal hydrolysis reactor 3, advance the mud pipe
4, produce sour phase reactor 5, hydrogen collection device 6, advance the mud pipe
7, produce methane phase reactor 8, methane collection device 9, mud mouth
Embodiment
Specify embodiments of the present invention according to Fig. 1:
The municipal effluent plant excess sludge at first enters thermal hydrolysis reactor (2) through advancing mud pipe (1), and controlled temperature is between 110 ℃～200 ℃, and pressure is between 600～2500kPa, and the reaction times is under the condition of 15～60min excess sludge to be carried out pre-treatment; Excess sludge after the thermal hydrolysis processing is entered product sour phase reactor (4) by advancing mud pipe (3), regulating the temperature of producing sour phase is 31～36 ℃ or 50～55 ℃, the pH value is 4.5～6.0, redox potential is-300～-100mV, and effectively control concentration of substrate, organic loading, hydraulic detention time and basicity, to produce acid and be controlled at the ethanol-type fermentation stage mutually, after the reaction hydrogen in the product is reclaimed by hydrogen collection device (5), other products enter airtight product methane phase reactor and produce methane reaction by advancing mud pipe (6), methane in the gaseous product is by methane collection device (8) recovery of purifying, and other product discharges through shore pipe (9).
Claims (6)
1. energy reclaiming sludge reduction method, it by the thermal hydrolysis reactor, produce sour phase reactor, product methane phase reactor, hydrogen gas recovering device and methane recovery device etc. and constitute, it is characterized in that: sewage plant excess sludge is carried out pre-treatment through the thermal hydrolysis reactor improve anaerobic digestion performance of sludge, handle back mud and carry out decrement, and gaseous product in its digestive process is recycled through follow-up TPAD reactor.
2. energy reclaiming sludge reduction method according to claim 1, it is characterized in that: described thermal hydrolysis reactor is the multiparameter automatic control system, the thermal hydrolysis condition of excess sludge is as follows, 110 ℃～200 ℃ of thermal treatment temps, pressure 600～2500kPa, the thermal hydrolysis time is 15～60min.
3. energy reclaiming sludge reduction method according to claim 1, it is characterized in that: by the temperature of regulate producing sour phase be that 31～36 ℃ or 50～55 ℃, pH value are 4.5～6.0, redox potential is-300～-100mV, and effectively control concentration of substrate, organic loading, hydraulic detention time and basicity, be ethanol-type fermentation to guarantee acid formers to the pathways metabolism of excess sludge.
4. energy reclaiming sludge reduction method according to claim 1 is characterized in that: the temperature of producing the methane phase is that 31～36 ℃, pH value are 6.5～7.5, redox potential is-400～-100mV.
5. energy reclaiming sludge reduction method according to claim 1 is characterized in that: will produce hydrogen that acid produces mutually with produce methane mutually in the methane of generation as the energy recovery of purifying.
6. energy reclaiming sludge reduction method according to claim 1 is characterized in that: sour phase reactor of described product and product methane phase reactor are the fully mixing reactor, adopt whipping appts in the reactor, strengthen mass transfer reaction and separation efficiency.
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| CN2010101048457A CN101880118A (en) | 2010-02-03 | 2010-02-03 | Energy reclaiming sludge reduction method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492726A (en) * | 2011-11-21 | 2012-06-13 | 浙江大学 | Method and device for producing hydrogen and methane through fermentation of residual sludge |
| CN102492727A (en) * | 2011-12-08 | 2012-06-13 | 杭州迪利生态循环经济工程有限公司 | Method for preparing hydrogen and methane step by step through anaerobic fermentation of excess sludge of sewage treatment |
| CN102775031A (en) * | 2012-06-26 | 2012-11-14 | 深圳市环源科技发展有限公司 | Treating method of sludge through catalysis and double thermal hydrolysis by adding alkali and acid |
| CN103121784A (en) * | 2012-06-26 | 2013-05-29 | 深圳市环源科技发展有限公司 | Method for treatment and comprehensive utilization of sludge based on low-pressure catalytic thermal hydrolysis and application of method |
| CN103121782A (en) * | 2012-06-26 | 2013-05-29 | 深圳市环源科技发展有限公司 | Low-pressure thermal-hydrolysis sludge treatment method and application thereof |
| CN103172242A (en) * | 2013-03-04 | 2013-06-26 | 同济大学 | Method for improving methanogenesis of residual sludge by heat and alkali combined pretreatment |
| CN103613261A (en) * | 2013-11-19 | 2014-03-05 | 同济大学 | Thermal alkaline enhanced three-stage municipal sludge anaerobic digestion method |
| CN104909533A (en) * | 2015-07-08 | 2015-09-16 | 安徽东华环境市政工程有限责任公司 | Method for degrading fluoroquinolone antibiotics in sludge through pyrohydrolysis pretreatment and anaerobic digestion |
| CN105060622A (en) * | 2015-07-29 | 2015-11-18 | 吉林建筑大学 | Method for simultaneous removal of carbon, nitrogen and phosphorus in tri-sludge sewage and stabilization treatment of sludge |
| CN107352769A (en) * | 2017-09-12 | 2017-11-17 | 张易凡 | A kind of municipal sludge anaerobic digestion device and technique based on ethanol-type fermentation pretreatment |
| CN107555591A (en) * | 2017-09-15 | 2018-01-09 | 大连理工大学 | A kind of diphasic anaerobic processing unit and technique that direct inter-species electron transmission is built based on ethanol-type fermentation |
| CN110655298A (en) * | 2019-09-24 | 2020-01-07 | 清华大学深圳国际研究生院 | Method for treating sludge hydrolysate and recovering fungi thallus by using fungi |
| CN115231781A (en) * | 2022-08-08 | 2022-10-25 | 阳城县安阳污水处理有限公司 | Sewage treatment process with low sludge yield |
-
2010
- 2010-02-03 CN CN2010101048457A patent/CN101880118A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492726A (en) * | 2011-11-21 | 2012-06-13 | 浙江大学 | Method and device for producing hydrogen and methane through fermentation of residual sludge |
| CN102492727A (en) * | 2011-12-08 | 2012-06-13 | 杭州迪利生态循环经济工程有限公司 | Method for preparing hydrogen and methane step by step through anaerobic fermentation of excess sludge of sewage treatment |
| CN102775031B (en) * | 2012-06-26 | 2015-02-25 | 深圳市环源科技发展有限公司 | Treating method of sludge through catalysis and double thermal hydrolysis by adding alkali and acid |
| CN103121782B (en) * | 2012-06-26 | 2015-10-28 | 深圳市环源科技发展有限公司 | Mud low pressure hot water solution treatment process and application thereof |
| CN103121782A (en) * | 2012-06-26 | 2013-05-29 | 深圳市环源科技发展有限公司 | Low-pressure thermal-hydrolysis sludge treatment method and application thereof |
| CN102775031A (en) * | 2012-06-26 | 2012-11-14 | 深圳市环源科技发展有限公司 | Treating method of sludge through catalysis and double thermal hydrolysis by adding alkali and acid |
| CN103121784A (en) * | 2012-06-26 | 2013-05-29 | 深圳市环源科技发展有限公司 | Method for treatment and comprehensive utilization of sludge based on low-pressure catalytic thermal hydrolysis and application of method |
| CN103172242A (en) * | 2013-03-04 | 2013-06-26 | 同济大学 | Method for improving methanogenesis of residual sludge by heat and alkali combined pretreatment |
| CN103172242B (en) * | 2013-03-04 | 2014-12-10 | 同济大学 | Method for improving methanogenesis of residual sludge by heat and alkali combined pretreatment |
| CN103613261A (en) * | 2013-11-19 | 2014-03-05 | 同济大学 | Thermal alkaline enhanced three-stage municipal sludge anaerobic digestion method |
| CN104909533A (en) * | 2015-07-08 | 2015-09-16 | 安徽东华环境市政工程有限责任公司 | Method for degrading fluoroquinolone antibiotics in sludge through pyrohydrolysis pretreatment and anaerobic digestion |
| CN104909533B (en) * | 2015-07-08 | 2017-04-26 | 安徽东华环境市政工程有限责任公司 | Method for degrading fluoroquinolone antibiotics in sludge through pyrohydrolysis pretreatment and anaerobic digestion |
| CN105060622A (en) * | 2015-07-29 | 2015-11-18 | 吉林建筑大学 | Method for simultaneous removal of carbon, nitrogen and phosphorus in tri-sludge sewage and stabilization treatment of sludge |
| CN105060622B (en) * | 2015-07-29 | 2017-03-08 | 吉林建筑大学 | Three mud and sewage carbon nitrogen phosphorus remove and sludge stabilization treatment method simultaneously |
| CN107352769A (en) * | 2017-09-12 | 2017-11-17 | 张易凡 | A kind of municipal sludge anaerobic digestion device and technique based on ethanol-type fermentation pretreatment |
| CN107555591A (en) * | 2017-09-15 | 2018-01-09 | 大连理工大学 | A kind of diphasic anaerobic processing unit and technique that direct inter-species electron transmission is built based on ethanol-type fermentation |
| CN110655298A (en) * | 2019-09-24 | 2020-01-07 | 清华大学深圳国际研究生院 | Method for treating sludge hydrolysate and recovering fungi thallus by using fungi |
| CN115231781A (en) * | 2022-08-08 | 2022-10-25 | 阳城县安阳污水处理有限公司 | Sewage treatment process with low sludge yield |
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Open date: 20101110 |