CN206654774U - A kind of compound type sludge is reduced anaerobic digester - Google Patents
A kind of compound type sludge is reduced anaerobic digester Download PDFInfo
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- CN206654774U CN206654774U CN201720168338.7U CN201720168338U CN206654774U CN 206654774 U CN206654774 U CN 206654774U CN 201720168338 U CN201720168338 U CN 201720168338U CN 206654774 U CN206654774 U CN 206654774U
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Abstract
The utility model discloses a kind of compound type sludge to be reduced anaerobic digester, and the composite anaerobic pond includes hydrolysis area and anaerobic zone, and the hydrolysis area includes hydrolysis A areas and hydrolysis B areas；The anaerobic zone includes anaerobism A areas and anaerobism B areas.The water inlet sparge pipe is separately positioned on hydrolysis area water inlet end and anaerobic zone water inlet end.The hydrolysis area and anaerobic zone set sludge return pipe respectively.Hydrolysis area sludge return pipe is used in combination with biochemical system excess sludge pipeline.By adjusting residual sludge reflux amount and water inlet water distribution quantity, each functional areas is strictly distinguished, control the living environment that Institute of Micro-biology adapts in two regions, it is maximized to play hydrolysis function and anaerobic digestion function.The organic matters such as the microorganism endogenous respiration product to be flowed back by hydrolyzing, digesting excess sludge, so as to reach the purpose of mud decrement.The utility model have the advantages that applicability it is wide, it is efficient, compact-sized, energy-conservation.
Description
Technical field
The utility model belongs to field of Environment Protection, relates generally to a kind of reduce the compound of sewage treatment plant's excess sludge production
Type anaerobic digester.
Background technology
At present, wastewater treatment mainly uses activated sludge process, and activated sludge process sludge yield is big, processing and disposal costs
Height, sludge turn into one of domestic and international sewage treatment plant's urgent problem to be solved.Since 2003, the excess sludge production in China
Amount has just exceeded 10,000,000 t (State Statistics Bureau etc., 2010)；As municipal sewage plant is extensive the Eleventh Five-Year Plan period
The t of China's sludge yield about 21,880,000 in 2011 is built, China's sludge yield is more than 30,000,000 t within 2015.If excess sludge without
Effectively processing disposal will produce secondary pollution, direct or indirect threatening environment safety and public health, while make sewage disposal
The environmental benefit of facility substantially reduces.Excess sludge reduction technology receives the extensive concern of domestic and international researcher, main at present
Including physical method, chemical method and biological method.Because energy is larger needed for physics mode, chemical mode needs what is put into
Chemical substance may bring secondary pollution to environment, there are problems that of both economy and environment using biological mode to sludge
It is reduced, energy consumption is low, does not produce secondary pollution, is attracted attention as a kind of ecological engineering technology.
Can be by sludge according to the microorganism worked during mud decrement and the environment maintained (aerobic/anaerobic)
Biological decrement mode is divided into：The aerobic sigestion decrement of sludge, the anaerobic digestion of sludge are reduced and ingested using microfauna to dirt
Mud carries out being reduced 3 kinds of modes.
The method of wherein aerobic sigestion decrement is less efficient, and the decrement cycle is longer, is difficult to realize scale；Microorganism ingests
Sludge reduction method also in conceptual phase, is restricted, generalization is poor by a variety of restrictive conditions at present.
Anaerobic sludge digestion is a multistage complex process, and there is respective characteristic micropopulation in each stage, respectively
Not only connected each other between stage but also mutually restricted, in sludge anaerobic digestion system, various bacteriums in the range of the acid-base value of adaptation,
Only allow to fluctuate near neutral.Change of the microorganism to pH is very sensitive.Hydrolysis adapts to zymophyte and production hydrogen, acetogen
PH scopes be 5.0~6.5, methane backeria adapt to pH scopes be 6.6~7.5.If hydrolysis acidification and acetoxylation process is anti-
Speed is answered to exceed methanation speed, pH will be reduced, and so as to influence the living environment of methanogen, and then influenceed sludge and detested
Oxygen digestion effect.
Utility model content
In view of this, the utility model provides a kind of compound type sludge decrement anaerobic digester, to realize anaerobic digestion
During, various bacteriums improve anaerobic reaction efficiency to the demand of varying environment.
A kind of compound type sludge decrement anaerobic digester, it is characterized in that, including the hydrolysis area being sequentially communicated and anaerobism
Area；
The hydrolysis area includes hydrolysis unit, and hydrolysis unit is divided into hydrolysis A units and water by dividing plate
Solution reaction unit B, hydrolysis A units connect with hydrolysis unit B bottom；Hydrolysis area is provided with water inlet sparge pipe (1), hydrolysis
Area's sludge return pipe (3), hydrolysis area sludge reflux pump (2)；
The anaerobic zone includes anaerobic reaction unit, and anaerobic reaction unit is divided into anaerobic reaction A units by dividing plate and detested
Oxygen reacts unit B, and anaerobic reaction A units connect with anaerobic reaction unit B bottom；Anaerobic zone is provided with anaerobic zone sludge return pipe
And anaerobic zone sludge reflux pump (4) (5)；
Also include residual sludge reflux pipe (7), the residual sludge reflux pipe (7) and hydrolysis area sludge return pipe (3)
Connection.
Wherein, the hydrolysis area sludge return pipe (3) and anaerobic zone sludge return pipe (5) stretch into one end of reaction zone
It is respectively equipped with baffle plate (6).
A kind of described compound type sludge decrement anaerobic digester includes, sewage sparge pipe, hydrolyzing sludge return duct, anaerobism
Mud return line, excess sludge discharge pipeline.Two large divisions, i.e. hydrolysis acidification and anaerobic digestion can be divided into composite anaerobic pond；
Hydrolysis stage hydrolase as caused by anaerobe and aerobic-anaerobic microbe comes residual sludge reflux
The process of acidifying is hydrolyzed in the organic matters such as microbial metabolic products, microorganism endogenous respiration residue.This stage is mainly made
With being to change into the VSS in excess sludge for dissolved organic matter, acidizing product quilt in the presence of oxygen acetogen is produced
Acetic acid, hydrogen, carbonic acid and new cellular material are further converted to, so as to reach mud decrement.During should strictly control
PH value in 5.0-6.5, if due to when acidization does not cause thoroughly the pH value to raise, can be by suitably reducing residual sludge reflux
Amount, hydrolysis sparge pipe inflow is reduced, ensures enough hydrolysis acidification residence times, makes acidization more thorough.Conversely, pH value
During reduction, residual sludge reflux amount, increase hydrolysis sparge pipe inflow can be increased.
Hydrolysis area water outlet slant acidity, anaerobic digestion area anaerobic environment is influenceed, therefore set anaerobism to match somebody with somebody in anaerobism A areas water inlet end
Water pipe, using neutralizing hydrolysis area water outlet of intaking, the pH value for entering anaerobic zone is set to be higher than 6.6.
In the anaerobic digestion stage, by methane-producing bacteria further by the dissolved organic matters such as aliphatic acid, amino acid point
Solution is into methane, carbon dioxide etc..
The composite anaerobic digester, hydrolyzing sludge return duct and anaerobic sludge return duct, residual sludge reflux pipe are set
With hydrolyzing sludge return duct common conduit.
Composite anaerobic pond is divided into two functional units, hydrolysis area and anaerobic zone, each functional areas volume by the utility model
Than for 1：1, each functional areas are subdivided into two reaction zones, and each reaction zone volumetric ratio is 3:2.Total waterpower of compound anaerobic pond
Residence time is not less than 8 hours, and the total residence time of hydrolytic tank is not less than 4 hours.By flowing back, aerobic sludge supplements hydrolytic tank
Sludge concentration, wherein suspended sludge concentration (MLSS) control in 10-15g/L.Due to being formed in hydrolysis area different spaces region
And the environment of oxygen-anaerobism, in import suspended sludge area, initial sludge forms aerobic area after being mixed with sewage, controls dissolved oxygen
(DO) it is 0.1-0.3mg/L, as water (flow) direction dissolved oxygen gradually reduces, to hydrolysis B areas, control dissolved oxygen (DO) is less than
0.1mg/L.In this process, hydrolytic tank forms substantial amounts of and oxygen bacterium and anaerobic bacteria, passes through simultaneous oxygen bacterium-anaerobic bacteria of high concentration
Cohydrolysis acts on, and BOD/COD ratios can improve 40-80% after general water outlet, to ammonia nitrogen removal frank up to 10%-30%.
Described hydrolysis divides into hydrolysis A areas and hydrolyzes B areas, because backflow excess sludge enters water in the hydrolysis A areas
Xie Qu, with the dissolved oxygen carried in hydrolysis zone hybrid reaction, phegma and the dissolving remained in backflow excess sludge of intaking
Oxygen, is formed and oxygen-anaerobic zone in this region, and microbial population classification is better than common hydrolysis acidification pool, can be more efficient enter water-filling
Solution reaction, water outlet flow into hydrolysis B areas, and hydrolysis B areas are without water inlet turbulent flow interference, and suspended sludge flow velocity is less than 0.25m/s, in this region
Muddy water natural layering, hydrolysis area bottom are provided with hydrolyzing sludge reflux line, are connected with excess sludge pipeline, are back to hydrolysis A areas
Middle and lower part, supernatant flow into anaerobic zone by downflow weir.
The anaerobism divides into anaerobism A areas and anaerobism B areas, and the sewage in anaerobism A areas is entered by hydrolyzing B areas, and B/C is obtained greatly
Width is lifted, and most of organic matter is VFA.In anaerobism A areas and anaerobism B, methane backeria and other anaerobic bacterias change into organic matter
For methane, carbon dioxide and water.Suspended sludge flow velocity is less than 0.25m/s in anaerobism B areas, in this region muddy water natural layering, detests
Oxygen area bottom is provided with independent sludge return pipe, is back in the middle part of anaerobism A areas, and supernatant is flowed at subsequent biochemical by downflow weir
Manage unit.
Each functional areas are made strictly to distinguish, it is Bu Tong micro- in each functional areas to control with residual sludge reflux amount by water distribution quantity
The growing environment of biology.
Circulated more than so that two different functional areas are formed in compound anaerobic pond, realize that biochemistry pool is intake
Water quality is uniform, the decrement discharge of biochemical system excess sludge.
Compared with prior art, advantage of the present utility model is mainly reflected in：
1st, simple in construction, operation is convenient.
2nd, sludge reduction degree is high, and the technology includes the depth of the mud decrement and excess sludge in wastewater treatment process
Processing, and realize the circulation of sewage and Treatment of Sludge.
3rd, operating cost is low, low compared to large-scale sludge dispoal equipment, the capital expenditure of the technology.Meanwhile sludge
A large amount of reductions cause sludge subsequent treatment energy consumption and cost to reduce.
Brief description of the drawings
Fig. 1 is technique plan of the present utility model；
Fig. 2 is Fig. 1 A-A profiles；
Reference in figure
1st, water inlet sparge pipe 2, hydrolysis area sludge reflux pump 3, hydrolysis area sludge return pipe
4th, anaerobic zone sludge reflux pump 5, anaerobic zone sludge return pipe 6, water distribution baffle plate
7th, residual sludge reflux pipe
Embodiment
Sewage enters hydrolysis area and anaerobic zone in composite anaerobic pond according to a certain percentage through sparge pipe of intaking；
Hydrolysis A areas and hydrolysis B areas are divided into described hydrolysis.
The hydrolysis area mud return line shares a pipeline with residual sludge reflux pipe, under pipeline access is hydrolyzed in A areas
Portion.
The water distribution baffle plate is circle, in the presence of the reaction force that sludge water distribution baffle plate is stopped, realizes sludge in water
Circulation inside A areas is solved, sewage is fully mixed.
The hydrolysis A areas connect with hydrolysis B areas bottom.
The hydrolysis B areas are less than 0.25m/s, divided naturally in this region muddy water without water inlet turbulent flow interference, suspended sludge flow velocity
Layer, hydrolysis area bottom are provided with hydrolyzing sludge reflux line, are connected with excess sludge pipeline, are back to hydrolysis A areas middle and lower part, hydrolysis
Area goes out supernatant and flows into anaerobic zone by downflow weir.
The anaerobism divides into anaerobism A areas and anaerobism B areas.
The hydrolysis area goes out the sewage that supernatant enters anaerobism A areas by hydrolysis B areas, and B/C is increased dramatically, big portion
It is VFA to divide organic matter.In anaerobism A areas and anaerobism B, organic matter is transformed into methane, dioxy by methane backeria and other anaerobic bacterias
Change carbon and water.
The anaerobism A areas connect with anaerobism B areas bottom.
Suspended sludge flow velocity is less than 0.25m/s in the anaerobism B areas, in this region muddy water natural layering, anaerobic zone bottom
Provided with independent sludge return pipe, it is back in the middle part of anaerobism A areas, anaerobic zone goes out supernatant and flows into subsequent biochemical by downflow weir
Processing unit.
Claims (2)
1. a kind of compound type sludge is reduced anaerobic digester, it is characterized in that, including the hydrolysis area and anaerobic zone being sequentially communicated；
The hydrolysis area includes hydrolysis unit, and hydrolysis unit is divided into hydrolysis A units by dividing plate and hydrolysis is anti-
Unit B is answered, hydrolysis A units connect with hydrolysis unit B bottom；Hydrolysis area is provided with water inlet sparge pipe (1), hydrolysis area dirt
Mud reflux line (3), hydrolysis area sludge reflux pump (2)；
The anaerobic zone includes anaerobic reaction unit, and anaerobic reaction unit is divided into anaerobic reaction A units by dividing plate and anaerobism is anti-
Unit B is answered, anaerobic reaction A units connect with anaerobic reaction unit B bottom；Anaerobic zone is provided with anaerobic zone sludge return pipe (5)
With anaerobic zone sludge reflux pump (4)；
Also include residual sludge reflux pipe (7), the residual sludge reflux pipe (7) connects with hydrolysis area sludge return pipe (3).
2. a kind of compound type sludge decrement anaerobic digester according to claim 1, it is characterized in that, the hydrolysis area sludge
One end that reflux line (3) and anaerobic zone sludge return pipe (5) stretch into reaction zone is respectively equipped with baffle plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720168338.7U CN206654774U (en) | 2017-02-24 | 2017-02-24 | A kind of compound type sludge is reduced anaerobic digester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720168338.7U CN206654774U (en) | 2017-02-24 | 2017-02-24 | A kind of compound type sludge is reduced anaerobic digester |
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| CN206654774U true CN206654774U (en) | 2017-11-21 |
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| CN201720168338.7U Expired - Fee Related CN206654774U (en) | 2017-02-24 | 2017-02-24 | A kind of compound type sludge is reduced anaerobic digester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587345A (en) * | 2017-02-24 | 2017-04-26 | 宜兴市建邦环境投资有限责任公司 | Composite type sludge reduction anaerobic digester |
-
2017
- 2017-02-24 CN CN201720168338.7U patent/CN206654774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587345A (en) * | 2017-02-24 | 2017-04-26 | 宜兴市建邦环境投资有限责任公司 | Composite type sludge reduction anaerobic digester |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20190224 |