CN102241462B - Bypass sludge reduction and silt separation and denitrification and dephosphorization waste water treatment system and method - Google Patents
Bypass sludge reduction and silt separation and denitrification and dephosphorization waste water treatment system and method Download PDFInfo
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Abstract
The invention provides a bypass sludge reduction and silt separation and denitrification and dephosphorization waste water treatment system and a bypass sludge reduction and silt separation and denitrification and dephosphorization waste water treatment method for solving the frequency problems of high sand content in incoming water, low volatile suspended solid (VSS)/mixed liquor suspended solids (MLSS), inadequate carbon source and the like in the conventional denitrification and dephosphorization process. The system consists of a main waste water treatment system having denitrification and dephosphorization functions and a bypass system, wherein the main waste water treatment system comprises a grit chamber and a waste water treatment system having denitrification and dephosphorization functions; and the bypass system consists of a hair separator, a sludge reduction pool, a sludge and silt separator, a silt dewatering system and a chemical dephosphorization system. In the invention, by discharging the sludge and silt and retaining slit organic matters, the silt is prevented from depositing in the waste water treatment system and the VSS/MISS ratio of the sludge in a biochemical reaction pool is improved. By returning the sludge recycled as a carbon source, a carbon source is provided for the main waste water treatment system. By applying chemical dephosphorization in the embedded bypass system, the phosphorus in urban waste water can be removed and recycled chemically at low cost.
Description
Technical field
The invention belongs to technical field of sewage; Relate to a kind of embedded bypass mud decrement, the separation of mud silt and denitrification and phosphorus removal integration Sewage treatment systems and method, be applicable to that into the water sediment concentration is high, VSS/MLSS is low, the dephosphorization denitrogenation of the insufficient sewage work of carbon source.
Background technology
In recent years along with the growth of municipal effluent generation and the raising of processing rate, also increase simultaneously and rapidly as the quantity of the by product-excess sludge of WWT.The processing and the handling problems of mud highlight.In the face of the mud that produces continually, traditional mud is terminal handle disposal options be technology, economical, or all be under suspicion aspect the environmental safety.In this case, the low sewage disposal technology of exploitation sludge yield, technical work beyond doubt with cleaner production, pollutent source reduction theory.Mainly have following problem at the mud decrement technical elements at present: (1) with regard to the mud decrement Study on Technology, numerous research at present is in the exploratory demonstration phase of laboratory lab scale, in, large-scale mud decrement engineering demonstration is very few; Its research conclusion exists certain difference and uncertainty.(2) there is contradiction between mud decrement and the traditional biological dephosphorization.Because sewage work realizes biological phosphate-eliminating to get rid of excess sludge at present.And mud decrement is to be purpose to reduce surplus sludge volume; The mud decrement effect is good more; The excess sludge that can supply biological phosphate-eliminating to get rid of is just few more, dephosphorization ability drop even completely dissolve, so mud decrement can not be guaranteed the especially good removal of phosphorus of nutritive substance in the sewage; This also is that all adopt the fluctuation of sewage treatment process effluent quality and the reason not up to standard of mud decrement technology at present.(3) can not carry out the minimizing that enriching and recovering (4) is accompanied by the excess sludge discharge amount with the form of non-residue mud to low phosphorus in the sewage; The inert, inorganic material such as the grains of sand are inevitable to be accumulated in Sewage treatment systems; Thereby make in the active sludge inorganic content in biochemical aeration tank, accumulate rising; Cause aeration tank reaction efficiency and useful volume to reduce; Having a strong impact on day by day of causing of the normal Operation Administration and Maintenance of Sewage Plant highlighted, even possibly cause the forfeiture of mud process reduction functions.
At present, silt accumulates also to have highlighted in Sewage treatment systems becomes serious problems that influence sewage treating efficiency.Some measures that sediment concentration is high in the water inlet, raising denitrogenation dephosphorizing efficient is taked (like the cancellation preliminary sedimentation tank, in order to guarantee the long sludge age of biological denitrificaion employing, chemical dephosphorization etc.) and mud decrement technology are the major causes that causes the mud silt serious.Because husky alluvial makes that the VSS/MLSS ratio of many sludge of sewage treatment plant is very low, have in addition be low to moderate 0.2 ~ 0.3.How silt is removed the research emphasis that has become the raising sewage treating efficiency from Sewage treatment systems.With regard to the technology of removing sand of present stage, its theory of removing sand all is to concentrate on the source to remove, though can reach the effect of removing silt, inevitably can lose the part carbon source, and the insufficient problem of carbon source is highlighted more.
Therefore develop to present mud decrement technology and the technological existing problem of removing sand and a kind ofly collect that mud decrement, mud silt separate, the integrated effluent disposal system and the method for synchronous denitrification dephosphorizing are significant.
Summary of the invention
To the problems referred to above, the invention provides a kind of bypass mud decrement, silt separation and denitrogenation dephosphorizing Sewage treatment systems and method.
Technical scheme of the present invention is following:
The present invention at first proposes a cover bypass mud decrement, silt separates and the denitrogenation dephosphorizing Sewage treatment systems, and it is made up of main body Sewage treatment systems and bypath system with denitrogenation dephosphorizing function.
Said main body Sewage treatment systems is made up of settling pit, denitrification dephosphorization system.
Said main body Sewage treatment systems has settling pit and denitrification dephosphorization system, and sewage inserts denitrification dephosphorization system through settling pit, and the water after denitrification dephosphorization system is handled is discharged through rising pipe; Said denitrification dephosphorization system is provided with mud internal reflux pipe, excess sludge discharge pipe, and has access to aerating system.
Said bypath system includes hair separator, mud decrement pond, mud silt separator, chemical dephosphorization pond and silt dewatering system.Wherein connect the mud decrement pond after the excess sludge discharge pipe coupling hair separator of denitrification dephosphorization system again; The mud decrement pond connects mud silt separator through mud decrement pond shore pipe; Mud silt separator is connected with denitrification dephosphorization system through the carbon source mud return line on the one hand; Connect the silt dewatering system through mud silt delivery pipe on the other hand; The silt dewatering system connects the chemical dephosphorization pond through rich phosphorus segregation liquid delivery pipe; The mud decrement pond also is connected with the chemical dephosphorization pond through rich phosphorus supernatant delivery pipe simultaneously, and the chemical dephosphorization pond takes back denitrification dephosphorization system through the supernatant return line on the one hand, discharges mud through chemical sludge reuse pipe on the other hand.
Settling pit is mainly removed the above sand grains of 0.2mm.
Denitrification dephosphorization system such as A
2/ O biochemical reaction tank+second pond, oxidation ditch+second pond, SBR with and develop the function that technology CASS etc. has denitrogenation, dephosphorization, removal organism and mud-water separation.
Hair separator: separate bigger nonreactants such as hair.
Mud decrement pond: through mud decrement measures such as acidications; The part excess sludge is cracked in the decrement pond; Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration; Help improving the separation efficiency of mud silt separator, the mud backflow after cracking simultaneously provides carbon source for system.
Mud silt separator: the mud after cracking gets into mud silt separator separates nonreactant from mud, thereby reaches the purpose that improves sludge activity.
Chemical dephosphorization pond: in the chemical dephosphorization pond,, phosphorus is removed the chemical sludge reuse from sewage through adding the method for chemical agent.
The silt dewatering system: the mud silt gets into the silt dewatering system and accomplishes dehydration, and dehydrated sludge silt water ratio is less than 80% also outward transport.
Further utilize above-mentioned Sewage treatment systems, the present invention proposes a kind of bypass mud decrement, silt separates and the denitrogenation dephosphorizing sewage water treatment method.
Present method is separated and denitrogenation dephosphorizing to realize mud decrement, mud silt through above-mentioned bypath system being embedded on the excess sludge pipeline of main body sewage treatment process system.Excess sludge is discharged in the mud decrement pond after hair separator on the excess sludge pipe is removed bigger nonreactant such as hair through being embedded in; Through mud decrement measures such as acidications; Excess sludge is cracked in the decrement pond; Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration, help improving the separation efficiency of mud silt separator.Mud backflow after cracking simultaneously provides carbon source for system.The rich phosphorus supernatant that the mud decrement pond produces enters the chemical dephosphorization pond.Mud after cracking gets into mud silt separator from the mud decrement pond, nonreactant is separated from mud, thereby reaches the purpose that improves sludge activity.The carbon source mud that mud silt separator riser comes out is back to the biochemical reaction tank of denitrification dephosphorization system, and the mud silt of the high stability that underflow opening comes out gets into the silt dewatering system.The mud silt gets into the silt dewatering system and accomplishes dehydration, and dehydrated sludge silt water ratio is less than 80% also outward transport, and rich phosphorus segregation liquid drains into the chemical dephosphorization pond.The chemical dephosphorization pond admits to the rich phosphorus liquid of mud decrement pond and silt water extracter, adds chemical dephosphorization agent and makes rich phosphorus sewage and chemical agent thorough mixing and reaction; Precipitate the completion mud-water separation at last.Supernatant is back to the biochemical reaction tank of denitrification dephosphorization system and further removes other nutritive substances, and the chemical sludge reuse.After water inlet was removed the above sand grains of 0.2mm through settling pit, the biochemical reaction tank that its water outlet gets into denitrification dephosphorization system carried out thorough mixing with internal reflux mud, carbon source mud.Under the operation scheme of anaerobic-anoxic-aerobic, accomplish denitrogenation, dephosphorization and organic removal.Accomplish mud-water separation, water outlet qualified discharge through the deposition operation at last.
Among the present invention: excess sludge is cracked in the decrement pond through mud decrement measures such as acidications; Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration; Help improving the separation efficiency of mud silt separator, the mud backflow after cracking simultaneously provides carbon source for system.Mud process mud silt separator completion silt after cracking separates with mud, and carbon source mud is back to denitrification dephosphorization system, the outward transport after the dehydration of silt dewatering system of stable mud silt.The backflow of carbon source mud not only can prevent that nonreactant such as the accumulation of sand in the main process system from reaching the active purpose of raising active sludge; Can alleviate simultaneously the carbon source competition of anaerobic phosphorus release and anoxic denitrification to a certain extent.Therefore the backflow of carbon source mud can improve the biological treatment efficient of sewage from above-mentioned two aspects, ensures effluent quality.Chemical dephosphorization technology is under the prerequisite that guarantees phosphor-removing effect; Not only can solve the contradiction between the denitrogenation dephosphorizing sludge age in contradiction and the traditional biological denitrogenation dephosphorizing process between mud decrement and the biological phosphate-eliminating, can also carry out enriching and recovering with the form of non-residue mud low phosphorus in the municipal effluent.The moudle type bypath system is embedded on the excess sludge pipeline of main body sewage treatment process system, can reduces transformation and saving cost Sewage treatment systems.To sum up, embedded bypass mud decrement, the separation of mud silt and denitrification and phosphorus removal integration sewage treatment process system and equipment are applicable to that fully into the water sediment concentration is high, VSS/MLSS is low, the dephosphorization denitrogenation of the insufficient sewage work of carbon source.
Advantage of the present invention
(1) under the prerequisite that realizes sludge reduction; Through mud decrement system and mud silt separation system excess sludge is back in the main body sewage treatment process system with the form of carbon source mud, can not only alleviates the carbon source competition of anaerobic phosphorus release and anoxic denitrification to a certain extent.Can prevent simultaneously that nonreactant such as the accumulation of sand in main body sewage treatment process system from reaching the active purpose that improves active sludge, improve the biological treatment efficient of sewage from two aspects, ensure effluent quality.
(2) contradiction between the denitrogenation dephosphorizing sludge age in the method solution mud decrement of employing chemical dephosphorization and contradiction between the biological phosphate-eliminating and the traditional biological denitrogenation dephosphorizing process ensures stable synchronous denitrification dephosphorizing effect.Simultaneously low phosphorus in the municipal effluent is carried out enriching and recovering with the form of non-residue mud.
(3) the carbon source loss of adopting the bypass type technology of removing sand to avoid the source technology of removing sand to be caused, thus denitrogenation dephosphorizing efficient improved.
(4) the moudle type bypath system is embedded on the excess sludge pipeline of main process, can reduces transformation and saving cost Sewage treatment systems.
Description of drawings
Fig. 1 is that bypass mud decrement of the present invention, mud silt separate and denitrogenation dephosphorizing Sewage treatment systems and method block diagram.
Among the figure, settling pit-1, denitrification dephosphorization system-2, hair separator-3, mud decrement pond-4, mud silt separator-5, chemical dephosphorization pond-6, silt dewatering system-7, settling pit water inlet pipe-8, settling pit rising pipe-9, denitrification dephosphorization system rising pipe-10, mud internal reflux pipe-11, excess sludge pipe-12, mud decrement pond shore pipe-13, carbon source mud return line-14, mud silt delivery pipe-15, rich phosphorus supernatant delivery pipe-16, rich phosphorus segregation liquid delivery pipe-17, supernatant return line-18, chemical sludge delivery pipe-19, aerating system-20.
Embodiment
Referring to Fig. 1 further explain Sewage treatment systems of the present invention and operation operation (is example with the cyclic activated sludge system).
Bypass mud decrement, silt separation and denitrogenation dephosphorizing Sewage treatment systems have the main body Sewage treatment systems and the bypath system of denitrogenation dephosphorizing function.
The main body Sewage treatment systems is made up of settling pit 1, denitrification dephosphorization system (CASS biochemical reaction tank) 2.
The settling pit 1 main above sand grains of 0.2mm of removing.
Said bypath system is made up of hair separator 3, mud decrement pond 4, mud silt separator 5, chemical dephosphorization pond 6, silt dewatering system 7.
Mud decrement pond 4: through mud decrement measures such as acidications; Excess sludge is cracked in the decrement pond; Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration; Help improving the separation efficiency of mud silt separator, the mud backflow after cracking simultaneously provides carbon source for system.
Mud silt separator 5: the mud after cracking gets into mud silt separator separates nonreactant from mud, thereby reaches the purpose that improves sludge activity.
Chemical dephosphorization pond 6: in the chemical dephosphorization pond,, phosphorus is removed the chemical sludge reuse from sewage through adding the method for chemical agent.
Silt dewatering system 7: the mud silt gets into the silt dewatering system and accomplishes dehydration, and dehydrated sludge silt water ratio is less than 80% also outward transport.
Pipeline comprises: settling pit water inlet pipe 8, settling pit rising pipe 9, denitrification dephosphorization system rising pipe 10, mud internal reflux pipe 11, excess sludge pipe 12, mud decrement pond shore pipe 13, carbon source mud return line 14, mud silt delivery pipe 15, rich phosphorus supernatant delivery pipe 16, rich phosphorus segregation liquid delivery pipe 17, supernatant return line 18, chemical sludge delivery pipe 19, aerating system 20.Wherein settling pit rising pipe 9 connects settling pit 1 and denitrification dephosphorization system 2; Mud internal reflux pipe 11 connects the main reaction region and the biological selecting area of denitrification dephosphorization system 2; Hair separator 3 is embedded on the excess sludge pipe 12; Excess sludge pipe 12 connects denitrification dephosphorization system 2 and mud decrement pond 4, and mud decrement pond shore pipe 13 connects mud decrement pond 4 and mud silt separator 5, and carbon source mud return line 14 connects mud silt separator 5 and denitrification dephosphorization system 2; Mud silt delivery pipe 15 connects mud silt separator 5 and silt dewatering system 7; Rich phosphorus supernatant delivery pipe 16 connects mud decrement 4 and chemical dephosphorization pond 6, and rich phosphorus segregation liquid delivery pipe 17 connects silt dewatering system 7 and chemical dephosphorization pond 6, and supernatant return line 18 connects chemical dephosphorization pond 6 and denitrification dephosphorization system 2.
It is following to utilize above-mentioned Sewage treatment systems to carry out the method for WWT:
1. water inlet gets into settling pit 1 through settling pit water inlet pipe 8, and behind the sand grains in settling pit 1 more than the removal 0.2mm, its water outlet gets into denitrification dephosphorization system 2, and carries out thorough mixing with internal reflux mud, carbon source mud.Aeration rate through control aerating system 20 makes denitrification dephosphorization system 2 move with anaerobic-anoxic-aerobic alternative mode, thereby accomplishes denitrogenation, dephosphorization and organic removal.Accomplish mud-water separation through the deposition operation at last.The water outlet qualified discharge.
2. excess sludge is discharged to the mud decrement pond 4 through excess sludge pipe 12 from denitrification dephosphorization system 2; Through mud decrement measures such as acidications; Make excess sludge cracking in the decrement pond; Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration, help improving the separation efficiency of mud silt separator.Mud backflow after cracking simultaneously provides carbon source for system.The rich phosphorus supernatant that mud decrement pond 4 produces enters chemical dephosphorization pond 6 through rich phosphorus supernatant delivery pipe 16.
3. the mud after cracking 4 gets into mud silt separators 5 through mud decrement pond shore pipe 13 from the mud decrement pond, nonreactant is separated from mud, thereby reached the purpose that improves sludge activity.Carbon source mud is back to denitrification dephosphorization system 2, and the mud silt of high stability gets into silt dewatering system 7.The sludge concentration that is got into mud silt separation system by the mud decrement pond is 10000mg/L, the residence time >=2, mud decrement pond day.
4. the mud silt gets into silt dewatering system 7 and accomplishes dehydration, and dehydrated sludge silt water ratio is less than 80% also outward transport.Rich phosphorus segregation liquid drains into chemical dephosphorization pond 6.
5. chemical dephosphorization pond 6 admits to the rich phosphorus liquid of mud decrement 4 and silt dewatering system 7.With 5mg/L as chemical dephosphorization pond 6 water outlet controlled target.System adds chemical dephosphorization agent after starting, after rich phosphorus sewage and chemical agent thorough mixing and the reaction; Precipitate the completion mud-water separation.Supernatant is back to denitrification dephosphorization system, and the chemical sludge reuse.
Concrete application example
Settling pit water outlet with big ferry, Chongqing City sewage work is a process object, and its influent quality is COD=94～803 mg/L, BOD=34～298mg/L, SS=56～1208mg/L, TP=1.12～15.8mg/L, TN=20～83mg/L, NH
3-N=6～35mg/L, the average sand cut of settling pit water outlet=108 mg/L, VSS/TSS is 0.35～0.39 in its reaction tank.CASS pond effective volume is 9.36 m
3, biological selecting area 0.416 m wherein
3, anaerobic zone 1.456 m
3, main reaction region 7.488 m
3, mud decrement pond effective volume is 1.25 m
3, chemical dephosphorization pond effective volume is 0.95 m
3Day output 10 m
3, 4 cycles of every day, 6 hours phases weekly.Operation condition is: flooding time 0.5 hour, and little aeration 2.55 hours, big aeration 1.5 hours precipitates 1 hour, draining spoil disposal 0.5 hour.The phase bath is than 0.35 weekly, and SRT is 35 days.Treat effluent COD≤30mg/L, TN≤13mg/L, NH
3-N≤4mg/L, TP≤0.5mg/L, average removal rate are respectively 90%, 74%, 86.7%, 90%, and effluent quality satisfies " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard; The mud decrement effect is 25%; VSS/TSS in the CASS pond＞0.5.
Claims (4)
1. a bypass mud decrement, silt separate and the denitrogenation dephosphorizing Sewage treatment systems, and it is made up of the main body Sewage treatment systems with denitrogenation dephosphorizing function and bypath system two portions; It is characterized in that:
Said main body Sewage treatment systems has settling pit (1) and denitrification dephosphorization system (2), and sewage inserts denitrification dephosphorization system (2) through settling pit (1), and the water after denitrification dephosphorization system (2) is handled is discharged through rising pipe (10); Said denitrification dephosphorization system (2) is provided with mud internal reflux pipe (11), excess sludge discharge pipe (12), and has access to aerating system (20);
Said bypath system includes hair separator (3), mud decrement pond (4), mud silt separator (5), chemical dephosphorization pond (6) and silt dewatering system (7);
Wherein the excess sludge discharge pipe (12) of denitrification dephosphorization system (2) connects hair separator (3) and connects mud decrement pond (4) afterwards again; Mud decrement pond (4) connects mud silt separator (5) through mud decrement pond shore pipe (13); Mud silt separator (5) is connected with denitrification dephosphorization system (2) through carbon source mud return line (14) on the one hand; Connect silt dewatering system (7) through mud silt delivery pipe (15) on the other hand; Silt dewatering system (7) connects chemical dephosphorization pond (6) through rich phosphorus segregation liquid delivery pipe (17); Mud decrement pond (4) also are connected with chemical dephosphorization pond (6) through rich phosphorus supernatant delivery pipe (16) simultaneously; Chemical dephosphorization pond (6) takes back denitrification dephosphorization system (2) through supernatant return line (18) on the one hand, discharges mud through chemical sludge reuse pipe (19) on the other hand.
2. the method for utilizing the described Sewage treatment systems of claim 1 to carry out WWT, its treating processes is following:
1. water inlet gets into settling pit (1) through settling pit water inlet pipe (8), and behind the removal sand grains, its water outlet gets into the biochemical reaction tank of denitrification dephosphorization system (2) in settling pit (1), and carries out thorough mixing with internal reflux mud, carbon source mud; Aeration rate through control aerating system (20) makes the biochemical reaction tank of denitrification dephosphorization system (2) move with anaerobic-anoxic-aerobic mode, thereby accomplishes denitrogenation, dephosphorization and organic removal; Accomplish mud-water separation, water outlet qualified discharge through the deposition operation at last;
2. excess sludge is discharged in the mud decrement pond (4) after removing bigger nonreactant through the hair separator (3) on the excess sludge discharge pipe (12); Through the measure of acidication mud decrement; Excess sludge is cracked in mud decrement pond (4); Make the silt of being carried secretly in the active sludge peel off out behind the sludge disintegration, help improving the separation efficiency of mud silt separator, the mud backflow after cracking simultaneously provides carbon source for system; The rich phosphorus supernatant that mud decrement pond (4) produces enters chemical dephosphorization pond (6) through rich phosphorus supernatant delivery pipe (16);
3. the mud after cracking gets into mud silt separator (5) from mud decrement pond (4) through mud decrement pond shore pipe (13), and nonreactant is separated from mud; Carbon source mud is back to the biochemical reaction tank of denitrification dephosphorization system (2), and the mud silt of high stability gets into silt dewatering system (7);
4. the mud silt gets into silt dewatering system (7) and accomplishes dehydration, and dehydrated sludge silt water ratio is less than 80% also outward transport, and rich phosphorus segregation liquid drains into chemical dephosphorization pond (6);
5. the rich phosphorus liquid to mud decrement pond (4) and silt dewatering system (7) is admitted in chemical dephosphorization pond (6), adds chemical dephosphorization agent, precipitates the completion mud-water separation after rich phosphorus sewage and chemical agent thorough mixing and the reaction; Supernatant is back to the biochemical reaction tank of denitrification dephosphorization system (2) and further removes other nutrition, and the chemical sludge reuse.
3. the method for utilizing Sewage treatment systems to carry out WWT according to claim 2; It is characterized in that: said step 5. add chemical dephosphorization agent be with chemical dephosphorization pond supernatant phosphorus concentration be 5mg/L as the chemical dephosphorization controlled target, but not qualified discharge concentration.
4. the method for utilizing Sewage treatment systems to carry out WWT according to claim 2 is characterized in that: the sludge concentration that is got into mud silt separation system by the mud decrement pond is 10000mg/L, the residence time >=2, mud decrement pond day.
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| CN102701514B (en) * | 2012-03-20 | 2013-12-25 | 刘智晓 | Method for improving treatment efficiency of sewage plant by utilizing bypass sludge activity enhancing technology |
| CN102659288B (en) * | 2012-05-21 | 2013-09-11 | 重庆大学 | Low-carbon-source sewage treatment system for reinforcing denitrification and dephosphorization functions and method |
| CN102964032B (en) * | 2012-11-23 | 2014-04-02 | 北京市可持续发展促进会 | Device and method for bypass phosphorus recovery of town sewage treatment plant |
| CN103961912B (en) * | 2014-05-21 | 2016-01-06 | 重庆大学 | Husky device washed by machinery |
| CN104230123B (en) * | 2014-09-29 | 2016-02-03 | 重庆大学 | Remove the device of inorganic particle in Sewage treatment systems |
| CN104817237B (en) * | 2015-05-15 | 2017-05-24 | 重庆交通大学 | Biological sludge zero-discharge sewage treatment plant and method |
| CN105016594B (en) * | 2015-08-12 | 2017-07-04 | 嘉诚环保工程有限公司 | The processing method of nutriment and special high-pressure alternating-current pulse sludge disintegration device in excess sludge |
| CN105621603B (en) * | 2016-01-05 | 2018-06-26 | 长沙奥邦环保实业有限公司 | Sewage biological treatment system returned sludge eluriates technique |
| CN108101332B (en) * | 2017-12-18 | 2021-06-29 | 西南石油大学 | Method and equipment for reducing sludge by compounding ultrasonic and ozone coupled with carrousel oxidation ditch |
| CN110282841A (en) * | 2019-08-06 | 2019-09-27 | 深圳市深水水务咨询有限公司 | A kind of municipal sludge front end decrement and middle-end volume reduction system |
| CN111018265A (en) * | 2019-12-31 | 2020-04-17 | 上海坤工环境科技有限公司 | Adaptive variable-mode sewage treatment method for combined sewage system |
| CN111138041A (en) * | 2020-01-22 | 2020-05-12 | 大连安能杰科技有限公司 | Sewage treatment system for carbon source circulating sludge reduction and sewage treatment method using system |
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