CN1884135A - Device for reducing excess sludge output by using predator - Google Patents
Device for reducing excess sludge output by using predator Download PDFInfo
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- CN1884135A CN1884135A CN 200610010265 CN200610010265A CN1884135A CN 1884135 A CN1884135 A CN 1884135A CN 200610010265 CN200610010265 CN 200610010265 CN 200610010265 A CN200610010265 A CN 200610010265A CN 1884135 A CN1884135 A CN 1884135A
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- vitellarium
- microfauna
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Abstract
The invention discloses a mud and effluent disposing device through biological predator, which comprises the following parts separated by baffle (14) in the device: microbe growing region, mud separating region (6) and hypoxic region (7), wherein the bottom of microbe growing region possesses pipe-typed aerator (9) within deflector (13); the filler is filled between deflector (13) and baffle (14); the microbe growing region connects mud separating region (6) through hole on the baffle (14); the mud separating region (6) connects hypoxic region (7) through pipe (10). The invention removes organics and mud in the effluent, which is benefit to decrease phosphor.
Description
Technical field
The present invention relates to a kind of biotechnology of utilizing and dispose of sewage and the device of mud particularly a kind of device that utilizes the microorganism predation method to reduce surplus sludge volume.
Background technology
Activated sludge process is current most widely used biological method for treating waste water, but a large amount of excess sludge of while by-product.The processing and the disposal costs of excess sludge account for 25%～40% of sewage work's overall running cost at present, along with the popularizing of sewage treatment facility, the increase of treatment capacity, the raising of handling standard and the expansion of processing capacity, the generation of excess sludge will increase considerably.Therefore, how reasonably solving the mud problem, has been one of current environmental issue that needs to be resolved hurrily.
The processing of mud and disposal are exactly with suitable technical measures, mud is reused or turns back in the physical environment again with certain form of not decreasing environment.Excess sludge treatment process commonly used at present is that mud concentrates → anaerobic sludge digestion → mechanical dehydration; The sludge ultimate disposal mode mainly contains: soil utilization (agricultural as mud, gardening utilization etc.), sanitary landfill, sludge incineration and input ocean etc.The required structures of anaerobic sludge digestion pond body is huge, and initial cost is big, and anaerobic digestion process requires the homo(io)thermism in the digester, complicated operation; Also there is weak point in above-mentioned several mud, as the common the highest regulation of limiting the quantity of of agricultural sludge heavy-metal that surpasses of the content of heavy metal in the mud.In addition, also contain pathogenic agent, parasitic ovum, furans etc. in the mud, improper as agricultural use, will cause serious harm to human beings'health.Landfill is disposed and easily underground water is polluted, simultaneously a large amount of land occupations.Incineration disposal can make sludge volume reduce significantly, and can sterilize, but the investment of burning facility and working cost are all bigger, and the atmospheric polluting materials such as (dioxin) of the Dioxins in the products of combustion all works the mischief to human body.Can avoid shoreline and coastal waters to be polluted in a short time though throw in the ocean, its long-term hazards may be more serious, and mud trucking costs costliness, by most countries forbidding in the world.Therefore start with from the source, farthest reducing the excess sludge discharge amount has remarkable social benefit and economic benefit.
The sewage purification technology that can realize mud decrement is exactly to take suitable technical measures under the prerequisite that guarantees wastewater treatment efficiency, reduces the sludge quantity that is produced when handling same amount sewage as far as possible.Present sludge reduction technology can be divided into four classes: (1) uncoupling technology.Under the normal circumstances, biological katabolism and anabolism are linked together by the conversion between ATP (Triphosaden) and the ADP (adenosine diphosphate (ADP)), promptly decompose certain substrate, will have a certain proportion of organism synthetic.But in Sewage treatment systems, exist under the situation of uncoupling agents, ATP was synthetic in a large number or synthetic when substrate was oxidized is discharged by other approach rapidly later on, makes katabolism of bacterium and anabolism no longer are coupled at decomposition reaction by the synthetic of ATP generally.Like this bacterium keep normal decompose substrate in, self resultant velocity slows down, apparent speed reduces, thereby reaches the purpose that reduces sludge yield, Here it is so-called uncoupling.But have following problem in actual applications: the uncoupling agents of being thrown domestication owing to microorganism after the long period is degraded, thereby loses uncoupling; After adding uncoupling agents, need more oxygen deoxidation to fail to change into the organism of mud, thereby make oxygen-supplying amount increase; Add the expense costliness of uncoupling agents, its concentration that needs to keep in sewage is 4～80mg/l, and consumption is surprising; Uncoupling agents normally has bigger toxic compound than difficult for biological degradation or to biology, has the environmental safety problem.(2) increase organism autoxidation speed.Oxidation ditch process commonly used in the conventional activated sludge method.Thereby this technology can prolong sludge age or reduce sludge loading and reduce sludge yield, but the oxidation ditch occupation of land is bigger, and processing efficiency is low.Membrane bioreactor in the embrane method sewage treatment process can be at long sludge age or is operated under the situation of not blowdown mud fully, thereby causes extremely low sludge yield.But adopt this method can cause serious film to pollute, thereby increase the replacement charge of membrane module, in addition, the sewage sludge viscosity in the membrane bioreactor is big, and dewatering is poor, has increased the expense of sludge dewatering.(3) biological recessive growth technology.Also can reach the purpose of mud decrement by the recessive growth of strengthening cell.Recessive growth is meant that bacterium utilizes the formed secondary matrix growth of decline bacterium, and whole process has comprised molten born of the same parents and growth.Common lysis comprises various chemistry, physics, biology and the effect of associating mutually thereof.There is report to adopt ozone, the molten born of the same parents of soda acid in the chemical lysis method, but increased the investment and the energy consumption of sewage disposal; When adopting the molten born of the same parents of chlorine, the generation haloform that reacts of the organism in chlorine and the mud endangers environment.Thermal treatment in the molten born of the same parents' method of physics and mechanical crushing method need more additional energy input equally; Though ultrasonic wave can be destroyed cell walls, its effect is subjected to the many parameters (temperature, viscosity, surface tension etc.) of liquid and the influence of ultrasonic wave generating apparatus, also can not drop into practical at short notice.Among the biological molten born of the same parents add zymin or the antibiotic method is unrealistic on funds.(4) microorganism predation.Mainly be to utilize the predation of microfauna (as former/metazoan) to bacterium.From ecological angle, food chain is long more in system, and power loss is many more, and the energy that can be used for the synthesising biological body is just few more, and the final total biomass that forms is also just few more.Therefore, the predation of microfauna all can reach the purpose that reduces excess sludge production in food and extend chain or the fortified foodstuff chain.In the conventional activated sludge method, microfauna and bacterium coexist as the aeration tank, and the operational conditions of aeration tank mainly is to be beneficial to microorganisms such as the bacterium organism of eating, and not exclusively is suitable for having the growth of the high microfauna of predator bacteria effect, thereby causes the sludge reduction DeGrain.Compare with other three classes mud decrement technology, the microorganism predation method has remarkable advantages such as economy and environmental friendliness, and development prospect is good.
Summary of the invention
The object of the present invention is to provide a kind of be suitable for bacterium, protozoon, metazoan and the growth of large-scale microfauna, utilize the equipment of the microorganism predation effect minimizing excess sludge production in the food chain, provide cost-effective approach for reducing the sludge of sewage treatment plants processing costs.
Foregoing invention purpose of the present invention is achieved by following technical solution: microorganism predation sludge reduction device is a container, and its inside is separated into microfauna vitellarium, mud-water separation district, oxygen-starved area by dividing plate; The bottom of microfauna vitellarium is furnished with tube aerator, and inside is provided with flow deflector, is filled with filler between flow deflector and the dividing plate; By the open communication on the dividing plate, be communicated with by pipeline between mud-water separation district and the oxygen-starved area between microfauna vitellarium and the mud-water separation district.
Former/metazoan and large-scale microfauna can be divided in mixed solution, freely move about the free type of growth and on filler the attached type of apposition growth, be aerobic type microorganism.Protozoon mainly contains ciliate, flagellate, sarcodina etc.; Metazoan mainly contains wheel animalcule, nematode; Large-scale microfauna mainly contains tubificid in water bear, water flea and the Oligochaeta, erythema Piao body worm, fairy maiden worm etc.The microfauna that utilizes microorganism predation minimizing sludge yield device can be respectively dissimilar of the present invention provides stable growing environment, make their relatively independent separately dominant populations that becomes, reduced interspecific competition, thereby effectively improve wastewater purifying efficiency, and reduced sludge yield because of predation disperse bacterial.Therefore this technology can reduce the cost of sewage disposal and the sludge treatment disposal costs of sewage work.
The microorganism predation that utilizes of the present invention reduces sewage disposal and sludge reduction process that the sludge yield device can be applicable to municipal sewage plant and industrial sewage treatment plant, has following advantage:
1, technology is simple, compact construction, and stable and reliable operation, convenient operation and management can be completely achieved automatization control.
2, utilize microorganism predation to reduce that the sludge yield device can be respectively former/metazoan and large-scale microfauna provides stable growing environment, make their relatively independent separately dominant populations that becomes, reduce interspecific competition, can effectively improve wastewater purifying efficiency, and because of the predation to bacterium reduces sludge yield, thereby reduce the cost of sewage disposal and the sludge treatment disposal costs of sewage work.
3, utilize microorganism predation to reduce the function that the sludge yield device can make system not only have the removal organism and reduce sludge yield, but also can effectively remove the total nitrogen in the sewage, and help the removal of phosphorus.
4, the former/metazoan in the system not only can predator bacteria and also can directly eat mud granule and sewage in organic detritus, so a large amount of former/metazoans helps to improve wastewater purifying efficiency in the system.
5, owing to the predation of microfauna, the settling property and the dewatering of active sludge are good in the equipment, and do not have clustering phenomena.
Description of drawings
Fig. 1 is the structural representation of device of the present invention.
Embodiment
Embodiment one: as shown in Figure 1, the microorganism predation minimizing sludge yield makeup that utilizes of present embodiment is changed to a rectangular vessel, by dividing plate 14 its inside is separated into microfauna vitellarium (bacterium disperses vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4, large-scale microfauna vitellarium 5), mud-water separation district 6, oxygen-starved area 7; Bacterium disperses the dividing plate 14 bottom perforates between vitellarium 2 and the protozoon vitellarium 3, can only communicate by the perforate of dividing plate 14 between bacterium dispersion vitellarium 2 and the protozoon vitellarium 3; Dividing plate 14 top perforates between protozoon vitellarium 3 and the metazoan vitellarium 4, can only communicate by the perforate of dividing plate 14 between the water surface elevation when aperture upper limb height in this hole is lower than equipment and normally moves, protozoon vitellarium 3 and metazoan vitellarium 4; Dividing plate 14 bottom perforates between metazoan vitellarium 4 and the large-scale microfauna vitellarium 5, metazoan vitellarium 4 can only communicate by the perforate of dividing plate 14 with large-scale microfauna vitellarium 5; Dividing plate 14 top perforates between large-scale microfauna vitellarium 5 and the mud-water separation district 6, large-scale microfauna vitellarium 5 can only communicate by the perforate of dividing plate 14 with mud-water separation district 6; Then be connected between mud-water separation district 6 and the oxygen-starved area 7 by pipeline 10; Bacterium disperses the import of vitellarium 2 to be connected with sewage transport pump 1; Mud discharging mouth 15 is arranged at the bottom in mud-water separation district 6; The bottom of oxygen-starved area 7 is connected with mud transferpump 8.
The bacterium of present embodiment disperses vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4, large-scale microfauna vitellarium 5 to be aerobic zone, and described mixed solution is meant the biological sludge in the aerobic zone and the mixture of sewage.
Tube aerator 9 is arranged in a side in the bottom of the microfauna vitellarium described in the present embodiment (bacterium disperses vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4, large-scale microfauna vitellarium 5), bacterium disperses aerator 9 close pool wall one sides in the vitellarium 2, and the aerator in protozoon vitellarium 3, metazoan vitellarium 4 and the large-scale microfauna vitellarium 5 is near dividing plate 14.Aeration mode can adopt one-sided cyclic aeration.
The inside of the microfauna vitellarium described in the present embodiment (bacterium disperses vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4, large-scale microfauna vitellarium 5) is provided with flow deflector 13, leave the space between the bottom of flow deflector and the container bottom, the water surface elevation when it highly is lower than equipment and normally moves.Flow deflector is divided into Da Qu and sub-district with the zone at its place.
All lay filler 11 in protozoon vitellarium 3 described in the present embodiment, metazoan vitellarium 4, the large-scale microfauna vitellarium 5, the installation site of filler 11 is positioned at body middle part, pond on short transverse, then be positioned at the Da Qu that flow deflector 13 and dividing plate are surrounded on the horizontal direction.Described filler is to be used for providing suitable habitat for the stable growth of microfauna (comprising protozoon, metazoan and large-scale microfauna), improves the space availability ratio of equipment.In addition, denitrifying bacteria can also be in the filler growth inside, and the performance denitrification helps the removal of total nitrogen.The space structure of filler is the spirochete shape, and its packing ratio in protozoon vitellarium 3, metazoan vitellarium 4 and large-scale microfauna vitellarium 5 is respectively 20%～50%, 10%～30% and 20%～50%.
Mud-water separation district 6 described in the present embodiment is between aerobic zone and oxygen-starved area 7, and its top is provided with water leg 12, is used for collecting the supernatant liquor in mud-water separation district; Its bottom is provided with slip plate 16, makes mud be easy to sedimentation; Pipeline 10 can make the part mud after the sedimentation flow into oxygen-starved area 7.
No mud backflow and hydraulic detention time are short relatively in the bacterium dispersion vitellarium 2 described in the present embodiment, and sludge age is less than hydraulic detention time.This pond mainly is to utilize abundant organic foodstuff to stimulate to breed bacterial growth rapidly, and bacterium is dispersion rather than zoogloea state in this pond.Disperse the bacterium of growth not have zoogleic protection, easilier in follow-up structures preyed on by high Institute of Micro-biology.Bacterium disperses growth can also increase itself and the contact area of organic substrates and oxygen in water, quickens mass transfer process, the time of shortening sewage disposal, reduces the floor space of structures.Described bacterium is an aerobic bacteria.
Protozoon in the present embodiment in the protozoon vitellarium 3 has predation to bacterium and fungi, can reduce the excessive biological sludge (bacterium live body or dead thalline) that bacterium disperses the vitellarium to introduce, thereby reduces system sludge output.Concentration of substrate and oxygen supply condition only are suitable for protozoic growth in the protozoon vitellarium, and make it become the interior dominant population in this zone.
Metazoan vitellarium 4 mainly is to utilize metazoan that the predation of protozoon, bacterium is reduced excess sludge production in the present embodiment.Organic substrates concentration in this zone reduces greatly, is unsuitable for the growth of short protozoon, especially bacterium generation time, and metazoan becomes dominant population wherein.
The quantity showed increased of the medium-and-large-sized microfauna of present embodiment vitellarium 5 medium-and-large-sized microfaunas, they are stronger to the prey ability of biological sludge, and are also maximum to the contribution rate that reduces sludge yield.Carrying out solid-liquid separation because the mixed solution in this pond directly enters into mud-water separation district 6 in addition, also is the guarantee unit of system's effluent quality.
Remove the organic ability except that further performance disperse bacterial microfauna vitellarium in the present embodiment (2,3,4,5), a large amount of protozoons can reduce sludge yield to bacterium, metazoan to the predation of protozoon and bacterium, in addition, the microfauna organic granular of can directly eating, degradation of organic substances.Have mud to reflux in the microfauna vitellarium, sludge age is greater than hydraulic detention time.It is 2～2.5: 1.5～2 that bacterium disperses the volumetric ratio of vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4 and large-scale microfauna vitellarium 5: 1～1.5: 1.5～2.
Embodiment two: as shown in Figure 1, utilizing microorganism predation minimizing sludge yield to disguise and putting mainly of present embodiment is made up of bacterium dispersion vitellarium 2, protozoon vitellarium 3, metazoan vitellarium 4, large-scale microfauna vitellarium 5, mud-water separation district 6, oxygen-starved area 7, be used for reducing the excess sludge production of sewage treatment process, the organism in the sewage is removed.
Sewage is delivered to bacterium by sewage transport pump 1 and is disperseed vitellarium 2, utilizes the organism in the degradation by bacteria sewage wherein.The hydraulic detention time of sewage in this zone is 1～2 hour, and the dissolved oxygen in the mixed solution is not less than 0.5mg/l, and water temperature is 20～25 ℃, and the pH value is 6～9, and suspended sludge concentration is 5.0～6.0g/l in the pond.
After most of organism in the sewage was degraded, bacterium disperseed the mixed solution in the vitellarium 2 to enter protozoon vitellarium 3, utilized protozoon that the predation of disperse bacterial is reduced the sludge yield of system, and continued to utilize the live bacteria decomposing organic matter.The hydraulic detention time of sewage in this pond is 1～1.5 hour, and the dissolved oxygen in the mixed solution is not less than 0.5mg/l, and water temperature is 20～25 ℃, and the pH value is 6～9, and suspended sludge concentration is 4.0～5.0g/l in the pond, and degree is 2～2.5mm behind the microbial film.
Effluent stream enters metazoan vitellarium 4 behind protozoon vitellarium 3, according to according to the microorganism predation principle in the food chain, utilize metazoan predation protozoon and bacterium, to reduce sludge yield.The hydraulic detention time of sewage in this pond is 1 hour, and the dissolved oxygen in the mixed solution is not less than 1.0mg/l, and water temperature is 20～25 ℃, and the pH value is 6～9, and suspended sludge concentration is 4.0～5.0g/l in the pond, and degree is 1～1.5mm behind the microbial film.
Sewage enters large-scale microfauna vitellarium 5, because large-scale microfauna is the highest human consumer in the sewage biological treatment system, it is also just more obvious to the lower predation of microorganism (as bacterium, protozoon) that waits, so the sludge reduction effect in this section is also the most remarkable.The hydraulic detention time of sewage in this pond is 1～1.5 hour, and the dissolved oxygen in the mixed solution is not less than 2.0mg/l, and water temperature is 20～25 ℃, and the pH value is 6～9, and suspended sludge concentration is 3.0～4.0g/l in the pond, and degree is 0.5～1.0mm behind the microbial film.
Mixed solution is flowed through behind the large-scale microfauna vitellarium 5, enter mud-water separation district 6 and carry out mud-water separation, supernatant liquor in the mud-water separation district 6 is collected by water leg 12, water reuse in the conduct after after sterilization, can entering receiving water body or advanced treatment, and the mud that precipitates is except that a small amount of discharging, rest part then is back to oxygen-starved area 7 via pipeline 10, and reflux ratio is 50～100%.
Utilize the end redox potential condition of oxygen-starved area 7 to make the mud corruption, with further minimizing sludge quantity.Oxidation reduction potential control in the anoxic pond-200～-100mV.
The mud of oxygen-starved area 7 is sent into protozoon vitellarium 3 through sludge reflux pump 8.
Raw waste water organism (COD) concentration is 1200mg/l, when suspended substance (SS) concentration is 320mg/l, after adopting microorganism predation to reduce the processing of sludge yield device, COD in its water outlet and SS concentration are respectively 60mg/l and 30mg/l, satisfy integrated wastewater discharge standard GB8978-2002 primary standard; Sludge yield is 0.1～0.2kgSS/kgCOD
Remove, be significantly less than the sludge yield (0.7～1.0kgSS/kgCOD of conventional activated sludge method
Remove), the mud decrement effect is remarkable.
Claims (9)
1, utilize microorganism predation to reduce the device of excess sludge production, it is characterized in that described device is a container, its inside is separated into microfauna vitellarium, mud-water separation district (6), oxygen-starved area (7) by dividing plate (14); The bottom of microfauna vitellarium is furnished with tube aerator (9), and the inside of microfauna vitellarium is provided with flow deflector (13), is filled with filler (11) between flow deflector (13) and the dividing plate (14); By the open communication on the dividing plate (14), be communicated with by pipeline (10) between mud-water separation district (6) and oxygen-starved area (7) between microfauna vitellarium and mud-water separation district (6).
2, the device that utilizes microorganism predation to reduce excess sludge production according to claim 1, it is characterized in that described microfauna vitellarium is separated into bacterium successively by dividing plate (14) and disperses vitellarium (2), protozoon vitellarium (3), metazoan vitellarium (4), large-scale microfauna vitellarium (5), wherein bacterium disperses that the perforate by dividing plate (14) bottom communicates between vitellarium (2) and protozoon vitellarium (3), perforate by dividing plate (14) top between protozoon vitellarium (3) and metazoan vitellarium (4) communicates, and the perforate by dividing plate (14) bottom between metazoan vitellarium (4) and the large-scale microfauna vitellarium (5) communicates.
3, the device that utilizes microorganism predation to reduce excess sludge production according to claim 1 is characterized in that the bottom in described mud-water separation district (6) has mud discharging mouth (15).
4, the device that utilizes microorganism predation to reduce excess sludge production according to claim 1 is characterized in that leaving the space between the bottom of described flow deflector (13) and the container bottom, the water surface elevation the when height of flow deflector (13) is lower than equipment and normally moves.
5, the device that utilizes microorganism predation to reduce excess sludge production according to claim 2 is characterized in that being filled with filler (11) in described protozoon vitellarium (3), metazoan vitellarium (4) and the large-scale microfauna vitellarium (5).
6, the device that utilizes microorganism predation to reduce excess sludge production according to claim 5, the installation site that it is characterized in that described filler (11) is positioned at the middle part, vitellarium on short transverse, be positioned at the zone that flow deflector (13) and dividing plate (14) are surrounded on the horizontal direction.
7, the device that utilizes microorganism predation to reduce excess sludge production according to claim 5 is characterized in that the packing ratio of described protozoon vitellarium (3), metazoan vitellarium (4) and the interior filler in large-scale microfauna vitellarium (5) (11) is respectively 20%～50%, 10%～30% and 20%～50%.
8, the device that utilizes microorganism predation to reduce excess sludge production according to claim 1 is characterized in that the top in described mud-water separation district (6) is provided with water leg (12), and the bottom of mud-water separation district (6) is provided with slip plate (16).
9, the device that utilizes microorganism predation to reduce excess sludge production according to claim 2 is characterized in that it is 2～2.5: 1.5～2 that described bacterium disperses the volumetric ratio of vitellarium (2), protozoon vitellarium (3), metazoan vitellarium (4) and large-scale microfauna vitellarium (5): 1～1.5: 1.5～2.
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| CNB2006100102655A CN100393639C (en) | 2006-07-07 | 2006-07-07 | Device for reducing excess sludge output by using predator |
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| CNB2006100102655A CN100393639C (en) | 2006-07-07 | 2006-07-07 | Device for reducing excess sludge output by using predator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157501B (en) * | 2007-09-14 | 2010-06-09 | 哈尔滨工业大学 | Helminth attaching biological bed for deweighting city sewage sludge |
| CN101786779B (en) * | 2010-02-05 | 2011-08-24 | 哈尔滨工业大学 | Sludge reduction and denitrification combined urban sewage and sludge combined treatment system |
| CN102887587A (en) * | 2012-11-05 | 2013-01-23 | 哈尔滨北方环保工程有限公司 | Method for treating sewage by adopting multi-stage type bio-aeration pool |
| CN104341083A (en) * | 2014-09-29 | 2015-02-11 | 北京交通大学 | Pharmaceutical sludge reduction treatment method |
| CN106045203A (en) * | 2016-06-30 | 2016-10-26 | 北京中大立信环境技术有限责任公司 | LSP sludge reduction biological treatment system and water treatment method thereof |
| CN111646665A (en) * | 2020-07-10 | 2020-09-11 | 北京亦庄水务有限公司 | Sludge reduction treatment equipment and treatment method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2430437Y (en) * | 2000-06-22 | 2001-05-16 | 白城市新型环保设备制造厂 | Purifying bath for waste water |
| JP2002239569A (en) * | 2001-02-16 | 2002-08-27 | Inax Corp | Facilities for reclaimed water |
| CN1304304C (en) * | 2005-09-08 | 2007-03-14 | 山东大学 | Process for two-step type bioreactor for sludge decrement |
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2006
- 2006-07-07 CN CNB2006100102655A patent/CN100393639C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157501B (en) * | 2007-09-14 | 2010-06-09 | 哈尔滨工业大学 | Helminth attaching biological bed for deweighting city sewage sludge |
| CN101786779B (en) * | 2010-02-05 | 2011-08-24 | 哈尔滨工业大学 | Sludge reduction and denitrification combined urban sewage and sludge combined treatment system |
| CN102887587A (en) * | 2012-11-05 | 2013-01-23 | 哈尔滨北方环保工程有限公司 | Method for treating sewage by adopting multi-stage type bio-aeration pool |
| CN104341083A (en) * | 2014-09-29 | 2015-02-11 | 北京交通大学 | Pharmaceutical sludge reduction treatment method |
| CN106045203A (en) * | 2016-06-30 | 2016-10-26 | 北京中大立信环境技术有限责任公司 | LSP sludge reduction biological treatment system and water treatment method thereof |
| CN111646665A (en) * | 2020-07-10 | 2020-09-11 | 北京亦庄水务有限公司 | Sludge reduction treatment equipment and treatment method |
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| CN100393639C (en) | 2008-06-11 |
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