CN101544451A - Method for treating town sewage - Google Patents
Method for treating town sewage Download PDFInfo
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- CN101544451A CN101544451A CN200910098177A CN200910098177A CN101544451A CN 101544451 A CN101544451 A CN 101544451A CN 200910098177 A CN200910098177 A CN 200910098177A CN 200910098177 A CN200910098177 A CN 200910098177A CN 101544451 A CN101544451 A CN 101544451A
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Abstract
The invention discloses a method for treating town sewage. The method comprises that: after large granular impurities in the town sewage are removed by a crude separation device, the town sewage enters a denitrifying section of a suspended biological filter reactor and then is subjected to denitrification and removal of partial organic pollutants by using denitrifying bacteria and facultative aerobe attached to biological carriers; and the denitrifying section yields water to an aerobic carbonization section, most organic pollutants are removed by aerobic heterotrophic bacteria, then the aerobic carbonization section yields water to an aerobic nitration section, ammonia nitrogen in the sewage is removed by the nitrobacteria attached to the biological carriers, the aerobic nitration section yields water to a sludge accommodating filter, the phosphorus-containing sediment generated by coagulating sedimentation is intercepted by the sludge accommodating filter, and finally the town sewage can be discharged after reaching standards and also can be recycled. The method can efficiently remove the organic pollutants, ammonia nitrogen and total nitrogen, and is easily realized by complete equipment. The adopted suspended biological filter needs no filter plate, shortens construction period and reduces investment. The method is suitable for sewage treatment of medium-small towns.
Description
Technical field
The present invention relates to sewage treatment area, relate in particular to the method that a kind of town sewage is handled.
Background technology
Along with improving constantly of the rapid economy development and the level of urbanization, and relevant social government utility---relatively lagging behind of environment protection particularly, China's river organic contamination ubiquity, and pollute and become increasingly conspicuous, the section in the cities and towns of flowing through is polluted quite serious.Surpassed the industrial wastewater pollution load first from town sewage load in 1999, and the fast development of China small and medium-sized cities will continue considerable time, estimate that urban population will reach 5.6 hundred million people in 2010, China's water pollutes the emphasis controlling party to the pollution control that is town sewage.The town sewage treatment facility fraction of coverage of China is lower; In residential quarter newly developed, dispersive crowd settlement such as travelling scenery point, holiday village, sanatorium, airport, railway station, economic development sub-district, the ratio that the sewage of discharging obtains handling is lower.
The method that town sewage is handled mainly is that desanding+just heavy+biochemical process+two are heavy.
The present settling pit and the principle of settling tank all are to utilize sand grains and other proportion that forms material to rely on gravitational settling in the sand hopper and bucket of settling pit or settling tank greater than water, with sand water sepn or mud and water separating equipment the material in sand hopper or the bucket is carried out solid-liquid separation again, thereby play the purpose of desanding, scrubbing.These technologies are all based on sedimentation theory, and the hydraulics in settling pit or the settling tank is bigger to the influence of desanding, scrubbing.Generally speaking; because entering the discharge of sewage of the sewage work of sewage work fluctuates bigger; cause settling pit or settling tank amount of inlet water also often to change; thereby the hydraulics of settling pit or preliminary sedimentation tank is changed, influence gravity settling the less sand grains of particle or the removal of fine suspension matter.
Biochemical process is based on activated sludge process, and particularly oxidation ditch process is used extensive especially in the whole nation.Its maximum characteristics are to manage comparatively simply, and anti impulsion load is stronger.It is lower that but it handles load, and particularly since " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) implemented, discharging claimed to ammonia nitrogen in the standard, and particularly one-level A mark requires the water outlet ammonia nitrogen to be no more than 5mg/L.Because the heterotrophic bacterium growth velocity of degradable organic pollutant is fast, the nitrifier breeding that the severe inhibition growth velocity is slow, and degradation of ammonia nitrogen can only rely on nitrifier to finish, therefore, activated sludge process can only prolong hydraulic detention time, realizes removing simultaneously the purpose of organic pollutant and ammonia nitrogen.Wherein the ratio of nitrifier in active sludge is lower, and it is low to handle ammonia nitrogen efficient, causes sewage work for making ammonia nitrogen up to standard, needs bigger pond to hold.This just needs more investment, and is very unfavorable for the middle Development of Small Cities and Towns that fund and land used are comparatively nervous.
The bio membrane treatment development in recent years is very fast, and improving constantly of automatic control technology, materials processing technology particularly is for the application of bio membrane treatment provides condition.The BAF technology has shown the speciality of self aspect denitrogenation after external introduction.Because nitrifier more adapts to the immobilization growth, the ammonia nitrogen loading that microbial film is handled town sewage improves greatly, has also just shortened the hydraulic detention time of biochemical treatment to a great extent, and microbial film also can improve the removal load of organic pollutant simultaneously.Biomembrance process is compared with activated sludge process, and hydraulic detention time shortens, and floor space is dwindled.In addition, the mud production rate of biomembrance process is very low, can alleviate sludge of sewage treatment plants and handle burden.
Because domestic haydite materials source is wide, cost is low, becomes the first-selected filler of BAF.Through operation for many years, there is following problem: 1, haydite fragmentation, cause the system handles decrease in efficiency; 2, aeration tube breaks, and the haydite of whole device need be shifted out, and changes, and workload is very big; 3, backwashing strength is big, frequency is high, and haydite is as high-gravity filler, and the recoil tolerance that needs is very big, and recoil pressure is wayward, causes active biological film to come off, the effluent quality variation; 4, the haydite pollutant holding capability is limited, under the prerequisite of water inlet concentration of suspension less than 100mg/L, needs recoil in 3-6 days once.Adopting light porous filler is to replace haydite materials, a kind of method that overcomes the above problems.
Second pond mainly adopts radical sedimentation basin.Be characterized in that effluent quality is good, shortcoming is relatively poor to waterpower variation adaptability.Filtering technique promptly can resist the water impact load in conjunction with the BAF main process, also can reduce floor space.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the method that provides a kind of town sewage to handle.
Town sewage is behind roughing out device removal macrobead suspended substance wherein, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 0.7～1.7 hour, the pH value is 6.2～7.2, dissolved oxygen is 0.1～0.3mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 0.4～1.8 hour, and the pH value is 7.5～8.4, and dissolved oxygen is 2～4mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1.0～1.7 hours, and the pH value is 7.5～8.4, and dissolved oxygen is 3～4mg/L; The water outlet of aerobic nitrification section enters receives dirty strainer, adds the dephosphorization medicament in the pipeline of dirty strainer entering to receive simultaneously, and by the pipeline short mix, the phosphorous throw out of generation enters to be received dirty strainer and be trapped last town sewage qualified discharge or reuse; Suspending biological filter reactor and the mud of receiving in the dirty strainer enter mud storage pond, further dehydration again through recoil.
Described suspending biological filter reactor has multilayered structure, all arranges independently oxygenating system for every layer.Oxygenating system adopts compressor, roots blower or centrifugal blower.Bio-carrier is to be filled with holey particulate carrier ball, and the proportion of carrier ball is 0.95～0.97, and carrier ball filling ratio in reactor is 50%～80%.The interior elastic web porous particle of filling of the dirty strainer of receiving.The dephosphorization medicament is a polymerize aluminum chloride, and dosage is 12～20mg/L.The aerobic nitrification section outlet conduit of suspending biological filter reactor is provided with the reflux line system, and water outlet is carried out denitrification by the denitrification section that reflux pump is back to the suspending biological filter reactor.The dirty strainer filtering velocity of receiving is 12～15m/h.
The beneficial effect that the present invention compared with prior art has:
1) the present invention adopts suspending biological filter can efficiently remove organic pollutant, ammonia nitrogen and total nitrogen, is easy to realize complete set equipment;
2) the present invention's employing is the problem of the suspending biological filter solution haydite BAF aeration tube maintenance difficult of core with holey particulate carrier ball, need not filter plate, shortens construction period, reduces investment;
3) receiving dirty strainer filtering velocity more than 10m/h among the present invention, is more than 3 times of rapid filter, saves a large amount of floor spaces.
Description of drawings
The method process flow diagram that Fig. 1 handles for town sewage;
Fig. 2 is a suspending biological filter synoptic diagram of the present invention.
Embodiment
In conjunction with the accompanying drawings the roughing out device among the present invention, suspending biological filter reactor and the dirty strainer of receiving are elaborated.
The roughing out device
The effect of roughing out device is to remove bigger particulate form impurity.It is to integrate the pretreatment unit that changes sieve, sand separator.One side utilization is changeed the thick suspended substance of screen filtration of sieve, utilizes commentaries on classics sieve rotary centrifugal force that the sand in the waste water is separated on the other hand.Replace settling pit and preliminary sedimentation tank by the roughing out device, reduce the load of biochemical treatment.
The suspending biological filter reactor
The effect of suspending biological filter reactor is the principal pollutant of biochemical treatment town sewage, and it is a kind of new bio filter tank technique, has adopted a kind of elastic web porous particle.Its component is: polyester polyol 86 weight parts, polymer polyatomic alcohol 10 weight parts, isocyanic ester 82 weight parts, water 3 weight parts, catalyzer 0.3 weight part, whipping agent 5 weight parts, suds-stabilizing agent 2 weight parts.Catalyzer is stannous octoate and dimethyl benzylamine, and whipping agent is water and fluoro trichloromethane, and suds-stabilizing agent is a silicone oil 580.Microorganism can be fixed on the carrier.Load quantity of microorganism is more than 20g/L, and support density is at 0.9-1.0g/cm behind the water holding
3Suspending biological filter carrier filling ratio can be adjusted as required, and owing to carrier can freely roll, and excess sludge is less, is difficult for stopping up.Be mainly used in the biochemical treatment of town sewage.Denitrification section, aerobic carbonization section, aerobic nitrification section adopt suspending biological filter can hold back a large amount of microorganisms, improve and handle load, shorten hydraulic detention time, are easy to the equipmentization that realizes.Suspending biological filter is determined one or more layers structure according to land used and influent quality situation, arranges that all independently oxygenating system is for the ease of controlling the air capacity of each processing unit for every layer.When denitrifying carbon source is not enough, add methyl alcohol to denitrification zone.
Receive dirty strainer
It is to remove to hold back phosphorous throw out and other lightweight suspension thing that the dirty strainer of receiving mainly acts on, and guarantees effluent quality.The dirty strainer of receiving utilizes the snappiness protruded packing as filtrate, utilizes the Depth Filtration principle, holds back the impurity in the sewage.Snappiness protruded packing voidage height, pollutant holding capability is big, can reduce the back flushing frequency.The filtering rate height, hydraulic detention time is short, is easy to equipmentization.The dirty strainer of receiving can replace second pond.
Embodiment 1:
COD is 107mg/L, and BOD is 32mg/L, and SS is 80mg/L, NH
3-N is 25mg/L, TN is 31mg/L, TP is that the town sewage of 3.4mg/L is after the roughing out device is removed wherein macrobead suspended substance, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 0.7 hour, and the pH value is 6.2, dissolved oxygen is 0.1mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 0.4 hour, and the pH value is 7.5, and dissolved oxygen is 2mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1 hour, and the pH value is 7.5, and dissolved oxygen is 3mg/L; Adopt the centrifugal blower air feed, the proportion of the carrier ball of suspending biological filter is 0.95, and carrier ball filling ratio in reactor is 50%; The water outlet of aerobic nitrification section enters receives dirty strainer, simultaneously receive polyaddition aluminum chloride in the pipeline of dirty strainer entering, dosage is 18mg/L, by the pipeline short mix, the phosphorous throw out that generates enters to be received dirty strainer and is trapped, receive dirty strainer filtering velocity 15m/h, last town sewage reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A mark.
Embodiment 2:
COD is 230mg/L, and BOD is 73mg/L, and SS is 111mg/L, NH
3-N is 27mg/L, TN is 33mg/L, TP is that the town sewage of 2.7mg/L is after the roughing out device is removed wherein macrobead suspended substance, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 1.0 hours, and the pH value is 7.2, dissolved oxygen is 0.3mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 0.9 hour, and the pH value is 8.4, and dissolved oxygen is 4mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1.1 hours, and the pH value is 8.4, and dissolved oxygen is 4mg/L; Adopt the centrifugal blower air feed, the proportion of the carrier ball of suspending biological filter is 0.97, and carrier ball filling ratio in reactor is 60%; The water outlet of aerobic nitrification section enters receives dirty strainer, simultaneously receive polyaddition aluminum chloride in the pipeline of dirty strainer entering, dosage is 12mg/L, by the pipeline short mix, the phosphorous throw out that generates enters to be received dirty strainer and is trapped, receive dirty strainer filtering velocity 15m/h, last town sewage reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A mark.
Embodiment 3:
COD is 370mg/L, and BOD is 126mg/L, and SS is 157mg/L, NH
3-N is 37mg/L, TN is 43mg/L, TP is that the town sewage of 4.1mg/L is after the roughing out device is removed wherein macrobead suspended substance, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 1.5 hours, and the pH value is 6.2, dissolved oxygen is 0.1mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 1.5 hours, and the pH value is 7.8, and dissolved oxygen is 2mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1.5 hours, and the pH value is 7.5, and dissolved oxygen is 3mg/L; Adopt the centrifugal blower air feed, the proportion of the carrier ball of suspending biological filter is 0.97, and carrier ball filling ratio in reactor is 60%; The water outlet of aerobic nitrification section enters receives dirty strainer, simultaneously receive polyaddition aluminum chloride in the pipeline of dirty strainer entering, dosage is 20mg/L, by the pipeline short mix, the phosphorous throw out that generates enters to be received dirty strainer and is trapped, receive dirty strainer filtering velocity 12m/h, last town sewage reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A mark.
Embodiment 4:
COD is 450mg/L, and BOD is 145mg/L, and SS is 204mg/L, NH
3-N is 41mg/L, TN is 52mg/L, TP is that the town sewage of 3.2mg/L is after the roughing out device is removed wherein macrobead suspended substance, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 1.7 hours, and the pH value is 6.5, dissolved oxygen is 0.1mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 1.8 hours, and the pH value is 7.9, and dissolved oxygen is 2mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1.6 hours, and the pH value is 7.5, and dissolved oxygen is 3mg/L; Adopt the centrifugal blower air feed, the proportion of the carrier ball of suspending biological filter is 0.97, and carrier ball filling ratio in reactor is 80%; The water outlet of aerobic nitrification section enters receives dirty strainer, simultaneously receive polyaddition aluminum chloride in the pipeline of dirty strainer entering, dosage is 17mg/L, by the pipeline short mix, the phosphorous throw out that generates enters to be received dirty strainer and is trapped, receive dirty strainer filtering velocity 12m/h, last town sewage reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A mark.
Claims (8)
1, a kind of method of town sewage processing, it is characterized in that: town sewage is behind roughing out device removal macrobead suspended substance wherein, enter the denitrification section of suspending biological filter reactor, the hydraulic detention time of denitrification section is 0.7～1.7 hour, the pH value is 6.2～7.2, dissolved oxygen is 0.1～0.3mg/L, in the suspending biological filter reactor bio-carrier is housed, denitrifying bacteria and double oxygen bacterium invest on the bio-carrier, carry out the conversion of nitrate, nitrite and the removal of part organic pollutant; The water outlet of denitrification section utilizes aerobic heterotrophic bacterium to remove majority of organic pollutants to aerobic carbonization section, and the hydraulic detention time of aerobic carbonization section is 0.4～1.8 hour, and the pH value is 7.5～8.4, and dissolved oxygen is 2～4mg/L; The water outlet of aerobic carbonization section utilizes attached to the ammonia nitrogen in the removal of the nitrifier on the bio-carrier sewage to the aerobic nitrification section, and the hydraulic detention time of aerobic nitrification section is 1.0～1.7 hours, and the pH value is 7.5～8.4, and dissolved oxygen is 3～4mg/L; The water outlet of aerobic nitrification section enters receives dirty strainer, adds the dephosphorization medicament in the pipeline of dirty strainer entering to receive simultaneously, and by the pipeline short mix, the phosphorous throw out of generation enters to be received dirty strainer and be trapped last town sewage qualified discharge or reuse; Suspending biological filter reactor and the mud of receiving in the dirty strainer enter mud storage pond, further dehydration again through recoil.
2, the method for a kind of town sewage processing according to claim 1, it is characterized in that: described suspending biological filter reactor has multilayered structure, all arranges independently oxygenating system for every layer.
3, the method for a kind of town sewage processing according to claim 2, it is characterized in that: described oxygenating system adopts compressor, roots blower or centrifugal blower.
4, the method for a kind of town sewage processing according to claim 1, it is characterized in that: described bio-carrier is to be filled with holey particulate carrier ball, the proportion of carrier ball is 0.95～0.97, and carrier ball filling ratio in reactor is 50%～80%.
5, the method for a kind of town sewage processing according to claim 1 is characterized in that: the described interior elastic web porous particle of filling of dirty strainer of receiving.
6, the method for a kind of town sewage processing according to claim 1, it is characterized in that: described dephosphorization medicament is a polymerize aluminum chloride, dosage is 12～20mg/L.
7, the method for a kind of town sewage processing according to claim 1, it is characterized in that: the aerobic nitrification section outlet conduit of described suspending biological filter reactor is provided with the reflux line system, and water outlet is carried out denitrification by the denitrification section that reflux pump is back to the suspending biological filter reactor.
8, the method handled of a kind of town sewage according to claim 1 is characterized in that: described to receive dirty strainer filtering velocity be 12～15m/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098177A CN101544451A (en) | 2009-05-05 | 2009-05-05 | Method for treating town sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910098177A CN101544451A (en) | 2009-05-05 | 2009-05-05 | Method for treating town sewage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060378A (en) * | 2010-11-29 | 2011-05-18 | 哈尔滨工业大学 | Method for carrying out denitrifying phosphorus removal by controlling sectional addition of nitrite in real time |
| CN102985375A (en) * | 2010-05-20 | 2013-03-20 | 威立雅水务技术支持公司 | Controlled aeration of integrated fixed-film activated sludge bioreactor systems for the treatment of wastewater |
| CN103011512A (en) * | 2012-12-14 | 2013-04-03 | 浙江省环境保护科学设计研究院 | Returned sludge treatment device with in-situ sludge reduction function and reinforced denitrifying and phosphorus-removing enhancement effect and returned sludge treatment technology |
| CN105565582A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Method for treatment on sewage produced through preparation of hydrogen from coal |
| CN111233270A (en) * | 2020-02-13 | 2020-06-05 | 广州博芳环保科技股份有限公司 | Integrated sewage treatment method |
| CN111732267A (en) * | 2020-06-10 | 2020-10-02 | 杭州银江环保科技有限公司 | High-effect sewage treatment system of KtLM |
-
2009
- 2009-05-05 CN CN200910098177A patent/CN101544451A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102985375A (en) * | 2010-05-20 | 2013-03-20 | 威立雅水务技术支持公司 | Controlled aeration of integrated fixed-film activated sludge bioreactor systems for the treatment of wastewater |
| CN102985375B (en) * | 2010-05-20 | 2015-01-07 | 威立雅水务技术支持公司 | Controlled aeration of integrated fixed-film activated sludge bioreactor systems for the treatment of wastewater |
| CN102060378A (en) * | 2010-11-29 | 2011-05-18 | 哈尔滨工业大学 | Method for carrying out denitrifying phosphorus removal by controlling sectional addition of nitrite in real time |
| CN102060378B (en) * | 2010-11-29 | 2012-01-11 | 哈尔滨工业大学 | Method for carrying out denitrifying phosphorus removal by controlling sectional addition of nitrite in real time |
| CN103011512A (en) * | 2012-12-14 | 2013-04-03 | 浙江省环境保护科学设计研究院 | Returned sludge treatment device with in-situ sludge reduction function and reinforced denitrifying and phosphorus-removing enhancement effect and returned sludge treatment technology |
| CN103011512B (en) * | 2012-12-14 | 2014-06-25 | 浙江省环境保护科学设计研究院 | Returned sludge treatment device with in-situ sludge reduction function and reinforced denitrifying and phosphorus-removing enhancement effect and returned sludge treatment technology |
| CN105565582A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Method for treatment on sewage produced through preparation of hydrogen from coal |
| CN105565582B (en) * | 2014-10-09 | 2018-07-03 | 中国石油化工股份有限公司 | Coal hydrogen manufacturing sewage water treatment method |
| CN111233270A (en) * | 2020-02-13 | 2020-06-05 | 广州博芳环保科技股份有限公司 | Integrated sewage treatment method |
| CN111233270B (en) * | 2020-02-13 | 2020-11-13 | 广州博芳环保科技股份有限公司 | Integrated sewage treatment method |
| CN111732267A (en) * | 2020-06-10 | 2020-10-02 | 杭州银江环保科技有限公司 | High-effect sewage treatment system of KtLM |
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Open date: 20090930 |