CN103121756A - Hydrolysis/aerobic cycle suspension activated sludge process and device for deep treatment of waste water - Google Patents
Hydrolysis/aerobic cycle suspension activated sludge process and device for deep treatment of waste water Download PDFInfo
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- CN103121756A CN103121756A CN2013100804658A CN201310080465A CN103121756A CN 103121756 A CN103121756 A CN 103121756A CN 2013100804658 A CN2013100804658 A CN 2013100804658A CN 201310080465 A CN201310080465 A CN 201310080465A CN 103121756 A CN103121756 A CN 103121756A
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Abstract
The invention discloses a hydrolysis/aerobic cycle suspension activated sludge process and device for deep treatment of waste water. The hydrolysis/aerobic cycle suspension activated sludge process adopts a suspension activated sludge process and comprises the following steps of: enabling waste water to enter a hydrolysis tank to be subjected to anaerobic hydrolysis, then enabling the waste water to enter an aerobic tank to be subjected to deep treatment, and finally enabling the waste water to enter a secondary sedimentation tank to be subjected to mud-water separation, so that the waste water can be discharged, wherein backflow ratio of mixed solution of the aerobic tank returning to the hydrolysis tank is 1.0-8.0, and the backflow ratio of sludge of the secondary sedimentation tank returned to the hydrolysis tank is 0.5-2.0. The hydrolysis/aerobic cycle suspension activated sludge device comprises the hydrolysis tank, the aerobic tank and the secondary sedimentation tank, wherein the outlet of the hydrolysis tank is connected with the inlet of the aerobic tank, the outlet of the aerobic tank is connected with the inlet of the secondary sedimentation tank, a first return pipe is arranged from the aerobic tank to the hydrolysis tank, and a second return pipe is arranged from the secondary sedimentation tank to the hydrolysis tank. The treatment method disclosed by the invention has the characteristics of simple flow, easiness for operation, high treatment efficiency and low running cost.
Description
Technical field
The present invention relates to water treatment field, relate in particular to Hydrolysis/Aerobic circulation suspension activated sludge process and the device of advanced treatment of waste water.
Background technology
In order to contain the further deterioration of water body environment quality, national sewage comprehensive emission standard successively promotes, and improves the exploitation focus that the wastewater treatment degree of depth has become water treatment field.
After routine biochemistry was processed, secondary effluent still contained many biodegradable organics (BCOD), for improving the processing degree of depth of waste water, need to further process secondary effluent.Coagulating sedimentation, absorption, filtration, advanced oxidation, membrane technique etc., usually as the technology that secondary effluent is further processed, the application of different quantities is in fact also arranged, but these methods, except coagulation-precipitation-filtration, construction cost or reduced price are expensive, from technology and economic feasibility angle analysis, if activated sludge process is effective, namely feasible by improving the biological degradation degree of depth to reach good effluent quality, biodegradable organic (BCOD) is almost even all removed, and advantage is undoubtedly huge.
Modern biological wastewater treatment technology not only has been confined to certain single technique, and anaerobism, anoxic or aerobic combination often all can be arranged, and wherein Hydrolysis/Aerobic technique is widely used in field of waste water treatment.Hydrolysis/Aerobic technique mainly is comprised of hydrolytic tank and Aerobic Pond, according to the completing order and can be divided into two classes of hydrolysis treatment and aerobic treatment, successively completes and completes simultaneously:
(1) successively complete reaction.This is maximum a kind of form of using at present, two pond bodies adopt suspension activated sludge process or biomembrance process, Continuous Flow method or intermittent flow method, it is mainly with hydrolytic tank and Aerobic Pond series connection, waste water flows through hydrolytic tank and Aerobic Pond successively, the follow-up aerobic easy degradable component that provides is provided, and then improves the processing efficiency of whole system.
(2) complete simultaneously reaction.Add on the basis of Hydrolysis/Aerobic series connection that namely supernatant liquor refluxes, make the reactor that separates on the space and have a different qualities microbiological deterioration colony have the function of simultaneously a certain pollutent being degraded, thereby play the effect of mutual reinforcement.Hydrolytic tank and Aerobic Pond can adopt biomembrance process or activated sludge process, also can adopt the biological fluidized bed form.
In existing wastewater processing technology, the general biodegradable organic of water outlet (BCOD) also has many, and water outlet will reach requirements at the higher level, generally also needs subsequent disposal (for example physico-chemical process or follow-up biochemical process), and cost improves like this, is unfavorable for widespread use.
Summary of the invention
Technical problem to be solved by this invention is that existing method of wastewater treatment investment is high, the defective of complicated operation in order to overcome, and a kind of Hydrolysis/Aerobic circulation suspension activated sludge process and device of advanced treatment of waste water is provided.It is simple that advanced waste treatment apparatus of the present invention and method have flow process, easy and simple to handle, and processing efficiency is high, invests the characteristics such as low, is fit to engineering and promotes for improving the wastewater treatment degree of depth.
The present invention solves the problems of the technologies described above by the following technical programs:
The invention provides a kind of Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water, comprise the steps: to adopt the suspension activated sludge process, waste water is introduced into hydrolytic tank and carries out anaerobic hydrolysis, enter afterwards the Aerobic Pond advanced treatment, enter at last second pond and carry out mud-water separation, get final product water outlet; Simultaneously, the water outlet mixed-liquor return of Aerobic Pond is 1.0-8.0 to the reflux ratio of hydrolytic tank, and the sludge reflux of second pond to the reflux ratio of hydrolytic tank is 0.5-2.0.
Wherein, described suspension activated sludge process can be the conventional suspension activated sludge process of using in this area, generally refers to contain the method for biologically treating wastewater of microbic activity sludge suspension in waste water.
Wherein, described waste water can be the processed conventionally trade effluent in this area, comprises petrochemical complex factory effluent and pharmaceutical industry waste water; Each index of described waste water is generally: the COD(chemical oxygen demand (COD)) value is preferably 500～5000mgL
-1, volatile phenol concentration is preferably 0～1500mgL
-1, the pH value is preferably 6～9.
Described wastewater treatment scale is not limit, and the treatment process scale of this area conventional processing waste water is all applicable basically, and preferably wastewater treatment capacity is 0～8000m
3D
-1, treatment capacity is not 0.
In the present invention, the whole system influent load of the Hydrolysis/Aerobic circulation suspension activated sludge process of this advanced treatment of waste water is preferably 0.3-1.5kgCODm
-3D
-1
Wherein, the volume ratio of described hydrolytic tank and Aerobic Pond is preferably (0.25:1)-(1.5:1).
Wherein, whipping appts is installed preferably in described hydrolytic tank, realizes that by whipping appts is installed the hydrolytic tank bottom is without the dead angle; Described whipping appts is preferably underwater propeller, and the power density of described underwater propeller is preferably 0.5-2.0w/m
3, be more preferably 0.6-1.0w/m
3The water intake mode of described hydrolytic tank is preferably selected bottom in and top out, and under angle of rake effect, current are the spiral type fluidised form under water, and the mud distribution gradient is conducive to keep the hydrolytic tank high sludge concentration.The sludge seeding amount of described hydrolytic tank is preferably 10-15gVSSL
-1Described anaerobic hydrolysis refers to that hydrolytic tank is in the hydrolysis under anoxic condition, does not refer to anaerobic hydrolysis, and this anaerobic hydrolysis process can be carried out at normal temperatures, and the unpleasant odor that water outlet has without anaerobic hydrolysis is as methane etc.
Wherein, described Aerobic Pond preferably adopts the pulling flow type Aerobic Pond, is provided with gallery in this pulling flow type Aerobic Pond.The ratio of the total length of described gallery and width is preferably (2:1)-(50:1), is more preferably (5:1)-(20:1).Aerating apparatus preferably is installed in described Aerobic Pond, and described aerating apparatus is preferably for cutting by force aerator, and the HS that more preferably produces for Shanghai heart edge Genie et Environnement cuts by force aerator.The described aeration air quantity of cutting by force aerator preferably is 10-50m
3/ min/1000m
3, be more preferably 15-30m
3/ min/1000m
3The decoration form of described aerating apparatus is preferably arranged for line style.The sludge seeding amount of described Aerobic Pond is preferably 10-15gVSSL
-1
Wherein, the surface load of described second pond is preferably 0.3-1.0m
3/ m
2/ h is more preferably 0.5-0.75m
3/ m
2/ h.
In the present invention, in stable operation stage, described hydrolytic tank can be kept high sludge concentration, is preferably 5.0-9.0gVSSL
-1The sludge concentration of described Aerobic Pond is preferably 4.0-8.0gVSSL
-1
The present invention also provides a kind of device of implementing the Hydrolysis/Aerobic circulation suspension activated sludge process of above-mentioned advanced treatment of waste water, it comprises a hydrolytic tank, an Aerobic Pond and a second pond, the outlet of this hydrolytic tank is connected with the entrance of this Aerobic Pond, the outlet of this Aerobic Pond is connected with the entrance of this second pond, establish one first return line from this Aerobic Pond to this hydrolytic tank, establish one second return line from this second pond to this hydrolytic tank.
On the basis that meets this area general knowledge, above-mentioned each optimum condition, but arbitrary combination namely get the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material be commercially available getting all.
Positive progressive effect of the present invention is:
(1) in device of the present invention, sludge loading is low, sludge concentration is high, mud is long age, biophase is abundant, can improve the wastewater treatment degree of depth, water outlet biodegradable organic (BCOD) after advanced waste treatment apparatus of the present invention is processed is almost completely removed, and water outlet can reach town sewage discharging one-level A standard GB18918-2002 and national sewage comprehensive discharge primary standard GB8978-1996.
The characteristics such as (2) to have flow process simple, easy and simple to handle for the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water of the present invention, and processing efficiency is high, and running cost is low are fit to engineering and promote and be used for improving the wastewater treatment degree of depth.
(3) in the present invention, the integrated circulation pattern of hydrolytic tank and Aerobic Pond, the end mixed solution of Aerobic Pond and the mud of second pond all are back to hydrolytic tank.Contain simultaneously hydrolysis bacterium and aerobic bacteria in one reaction pool, can effectively bring into play the advantage of hydrolysis treatment and aerobic treatment, synergy obviously.
Description of drawings
Fig. 1 is the advanced waste treatment apparatus structural representation of a preferred embodiment of the present invention.
Embodiment
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example according to ordinary method and condition, or is selected according to catalogue.
In following case study on implementation, COD(chemical oxygen demand (COD)), the detection method of sludge concentration is all carried out " water and effluent monitoring analytical procedure ", China Environmental Science Press, the 4th edition, 2002 by national standard; Be specially, the detection method of COD is potassium dichromate process, and the detection method of sludge concentration is weighting method.
Town sewage discharging one-level A standard GB18918-2002, COD is less than 50mgL for regulation
-1, the BOD(biochemical oxygen demand (BOD)) and less than 10mgL
-1The sewage comprehensive discharge primary standard GB8978-1996 of country, COD is less than 100mgL for regulation
-1
Embodiment 1
A kind of advanced waste treatment apparatus, as shown in Figure 1.This advanced waste treatment apparatus comprises hydrolytic tank 1, Aerobic Pond 2 and second pond 3, the outlet of this hydrolytic tank 1 is connected with the entrance of this Aerobic Pond 2, the outlet of this Aerobic Pond 2 is connected with the entrance of this second pond 3, establish the first return line 4 from this Aerobic Pond 2 to this hydrolytic tank 1, establish the second return line 5 from this second pond 3 to this hydrolytic tank 1.
Embodiment 2
The Shandong petrochemical wastewater is processed engineering: contain petroleum-type, volatile phenol and alcohols material in waste water, this project waste water water yield is 2000-2500m
3D
-1, waste water COD: 500-1500mgL
-1, volatile phenol 50-150mgL
-1, pH is 8-9.Adopt the advanced waste treatment apparatus of embodiment 1 to process this factory effluent.
In this advanced waste treatment apparatus: the useful volume of (1) hydrolytic tank is 2300m
3, in establish one of underwater propeller, be used for to stir, single-machine capacity is 2.2kw; (2) useful volume of Aerobic Pond is 3700m
3, HS is installed in Aerobic Pond cuts by force aerator, be line style and arrange, aeration intensity is 16m
3/ min/1000m
3(3) diameter of second pond is 16m, and surface load is 0.41-0.52m
3/ m
2/ h.
Owing to containing poisonous objectionable impurities volatile phenol in waste water, the volume ratio of hydrolytic tank and Aerobic Pond is 0.62:1, and return sludge ratio is 1.0, and return current ratio of the mixed liquid is 3.0.The concentration of water inlet volatile phenol is effectively reduced in hydrolytic tank, and biology is not produced restraining effect substantially.Can be hydrolyzed to volatile phenol in hydrolytic tank, also can be hydrolyzed to secondary matrix in phegma.The water intake mode of hydrolytic tank is bottom in and top out, and the employing underwater propeller is whipping appts, and the waste water fluidised form is spiral type, is conducive to keep the hydrolytic tank high sludge concentration.
System's flooding velocity mean value is 2200m
3D
-1, COD mean value is 1000mgL
-1, organic loading is 0.37kgCODm
-3D
-1The unloading phase of device, the sludge seeding amount of whole system (comprising hydrolytic tank and Aerobic Pond) is 10.8gVSSL
-1Stable operation stage, hydrolytic tank sludge concentration mean value is 6.2gVSSL
-1, Aerobic Pond sludge concentration mean value is 5.8gVSSL
-1Operation result more than a year shows, this system run all right guarantees that the second pond return sludge ratio is 1.0, and the effluent quality result under different Aerobic Pond return current ratio of the mixed liquid is as shown in table 1, when the Aerobic Pond return current ratio of the mixed liquid was 3.0, water inlet volatile phenol concentration was at 50-150mgL
-1Between the fluctuation, hydrolytic tank water outlet volatile phenol is down to 0.5-10mgL
-1, second pond water outlet COD is 20-40mgL
-1, volatile phenol does not detect, and pH is 6.5-7.5.The COD clearance reaches 97.0%, and the volatile phenol clearance reaches 99.9%, contains hardly biodegradable organic BCOD in water outlet.This water outlet reaches town sewage discharging one-level A standard GB18918-2002.
Effluent quality under the different Aerobic Pond return current ratio of the mixed liquid conditions of table 1 embodiment 2
Embodiment 3
The Guizhou pharmacy waste water is processed engineering
This enterprise is that a production comprises that it is main drugmaker that 10 kinds of tablet, capsule, pill, granule, syrups etc. are produced formulation, and waste water is mainly derived from the Chinese patent medicine production process, and the water yield is 2400m
3D
-1, COD concentration is 5000mgL
-1Adopt the advanced waste treatment apparatus of embodiment 1 to process this factory effluent.
In this advanced waste treatment apparatus: the useful volume of (1) hydrolytic tank is 4300m
3, in establish two of underwater propellers (stirring action), single-machine capacity is 1.8kw; (2) useful volume of Aerobic Pond is 9000m
3, HS is installed in Aerobic Pond cuts by force aerator, be line style and arrange, aeration intensity is 26.9m
3/ min/1000m
3(3) diameter of second pond is 15m, and surface load is 0.57m
3/ m
2/ h.Hydrolytic tank and Aerobic Pond all adopt the device of suspension activated sludge process.
Contain the slow degradation material that produces in the Chinese patent medicine production process in waste water, the volume ratio of hydrolytic tank and Aerobic Pond is 0.48:1, and slow degradation material is converted into biochemical material preferably through hydrolytic action in hydrolytic tank, be beneficial to follow-up aerobic treatment.The water intake mode of hydrolytic tank is bottom in and top out, and the employing underwater propeller is whipping appts, and current are the spiral type fluidised form, and the mud distribution gradient is effectively kept high sludge concentration in hydrolytic tank.
System's flooding velocity mean value is 2400m
3D
-1, COD mean value is 5000mgL
-1, organic loading is 0.9kgCODm
-3D
-1The unloading phase of device, the sludge seeding amount of whole system (comprising hydrolytic tank and Aerobic Pond) is 12.8gVSSL
-1Stable operation stage, hydrolytic tank sludge concentration mean value is 6.5gVSSL
-1, Aerobic Pond sludge concentration mean value is 6.1gVSSL
-1Guarantee that the second pond return sludge ratio is 1.0, the effluent quality result under different Aerobic Pond return current ratio of the mixed liquid is as shown in table 2, and when the Aerobic Pond return current ratio of the mixed liquid was 4.0, water outlet COD was 40-60mgL
-1, pH is 6.8-7.2, and biodegradable organic BCOD removes substantially fully, and the COD clearance reaches 99.0%.This water outlet reaches national sewage comprehensive discharge primary standard.
Effluent quality under the different Aerobic Pond return current ratio of the mixed liquid conditions of table 2 embodiment 3
| The Aerobic Pond return current ratio of the mixed liquid | Water outlet COD(mgL -1） | The COD clearance |
| 0 | 100～200 | 97.0% |
| 2.0 | 60～100 | 98.4% |
| 4.0 | 40～60 | 99.0% |
Embodiment 4
Jiangsu additives for plastics factory waste water treatment engineering
In waste water, suspended solid and oils are more, and organic components is complicated, contains the poisonous and harmful hard-degraded substances such as isopropyl benzene, hydrogen phosphide cumene, dicumyl peroxide, acetone, phenol.This project integrated design sewage quantity is 900m
3D
-1, the actual motion amount is 500-600m
3D
-1, COD and phenol content are respectively 3000-4000mgL
-1, 500-1200mgL
-1Adopt the advanced waste treatment apparatus of embodiment 1 to process this factory effluent.
In this advanced waste treatment apparatus: the useful volume of (1) hydrolytic tank is 900m
3, in establish one of underwater propeller (stirring action), single-machine capacity is 1.0kw; (2) useful volume of Aerobic Pond is 2400m
3, HS is installed in Aerobic Pond cuts by force aerator, be line style and arrange, aeration intensity is 15-20m
3/ min/1000m
3(3) diameter of second pond is 10m, and the design surface load is 0.5m
3/ m
2/ h, in actual moving process, surface load is 0.3m
3/ m
2/ h.Hydrolytic tank and Aerobic Pond all adopt the device of suspension activated sludge process, and the hydrolytic tank water intake mode is bottom in and top out.
This waste water belongs to difficult waste water, contains hard-degraded substance and the high concentration phenols such as isopropyl benzene, hydrogen phosphide cumene, dicumyl peroxide.The volume ratio of hydrolytic tank and Aerobic Pond is 0.38:1, and hydrolytic tank itself has powerful diluting effect to toxic organics in waste water; Sludge reflux and Aerobic Pond mixed-liquor return also can dilute toxic organics in waste water simultaneously, and these factors guarantee that pollution substance does not produce restraining effect substantially to microorganism, make biochemical system stable.In hydrolytic tank, microorganism is hydrolyzed to hard-degraded substance, improves its biodegradability, is beneficial to follow-up aerobic treatment.
System's flooding velocity mean value is 550m
3D
-1, COD mean value is 3500mgL
-1, organic loading mean value is 0.58kgCODm
-3D
-1The unloading phase of device, the sludge seeding amount of whole system (comprising hydrolytic tank and Aerobic Pond) is 14gVSSL
-1Stable operation stage, hydrolytic tank sludge concentration mean value is 6.8gVSSL
-1, Aerobic Pond sludge concentration mean value is 6.5gVSSL
-1Operation result more than 2 years shows, this system run all right guarantees that the second pond return sludge ratio is 1.0, and the effluent quality result under different Aerobic Pond return current ratio of the mixed liquid is as shown in table 3, when the Aerobic Pond return current ratio of the mixed liquid was 6.0, second pond water outlet COD was 40-70mgL
-1, clearance reaches 98.0%, and water outlet phenol is less than 0.1mgL
-1, clearance reaches 99.9%, and in water outlet, biodegradable organic BCOD is less than 1.0mgL
-1This water outlet reaches national sewage comprehensive discharge primary standard.
Effluent quality under the different Aerobic Pond return current ratio of the mixed liquid conditions of table 3 embodiment 4
Claims (10)
1. the Hydrolysis/Aerobic circulation suspension activated sludge process of an advanced treatment of waste water, it is characterized in that, it comprises the steps: to adopt the suspension activated sludge process, waste water is introduced into hydrolytic tank and carries out anaerobic hydrolysis, enter afterwards the Aerobic Pond advanced treatment, enter at last second pond and carry out mud-water separation, get final product water outlet; Simultaneously, the water outlet mixed-liquor return of Aerobic Pond is 1.0-8.0 to the reflux ratio of hydrolytic tank, and the sludge reflux of second pond to the reflux ratio of hydrolytic tank is 0.5-2.0.
2. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, is characterized in that, each index of described waste water is: the COD value is 500～5000mgL
-1, volatile phenol concentration is 0～1500mgL
-1, the pH value is 6～9; The whole system influent load of the Hydrolysis/Aerobic circulation suspension activated sludge process of described advanced treatment of waste water is 0.3-1.5kgCODm
-3D
-1
3. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, is characterized in that, the volume ratio of described hydrolytic tank and Aerobic Pond is (0.25:1)-(1.5:1).
4. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, is characterized in that, in described hydrolytic tank, whipping appts is installed, described whipping appts is underwater propeller; The water intake mode of described hydrolytic tank is bottom in and top out.
5. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 4, is characterized in that, the power density of described underwater propeller is 0.5-2.0w/m
3
6. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, is characterized in that, the sludge seeding amount of described hydrolytic tank is 10-15gVSSL
-1, the sludge seeding amount of described Aerobic Pond is 10-15gVSSL
-1
7. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, it is characterized in that, described Aerobic Pond adopts the pulling flow type Aerobic Pond, is provided with gallery in this pulling flow type Aerobic Pond, and the ratio of the total length of described gallery and width is (2:1)-(50:1); In described Aerobic Pond, aerating apparatus is installed, the decoration form of described aerating apparatus is that line style is arranged.
8. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 7, is characterized in that, the ratio of the total length of described gallery and width is (5:1)-(20:1); Described aerating apparatus is for cutting by force aerator, and the described aeration air quantity of cutting by force aerator is 10-50m
3/ min/1000m
3
9. the Hydrolysis/Aerobic circulation suspension activated sludge process of advanced treatment of waste water as claimed in claim 1, is characterized in that, the surface load of described second pond is 0.3-1.0m
3/ m
2/ h; In stable operation stage, the sludge concentration of described hydrolytic tank is 5.0-9.0gVSSL
-1, the sludge concentration of described Aerobic Pond is 4.0-8.0gVSSL
-1
10. the device of the Hydrolysis/Aerobic circulation suspension activated sludge process of the described advanced treatment of waste water of any one in an enforcement such as claim 1～9, it is characterized in that, it comprises a hydrolytic tank, an Aerobic Pond and a second pond, the outlet of this hydrolytic tank is connected with the entrance of this Aerobic Pond, the outlet of this Aerobic Pond is connected with the entrance of this second pond, establish one first return line from this Aerobic Pond to this hydrolytic tank, establish one second return line from this second pond to this hydrolytic tank.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108529749A (en) * | 2018-04-28 | 2018-09-14 | 青海爱迪旺环保科技有限公司 | A kind of bioremediation of uns-dimethylhydrazine industrial production wastewater |
| CN110590071A (en) * | 2019-09-30 | 2019-12-20 | 华东理工大学 | Wastewater zero-discharge treatment method based on medicament softening and ion exchange hardness removal |
| CN110590070A (en) * | 2019-09-30 | 2019-12-20 | 华东理工大学 | Biological treatment method for production wastewater of vanillin and derivatives thereof |
| CN110668639A (en) * | 2019-09-30 | 2020-01-10 | 华东理工大学 | Treatment method for zero discharge of wastewater in polyformaldehyde production |
| CN112047575A (en) * | 2020-09-10 | 2020-12-08 | 江苏润誉环保设备科技有限公司 | Method for treating pyromellitic dianhydride production wastewater and special device |
| CN113480027A (en) * | 2021-07-26 | 2021-10-08 | 济源中联水泥有限公司 | Toluene wastewater treatment device |
| CN113845275A (en) * | 2021-10-29 | 2021-12-28 | 上海心缘环境工程有限公司 | Method for deeply removing COD (chemical oxygen demand) in wastewater |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108529749A (en) * | 2018-04-28 | 2018-09-14 | 青海爱迪旺环保科技有限公司 | A kind of bioremediation of uns-dimethylhydrazine industrial production wastewater |
| CN110590071A (en) * | 2019-09-30 | 2019-12-20 | 华东理工大学 | Wastewater zero-discharge treatment method based on medicament softening and ion exchange hardness removal |
| CN110590070A (en) * | 2019-09-30 | 2019-12-20 | 华东理工大学 | Biological treatment method for production wastewater of vanillin and derivatives thereof |
| CN110668639A (en) * | 2019-09-30 | 2020-01-10 | 华东理工大学 | Treatment method for zero discharge of wastewater in polyformaldehyde production |
| CN110590071B (en) * | 2019-09-30 | 2023-04-07 | 华东理工大学 | Wastewater zero-discharge treatment method based on medicament softening and ion exchange hardness removal |
| CN112047575A (en) * | 2020-09-10 | 2020-12-08 | 江苏润誉环保设备科技有限公司 | Method for treating pyromellitic dianhydride production wastewater and special device |
| CN112047575B (en) * | 2020-09-10 | 2022-06-24 | 江苏润誉环保设备科技有限公司 | Method for treating pyromellitic dianhydride production wastewater and special device |
| CN113480027A (en) * | 2021-07-26 | 2021-10-08 | 济源中联水泥有限公司 | Toluene wastewater treatment device |
| CN113845275A (en) * | 2021-10-29 | 2021-12-28 | 上海心缘环境工程有限公司 | Method for deeply removing COD (chemical oxygen demand) in wastewater |
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