CN211570398U - NMP waste water biological treatment device - Google Patents
NMP waste water biological treatment device Download PDFInfo
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- CN211570398U CN211570398U CN201922400876.6U CN201922400876U CN211570398U CN 211570398 U CN211570398 U CN 211570398U CN 201922400876 U CN201922400876 U CN 201922400876U CN 211570398 U CN211570398 U CN 211570398U
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Abstract
The utility model provides a NMP waste water biological treatment device belongs to sewage treatment technical field, the device is including the anaerobism pond, anaerobism sedimentation tank, one-level oxygen deficiency pond, the good oxygen pond of one-level, one-level sedimentation tank, second grade oxygen deficiency pond, the good oxygen pond of second grade, second grade sedimentation tank, reaction tank and the materialization sedimentation tank that communicate in proper order through the pipeline. The device can synchronously remove nitrogen and phosphorus, remove COD and reduce chroma, effectively solves the problems that the nitrogen and the phosphorus in the NMP wastewater are difficult to treat and the like, and the effluent can reach the discharge standard; and the whole process has small sludge production, effectively reduces the investment and the operating cost of sludge treatment, and has the advantages of low operating cost, simple operation and management and the like.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, especially, relate to a NMP waste water biological treatment device.
Background
A small amount of waste water is discharged in the production process of the lithium battery, particularly in the positive and negative electrode pulping process in the production process of the lithium battery, raw materials such as methyl pyrrolidone NMP, graphite powder, carbon powder and the like are used in the pulping process; therefore, after the pulping is finished, the cleaning wastewater discharged from the cleaning pulping tank can contain pollutants such as NMP (N-methyl pyrrolidone), SS (carbon powder, graphite powder) and the like, substances such as SS (graphite powder, carbon powder) and the like in the wastewater can be effectively removed by utilizing a traditional coagulating sedimentation chemical method, but organic substances (CODcr) are difficult to reach the standard, in addition, in the production process of the lithium battery, the water quantity of the wastewater is usually very small, the occupied area is large by utilizing a traditional anaerobic and aerobic biochemical treatment method, the investment cost is high, the biodegradability of the methylpyrrolidone NMP is very poor, and the biodegradation is difficult to realize, so that a combined treatment system is necessary to be developed, the substances such as SS and the like in the wastewater can be removed, and the methylpyrrolidone NMP in the water can also be removed.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a biological NMP wastewater treatment device with low operation cost and simple and convenient operation; processing apparatus can carry out denitrogenation, dephosphorization in step, reduce the COD value, and the treatment effect is good, utilizes after the device handles NMP waste water, the play water can reach emission standard.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a biological NMP wastewater treatment device, which comprises an anaerobic tank, an anaerobic sedimentation tank, a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank, a secondary sedimentation tank, a reaction tank and a physicochemical sedimentation tank which are sequentially communicated through pipelines;
a sludge-water mixed liquid reflux device is arranged between the anaerobic sedimentation tank and the anaerobic tank, a nitrified liquid reflux device is arranged between the primary aerobic tank and the primary anoxic tank, and a nitrified liquid reflux device is arranged between the secondary aerobic tank and the secondary anoxic tank; a sludge reflux device is arranged between the first-stage sedimentation tank and the first-stage anoxic tank, a sludge reflux device is arranged between the second-stage sedimentation tank and the second-stage anoxic tank, and the first-stage sedimentation tank and the second-stage sedimentation tank are communicated with a sludge concentration tank.
Preferably, the sludge discharge port of the materialized sedimentation tank is communicated with the sludge inlet of the sludge concentration tank.
Preferably, the device also comprises a regulating tank, and an anaerobic lift pump is arranged between the regulating tank and the anaerobic tank.
Preferably, the bottom of the anaerobic sedimentation tank, the bottom of the primary sedimentation tank and the bottom of the secondary sedimentation tank are respectively provided with a sludge outlet and a sludge reflux pump, so that the precipitated sludge can respectively reflux into the anaerobic tank, the primary anoxic tank and the secondary anoxic tank through pipelines.
Preferably, the sludge discharge port of the materialized sedimentation tank is communicated with the sludge inlet of the sludge concentration tank.
Preferably, the NMP biological wastewater treatment device further comprises a clean water tank, and a water inlet of the clean water tank is communicated with a water outlet of the materialization sedimentation tank.
The NMP wastewater biological treatment device provided by the utility model is designed according to the treatment method provided by the utility model, and comprises an anaerobic tank, an anaerobic sedimentation tank, a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank, a secondary sedimentation tank, a reaction tank and a physicochemical sedimentation tank which are sequentially communicated through pipelines; the utility model provides an in the device respectively handle the pond and set up rationally, can realize carrying out biological treatment step by step to NMP waste water, effectively solved in the NMP waste water nitrogen, phosphorus difficult processing scheduling problem, and have advantages such as running cost is low, operation management is simple.
Drawings
FIG. 1 is the utility model discloses well NMP waste water biological treatment device's structural schematic diagram, including equalizing basin (distribution tank), anaerobism pond, anaerobic precipitation tank, one-level oxygen deficiency pond, one-level good oxygen pond, one-level sedimentation tank, second grade oxygen deficiency pond, second grade good oxygen pond, second grade sedimentation tank, reaction tank, materialization sedimentation tank and sludge impoundment.
Detailed Description
The utility model provides a biological NMP wastewater treatment device, which comprises an anaerobic tank, an anaerobic sedimentation tank, a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank, a secondary sedimentation tank, a reaction tank and a physicochemical sedimentation tank which are sequentially communicated through pipelines;
in the utility model, a sludge-water mixed liquid reflux device is arranged between the anaerobic sedimentation tank and the anaerobic tank, a nitrifying liquid reflux device is arranged between the primary aerobic tank and the primary anoxic tank, and a nitrifying liquid reflux device is arranged between the secondary aerobic tank and the secondary anoxic tank; a sludge reflux device is arranged between the first-stage sedimentation tank and the first-stage anoxic tank, a sludge reflux device is arranged between the second-stage sedimentation tank and the second-stage anoxic tank, and the first-stage sedimentation tank and the second-stage sedimentation tank are communicated with a sludge concentration tank. The utility model discloses in the mud discharging port of materialization sedimentation tank preferred with the mud inlet intercommunication of sludge thickening tank.
In the utility model, the device also comprises an adjusting tank, an anaerobic lift pump is arranged between the adjusting tank and the anaerobic tank and is used for pumping the effluent of the adjusting tank into the anaerobic tank; the anaerobic lift pump is preferably a stainless steel transfer pump.
The utility model discloses in, be provided with mud reflux unit between the oxygen deficiency pond among anaerobism sedimentation tank and anaerobism pond, one-level oxygen deficiency-aerobic treatment, second grade oxygen deficiency-aerobic treatment to realize that the sedimentary sludge who produces flows back in the anaerobism sedimentation tank and the surplus mud in anaerobism pond, one-level sedimentation tank flows back in the one-level oxygen deficiency pond, the surplus mud in the second grade sedimentation tank flows back in the second grade oxygen deficiency pond. As an embodiment of the utility model, can the bottom of 3 sedimentation tanks sets up out the mud mouth and sets up the mud backwash pump, makes the sedimentation sludge flow back respectively in anaerobism pond, one-level oxygen deficiency pond and second grade oxygen deficiency pond through the pipeline.
In the utility model, the primary sedimentation tank and the secondary sedimentation tank are communicated with a sludge concentration tank, and particularly, the sludge outlets of the primary sedimentation tank and the secondary sedimentation tank are communicated with the sludge inlet of the sludge concentration tank; the sludge concentration tank is used for carrying out filter-pressing concentration treatment on the sludge so as to realize the reduction of the sludge and facilitate outward transportation and disposal.
In the utility model, the NMP wastewater biological treatment device comprises a reaction tank and a physical and chemical sedimentation tank, specifically, a water inlet of the reaction tank is communicated with a water outlet of the secondary sedimentation tank, and a water outlet of the reaction tank is communicated with a water inlet of the physical and chemical sedimentation tank; the reaction tank and the physical and chemical sedimentation tank are used for carrying out flocculation-sedimentation treatment on the effluent of the secondary sedimentation tank.
As an embodiment of the utility model, the sludge discharge opening of the materialized sedimentation tank is communicated with the sludge inlet of the sludge concentration tank so as to realize the filter-pressing concentration treatment of the materialized sedimentation sludge generated in the materialized sedimentation tank.
As an embodiment of the utility model, NMP waste water biological treatment device still includes the clean water basin, the water inlet of clean water basin with the delivery port intercommunication of materialization sedimentation tank for hold materialization sedimentation tank exhaust up to standard and go out water, and further will up to standard goes out water and discharges.
The utility model discloses right the shape and the size etc. of each processing pond do not have special injecions among the NMP waste water biological treatment device, according to handling the water yield, guarantee corresponding processing procedure go on smoothly can.
FIG. 1 is a schematic structural diagram of the biological NMP wastewater treatment device of the present invention. The following description will be made with reference to fig. 1 for a method of treating NMP wastewater by using the biological NMP wastewater treatment apparatus provided by the present invention:
firstly, collecting wastewater to be treated, then automatically flowing into an adjusting tank for aeration pretreatment, and lifting the effluent of the adjusting tank into an anaerobic tank for anaerobic treatment through an anaerobic lifting pump; the effluent of the anaerobic tank flows into an anaerobic sedimentation tank, and the sludge-water mixed liquor generated by the anaerobic sedimentation tank is controlled to flow back to the anaerobic tank according to the reflux ratio of 150-300%;
the effluent (first effluent) of the anaerobic sedimentation tank automatically flows into a secondary anoxic-secondary aerobic comprehensive treatment tank (comprising an anoxic tank 1, an aerobic tank 1, a primary sedimentation tank, an anoxic tank 2, an aerobic tank 2 and a secondary sedimentation tank which are communicated).
The effluent (second effluent) of an anoxic tank 1 in the comprehensive treatment tank automatically flows into an aerobic tank 2, an alkali reagent is added at a water inlet of the aerobic tank 1, the pH value of a system is controlled to be 7.5-8.5, and meanwhile, nitrified liquid generated by the aerobic tank flows back into the anoxic tank 1 according to a reflux ratio of 350-400%;
automatically flowing the effluent (third effluent) of the first-stage aerobic tank to a first-stage sedimentation tank for sedimentation treatment, wherein the obtained precipitated sludge flows back to the first-stage anoxic tank according to the reflux ratio of 150-300%; discharging the residual precipitated sludge into a sludge concentration tank for filter pressing concentration treatment;
and (4) automatically flowing the effluent (fourth effluent) of the primary sedimentation tank to a secondary anoxic tank for anoxic treatment.
Effluent (fifth effluent) of the secondary anoxic tank automatically flows into the secondary aerobic tank, and nitrified liquid generated by the aerobic tank flows back into the secondary anoxic tank according to the reflux ratio of 350-400%;
automatically flowing the effluent (sixth effluent) of the secondary aerobic tank to a secondary sedimentation tank for sedimentation treatment, wherein the obtained precipitated sludge flows back to the secondary anoxic tank according to the reflux ratio of 150-300%; discharging the residual precipitated sludge into a sludge concentration tank for filter pressing concentration treatment;
the effluent of the secondary sedimentation tank automatically flows into a reaction tank, and a flocculating agent and a coagulant are added at the water inlet of the reaction tank for flocculation treatment;
enabling the effluent of the reaction tank to flow into a physicochemical precipitation tank for physicochemical precipitation treatment to obtain physicochemical precipitated sludge and effluent reaching the standard; discharging the materialized precipitated sludge into a sludge concentration tank for filter pressing concentration treatment; and the effluent reaching the standard overflows to a clean water tank and is discharged through a discharge port of the clean water tank.
The technical solutions provided by the present invention are described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of the present invention.
Example 1
NMP wastewater of a certain lithium battery production plant is used as the NMP wastewater to be treated for treatment, the Chemical Oxygen Demand (COD) of the NMP wastewater of the plant is 8000mg/L, and the ammonia nitrogen concentration (NH)3-N) is 100mg/L, total nitrogen concentration (TN) is 700mg/L, and suspended matters in the wastewater are mostly graphite powder, carbon powder impurities and the like.
S1: the collected wastewater automatically flows into an adjusting tank to adjust the water quality and the water quantity, an aeration stirring device is arranged in the adjusting tank, and the aeration intensity is controlled to be 3m3/(m2H), carrying out aeration pretreatment;
s2: lifting the effluent of the regulating tank into an anaerobic tank through an anaerobic lifting pump (specifically a stainless steel delivery pump) for anaerobic treatment; wherein the anaerobic treatment temperature is controlled at 36 ℃, the pH value is controlled at 7.8, the hydraulic retention time is 0.5 day, and the sludge settlement ratio (SV30) is 85 percent;
s3: automatically flowing the effluent of the anaerobic tank into an anaerobic sedimentation tank, controlling the reflux ratio of sludge-water mixed liquor in the sedimentation tank to be 150-300%, and refluxing the sludge-water mixed liquor to the anaerobic treatment process;
s4: the method comprises the following steps that the effluent (first effluent) of an anaerobic sedimentation tank automatically flows into an anoxic 1 process in a second-stage anoxic-aerobic system (comprising an anoxic tank 1, an aerobic tank 1, a first-stage sedimentation tank, an anoxic tank 2, an aerobic tank 2 and a second-stage sedimentation tank which are communicated), glucose is added at a water inlet of the anoxic tank 1, and the carbon-nitrogen ratio of the system in the anoxic tank 1 is 5: 1, carrying out anoxic treatment; wherein the dissolved oxygen of the anoxic treatment is less than or equal to 0.2mg/L, the hydraulic retention time is 0.5 day, and the sludge sedimentation ratio (SV30) is 85 percent;
s5: enabling the effluent (second effluent) of the anoxic tank 1 to automatically flow into the aerobic tank 1, adding an alkali reagent (NaOH solution with the mass concentration of 20%) at a water inlet of the aerobic tank 1, controlling the pH value of the system to be 7.5-8.5, and carrying out aerobic treatment; the dissolved oxygen in the aerobic treatment stage is 4mg/L, and the aeration amount is 5.5m3/(m2H), sludge settling ratio (SV30) of 75%; meanwhile, the nitrifying liquid generated by the aerobic tank 1 flows back to the anoxic tank 1 according to the reflux ratio of 380 percent;
s6: automatically flowing the effluent (third effluent) of the aerobic tank 1 to a first-stage sedimentation tank for sedimentation treatment, wherein the obtained precipitated sludge flows back to the anoxic tank 1 according to the reflux ratio of 200%; discharging the residual precipitated sludge into a sludge concentration tank, performing filter-pressing concentration treatment on the residual precipitated sludge by adopting a plate-and-frame filter press until the water content of the obtained concentrated sludge is about 70%, and then transporting the concentrated sludge out for disposal as common solid waste;
s7: the effluent (fourth effluent) of the first-stage sedimentation tank automatically flows to an anoxic tank 2 for anoxic treatment; effluent (fifth effluent) of the anoxic tank 2 automatically flows into the aerobic tank 2, and nitrified liquid generated by the aerobic tank flows back into the anoxic tank according to the reflux ratio of 350-400%;
s8: the effluent (sixth effluent) of the aerobic tank 2 automatically flows to a secondary sedimentation tank for sedimentation treatment, wherein the obtained precipitated sludge flows back to the anoxic tank 2 according to the reflux ratio of 200%; discharging the residual precipitated sludge into a sludge concentration tank for filter pressing concentration treatment;
s9: automatically flowing the effluent (seventh effluent) of the secondary sedimentation tank to a reaction tank, and adding a PAC flocculating agent (Al) at the water inlet of the reaction tank2O3The content is 24 percent) and a PAM coagulant (the molecular weight is 1200 ten thousand) are subjected to flocculation treatment; wherein the dosage of the PAC flocculant is 0.7kg and the dosage of the PAM coagulant is 0.007kg based on the third effluent per cubic meter;
s10: enabling the effluent of the reaction tank to flow into a materialized precipitation tank for materialized precipitation treatment to obtain materialized precipitation sludge and final effluent; discharging the materialized precipitated sludge into a sludge concentration tank, performing filter pressing on the materialized precipitated sludge by adopting a plate-and-frame filter press until the water content of the obtained concentrated sludge is about 70%, and then transporting the obtained concentrated sludge out for disposal as common solid waste; the final effluent overflows to a clean water pool and is discharged through a discharge port of the clean water pool;
in the embodiment, the COD of the NMP wastewater treated by the secondary anoxic-aerobic comprehensive treatment tank is less than 600 mg/L; the ammonia nitrogen concentration is less than 25 mg/L; the total nitrogen concentration is less than 55 mg/L;
after flocculation treatment, Suspended Substances (SS) in NMP wastewater are removed, chromaticity is reduced, COD (chemical oxygen demand) in final effluent obtained after physical and chemical precipitation treatment is less than 500mg/L, ammonia nitrogen concentration is less than 25mg/L, and total nitrogen concentration is less than 40mg/L, so that the final effluent reaches discharge standards (COD is less than or equal to 500mg/L, ammonia nitrogen is less than or equal to 25mg/L, and total nitrogen is less than or equal to 40mg/L) in the urban sewer water quality standard (CJ343-2010), and can be directly discharged.
Comparative example 1
The sludge settlement ratio of the anaerobic treatment was 55%, the sludge settlement ratio of the primary anoxic-aerobic treatment was 55%, the sludge settlement ratio of the secondary anoxic-aerobic treatment was 55%, and the other steps were the same as in example 1. The ammonia nitrogen in the effluent after the physicochemical precipitation treatment can still be reduced to below 25mg/L, but the total nitrogen is about 31-60 mg/L, and the total nitrogen does not reach the standard.
Comparative example 2
The sludge settlement ratio of the anaerobic treatment is 35%, the sludge settlement ratio of the primary anoxic-aerobic treatment is 35%, the sludge settlement ratio of the secondary anoxic-aerobic treatment is 35%, and other steps are the same as those in example 1. The ammonia nitrogen in the effluent after the physicochemical precipitation treatment is about 21-30 mg/L, the total nitrogen is about 61-90 mg/L, and the ammonia nitrogen and the total nitrogen do not reach the standard at the moment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An NMP wastewater biological treatment device is characterized by comprising an anaerobic tank, an anaerobic sedimentation tank, a primary anoxic tank, a primary aerobic tank, a primary sedimentation tank, a secondary anoxic tank, a secondary aerobic tank, a secondary sedimentation tank, a reaction tank and a physicochemical sedimentation tank which are sequentially communicated through pipelines;
a sludge-water mixed liquid reflux device is arranged between the anaerobic sedimentation tank and the anaerobic tank, a nitrified liquid reflux device is arranged between the primary aerobic tank and the primary anoxic tank, and a nitrified liquid reflux device is arranged between the secondary aerobic tank and the secondary anoxic tank; a sludge reflux device is arranged between the first-stage sedimentation tank and the first-stage anoxic tank, a sludge reflux device is arranged between the second-stage sedimentation tank and the second-stage anoxic tank, and the first-stage sedimentation tank and the second-stage sedimentation tank are communicated with a sludge concentration tank.
2. The treatment device according to claim 1, wherein the sludge discharge port of the materialized sedimentation tank is communicated with the sludge inlet of the sludge concentration tank.
3. The treatment plant according to claim 1, further comprising a conditioning tank, wherein an anaerobic lift pump is disposed between the conditioning tank and the anaerobic tank.
4. The treatment device according to claim 1, wherein a sludge outlet and a sludge return pump are respectively arranged at the bottom of the anaerobic sedimentation tank, the primary sedimentation tank and the secondary sedimentation tank, so that the precipitated sludge can respectively return to the anaerobic tank, the primary anoxic tank and the secondary anoxic tank through pipelines.
5. The treatment device according to claim 1, wherein the sludge discharge port of the materialized sedimentation tank is communicated with the sludge inlet of the sludge concentration tank.
6. The apparatus of claim 1, wherein said biological NMP wastewater treatment apparatus further comprises a clean water reservoir, wherein a water inlet of said clean water reservoir is in communication with a water outlet of said physiochemical sedimentation tank.
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| CN201922400876.6U CN211570398U (en) | 2019-12-27 | 2019-12-27 | NMP waste water biological treatment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902979A (en) * | 2019-12-27 | 2020-03-24 | 苏州苏沃特环境科技有限公司 | NMP wastewater biological treatment method and device |
| CN114315047A (en) * | 2022-01-10 | 2022-04-12 | 苏沃特环境(江苏)有限公司 | Sausage casing wastewater standard treatment system and treatment method |
| CN115304207A (en) * | 2021-05-06 | 2022-11-08 | 河北邯钢冷轧薄板有限公司 | Biochemical pond constant temperature system of sewage treatment system |
-
2019
- 2019-12-27 CN CN201922400876.6U patent/CN211570398U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902979A (en) * | 2019-12-27 | 2020-03-24 | 苏州苏沃特环境科技有限公司 | NMP wastewater biological treatment method and device |
| CN110902979B (en) * | 2019-12-27 | 2023-10-31 | 苏州苏沃特环境科技股份有限公司 | NMP wastewater biological treatment method and device |
| CN115304207A (en) * | 2021-05-06 | 2022-11-08 | 河北邯钢冷轧薄板有限公司 | Biochemical pond constant temperature system of sewage treatment system |
| CN114315047A (en) * | 2022-01-10 | 2022-04-12 | 苏沃特环境(江苏)有限公司 | Sausage casing wastewater standard treatment system and treatment method |
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Address after: Room 323, building 28, No. 369, Lushan Road, high tech Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Suwote Environmental Technology Co.,Ltd. Address before: Room 323, building 28, No. 369, Lushan Road, high tech Zone, Suzhou City, Jiangsu Province Patentee before: SUZHOU SUWATER ENVIRONMENTAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
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