CN110436710A - A kind of nylon 6 produces waste water high-efficiency processing unit and treatment process - Google Patents
A kind of nylon 6 produces waste water high-efficiency processing unit and treatment process Download PDFInfo
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- CN110436710A CN110436710A CN201910747590.7A CN201910747590A CN110436710A CN 110436710 A CN110436710 A CN 110436710A CN 201910747590 A CN201910747590 A CN 201910747590A CN 110436710 A CN110436710 A CN 110436710A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The present invention relates to waste water treatment process technology, especially a kind of 6 production wastewater treatment process of nylon specifically comprises the following steps: that Waste Water Centralized is entered conditioning tank by (1)；(2) waste water is evacuated in anaerobic granular sludge bed reactor；(3) enter anoxic pond；(4) biochemical degradation；(5) it precipitates；(6) water outlet of ozone high grade oxidation system is directly discharged in environment.A kind of production of nylon 6 waste water high-efficiency processing unit, including wastewater equalization pond, anaerobic granular sludge bed, anoxic pond, CBR carrier flow bed, ASR activated sludge tank, sedimentation basin, ozone reaction tower, discharge pond.A kind of obtained nylon 6 of the present invention produces waste water high-efficiency processing unit and treatment process, the characteristics of by anaerobic granular sludge bed technology high load capacity, reduces treatment facility volume；Anaerobic bacteria degrades most of pollutant, alleviates the burden of subsequent aerobic process, reduces the excess sludge production of aerobic system generation.
Description
Technical field
The present invention relates to waste water treatment process technology, especially a kind of nylon 6 produces waste water high-efficiency processing unit and processing
Technique.
Background technique
Polycondensation reaction generation is occurred under certain condition by caprolactam monomer for nylon 6, can be generated in production a large amount of useless
Water, such as polymeric wastewater, wastewater of rectification.Since it is reversible reaction, more caprolactam monomer can be contained in waste water
And its oligomer, pollutant concentration is high, and processing difficulty is big.At present to the processing with the waste water mainly use anoxic (Anoxic)+
Aerobic (Aerobic), i.e. (A/O) technique.In order to keep removal efficiency, meets effluent index, generally require by being given birth to a large amount of
Sewage mixing living is handled with just can enter system after clear water dilution, causes treatment facility huge, load is low, energy consumption
Height, and aerobic process, in the increase with pollutant removal amount, biochemical sludge volume also will increase, and increase operating cost.The work
Skill effluent quality is generally unable to satisfy in line requirement, need to receive and is further processed after pipe by municipal composite wastewater factory.
Summary of the invention
The purpose of the present invention is to solve the deficiencies of the above technologies and provide, and a kind of nylon 6 produces waste water high-efficiency processing dress
It sets and treatment process, can be degraded to production waste water, oxidation processes, be finally reached the requirement of direct emission environment.
In order to achieve the above object, a kind of nylon 6 designed by the present invention produces waste water high-efficiency processing unit, including waste water
Conditioning tank, anaerobic granular sludge bed, anoxic pond, CBR carrier flow bed, ASR activated sludge tank, sedimentation basin, ozone reaction tower, row
Put pond；Wastewater equalization pond is equipped with delivery pipe, and delivery pipe is connected to anaerobic granular sludge bed, and wherein anaerobic granular sludge bed is upper
End setting three phase separator, is provided with overflow launder on anaerobic granular sludge bed, and overflow launder is by piping connection to compound aerobic
Device, compound aerobic device are successively divided into anoxic pond, CBR carrier flow bed, ASR activated sludge tank and sedimentation basin by baffle,
It is connected between adjacent pond body by the multilayer pore that baffle upper end is arranged, overflow launder is connected to anoxic pond, stirs in anoxic pond equipped with machinery
Mechanism is mixed, anoxic pond, CBR carrier flow bed and ASR activated sludge tank are both provided with activated sludge, set in CBR carrier flow bed
It is equipped with biofilm carrier, the bottom of CBR carrier flow bed and ASR activated sludge tank is provided with aerating system, ASR activated sludge tank
Mud return line is equipped with precipitating bottom of pond portion and is connected to anoxic pond, and precipitating bottom of pond portion by piping connection has sludge condensation
Pond, sedimentation basin upper end outlet are connected to ozone reaction tower, and ozone reaction tower is equipped with overflow pipe, and overflow pipe is connected to discharge pond,
It discharges pond and passes through piping connection to waste water pipe network.Above-mentioned mechanical stirring mechanism includes motor, agitating shaft and stirring blade；Except excessive
Delivery pump is provided on pipeline other than chute, overflow pipe, it is ensured that waste water normally conveys.
The outlet of sedimentation basin upper end is connected to the lower end of ozone reaction tower by pipeline, and the overflow pipe setting is anti-in ozone
Answer the upper end of tower.
Sludge concentration tank is connect by pipeline with plate type pressure filter, and sludge is pressed into mud cake, board-like pressure by plate type pressure filter
The filtrate that filter extrudes is connected to wastewater equalization pond by pipeline.
A kind of 6 production wastewater treatment process of nylon, specifically comprises the following steps:
(1) untreated nylon 6 production Waste Water Centralized is entered into conditioning tank, water circulating pump is provided in conditioning tank and is used for
Even water quality；
(2) waste water of conditioning tank is evacuated in anaerobic granular sludge bed reactor, is added in anaerobic granular sludge bed reactor
Microelement and sodium carbonate, and utilize the pollutant in anaerobic bacteria degrading waste water；
(3) the water outlet gravity flow in anaerobic granular sludge bed reactor enters anoxic pond, and blender is arranged in anoxic pond and is used for
Waste water and anoxic microorganism are sufficiently mixed, while adding carbon source and guaranteeing denitrification effect；
(4) the water outlet gravity flow of anoxic pond enters aerobic carrier flow bed, and waste water continues biochemical drop in aerobic carrier flow bed
Solution, and part mixed liquor is back in anoxic pond and carries out denitrification denitrogenation；
(5) water outlet of aerobic carrier flow bed enters secondary settling tank and is precipitated, and the precipitating sludge of secondary settling tank is largely back to scarce
The quantity of aerobic microbiological is kept in oxygen pond, fraction precipitating sludge is discharged into sludge concentration tank；
(6) water outlet of secondary settling tank enters ozone high grade oxidation system, is difficult to degrade by the strong oxidizing property removal biochemistry of ozone
Pollutant, and for decomposing the suspended particulate fine crushing for failing to precipitate in time in secondary settling tank；The water outlet of ozone high grade oxidation system is straight
It connects and is emitted into environment；
(7) sludge in sludge concentration tank carries out thickening by plate and frame filter press, and filtrate is back to conditioning tank, mud cake outward transport
Processing.
As optimization, the dosage of microelement is in 1-3ml/L in step (2)；The dosage of sodium carbonate is 250-
300ml/L；Within the scope of above-mentioned microelement dosage, the activity of anaerobic bacteria is strong, and treatment effeciency is high；And above-mentioned sodium carbonate adds
It measures in range, the anti-shock loading of anaerobic system is high, stable.Wherein contain Fe in microelement2+、Mg2+、Zn2+、Ni2+、
Co2+。
In step (3), it is introduced directly into anoxic pond using conditioning tank effluent part as carbon source, since anoxic pond decarburization needs
Machine carbon source, therefore it can be introduced directly into anoxic pond using the high organic carbon waste water in conditioning tank part as carbon source, C/N ratio 5-6 in pond is kept,
When aforesaid operations cause carbon source deficiency, carbon source can be individually added；And aforesaid operations had not only improved treatment effeciency, but also can drop
The dosage of low-carbon-source.
In step (4), the 30-50% of aerobic carrier additional amount preferably carrier of oxygen thermopnore dischargeable capacity passes through this preferred side
Case, can increase the contact area of aerobic microbiological and pollutant, also can be avoided carrier to the exposure in aerobic carrier flow bed
Gas system causes to bear.
In step (6), ozone dosage 20-30mg/L, effluent quality can meet level-one emission standard A.
A kind of obtained nylon 6 of the present invention produces waste water high-efficiency processing unit and treatment process, has below beneficial to effect
Fruit:
The characteristics of by anaerobic granular sludge bed technology high load capacity, treatment facility volume is reduced, takes up an area face compared to traditional handicraft
Product saves 30-40%, greatly reduces company investment cost；
Since anaerobic bacteria degrades most of pollutant, the burden of subsequent aerobic process is alleviated, reduces aerobic system generation
Excess sludge production, power consumption can save 35%, save operation investment.
By the way that aerobic carrier flow bed and ozone high grade oxidation technology is used continuously, effluent quality is improved, money has been saved
Source, and protect environment.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention；
Fig. 2 is a schematic structural view of Embodiment 4 of the present invention.
Specific embodiment
The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.
Embodiment 1:
As shown in Figure 1, a kind of 6 production wastewater treatment process of nylon of the present embodiment description, specifically comprises the following steps:
(1) untreated nylon 6 production Waste Water Centralized is entered into conditioning tank, water circulating pump is provided in conditioning tank and is used for
Even water quality；
(2) waste water of conditioning tank is evacuated in anaerobic granular sludge bed reactor, is added in anaerobic granular sludge bed reactor
Microelement and sodium carbonate, and utilize the pollutant in anaerobic bacteria degrading waste water；The dosage of microelement is in 1ml/L；Carbonic acid
The dosage of sodium is 300ml/L；Within the scope of above-mentioned microelement dosage, the activity of anaerobic bacteria is strong, and treatment effeciency is high；On and
It states within the scope of sodium carbonate dosage, the anti-shock loading of anaerobic system is high, stable.
(3) the water outlet gravity flow in anaerobic granular sludge bed reactor enters anoxic pond, and blender is arranged in anoxic pond
For waste water and anoxic microorganism to be sufficiently mixed, while adding carbon source and guaranteeing denitrification effect；Wherein by conditioning tank effluent part
It is introduced directly into anoxic pond as carbon source, keeps C/N ratio 5-6 in pond that can individually add when aforesaid operations cause carbon source deficiency
Carbon source；And aforesaid operations had not only improved treatment effeciency, but also can reduce the dosage of carbon source.
(4) the water outlet gravity flow of anoxic pond enters aerobic carrier flow bed, and waste water continues to give birth in aerobic carrier flow bed
Change degradation, and part mixed liquor is back in anoxic pond and carries out denitrification denitrogenation；Wherein aerobic carrier additional amount is aerobic load
The 30-50% of body thermopnore dischargeable capacity can increase the contact area of aerobic microbiological and pollutant by this preferred embodiment,
It can be avoided carrier the aerating system in aerobic carrier flow bed is caused to bear.
(5) water outlet of aerobic carrier flow bed enters secondary settling tank and is precipitated, and the precipitating sludge of secondary settling tank largely flows back
The quantity of aerobic microbiological is kept into anoxic pond, fraction precipitating sludge is discharged into sludge concentration tank；
(6) water outlet of secondary settling tank enters ozone high grade oxidation system, is difficult to degrade by the strong oxidizing property removal biochemistry of ozone
Pollutant, and for decomposing the suspended particulate fine crushing for failing to precipitate in time in secondary settling tank；The water outlet of ozone high grade oxidation system is straight
It connects and is emitted into environment；Ozone dosage is 20mg/L, stablizes water outlet COD in 20-30mg/L, is discharged TN < 5mg/L, water outlet
Suspended particulate can meet level-one emission standard A less than 10 < mg/L, effluent quality.
(7) sludge in sludge concentration tank carries out thickening by plate and frame filter press, and filtrate is back to conditioning tank, mud cake
Outward transport processing.
Embodiment 2:
As shown in Figure 1, a kind of 6 production wastewater treatment process of nylon of the present embodiment description, specifically comprise the following steps:
(1) untreated nylon 6 production Waste Water Centralized is entered into conditioning tank, water circulating pump is provided in conditioning tank and is used for
Even water quality；
(2) waste water of conditioning tank is evacuated in anaerobic granular sludge bed reactor, is added in anaerobic granular sludge bed reactor
Microelement and sodium carbonate, and utilize the pollutant in anaerobic bacteria degrading waste water；The dosage of microelement is in 3ml/L；Carbonic acid
The dosage of sodium is 250ml/L；Within the scope of above-mentioned microelement dosage, the activity of anaerobic bacteria is strong, and treatment effeciency is high；On and
It states within the scope of sodium carbonate dosage, the anti-shock loading of anaerobic system is high, stable.
(3) the water outlet gravity flow in anaerobic granular sludge bed reactor enters anoxic pond, and blender is arranged in anoxic pond
For waste water and anoxic microorganism to be sufficiently mixed, while adding carbon source and guaranteeing denitrification effect；Wherein by conditioning tank effluent part
It is introduced directly into anoxic pond as carbon source, keeps C/N ratio 5-6 in pond that can individually add when aforesaid operations cause carbon source deficiency
Carbon source；And aforesaid operations had not only improved treatment effeciency, but also can reduce the dosage of carbon source.
(4) the water outlet gravity flow of anoxic pond enters aerobic carrier flow bed, and waste water continues to give birth in aerobic carrier flow bed
Change degradation, and part mixed liquor is back in anoxic pond and carries out denitrification denitrogenation；Wherein aerobic carrier additional amount is aerobic load
The 30-50% of body thermopnore dischargeable capacity can increase the contact area of aerobic microbiological and pollutant by this preferred embodiment,
It can be avoided carrier the aerating system in aerobic carrier flow bed is caused to bear.
(5) water outlet of aerobic carrier flow bed enters secondary settling tank and is precipitated, and the precipitating sludge of secondary settling tank largely flows back
The quantity of aerobic microbiological is kept into anoxic pond, fraction precipitating sludge is discharged into sludge concentration tank；
(6) water outlet of secondary settling tank enters ozone high grade oxidation system, is difficult to degrade by the strong oxidizing property removal biochemistry of ozone
Pollutant, and for decomposing the suspended particulate fine crushing for failing to precipitate in time in secondary settling tank；The water outlet of ozone high grade oxidation system is straight
It connects and is emitted into environment；Ozone dosage is 30mg/L, stablizes water outlet COD in 20-30mg/L, is discharged TN < 5mg/L, water outlet
Suspended particulate can meet level-one emission standard A less than 10 < mg/L, effluent quality.
(7) sludge in sludge concentration tank carries out thickening by plate and frame filter press, and filtrate is back to conditioning tank, mud cake
Outward transport processing.
Embodiment 3:
As shown in Figure 1, a kind of 6 production wastewater treatment process of nylon of the present embodiment description, specifically comprise the following steps:
(1) untreated nylon 6 production Waste Water Centralized is entered into conditioning tank, water circulating pump is provided in conditioning tank and is used for
Even water quality；
(2) waste water of conditioning tank is evacuated in anaerobic granular sludge bed reactor, is added in anaerobic granular sludge bed reactor
Microelement and sodium carbonate, and utilize the pollutant in anaerobic bacteria degrading waste water；The dosage of microelement is in 2ml/L；Carbonic acid
The dosage of sodium is 280ml/L；Within the scope of above-mentioned microelement dosage, the activity of anaerobic bacteria is strong, and treatment effeciency is high；On and
It states within the scope of sodium carbonate dosage, the anti-shock loading of anaerobic system is high, stable.
(3) the water outlet gravity flow in anaerobic granular sludge bed reactor enters anoxic pond, and blender is arranged in anoxic pond
For waste water and anoxic microorganism to be sufficiently mixed, while adding carbon source and guaranteeing denitrification effect；Wherein by conditioning tank effluent part
It is introduced directly into anoxic pond as carbon source, keeps C/N ratio 5-6 in pond that can individually add when aforesaid operations cause carbon source deficiency
Carbon source；And aforesaid operations had not only improved treatment effeciency, but also can reduce the dosage of carbon source.
(4) the water outlet gravity flow of anoxic pond enters aerobic carrier flow bed, and waste water continues to give birth in aerobic carrier flow bed
Change degradation, and part mixed liquor is back in anoxic pond and carries out denitrification denitrogenation；Wherein aerobic carrier additional amount is aerobic load
The 30-50% of body thermopnore dischargeable capacity can increase the contact area of aerobic microbiological and pollutant by this preferred embodiment,
It can be avoided carrier the aerating system in aerobic carrier flow bed is caused to bear.
(5) water outlet of aerobic carrier flow bed enters secondary settling tank and is precipitated, and the precipitating sludge of secondary settling tank largely flows back
The quantity of aerobic microbiological is kept into anoxic pond, fraction precipitating sludge is discharged into sludge concentration tank；
(6) water outlet of secondary settling tank enters ozone high grade oxidation system, is difficult to degrade by the strong oxidizing property removal biochemistry of ozone
Pollutant, and for decomposing the suspended particulate fine crushing for failing to precipitate in time in secondary settling tank；The water outlet of ozone high grade oxidation system is straight
It connects and is emitted into environment；Ozone dosage is 25mg/L, stablizes water outlet COD in 20-30mg/L, is discharged TN < 5mg/L, water outlet
Suspended particulate can meet level-one emission standard A less than 10 < mg/L, effluent quality.
(7) sludge in sludge concentration tank carries out thickening by plate and frame filter press, and filtrate is back to conditioning tank, mud cake
Outward transport processing.
Embodiment 4:
As shown in Fig. 2, a kind of nylon 6 of the present embodiment description produces waste water high-efficiency processing unit, including wastewater equalization pond 1, detest
Oxygen is granular mud bed 2, anoxic pond 3, CBR carrier flow bed 4, ASR activated sludge tank 5, sedimentation basin 6, ozone reaction tower 13, discharge
Pond 15；Wastewater equalization pond 1 is equipped with delivery pipe, and delivery pipe is connected to anaerobic granular sludge bed 2, wherein anaerobic granular sludge bed 2
Upper end three phase separator 7 is set, be provided with overflow launder 8 on anaerobic granular sludge bed 2, overflow launder 8 by piping connection extremely
Compound aerobic device, compound aerobic device are successively divided into anoxic pond 3, CBR carrier flow bed 4, ASR activated sludge tank by baffle
5 and sedimentation basin 6, it is connected by the multilayer pore that baffle upper end is arranged between adjacent pond body, overflow launder 8 is connected to anoxic pond 3, anoxic pond
Mechanical stirring mechanism 9 is equipped in 3, anoxic pond 3, CBR carrier flow bed 4 and ASR activated sludge tank 5 are both provided with activated sludge
It is provided with biofilm carrier 10 in 11, CBR carrier flow beds 4, the bottom of CBR carrier flow bed 4 and ASR activated sludge tank 5 is set
It is equipped with aerating system 12, for ASR activated sludge tank 5 with to anoxic pond 3, there is sludge concentration tank in 6 bottom of sedimentation basin by piping connection
16,6 upper end outlet of sedimentation basin is connected to ozone reaction tower 13, and ozone reaction tower 13 is equipped with overflow pipe 14, and overflow pipe 14 connects
To discharge pond 15, discharge pond 15 passes through piping connection to waste water pipe network.Above-mentioned mechanical stirring mechanism 9 includes motor, agitating shaft
And stirring blade；Delivery pump is provided on pipeline in addition to overflow launder 8, overflow pipe 14, it is ensured that waste water normally conveys.
Methane recovery mechanism is provided on anaerobic granular sludge bed 2, comprising: set at the top of anaerobic granular sludge bed 2
The gas-guide tube set, gas-guide tube connect three phase separator 7, and gas-guide tube is connected to methane purifying device 18, and methane purifying device 18 connects
It is connected to biogas storage tank 19.
The outlet of 6 upper end of sedimentation basin is connected to the lower end of ozone reaction tower 13 by pipeline, and the setting of overflow pipe 14 exists
The upper end of ozone reaction tower 13.
Sludge concentration tank 16 is connect by pipeline with plate type pressure filter 17, and sludge is pressed into mud cake by plate type pressure filter 17,
The filtrate that plate type pressure filter 17 extrudes is connected to wastewater equalization pond 1 by pipeline.
Claims (8)
1. a kind of nylon 6 produces waste water high-efficiency processing unit, including wastewater equalization pond, anaerobic granular sludge bed, anoxic pond, CBR
Carrier flow bed, ASR activated sludge tank, sedimentation basin, ozone reaction tower, discharge pond；It is characterized in that: wastewater equalization pond is equipped with defeated
Pipe is sent, delivery pipe is connected to anaerobic granular sludge bed, and wherein three phase separator is arranged in the upper end of anaerobic granular sludge bed, in anaerobism
Overflow launder is provided on granular mud bed, overflow launder is by piping connection to compound aerobic device, and compound aerobic device is by baffle
Successively it is divided into anoxic pond, CBR carrier flow bed, ASR activated sludge tank and sedimentation basin, is arranged between adjacent pond body by baffle upper end
The connection of multilayer pore, overflow launder is connected to anoxic pond, mechanical stirring mechanism, anoxic pond, CBR carrier flow is equipped in anoxic pond
Bed and ASR activated sludge tank are both provided with activated sludge, and biofilm carrier, CBR carrier flow are provided in CBR carrier flow bed
The bottom of bed and ASR activated sludge tank is provided with aerating system, and ASR activated sludge tank and precipitating bottom of pond portion are equipped with mud return line
And it is connected to anoxic pond, precipitating bottom of pond portion by piping connection has sludge concentration tank, and sedimentation basin upper end outlet is connected to ozone
Reaction tower, ozone reaction tower are equipped with overflow pipe, and overflow pipe is connected to discharge pond, and discharge pond passes through piping connection to waste pipe
Net.
2. a kind of nylon 6 according to claim 1 produces waste water high-efficiency processing unit, it is characterized in that: sedimentation basin upper end
Outlet is connected to the lower end of ozone reaction tower by pipeline, and the upper end of ozone reaction tower is arranged in the overflow pipe.
3. a kind of nylon 6 according to claim 1 produces waste water high-efficiency processing unit, it is characterized in that: sludge concentration tank is logical
Piping is connect with plate type pressure filter, and sludge is pressed into mud cake by plate type pressure filter, and the filtrate that plate type pressure filter extrudes passes through pipe
Road is connected to wastewater equalization pond.
4. a kind of 6 production wastewater treatment process of nylon, it is characterized in that: specifically comprising the following steps:
(1) untreated nylon 6 production Waste Water Centralized is entered into conditioning tank, water circulating pump is provided in conditioning tank and is used for
Even water quality；
(2) waste water of conditioning tank is evacuated in anaerobic granular sludge bed reactor, is added in anaerobic granular sludge bed reactor
Microelement and sodium carbonate, and utilize the pollutant in anaerobic bacteria degrading waste water；
(3) the water outlet gravity flow in anaerobic granular sludge bed reactor enters anoxic pond, and blender is arranged in anoxic pond and is used for
Waste water and anoxic microorganism are sufficiently mixed, while adding carbon source and guaranteeing denitrification effect；
(4) the water outlet gravity flow of anoxic pond enters aerobic carrier flow bed, and waste water continues biochemical drop in aerobic carrier flow bed
Solution, and part mixed liquor is back in anoxic pond and carries out denitrification denitrogenation；
(5) water outlet of aerobic carrier flow bed enters secondary settling tank and is precipitated, and the precipitating sludge of secondary settling tank is largely back to scarce
The quantity of aerobic microbiological is kept in oxygen pond, fraction precipitating sludge is discharged into sludge concentration tank；
(6) water outlet of secondary settling tank enters ozone high grade oxidation system, is difficult to degrade by the strong oxidizing property removal biochemistry of ozone
Pollutant, and for decomposing the suspended particulate fine crushing for failing to precipitate in time in secondary settling tank；The water outlet of ozone high grade oxidation system is straight
It connects and is emitted into environment；
(7) sludge in sludge concentration tank carries out thickening by plate and frame filter press, and filtrate is back to conditioning tank, mud cake outward transport
Processing.
5. 6 production wastewater treatment process of a kind of nylon according to claim 5, it is characterized in that: microelement in step (2)
Dosage in 1-3ml/L；The dosage of sodium carbonate is 250-300ml/L.
6. 6 production wastewater treatment process of a kind of nylon according to claim 5, it is characterized in that: will be adjusted in step (3)
Pond effluent part is introduced directly into anoxic pond as carbon source, keeps C/N ratio 5-6 in pond.
7. 6 production wastewater treatment process of a kind of nylon according to claim 5, it is characterized in that: in step (4), aerobic load
The 30-50% of body additional amount preferably carrier of oxygen thermopnore dischargeable capacity.
8. 6 production wastewater treatment process of a kind of nylon according to claim 5, it is characterized in that: ozone is thrown in step (6)
Dosage is 20-30 mg/L, and effluent quality can meet level-one emission standard A.
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Cited By (2)
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| CN114436473A (en) * | 2022-01-26 | 2022-05-06 | 北京铭泽源环境工程有限公司 | Full-flow nylon 66 salt production wastewater treatment method |
| CN115259568A (en) * | 2022-08-17 | 2022-11-01 | 广东省适然环境科技研究有限公司 | Treatment method for treating chemical wastewater by using ozone advanced oxidation technology |
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