CN206337122U - Polyetherpolyols production wastewater biological treatment device - Google Patents
Polyetherpolyols production wastewater biological treatment device Download PDFInfo
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- CN206337122U CN206337122U CN201621409934.1U CN201621409934U CN206337122U CN 206337122 U CN206337122 U CN 206337122U CN 201621409934 U CN201621409934 U CN 201621409934U CN 206337122 U CN206337122 U CN 206337122U
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- 239000002351 wastewater Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000010802 sludge Substances 0.000 claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 22
- 230000003647 oxidation Effects 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 238000005273 aeration Methods 0.000 claims description 7
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 2
- 239000003814 drug Substances 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 239000004721 Polyphenylene oxide Substances 0.000 abstract description 15
- 229920000570 polyether Polymers 0.000 abstract description 15
- 229920005862 polyol Polymers 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 12
- 150000003077 polyols Chemical class 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000010865 sewage Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000000945 filler Substances 0.000 abstract description 5
- 239000002071 nanotube Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 description 23
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 3
- 235000019796 monopotassium phosphate Nutrition 0.000 description 3
- 238000010979 pH adjustment Methods 0.000 description 3
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 102100040998 Conserved oligomeric Golgi complex subunit 6 Human genes 0.000 description 1
- 102100033969 Guanylyl cyclase-activating protein 1 Human genes 0.000 description 1
- 101000748957 Homo sapiens Conserved oligomeric Golgi complex subunit 6 Proteins 0.000 description 1
- 101001068480 Homo sapiens Guanylyl cyclase-activating protein 1 Proteins 0.000 description 1
- 201000000465 X-linked cone-rod dystrophy 2 Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- -1 ether polyol Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
本实用新型涉及一种聚醚多元醇生产废水生物处理装置，属于环境工程技术领域。该装置主要由调节池、CBR池、活性污泥池、二沉池、臭氧氧化池、剩余污泥池、污泥脱水机和集水池组成；采用载体填料反应技术、活性污泥法和臭氧氧化反应技术处理废水，聚醚多元醇生产废水和生活污水经本系统处理后达到纳管排放要求，该装置工作稳定、效率高，出水水质稳定、便于自动化控制、管理和操作，运行成本低，有效解决了传统生物处理方法不可降价性处问题，同时本装置适用于同类高浓度有机废水的生物处理。
The utility model relates to a biological treatment device for polyether polyol production wastewater, which belongs to the technical field of environmental engineering. The device is mainly composed of a regulating tank, a CBR tank, an activated sludge tank, a secondary settling tank, an ozone oxidation tank, an excess sludge tank, a sludge dehydrator and a water collection tank; it adopts carrier filler reaction technology, activated sludge method and ozone oxidation Reaction technology treats wastewater. Polyether polyol production wastewater and domestic sewage are treated by this system to meet the requirements of nanotube discharge. The device works stably, has high efficiency, and the effluent quality is stable. It is convenient for automatic control, management and operation. It has low operating cost and is effective. It solves the problem of non-reducibility of traditional biological treatment methods, and at the same time, the device is suitable for biological treatment of similar high-concentration organic wastewater.
Description
技术领域technical field
本实用新型涉及一种聚醚多元醇生产废水生物处理装置，主要针对含聚醚多元醇、聚醚、苯乙烯、异丙醇等有机污染物的聚醚多元醇生产废水处理，属于环境工程技术领域。The utility model relates to a biological treatment device for polyether polyol production wastewater, which is mainly aimed at the treatment of polyether polyol production wastewater containing organic pollutants such as polyether polyol, polyether, styrene and isopropanol, and belongs to environmental engineering technology field.
背景技术Background technique
聚醚生产废水是有机化工难降解废水中难度较大的一类废水，其废水含大量大分子聚合物，废水COD值较高，废水B/C低，具有生物可降解性差等特点，一般与生产区生活污水混合后仍在3,000 mg/L以上。目前处理同类有机化工废水的方法主要有：厌氧-好氧接触氧化、厌氧-好氧接触氧化-生物活性碳等，通常还辅以化学氧化处理，废水经处理后一般仅达到纳管标准。这些工艺系统流程长，设备、结构复杂，不利于运行和管理。Polyether production wastewater is a difficult type of wastewater in organic chemical refractory wastewater. Its wastewater contains a large number of macromolecular polymers, its COD value is high, its B/C is low, and it has the characteristics of poor biodegradability. The mixed domestic sewage in the production area is still above 3,000 mg/L. At present, the methods for treating similar organic chemical wastewater mainly include: anaerobic-aerobic contact oxidation, anaerobic-aerobic contact oxidation-biologically activated carbon, etc., usually supplemented by chemical oxidation treatment, and the treated wastewater generally only reaches the nanotube standard . These process systems have long processes, complex equipment and structures, which are not conducive to operation and management.
实用新型内容Utility model content
为克服上述缺陷，本实用新型的技术目的在于结合生产实际提供了一种聚醚多元醇生产废水生物处理装置，使得该装置结构简单、流程简洁，可操作性和系统安全性好，能解决聚醚多元醇废水可生物降解性差的问题，又可以降低废水处理成本。In order to overcome the above defects, the technical purpose of this utility model is to provide a biological treatment device for polyether polyol production wastewater in combination with the actual production, so that the device has a simple structure, a concise process, good operability and system safety, and can solve the problem of polyether polyol production wastewater. The problem of poor biodegradability of ether polyol wastewater can reduce the cost of wastewater treatment.
为了实现本实用新型的技术目的，本实用新型的技术方案是：In order to realize the technical purpose of the utility model, the technical solution of the utility model is:
一种聚醚多元醇生产废水生物处理装置，其特征在于主要由调节池、载体填料反应池（CBR池）、活性污泥池、二沉池、臭氧氧化池、剩余污泥池、污泥脱水机和集水池组成；调节池、CBR池、活性污泥池、二沉池、臭氧氧化池、排放池、集水池上均设置有进水口和出水口；二沉池、剩余污泥池上均设置有污泥出口；CBR池和剩余污泥池上均设置有污泥进口；其中调节池出水口通过泵连接CBR池进水口，CBR池出水口通过隔离筛网连接活性污泥池进水口，活性污泥池出水口连接二沉池进水口，二沉池出水口连接臭氧氧化池进水口，臭氧氧化池出水口连接排放池进水口；二沉池的污泥出口分别通过泵连接CBR池和剩余污泥池的污泥进口；剩余污泥池的污泥出口连接污泥脱水机，污泥脱水机上设置的滤液出口连接集水池进水口，集水池出水口通过泵连接调节池。A polyether polyol production wastewater biological treatment device, characterized in that it is mainly composed of a regulating tank, a carrier filler reaction tank (CBR tank), an activated sludge tank, a secondary sedimentation tank, an ozone oxidation tank, an excess sludge tank, and a sludge dehydration tank. It consists of machine and water collection tank; water inlets and outlets are set on regulating tank, CBR tank, activated sludge tank, secondary sedimentation tank, ozonation tank, discharge tank and water collection tank; secondary sedimentation tank and excess sludge tank are all equipped with There is a sludge outlet; both the CBR tank and the excess sludge tank are equipped with sludge inlets; the outlet of the regulating tank is connected to the water inlet of the CBR tank through a pump, and the outlet of the CBR tank is connected to the water inlet of the activated sludge tank through an isolation screen. The outlet of the mud tank is connected to the water inlet of the secondary sedimentation tank, the outlet of the secondary sedimentation tank is connected to the water inlet of the ozone oxidation tank, and the outlet of the ozone oxidation tank is connected to the water inlet of the discharge tank; the sludge outlet of the secondary sedimentation tank is connected to the CBR tank and the remaining sewage through the pump respectively. The sludge inlet of the sludge tank; the sludge outlet of the remaining sludge tank is connected to the sludge dehydrator, the filtrate outlet set on the sludge dehydrator is connected to the water inlet of the sump, and the outlet of the sump is connected to the regulating tank through a pump.
其中，本实用新型所述的聚醚多元醇生产废水处理装置还包括事故池，事故池上设置有出水口和进水口；且事故池出水口通过泵连接调节池进水口。Wherein, the polyether polyol production wastewater treatment device described in the utility model also includes an accident pool, and the accident pool is provided with a water outlet and a water inlet; and the water outlet of the accident pool is connected to the water inlet of the adjustment pool through a pump.
其中，所述的调节池还设有加药系统和搅拌系统；所述的加药系统包括pH调节和磷酸盐投加装置；所述的CBR池设有污泥回流口，同时投加载体生物填料；CBR池和活性污泥池均设有鼓风曝气系统；所述的二沉池进水口设置进水分布装置。Wherein, the regulating tank is also provided with a dosing system and a stirring system; the dosing system includes a pH adjustment and phosphate dosing device; Filling; both the CBR tank and the activated sludge tank are equipped with a blast aeration system; the water inlet of the secondary sedimentation tank is provided with a water distribution device.
本实用新型的有益效果在于：The beneficial effects of the utility model are:
本实用新型采用载体生物填料反应与活性污泥反应以及臭氧氧化相结合的技术处理聚醚多元醇生产废水，利用载体生物膜技术提高了生物处理负荷，出水COD低，利用臭氧氧化技术降低不可生化有机物浓度，确保出水B/C达到纳管排放要求。系统工作稳定，处理效果好。本实用新型同样适用于其他类似高浓度有机工艺废水的生物处理。The utility model adopts the combination technology of carrier biological filler reaction, activated sludge reaction and ozone oxidation to treat polyether polyol production wastewater, uses the carrier biofilm technology to increase the biological treatment load, the effluent COD is low, and uses the ozone oxidation technology to reduce non-biochemical The concentration of organic matter ensures that the effluent B/C meets the discharge requirements of nanotubes. The system works stably and the processing effect is good. The utility model is also applicable to the biological treatment of other similar high-concentration organic process wastewater.
附图说明Description of drawings
图1为本实用新型示意图。Fig. 1 is the utility model schematic diagram.
具体实施方式detailed description
如图1所示，本实用新型的聚醚多元醇生产废水生物处理装置主要由调节池、载体填料反应池（CBR池）、活性污泥池、二沉池、臭氧氧化池、剩余污泥池、污泥脱水机和集水池组成；调节池、CBR池、活性污泥池、二沉池、臭氧氧化池、排放池、集水池上均设置有进水口和出水口；二沉池、剩余污泥池上均设置有污泥出口；CBR池和剩余污泥池上均设置有污泥进口；其中调节池出水口通过泵连接CBR池进水口，CBR池出水口通过隔离筛网连接活性污泥池进水口，活性污泥池出水口连接二沉池进水口，二沉池出水口连接臭氧氧化池进水口，臭氧氧化池出水口连接排放池进水口；二沉池的污泥出口分别通过泵连接CBR池和剩余污泥池的污泥进口；剩余污泥池的污泥出口连接污泥脱水机，污泥脱水机上设置的滤液出口连接集水池进水口，集水池出水口通过泵连接调节池。As shown in Figure 1, the polyether polyol production wastewater biological treatment device of the utility model is mainly composed of a regulating tank, a carrier filler reaction tank (CBR tank), an activated sludge tank, a secondary sedimentation tank, an ozone oxidation tank, and an excess sludge tank. , sludge dewatering machine and water collection tank; regulating tank, CBR tank, activated sludge tank, secondary sedimentation tank, ozone oxidation tank, discharge tank, and water collection tank are all equipped with water inlets and outlets; secondary sedimentation tank, residual sewage Sludge outlets are installed on the mud tank; sludge inlets are installed on the CBR tank and the excess sludge tank; the outlet of the regulating tank is connected to the water inlet of the CBR tank through a pump, and the outlet of the CBR tank is connected to the inlet of the activated sludge tank through an isolation screen. The water outlet, the outlet of the activated sludge tank is connected to the water inlet of the secondary sedimentation tank, the outlet of the secondary sedimentation tank is connected to the water inlet of the ozone oxidation tank, the outlet of the ozone oxidation tank is connected to the water inlet of the discharge tank; the sludge outlet of the secondary sedimentation tank is connected to the CBR through the pump The sludge inlet of the pool and the excess sludge pool; the sludge outlet of the excess sludge pool is connected to the sludge dehydrator, the filtrate outlet set on the sludge dehydrator is connected to the water inlet of the sump, and the outlet of the sump is connected to the regulating pool through a pump.
其中，本实用新型所述的聚醚多元醇生产废水处理装置还包括事故池，事故池上设置有出水口和进水口；且事故池出水口通过泵连接调节池进水口。Wherein, the polyether polyol production wastewater treatment device described in the utility model also includes an accident pool, and the accident pool is provided with a water outlet and a water inlet; and the water outlet of the accident pool is connected to the water inlet of the adjustment pool through a pump.
其中，所述的调节池还设有加药系统和搅拌系统；所述的加药系统包括pH调节和磷酸盐投加装置；所述的CBR池设有污泥回流口，同时投加载体生物填料；CBR池和活性污泥池均设有鼓风曝气系统；所述的二沉池进水口设置进水分布装置。Wherein, the regulating tank is also provided with a dosing system and a stirring system; the dosing system includes a pH adjustment and phosphate dosing device; Filling; both the CBR tank and the activated sludge tank are equipped with a blast aeration system; the water inlet of the secondary sedimentation tank is provided with a water distribution device.
操作时，聚醚生产装置开停车或事故期间废水进入事故池，正常生产时工艺废水和生活污水进入调节池，同时缓慢调入事故池废水，调节池还设有加药系统和搅拌系统；装置运行时调节池出水经提升泵输入CBR池；CBR池设有污泥回流口；装置运行时二沉池污泥经污泥回流装置输入载体填料反应池，回流污泥补充反应池污泥浓度；CBR池出水口通过筛网与活性污泥池进水口相连；CBR池和活性污泥池均设有鼓风曝气系统；活性污泥池出水口与二沉池进水口相连，沉淀池出水口与臭氧氧化池进水口相连，二沉池排泥口通过泵与CBR池和剩余污泥池入口相连，臭氧氧化池出水口与排放池相连，剩余污泥池污泥通过泵输入污泥脱水机入口，污泥脱水机滤液出口与集水池入口相连。During operation, the polyether production unit starts and stops or the waste water enters the accident pool during the accident. During normal production, the process wastewater and domestic sewage enter the adjustment pool, and at the same time slowly transfer the waste water from the accident pool. The adjustment pool is also equipped with a dosing system and a stirring system; the device During operation, the effluent from the adjustment tank is input into the CBR tank through the lifting pump; the CBR tank is equipped with a sludge return port; when the device is in operation, the sludge from the secondary settling tank is input into the carrier filler reaction tank through the sludge return device, and the return sludge supplements the sludge concentration of the reaction tank; The outlet of the CBR tank is connected to the inlet of the activated sludge tank through a screen; both the CBR tank and the activated sludge tank are equipped with a blast aeration system; the outlet of the activated sludge tank is connected to the inlet of the secondary sedimentation tank, and the outlet of the sedimentation tank It is connected to the water inlet of the ozone oxidation tank, the sludge outlet of the secondary sedimentation tank is connected to the inlet of the CBR tank and the remaining sludge tank through the pump, the water outlet of the ozone oxidation tank is connected to the discharge tank, and the sludge of the remaining sludge tank is input into the sludge dewatering machine through the pump The inlet and the filtrate outlet of the sludge dewatering machine are connected to the inlet of the sump.
本实用新型还包括计算机控制装置，计算机控制装置的控制输入输出与系统的部分或全部用电设施的控制电路连接。The utility model also includes a computer control device, the control input and output of the computer control device are connected with the control circuits of part or all of the electric facilities of the system.
COD高达3,000mg/L的调节池废水经本使用新型装置处理后出水COD低于500mg/L，B/C大于0.3，达到纳管排放要求。The wastewater from the adjustment tank with COD as high as 3,000mg/L is treated by this new device, and the effluent COD is lower than 500mg/L, and B/C is greater than 0.3, which meets the discharge requirements of nanotubes.
实施例（1）：Example (1):
工艺废水和生活污水混合后COD2,890mg/L，经pH调节至7.8，投加磷酸二氢钾使废水总磷达到10mg/L；调节池废水经泵提升至CBR池，载体投加量达到30%，容积负荷3.0-3.3kgCOD/m3d；CBR出水自流至活性污泥池，容积负荷1.0-1.2kgCOD/m3d，控制活性污泥池悬浮污泥浓度3,600-4,000mg/L；活性污泥池出水自流至二沉池，经泥水分离后，沉淀污泥部分回流至CBR反应池，剩余污泥排至污泥脱水，二沉池上清液自流进入臭氧氧化池，此时废水COD已降低至428mg/L；废水经臭氧曝气氧化后，COD进一步降低至386mg/L以下，同时废水B/C比提升至0.31，出水水质整体达到工业园区纳管标准（污水综合排放标准GB8978-1996的三级标准）。After the process wastewater and domestic sewage are mixed, COD2, 890mg/L, the pH is adjusted to 7.8, and potassium dihydrogen phosphate is added to make the total phosphorus of the wastewater reach 10mg/L; the wastewater from the adjustment tank is pumped to the CBR tank, and the dosage of the carrier reaches 30 %, the volume load is 3.0-3.3kgCOD/m 3 d; the CBR effluent flows to the activated sludge tank by itself, the volume load is 1.0-1.2kgCOD/m 3 d, and the suspended sludge concentration in the activated sludge tank is controlled to 3,600-4,000mg/L; The effluent from the sludge tank flows to the secondary sedimentation tank by itself. After the mud-water separation, part of the settled sludge flows back to the CBR reaction tank, and the remaining sludge is discharged to the sludge dehydration. The supernatant of the secondary sedimentation tank flows into the ozone oxidation tank by itself. Reduced to 428mg/L; After the wastewater is oxidized by ozone aeration, the COD is further reduced to below 386mg/L, and the B/C ratio of the wastewater is increased to 0.31. level 3 standard).
实施例（2）：Example (2):
工艺废水和生活污水混合后COD3,190mg/L，经pH调节至7.5，投加磷酸二氢钾使废水总磷达到11mg/L；调节池废水经泵提升至CBR池，载体投加量达到36%，容积负荷2.8-3.0kgCOD/m3d；CBR出水自流至活性污泥池，容积负荷0.8-0.9kgCOD/m3d，控制活性污泥池悬浮污泥浓度3,200-3,600mg/L；活性污泥池出水自流至二沉池，经泥水分离后，沉淀污泥部分回流至CBR反应池，剩余污泥排至污泥脱水，二沉池上清液自流进入臭氧氧化池，此时废水COD已降低至340mg/L；废水经臭氧曝气氧化后，COD进一步降低至300mg/L以下，同时废水B/C比提升至0.30，出水水质整体达到工业园区纳管标准（污水综合排放标准GB8978-1996的三级标准）。After the process wastewater and domestic sewage are mixed, the COD3, 190mg/L, is adjusted to 7.5 by pH, and potassium dihydrogen phosphate is added to make the total phosphorus of the wastewater reach 11mg/L; the wastewater from the adjustment tank is pumped to the CBR tank, and the dosage of the carrier reaches 36 %, the volume load is 2.8-3.0kgCOD/m 3 d; the CBR effluent flows to the activated sludge tank by itself, the volume load is 0.8-0.9kgCOD/m 3 d, and the suspended sludge concentration in the activated sludge tank is controlled to 3,200-3,600mg/L; The effluent from the sludge tank flows to the secondary sedimentation tank by itself. After the mud-water separation, part of the settled sludge flows back to the CBR reaction tank, and the remaining sludge is discharged to the sludge dehydration. The supernatant of the secondary sedimentation tank flows into the ozone oxidation tank by itself. Reduced to 340mg/L; After the wastewater is oxidized by ozone aeration, the COD is further reduced to below 300mg/L, and the B/C ratio of the wastewater is increased to 0.30. level 3 standard).
实施例（3）：Embodiment (3):
工艺废水和生活污水混合后COD3,080mg/L，经pH调节至8.1，投加磷酸二氢钾使废水总磷达到10mg/L；调节池废水经泵提升至CBR池，载体投加量达到39%，容积负荷3.2-3.5kgCOD/m3d；CBR出水自流至活性污泥池，容积负荷0.8-1.1kgCOD/m3d，控制活性污泥池悬浮污泥浓度4,000-4,500mg/L；活性污泥池出水自流至二沉池，经泥水分离后，沉淀污泥部分回流至CBR反应池，剩余污泥排至污泥脱水，二沉池上清液自流进入臭氧氧化池，此时废水COD已降低至468mg/L；废水经臭氧曝气氧化后，COD进一步降低至432mg/L以下，同时废水B/C比提升至0.32，出水水质整体达到工业园区纳管标准（污水综合排放标准GB8978-1996的三级标准）。After the process wastewater and domestic sewage are mixed, COD3,080mg/L is adjusted to 8.1 after pH adjustment, and potassium dihydrogen phosphate is added to make the total phosphorus of the wastewater reach 10mg/L; the wastewater from the adjustment tank is pumped to the CBR tank, and the dosage of the carrier reaches 39 %, the volume load is 3.2-3.5kgCOD/m 3 d; the CBR effluent flows to the activated sludge tank by itself, the volume load is 0.8-1.1kgCOD/m 3 d, and the suspended sludge concentration in the activated sludge tank is controlled to 4,000-4,500mg/L; The effluent from the sludge tank flows to the secondary sedimentation tank by itself. After the mud-water separation, part of the settled sludge flows back to the CBR reaction tank, and the remaining sludge is discharged to the sludge dehydration. The supernatant of the secondary sedimentation tank flows into the ozone oxidation tank by itself. Reduced to 468mg/L; After the wastewater is oxidized by ozone aeration, the COD is further reduced to below 432mg/L, and the B/C ratio of the wastewater is increased to 0.32. level 3 standard).
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