Production line for treating organic peroxide sewage

Abstract

The utility model provides a production line for treating organic peroxide sewage, which relates to the field of sewage treatment and sequentially comprises an adjusting tank, a coagulative precipitation tank, a hydrolysis acidification tank, an A / O tank, an MBBR (moving bed biofilm reactor) tank, an MBR (membrane bioreactor) tank, a COD (chemical oxygen demand) separation device and an adsorption device. A water outlet of the regulating tank is communicated with a water inlet of the coagulative precipitation tank, and a water outlet of the coagulative precipitation tank is communicated with a water inlet of the hydrolysis acidification tank; a water outlet of the hydrolysis acidification pool is communicated with a water inlet of the anoxic pool, a water outlet of the anoxic pool is communicated with a water inlet of the aerobic pool, a water outlet of the aerobic pool is communicated with a water inlet of the MBBR pool, a water outlet of the MBBR pool is communicated with a water inlet of the MBR pool, a water outlet of the MBR pool is communicated with a water inlet of the water producing pool, and a water outlet of the water producing pool is communicated with a water inlet of the COD separation device through a water outlet pipe; a water outlet of the COD separation device is communicated with a water inlet of the adsorption device, and a concentrated water port is communicated with the ozone catalysis device. The device has the beneficial effect of effectively treating the organic peroxide sewage.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, in particular to a production line for treating organic peroxide sewage. Background Art

[0002] The organic peroxide production wastewater in an industrial area in Tianjin contains a large amount of organic peroxides. In addition to peroxides, it also contains phosphorus, nitrogen, etc. The organic matter in the wastewater is complex and has poor biodegradability. The organic peroxide wastewater contains specific pollutants such as tert-butyl alcohol and tert-butyl hydroperoxide, as well as ketone peroxide, peroxycarbonate, peroxyester, peroxyacyl, peroxyketal and hydroperoxide. The characteristics of this organic peroxide wastewater are strong irritating odor, difficult to degrade, high toxicity, and low biodegradability (B / C<0.2). The difficulty of biological survival further makes the treatment of organic pollutants difficult. According to the analysis of water quality, the influent COD is ≤400mg / L, the difficult-to-degrade COD in the influent COD is 100-150mg / L, SS is ≤400mg / L, ammonia nitrogen is ≤10mg / L, TN is between 2-35mg / L, TP is ≤8mg / L, TDS is ≤8000mg / L, pH is 6-9, chromaticity is ≤64, the biodegradability of sewage is poor and the salt content is high, so how to treat this kind of sewage to achieve the discharge index is the top priority. Therefore, we designed a sewage treatment production line. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a sewage treatment production line which can effectively treat sewage with high peroxide content.

[0004] The technical solution of the utility model is:

[0005] A production line for treating organic peroxide wastewater, which comprises a regulating tank, a coagulation sedimentation tank, a hydrolysis acidification tank, an A / O tank, an MBBR tank, an MBR tank, a COD separation device, and an adsorption device in sequence;

[0006] The water outlet of the regulating tank is connected to the water inlet of the coagulation sedimentation tank through a pipeline, and the water outlet of the coagulation sedimentation tank is connected to the water inlet of the hydrolysis acidification tank through a pipeline; the A / O tank includes an anoxic tank and an aerobic tank in sequence, the water outlet of the hydrolysis acidification tank is connected to the water inlet of the anoxic tank, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank, the water outlet of the aerobic tank is connected to the water inlet of the MBBR tank, the MBR tank is divided into an MBR water tank and a water production tank, the water outlet of the MBBR tank is connected to the water inlet of the MBR water tank, the MBR water tank is provided with an MBR membrane, the water outlet of the MBR water tank is connected to the water inlet of the water production tank through a pipeline, and the water outlet of the water production tank is connected to the water inlet of the COD separation device through a water outlet pipe; the COD separation device is provided with a drain and a concentrated water outlet, the drain is connected to the water inlet of the adsorption device through a pipeline, and the concentrated water outlet is connected to the ozone catalytic device through a pipeline;

[0007] Furthermore, a water collecting tank is provided at the front end of the regulating tank; a drug adding port is provided in the regulating tank; the drug added into the regulating tank is a reducing agent;

[0008] The coagulation sedimentation tank is provided with a dosing port, and the agents added by the dosing pump are PAM and PAC; the bottom of the coagulation sedimentation tank is conical and provided with a sludge discharge port, and the sludge in the coagulation sedimentation tank is discharged to the sludge tank through the sludge discharge pump;

[0009] The hydrolysis acidification tank is provided with a sludge discharge port and a sludge inlet, the sludge discharge port is connected to the sludge tank through a pipeline, the hydrolysis acidification tank is provided with a water distribution system and a sludge discharge system, and the aeration device is controlled to make the dissolved oxygen in the hydrolysis acidification tank less than or equal to 0.2-0.3 mg / L and in an anoxic state; the hydrolysis acidification tank is divided into a sludge zone, a transition zone, and a clear water zone in sequence, the sludge zone contains a high concentration of facultative microbial layer, the facultative microbial layer comes from itself and the return sludge of the MBR water tank, and the sludge zone is provided with a sludge discharge port and a sludge inlet;

[0010] Further, the exhaust port of the hydrolysis acidification tank is connected to the deodorization device through a pipeline;

[0011] The anoxic tank is provided with a dosing port and a sludge return port, and an ORP meter is provided in the anoxic tank; an aeration device is provided in the aerobic tank; and a sludge return port is provided in the aerobic tank;

[0012] One end of the branch pipe I is connected to the mud outlet of the MBR water tank, and the other end is connected to the sludge return outlet of the anoxic tank and the aerobic tank;

[0013] One end of the branch pipe IV is connected to the branch pipe I, and the other end is connected to the mud inlet of the hydrolysis acidification tank;

[0014] The air outlets of the fans are respectively connected to the air inlets of the aerobic tank, the MBBR tank, and the MBR water tank;

[0015] The MBR water pool is equipped with a dosing port, and the added chemicals include sodium hypochlorite and citric acid;

[0016] The MBR water pool is provided with an MBR membrane; the MBR membrane in the MBR water pool is a PVDF mesoporous fiber membrane, i.e., a polyvinylidene fluoride membrane, and the pore size of the MBR membrane is 0.1 μm;

[0017] Two branch pipes are arranged in sequence on the pipeline between the MBR water tank and the water production tank, which are connected to the backwash water tank and the COD separation device respectively;

[0018] The clean water produced by the water production pool is pumped into the water production pool of the COD separation device through the water supply pump, COD safety filter, and COD separation membrane device;

[0019] There are two high-efficiency adsorption devices arranged in parallel between the COD separation device and the stabilization tank. The COD separation device is provided with a nanofiltration membrane. A dosing port is provided in front of the COD separation device. The added agents include bactericides, reducing agents, and scale inhibitors. The agents are metered into the COD separation device through a dosing pump. The clean water filtered by the COD separation device enters the high-efficiency adsorption device.

[0020] Furthermore, the nanofiltration membrane is a membrane separation technology between ultrafiltration and reverse osmosis. The separation layer of the nanofiltration membrane is a microporous structure of about 1nm. The COD separation membrane has a molecular weight cutoff between reverse osmosis membrane and ultrafiltration membrane, and is particularly suitable for substances with a molecular size of more than 1nm.

[0021] Furthermore, the adsorption device is provided with activated coke, which is used for adsorption to remove free chlorine, odor, chromaticity, organic matter, heavy metals and other impurities, the filtered water is discharged, and the concentrated water is returned to the regulating tank after ozone treatment;

[0022] Furthermore, valves and pumps are provided on the pipes for interconnecting the various pools. The valve types include water inlet valves, backwash valves, water supply valves, etc., and the pump types include reflux pumps, sludge pumps, dosing pumps, sludge discharge pumps, etc. The sludge has a water content of about 98%;

[0023] The drain outlet of the ozone catalytic device is connected to the water inlet of the regulating tank through a pipeline; further, one end of the branch pipe II is connected to the pipeline between the COD separation device and the ozone catalytic device, and a valve is provided on the branch pipe II, and the other end of the branch pipe II is connected to the pipeline between the ozone catalytic device and the regulating tank;

[0024] The concentrated water is treated by the ozone catalytic device and then enters the regulating tank. Under the catalytic action of ozone, hydroxyl free radicals are stimulated to form, and most of the difficult-to-degrade organic matter undergoes chain breaking reaction to form short-chain organic matter, which returns to the regulating tank for further biochemical treatment.

[0025] The beneficial effects of the utility model are:

[0026] According to the characteristics of peroxide water quality, we chose the process of equalization tank + coagulation sedimentation + hydrolysis acidification + A / O + MBBR filtration + MBR filtration + COD separation + activated coke high-efficiency adsorption + external discharge. This process has strong adaptability to water quality changes, high effluent water quality insurance coefficient, economic rationality and low cost.

[0027] Then, PAC and PAM are added to the coagulation sedimentation tank to remove phosphorus, so that Al 3+ It forms phosphate precipitate with soluble orthophosphate, and Al 3+ The formed multi-nuclear hydroxyl complex and aluminum hydroxide precipitate can also adsorb a portion of phosphorus, thereby achieving a stable phosphorus removal effect.

[0028] The wastewater further enters the hydrolysis and acidification tank. In view of the poor biodegradability of organic matter in the sewage, hydrolysis and acidification are first carried out to decompose long-chain organic molecules into short-chain molecules, which is conducive to the subsequent biochemical treatment. The hydrolysis and acidification tank is divided into a sludge zone, a transition zone and a clear water zone. The sludge bed is thicker, similar to a filter layer, so that the particulate matter and colloidal matter in the influent water can be quickly intercepted and adsorbed. Because the sludge bed contains a high concentration of facultative microorganisms, under the anoxic conditions in the tank, the intercepted organic matter is hydrolyzed into soluble substances by a large number of hydrolysis-acidogenic bacteria, and the macromolecular and difficult-to-biodegrade substances are converted into easily biodegradable substances. Using a hydrolysis and acidification tank instead of a conventional primary sedimentation tank, in addition to achieving the purpose of intercepting suspended matter in sewage, it also has the functions of partial biochemical treatment and sludge volume reduction and stabilization.

[0029] The advantages of the activated sludge method are fully utilized in the MBBR pool, which can be used for organic matter removal and also has the functions of nitrogen and phosphorus removal.

[0030] Furthermore, some anaerobic or facultative aerobic bacteria grow inside the MBBR pool, and aerobic bacteria grow outside. By returning the sludge in the MBBR pool to the anoxic pool, nitrification and denitrification reactions can exist at the same time, thereby improving the treatment effect.

[0031] The peroxide wastewater is highly toxic, resulting in a high sludge settling ratio of more than 70% (generally 20%-30%). The traditional secondary sedimentation tank has a high level of suspended solids in the effluent. The use of MBR mesoporous fiber membranes with a pore size of 0.1μm achieves the separation of macromolecular soluble substances and microbial flocs in the activated sludge. Under the separation and filtration of the membrane assembly, the MBR membrane has a good mud-water separation effect. The concentration of activated sludge in the MBR pool can be increased to 8000-10000mg / L, which greatly increases the biochemical reaction rate and improves the removal effect of difficult-to-degrade COD. In addition, the MBR membrane assembly can retain microorganisms such as slowly proliferating nitrifying bacteria in the reactor to ensure the nitrification effect of the system. In addition, the MBR membrane assembly can prolong the hydraulic retention time of difficult-to-degrade organic matter (especially macromolecular organic matter), which is conducive to the removal of such pollutants. The MBR membrane realizes mud-water separation, solving the problems of poor sludge settling ratio and excessive suspended solids. The MBBR pool is connected in series with the MBR pool, so the MBR effluent can be directly used as the nanofiltration inlet water in the COD separation device, which can meet the working requirements.

[0032] The nanofiltration membrane in the COD separation device is a membrane separation technology between ultrafiltration and reverse osmosis. It is particularly suitable for substances with a molecular size of more than 1nm, and can achieve selective separation between monovalent and multivalent salt ions and small molecular organic matter. This process has the advantages of good organic matter treatment effect and short process flow. The effluent water quality meets the A standard of Tianjin DB12 / 599-2015 "Pollutant Discharge Standard for Urban Wastewater Treatment Plants".

[0033] Through this process, the MBR pool has a COD retention rate of 20%, a total phosphorus retention rate of 35%, and a total nitrogen retention rate of 12%. The nanofiltration membrane has a COD retention rate of 75%, a total phosphorus retention rate of 82%, and a total nitrogen retention rate of 34%. It can be seen that the nanofiltration membrane plays a key role in the removal of biochemically refractory organic peroxides. The effluent COD is <15mg / L, which is far less than the indicator requirement of COD <30mg / L, ensuring that the water quality meets the discharge standards.

[0034] Finally, the adsorption device is equipped with activated coke to remove impurities such as free chlorine, odor, color, organic matter, heavy metals, etc.

[0035] Therefore, the production line has a good effect on the treatment of organic wastewater, and most of the bacteria in the present application can be produced internally without the need to add additional bacterial agents, so the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is the process flow chart of the organic peroxide wastewater treatment production line of the utility model;

[0037] In the figure:

[0038] 1. Regulating tank 2. Coagulation sedimentation tank 3. Hydrolysis acidification tank

[0039] 4. Anoxic pool 5. Aerobic pool 6. MBBR pool

[0040] 7. MBR pool 8. COD separation device 9. Adsorption device

[0041] 10. Branch pipe Ⅰ 11. Branch pipe Ⅳ 12. Branch pipe Ⅱ DETAILED DESCRIPTION

[0042] This embodiment 1:

[0043] Sewage enters the regulating tank 1 through the pipeline, and the sewage inlet indicators are as follows:

[0044] Influent COD≤400mg / L, the refractory COD in the influent COD is between 100-150mg / L, SS≤400mg / L, ammonia nitrogen≤10mg / L, TN is between 2-35mg / L, TP≤8mg / L, TDS≤8000mg / L, pH is 6-9, chromaticity≤64, the biodegradability of sewage is poor and the salt content is high, so how to treat this kind of sewage to achieve the discharge index is the top priority. Therefore, we designed a sewage treatment production line.

[0045] Therefore, we developed a production line for treating organic peroxide wastewater, which includes a regulating tank 1, a coagulation sedimentation tank 2, a hydrolysis acidification tank 3, an A / O tank, an MBBR tank 6, an MBR tank 7, a COD separation device 8, and a high-efficiency adsorption device 9;

[0046] The water outlet of the regulating tank 1 is connected to the water inlet of the coagulation sedimentation tank 2 through a pipeline, and the water outlet of the coagulation sedimentation tank 2 is connected to the water inlet of the hydrolysis acidification tank 3 through a pipeline; the A / O tank includes an anoxic tank 4 and an aerobic tank 5 in sequence, the water outlet of the hydrolysis acidification tank 3 is connected to the water inlet of the anoxic tank 4, the water outlet of the anoxic tank 4 is connected to the water inlet of the aerobic tank 5, and the water outlet of the aerobic tank 5 is connected to the water inlet of the MBBR tank 6, and the MBR tank 7 is divided into an MBR water The water outlet of the MBBR pool 6 is connected to the water inlet of the MBR water pool, an MBR membrane is arranged in the MBR water pool, the water outlet of the MBR water pool is connected to the water inlet of the water production pool through a pipeline, the water outlet of the water production pool is connected to the water inlet of the COD separation device 8 through an outlet pipe; the COD separation device 8 is provided with a drain and a concentrated water outlet, the drain is connected to the water inlet of the adsorption device 9 through a pipeline, and the concentrated water outlet is connected to the ozone catalysis device through a pipeline.

[0047] The coagulation sedimentation tank 2 and the regulating tank 1 are both provided with a dosing port;

[0048] The bottom of the coagulation sedimentation tank 2 is conical and is provided with a sludge discharge port, and the sludge in the coagulation sedimentation tank 2 is discharged to the sludge tank through a sludge discharge pump.

[0049] The hydrolysis acidification tank 3 is provided with a mud discharge port and a mud inlet, and the mud discharge port is connected to the sludge tank through a pipeline. The hydrolysis acidification tank 3 is provided with a water distribution system and a mud discharge system. The sludge area contains a high concentration of facultative microbial layer, and the sludge area is provided with a mud discharge port and a mud inlet.

[0050] The anoxic tank 4 is provided with a dosing port and a sludge return port, and an ORP meter is provided in the anoxic tank 4; an aeration device is provided in the aerobic tank 5; and a sludge return port is provided in the aerobic tank 5;

[0051] One end of the branch pipe I10 is connected to the mud outlet of the MBR water tank, and the other end is connected to the sludge return outlet of the anoxic tank 4 and the aerobic tank 5;

[0052] One end of the branch pipe IV11 is connected to the branch pipe I10 , and the other end is connected to the mud inlet of the hydrolysis acidification tank 3 .

[0053] An MBR membrane is arranged in the MBR water pool; the MBR membrane in the MBR water pool is a PVDF mesoporous fiber membrane, and the pore size of the MBR membrane is 0.1 μm.

[0054] There are two adsorption devices arranged in parallel between the COD separation device 8 and the stabilization tank. The COD separation device 8 is provided with a nanofiltration membrane and a dosing port. The clean water filtered by the COD separation device 8 enters the adsorption device 9.

[0055] The separation layer of the nanofiltration membrane is a 1 nm microporous structure.

[0056] The adsorption device 9 is provided with activated coke.

[0057] The drain outlet of the ozone catalytic device is connected to the water inlet of the regulating tank 1 through a pipeline; further, one end of the branch pipe II12 is connected to the pipeline between the COD separation device 8 and the ozone catalytic device, and a valve is provided on the branch pipe II12, and the other end of the branch pipe II12 is connected to the pipeline between the ozone catalytic device and the regulating tank 1.

[0058] The concentrated water enters the regulating tank 1 after being treated by the ozone catalytic device. Under the action of the catalyst, ozone stimulates the generation of hydroxyl radicals, and most of the refractory organic matter undergoes a chain breaking reaction to form short-chain organic matter, which is returned to the regulating tank 1 for further biochemical treatment. The regulating tank 1 is provided with a dosing port, and a reducing agent is added to the regulating tank 1 through the dosing port, wherein the reducing agent is sodium sulfite or sodium bisulfite or other, preferably sodium sulfite. The sewage homogenized in the regulating tank 1 enters the coagulation sedimentation tank 2 through a pipeline, and PAC and PAM are added to the coagulation sedimentation tank 2 through the dosing port for phosphorus removal. The phosphorus removal results of the precipitation process are as follows:

[0059] Furthermore, the pipeline is provided with a valve and a pump.

[0060] Table 1 Controlled effluent index of coagulation sedimentation tank 2

[0061]

[0062] By adding PAC to the coagulation sedimentation tank 2, Al 3+ It forms phosphate precipitate with soluble orthophosphate, and Al 3+ The formed multi-nuclear hydroxyl complex and aluminum hydroxide precipitate can also adsorb a portion of phosphorus, thereby achieving a stable phosphorus removal effect.

[0063] The sewage treated by the coagulation sedimentation tank 2 enters the hydrolysis acidification tank 3 through the water outlet, the pipeline, and the water inlet of the hydrolysis acidification tank 3. The sludge area is provided with a sludge discharge port and a sludge inlet;

[0064] The hydrolysis acidification tank 3 is provided with a water distribution system and a sludge discharge system. By controlling the aeration device, the dissolved oxygen in the hydrolysis acidification tank 3 is ≤0.2-0.3 mg / L and is in an anoxic state. The ORP value is controlled to be between -400mv and -100mv.

[0065] The treated sewage enters the anoxic tank 4 and the aerobic tank 5 in the A / O tank in turn. The outlet of the hydrolysis acidification tank 3 is connected to the inlet of the anoxic tank 4. The sewage treated by the anoxic tank 4 is connected to the inlet of the aerobic tank 5 through the outlet and enters the aerobic tank 5 for further treatment. The anoxic tank 4 is provided with a dosing port, and NaHCO is added to the anoxic tank 4 through the dosing port. 3、 Glucose, and control the following indicators:

[0066] Table 2 Pool effluent control indicators

[0067]

[0068] The water treated in the aerobic pool 5 enters the MBBR pool 6 through the outlet, the pipeline, and the water inlet of the MBBR pool 6 for treatment and then enters the MBR water pool. The MBR pool 7 is provided with a dosing port, and the MBR water pool is provided with an MBR membrane. The peroxide wastewater is highly toxic, resulting in a high sludge settling ratio, reaching more than 70% (generally 20%-30%), and the traditional secondary sedimentation tank effluent has a high suspended solids content. A PVDF mesoporous fiber membrane with a pore size of 0.1 μm is used. The separation of macromolecular soluble substances and microbial flocs in the activated sludge is achieved. Under the separation and filtration of the membrane assembly, the mud-water separation effect of the MBR pool 7 is good, and the effluent can be directly used as the inlet of the nanofiltration process.

[0069] Furthermore, the concentration of activated sludge in the MBR membrane bioreactor system can be increased to 8000-10000 mg / L, which greatly increases the biochemical reaction rate and improves the removal effect of difficult-to-degrade COD.

[0070] Table 3 Indexes before and after MBR membrane filtration

[0071]

[0072]

[0073] The water filtered by the MBR water tank enters the water production tank, and then enters the COD separation device 8 for further treatment. One end of the branch pipe I10 is connected to the mud outlet of the MBR water tank, and the other end is connected to the sludge return port of the anoxic tank 4 and the aerobic tank 5; one end of the branch pipe IV11 is connected to the branch pipe I10, and the other end is connected to the mud inlet of the hydrolysis acidification tank 3. Therefore, part of the filtered sludge enters the aerobic tank 5 and the anoxic tank 4, and the remaining sludge enters the hydrolysis acidification tank 3 for further treatment. Finally, the sludge treated by the hydrolysis acidification tank 3 is discharged from the mud outlet to the sludge tank;

[0074] The COD separation device 8 is provided with a nanofiltration membrane, and the COD separation device 8 is provided with a dosing port, a drain port and a concentrated water port. Non-oxidizing bactericides, reducing agents, scale inhibitors, and chemical cleaning agents such as sodium hydroxide are added to the COD separation device 8 through the dosing port. The nanofiltration membrane is a membrane separation technology between ultrafiltration and reverse osmosis. The separation layer of the COD separation membrane has a microporous structure of about 1nm. The COD separation membrane has a molecular weight cutoff between the reverse osmosis membrane and the ultrafiltration membrane, and is particularly suitable for substances with a molecular size of more than 1nm. The COD separation device 8 is used to separate organic matter and some inorganic salts with a relatively small molecular weight from the solvent, and the separation performance is between reverse osmosis and ultrafiltration. It can achieve selective separation between monovalent and multivalent salt ions and small molecular organic matter. This process has the advantages of good organic matter treatment effect and short process flow. The effluent water quality meets the A standard of Tianjin DB12 / 599-2015 "Pollutant Discharge Standard for Urban Sewage Treatment Plants". The effluent is discharged to the artificial wetland through the stabilization tank.

[0075] Table 4 Water inlet index before and after nanofiltration membrane:

[0076]

[0077] The results of the nanofiltration membrane filtration system are as follows:

[0078] Table 5 Nanofiltration membrane filtration treatment results

[0079]

[0080] From the above results, the MBR membrane has a COD retention rate of 20%, a total phosphorus retention rate of 35%, and a total nitrogen retention rate of 12%. The nanofiltration membrane has a COD retention rate of 75%, a total phosphorus retention rate of 82%, and a total nitrogen retention rate of 34%. It can be seen that the nanofiltration membrane plays a key role in the removal of biochemically refractory organic peroxides. The effluent COD is <15mg / L, which is far less than the indicator requirement of COD <30mg / L, ensuring that the water quality meets the discharge standards.

[0081] The clean water treated by the COD separation device 8 meets the discharge standard after high-efficiency adsorption, and the concentrated water enters the regulating tank 1 for further treatment.

[0082] The sewage is treated by this system. The device has been running stably for two years, and the effluent water quality meets the discharge standard without exceeding the standard. Coagulation sedimentation tank 2 is equipped with online ORP monitoring to control the ORP value between 100-400mv, ensuring the normal operation of the biochemical system. The effluent of MBR pool 7 meets the design standards, the effluent COD is between 20-50mg / L, and the suspended solids are basically 0mg / L. The effluent can be directly used as nanofiltration water. The nanofiltration effluent meets the design standards and the effluent water quality standards, with suspended solids of 0mg / L, total nitrogen ≤5.0mg / L, and COD between 6-14mg / L (≤30mg / L). When the nanofiltration separation meets the effluent standards, it can be directly discharged through the stabilization tank without activated coke adsorption.

[0083] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A production line for treating organic peroxide wastewater, characterized in that: It includes regulating tank, coagulation sedimentation tank, hydrolysis acidification tank, A / O tank, MBBR tank, MBR tank, COD separation device and adsorption device in sequence; The water outlet of the regulating tank is connected to the water inlet of the coagulation sedimentation tank through a pipeline, and the water outlet of the coagulation sedimentation tank is connected to the water inlet of the hydrolysis acidification tank through a pipeline; the A / O tank includes an anoxic tank and an aerobic tank in sequence, the water outlet of the hydrolysis acidification tank is connected to the water inlet of the anoxic tank, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank, the water outlet of the aerobic tank is connected to the water inlet of the MBBR tank, the MBR tank is divided into an MBR water tank and a water production tank, the water outlet of the MBBR tank is connected to the water inlet of the MBR water tank, the MBR water tank is provided with an MBR membrane, the water outlet of the MBR water tank is connected to the water inlet of the water production tank through a pipeline, and the water outlet of the water production tank is connected to the water inlet of the COD separation device through a water outlet pipe; The COD separation device is provided with a drain port and a concentrated water port. The drain port is connected to the water inlet of the adsorption device through a pipeline, and the concentrated water port is connected to the ozone catalytic device through a pipeline.

2. A production line for treating organic peroxide wastewater according to claim 1, characterized in that: A water collecting tank is provided at the front end of the regulating tank; a drug adding port is provided in the regulating tank; The bottom of the coagulation sedimentation tank is conical and is provided with a sludge discharge port, and the sludge in the coagulation sedimentation tank is discharged to the sludge pool through a sludge discharge pump.

3. A production line for treating organic peroxide wastewater according to claim 2, characterized in that: The hydrolysis acidification tank is provided with a mud discharge port and a mud inlet, the mud discharge port is connected to the sludge tank through a pipeline, a water distribution system and a mud discharge system are provided in the hydrolysis acidification tank, the hydrolysis acidification tank is divided into a sludge area, a transition area and a clear water area in sequence, the sludge area contains a facultative microbial layer, and the sludge area is provided with a mud discharge port and a mud inlet.

4. A production line for treating organic peroxide wastewater according to any one of claims 1 to 3, characterized in that: The anoxic tank is provided with a dosing port and a sludge return port, and an ORP meter is provided in the anoxic tank; an aeration device is provided in the aerobic tank; and a sludge return port is provided in the aerobic tank; One end of the branch pipe I is connected to the mud outlet of the MBR water tank, and the other end is connected to the sludge return outlet of the anoxic tank and the aerobic tank; One end of the branch pipe IV is connected to the branch pipe I, and the other end is connected to the mud inlet of the hydrolysis acidification tank.

5. A production line for treating organic peroxide wastewater according to claim 4, characterized in that: An MBR membrane is arranged in the MBR water pool; the MBR membrane in the MBR water pool is a PVDF mesoporous fiber membrane, and the pore size of the MBR membrane is 0.1 μm.

6. A production line for treating organic peroxide wastewater according to claim 5, characterized in that: There are two adsorption devices arranged in parallel between the COD separation device and the stabilization tank. The COD separation device is provided with a nanofiltration membrane and a dosing port. The clean water filtered by the COD separation device enters the adsorption device. The separation layer of the nanofiltration membrane is a 1 nm microporous structure.

7. A production line for treating organic peroxide wastewater according to claim 1 or 2 or 3 or 5 or 6, characterized in that: Active coke is arranged in the adsorption device.

8. A production line for treating organic peroxide wastewater according to claim 7, characterized in that: The drain outlet of the ozone catalytic device is connected to the water inlet of the regulating tank through a pipeline; one end of the branch pipe II is connected to the pipeline between the COD separation device and the ozone catalytic device, and a valve is provided on the branch pipe II, and the other end of the branch pipe II is connected to the pipeline between the ozone catalytic device and the regulating tank.

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