Phenolic wastewater treatment device

Abstract

The utility model provides a phenolic wastewater treatment device, which relates to the technical field of sewage treatment and comprises a pretreatment system and a comprehensive treatment system which are connected with each other, the pretreatment system comprises an electro-catalysis device, a coagulative precipitation device A, a filter press and a coagulative precipitation device B which are connected in sequence, the coagulative precipitation device A is provided with a CaO and FeSO4 dosing device, the coagulative precipitation device B is provided with a PAC and PAM dosing device, the coagulative precipitation device B is connected with a sludge tank, and the sludge tank is further connected with the filter press; the comprehensive treatment system comprises a hydrolysis acidification pool, a first-stage aerobic treatment system and integrated biochemical equipment which are connected in sequence; the hydrolysis acidification pool, the first-stage aerobic treatment system and the integrated biochemical equipment are respectively connected with the sludge pool; and the coagulating sedimentation device B is connected with the hydrolysis acidification pool. According to the utility model, COD (Chemical Oxygen Demand), SS (Suspended Solid), ammonia nitrogen, total nitrogen and the like in the phenol-containing wastewater can be effectively removed through the pretreatment system, the comprehensive treatment system and sludge dewatering, so that the phenol-containing wastewater can be discharged up to the standard.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a treatment device for phenol-containing wastewater. Background Art

[0002] Root inhibitor (APR product, the main component is phenolic organic matter) is an essential additive for chemical root inhibition of waterproof materials, and is mainly used in the production of waterproof membranes and waterproof coatings with root inhibition requirements. During its production process, the production equipment will be cleaned, and the COD of the cleaning wastewater is high and cannot be discharged directly, so the cleaning wastewater needs to be treated.

[0003] Existing treatment devices have the disadvantages of complex equipment operation, low pollutant removal rate, and easy generation of secondary pollution. Utility Model Content

[0004] In view of the above problems, the utility model provides a treatment device for phenol-containing wastewater. Through a pretreatment system, a comprehensive treatment system and a sludge dewatering system, COD, SS, ammonia nitrogen, total nitrogen, etc. in the phenol-containing wastewater can be effectively removed, so that the phenol-containing wastewater can be discharged in compliance with the standards without secondary pollution, meeting production and environmental protection requirements, reducing treatment costs, and improving the operating stability of the sewage treatment system.

[0005] To achieve the above purpose, the technical solution of the utility model is implemented as follows:

[0006] A device for treating phenol-containing wastewater comprises: a pretreatment system and a comprehensive treatment system connected to each other;

[0007] The pretreatment system comprises an electrocatalytic device, a coagulation and sedimentation device A, a filter press and a coagulation and sedimentation device B which are connected in sequence, wherein the coagulation and sedimentation device A is provided with a CaO and FeSO4 dosing device, the coagulation and sedimentation device B is provided with a PAC and PAM dosing device, the coagulation and sedimentation device B is connected to a sludge tank, and the sludge tank is also connected to the filter press;

[0008] The comprehensive treatment system comprises a hydrolysis acidification tank, a primary aerobic treatment system, and an integrated biochemical device connected in sequence, wherein the hydrolysis acidification tank, the primary aerobic treatment system, and the integrated biochemical device are respectively connected to the sludge tank;

[0009] The coagulation and sedimentation device B is connected to the hydrolysis and acidification tank;

[0010] The coagulation and sedimentation device A precipitates suspended matter and insoluble macromolecular COD in the phenol-containing wastewater, the filter press removes the precipitate in the phenol-containing wastewater, the coagulation and sedimentation device B further precipitates suspended matter and organic matter in the phenol-containing wastewater and discharges the precipitate, the hydrolysis and acidification tank precipitates the remaining suspended matter and part of the organic matter in the phenol-containing wastewater and breaks down the macromolecular organic matter, the primary aerobic treatment system degrades COD and ammonia nitrogen in the wastewater, and the integrated biochemical equipment removes part of the COD and ammonia nitrogen in the phenol-containing wastewater.

[0011] As a further improvement of the utility model, a sewage lifting pump is provided on the pipeline between the coagulation and sedimentation device B and the hydrolysis and acidification tank.

[0012] As a further improvement of the utility model, the pretreatment system also includes a production wastewater regulating tank, which is connected to the phenol-containing wastewater and is connected to the electrocatalytic device.

[0013] As a further improvement of the utility model, the electrocatalytic device comprises a reaction tank, an alloy steel oxide electrode plate and a dosing system;

[0014] The dosing system comprises an alkali dosing device, an acid dosing device and a H2O2 dosing device.

[0015] As a further improvement of the utility model, a comprehensive regulating tank is also provided between the coagulation and sedimentation device B and the hydrolysis and acidification tank;

[0016] The coagulation and sedimentation device B is connected to the comprehensive regulating tank via a sewage lifting pump, and the sewage in the comprehensive regulating tank flows into the hydrolysis acidification tank through a pipeline.

[0017] As a further improvement of the present invention, a clear water tank is further provided between the coagulation and sedimentation device B and the comprehensive regulating tank. The clear water tank temporarily stores the supernatant discharged from the coagulation and sedimentation device B and is connected to the comprehensive regulating tank via a sewage lifting pump.

[0018] As a further improvement of the utility model, an intermediate water tank is provided between the filter press and the coagulation sedimentation device B;

[0019] The water discharged from the filter press is discharged to the intermediate water tank through a pipeline. The intermediate water tank temporarily stores the waste water discharged from the filter press and is connected to the coagulation and sedimentation device B through a water inlet lift pump.

[0020] As a further improvement of the present invention, the primary aerobic treatment system includes high-load activated sludge and is provided with a deodorization and sludge return system. The sludge return system includes a sludge return pump, through which the high-load activated sludge is returned and the sludge is discharged into the sludge pool.

[0021] As a further improvement of the present invention, the integrated biochemical equipment includes a coagulation zone, a horizontal flow sedimentation zone, a biochemical zone, and a deep sedimentation zone which are arranged in sequence.

[0022] As a further improvement of the utility model, the integrated biochemical equipment is connected to an activated carbon filter to filter SS and chromaticity in the treated phenol-containing wastewater and then discharge it.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model sets a coagulation sedimentation device A and a coagulation sedimentation device B, respectively adds FeSO4, CaO and PAC, PAM to precipitate and remove insoluble macromolecular COD, suspended matter and organic matter in phenol-containing wastewater, and after two-stage treatment, the removal rate of insoluble macromolecular COD in phenol-containing wastewater can reach about 80%, and the removal rate of SS can reach about 90%, and the removal rate is relatively high; a hydrolysis acidification tank is then set to intercept suspended matter, remove part of organic matter, break down macromolecular organic matter, improve the biodegradability of sewage, and promote the conversion of organic nitrogen into ammonia nitrogen in the phenol-containing wastewater; a primary aerobic treatment system is further used to utilize aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in the wastewater, and finally, through integrated biochemical equipment, part of pollutants such as COD and ammonia nitrogen are removed to achieve discharge of effluent meeting the standards. The utility model involves simple equipment and high pollutant removal rate.

[0025] The utility model arranges a filter press between the coagulation sedimentation device A and the coagulation sedimentation device B to remove the sludge first, which can greatly save the amount of PAC and PAM added in the coagulation sedimentation device B, avoid the waste of PAC and PAM, and improve the utilization rate of PAC and PAM.

[0026] The utility model connects a sludge pool with a filter press to filter the mud-water mixture in the sludge pool. Since the mud-water mixture in the sludge pool still contains pollutants, it cannot be directly discharged and still needs to be treated. The mud cake after the water is filtered by the filter press can ensure that the water content is 60%, thereby reducing the residual amount of pollutants in the mud cake as much as possible, improving the treatment rate of high-concentration organic coating wastewater, reducing the amount of mud cake that needs to be treated, and reducing pollution to the environment.

[0027] The utility model can make the wastewater homogenized and equalized in the production wastewater regulating tank and the comprehensive regulating tank before pretreatment and comprehensive treatment by setting the production wastewater regulating tank and the comprehensive regulating tank, that is, make the dispersed substances such as macromolecular COD and SS in the wastewater uniform, save the dosage of drugs in subsequent wastewater treatment, save the dosage of FeSO4, CaOH, PAC, PAM, and the dosage in the decomposition acidification tank, and save the wastewater treatment cost.

[0028] The various devices and systems adopted in the utility model can realize the use of the electrocatalytic device, coagulation sedimentation and comprehensive treatment alone or in combination under suitable conditions, and have the advantages of convenient operation, stable water output and low operating cost.

[0029] The hydrolysis acidification tank of the utility model is an upflow hydrolysis acidification tank, and the water enters the tank from bottom to top. The tank is provided with a composite filler, which is convenient for microorganisms to attach and grow, and is beneficial to improving the treatment efficiency of the hydrolysis acidification tank for phenol-containing wastewater.

[0030] The utility model adopts a high-load activated sludge method to utilize aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in wastewater, thereby greatly improving the removal efficiency of COD and ammonia nitrogen in phenol-containing wastewater.

[0031] The utility model integrated biochemical equipment integrates the advantages of UASB, high-efficiency biological filter, biological fluidized bed and contact oxidation tank, introduces immobilized special high-efficiency microorganisms, has strong impact load resistance, and has significant advantages for difficult-to-degrade wastewater and high ammonia nitrogen wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a treatment device for phenol-containing wastewater according to an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of a hydrolysis acidification tank and a primary aerobic treatment system according to an embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of an integrated biochemical device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0039] like Figure 1 As shown, the utility model provides a phenol-containing wastewater treatment device, comprising: a pretreatment system and a comprehensive treatment system connected to each other;

[0040] The pretreatment system includes an electrocatalytic device, a coagulation and sedimentation device A, a filter press, an intermediate water tank and a coagulation and sedimentation device B which are connected in sequence by pipelines. Valves are provided on the connecting pipelines. The coagulation and sedimentation device A is preferably a coagulation tank. The coagulation and sedimentation device A is provided with a CaO and FeSO4 dosing device for adding coagulation and demulsifier CaO and FeSO4. A stirrer is placed in the coagulation and sedimentation device A. The phenol-containing wastewater is passed through the coagulation and sedimentation device A to remove suspended matter and insoluble large molecular COD in the wastewater, and demulsification is performed at the same time. The mud-water mixture after the precipitation reaction enters a filter press, preferably a plate-frame filter press, and then is filtered through the filter press to obtain mud cake and filter press water, and the filter press water enters the intermediate water tank; the filter press water in the intermediate water tank is input into the coagulation sedimentation device B through a sewage lift pump, and the coagulation sedimentation device B is preferably a coagulation tank. The coagulation sedimentation device B is provided with a PAC and PAM dosing device for adding coagulants PAC and PAM. At the same time, the pH in the coagulation sedimentation device B is adjusted according to the water quality to further remove suspended matter and organic matter in the phenol-containing wastewater. The coagulation sedimentation device B is connected to a sludge tank, and the precipitated sludge enters the sludge tank. The sludge tank is also connected to a filter press. The same filter press filters the sludge to obtain mud cake and filter press water, and the filter press water enters the intermediate water tank; the supernatant after precipitation enters the comprehensive treatment system, and the phenol-containing wastewater treated by the pretreatment system can remove about 80% of COD and about 90% of SS, thereby reducing the back-end biochemical treatment load;

[0041] The comprehensive treatment system includes a comprehensive regulating tank, a hydrolysis acidification tank, a primary aerobic treatment system, and an integrated biochemical equipment which are connected in sequence by pipelines. The connecting pipelines are provided with lifting pumps, pipes, and valves. The hydrolysis acidification tank, the primary aerobic treatment system, and the integrated biochemical equipment are respectively connected to the sludge tank; the coagulation sedimentation device B is connected to the hydrolysis acidification tank via the comprehensive regulating tank; the supernatant in the coagulation sedimentation device B is input into the comprehensive regulating tank via the sewage lifting pump, and the water quantity and water quality are adjusted and homogenized in the comprehensive regulating tank before being input into the hydrolysis acidification tank. In the hydrolysis acidification tank, the suspended solids in the wastewater are cut off, and some organic matter is removed, macromolecular organic matter is broken down, the biodegradability of the sewage is improved, and the conversion of organic nitrogen into ammonia nitrogen is promoted, and the wastewater is released. The suspended solids and organic matter are discharged into the sludge pool, and the remaining phenol-containing wastewater is discharged into the primary aerobic treatment system. The primary aerobic treatment system uses aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in the phenol-containing wastewater; the treated phenol-containing wastewater enters the integrated biochemical equipment, and the pollutants in the wastewater are further removed through the metabolism of microorganisms in the integrated reactor. The effluent COD can be reduced to less than 300 mg / L, and the ammonia nitrogen is reduced to less than 30 mg / L. The effluent enters the activated carbon filter; the activated carbon filter further removes SS, chromaticity and COD in the effluent of the integrated biochemical equipment to obtain effluent. After the effluent water quality meets the standard, it enters the clear water tank for temporary storage and then is discharged into the municipal sewage network.

[0042] The sludge in the sludge pool and the sludge discharged from the integrated biochemical equipment are dehydrated by the plate and frame filter press, and the resulting mud cake is transported out for treatment, and the sludge moisture content is reduced to about 60%.

[0043] in,

[0044] The electrocatalytic device includes a reaction tank, an alloy steel oxide electrode plate and a dosing system; the dosing system includes an alkali dosing device, an acid dosing device and an H2O2 dosing device. The phenol-containing wastewater is treated by the electrocatalytic device to oxidize and degrade the organic matter with stable structure, open the ring structure, break the bonds of the macromolecules with long chain structure, dehalogenate the halogenated organic matter, eliminate the biological toxicity, demulsify and degel the emulsified and colloidal wastewater, improve the biodegradability of the wastewater, and reduce the COD concentration at the same time. The treated effluent enters the coagulation and sedimentation reaction device A;

[0045] Agitators are placed in the coagulation and sedimentation device A and the coagulation and sedimentation device B. The agitator in the coagulation and sedimentation device A accelerates the mixing of the phenol-containing wastewater with the added FeSO4 and CaO reagents to remove suspended matter and insoluble large molecular COD in the wastewater and demulsifies at the same time. The agitator in the coagulation and sedimentation device B accelerates the mixing of the phenol-containing wastewater with the added PAC and PAM reagents to remove suspended matter and organic matter in the wastewater and form precipitation.

[0046] The hydrolysis acidification tank is an upflow hydrolysis acidification tank. The water enters the tank from bottom to top (i.e., flows upward from the bottom of the tank). Composite fillers are arranged in the tank. Water flows through the fillers and comes into contact with anaerobic microorganisms, which facilitates the attachment and growth of microorganisms. At the same time, in the hydrolysis acidification tank, suspended solids are intercepted, some organic matter is removed, large molecular organic matter is broken down, the biodegradability of sewage is improved, and the conversion of organic nitrogen into ammonia nitrogen is promoted.

[0047] The primary aerobic treatment system adopts a high-load activated sludge method, using aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in the wastewater. The dissolved oxygen is controlled at 2-4 mg / L and the pH is controlled at 7.5-8.5. The high-load activated sludge concentration is controlled at 2000-4000 mg / L. The effluent from the primary aerobic treatment system enters the vertical flow sedimentation tank for mud-water separation. Part of the sludge is returned to the hydrolysis acidification tank and the front end of the aerobic treatment system, and part of the remaining sludge is discharged from the primary aerobic treatment system into the sludge tank.

[0048] The primary aerobic treatment system is equipped with a deodorization and sludge return system. The remaining sludge is regularly discharged into the sludge pool through a pump. The sludge return pump is shared with the remaining sludge discharge pump, and the effluent enters the integrated biochemical device.

[0049] The integrated biochemical device includes a coagulation zone, a horizontal sedimentation zone, a biochemical zone, and a deep treatment zone. Through the metabolism of microorganisms in the integrated reactor, pollutants in the wastewater are further removed, and the effluent COD can be reduced to less than 300 mg / L, and ammonia nitrogen to less than 30 mg / L. The effluent enters the activated carbon filtration system.

[0050] Furthermore,

[0051] A clear water tank is also provided between the coagulation and sedimentation device B and the comprehensive regulating tank. The clear water tank temporarily stores the supernatant discharged from the coagulation and sedimentation device B and is connected to the comprehensive regulating tank through a sewage lifting pump.

[0052] The integrated biochemical equipment combines the advantages of UASB, high-efficiency biofilter, biological fluidized bed and contact oxidation tank. The biochemical tank is filled with macroporous mesh elastic carriers and weighted lightweight fillers, and immobilized special high-efficiency microorganisms are introduced. It has strong impact load resistance and has significant advantages for difficult-to-degrade phenol-containing wastewater and high-ammonia nitrogen wastewater. The integrated biochemical equipment is equipped with an aeration system and is connected to a Roots blower or a rotary blower.

[0053] The activated carbon filter in the utility model is connected to a filter water inlet pump and a backwash water pump.

[0054] Each dosing device in the utility model comprises a drug dissolving tank, a stirrer and a dosing metering pump.

[0055] like Figure 2 As shown, the phenol-containing wastewater in the comprehensive regulating tank enters the hydrolysis reaction tank through the water inlet pipe, the hydrolysis reaction tank is connected to the aeration tank of the primary aerobic treatment system, the aeration tank is connected to the vertical flow sedimentation tank, and the phenol-containing wastewater treated by the primary aerobic treatment system is discharged from the outlet pipe of the vertical flow sedimentation tank into the integrated biochemical equipment; wherein, the aeration tank is provided with an aeration device, the aeration device includes an aeration pipe and a blower, the blower is powered on and runs, air is input into the aeration pipe, and the aeration pipe releases the air into the phenol-containing wastewater solution.

[0056] like Figure 3 As shown, the phenol-containing wastewater discharged from the primary aerobic treatment system enters the buffer tank of the integrated biochemical equipment from the water inlet, and enters the horizontal flow sedimentation area through the flow hole. The pool wall where each biochemical pool is connected is provided with an upper opening or a lower opening. The phenol-containing wastewater enters each biochemical pool in turn through the upper opening or the lower opening, and finally reaches the deep treatment area. The phenol-containing wastewater after deep treatment is discharged from the water outlet. At the same time, each biochemical pool and the deep sedimentation area are provided with a sludge discharge outlet to discharge the sludge obtained by biochemical precipitation into the sludge pool.

[0057] Example:

[0058] like Figure 1 As shown, the utility model provides a device for treating phenol-containing wastewater, and the process flow includes:

[0059] Step 1, the phenol-containing wastewater is homogenized and weighed in the production wastewater regulating tank and then enters the electrocatalytic device;

[0060] Step 2: After the electrocatalytic treatment, the phenol-containing wastewater enters the coagulation and precipitation system for coagulation and precipitation reaction, and the coagulation and demulsifier FeSO4 and CaO are added to the coagulation tank 1# to mainly demulsify the phenol-containing wastewater and remove the suspended matter and insoluble macromolecular COD in the phenol-containing wastewater;

[0061] Step 3: The mud-water mixture after the coagulation and sedimentation reaction enters the sludge tank, and then is filtered through a membrane filter press, and the filtered water enters the intermediate water tank;

[0062] Step 4: The phenol-containing wastewater in the intermediate water tank is pumped into coagulation tank 2#, and coagulants PAC and PAM are added to further remove suspended solids and organic matter in the wastewater;

[0063] Step 5: The precipitated sludge enters the sludge tank, and the supernatant enters the clear water tank. The treated wastewater in the clear water tank is regularly pumped to the comprehensive treatment station for further treatment, and is discharged into the municipal sewage network after the water quality meets the standards;

[0064] Step 6: After the sludge in the sludge pool is dehydrated by a filter press, the generated sludge is transported out for treatment;

[0065] Step 7: Domestic sewage, initial rainwater and pre-treated effluent first enter the comprehensive regulating pool for water quantity and quality regulation and homogenization, and set up a pre-aeration system to prevent the danger of anaerobic methane production, balance water quality and quantity, and facilitate the back-end biochemical treatment;

[0066] Step 8: The effluent enters the hydrolysis acidification tank to intercept suspended solids, remove some organic matter, break down large molecular organic matter, improve the biodegradability of sewage, and promote the conversion of organic nitrogen into ammonia nitrogen.

[0067] Step 9: The effluent from the hydrolysis and acidification tank enters the primary aerobic treatment system. The primary aerobic tank adopts a high-load activated sludge method, using aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in the wastewater. The dissolved oxygen is controlled at 2-4 mg / L and the pH is controlled at 7.5-8.5. It is equipped with a deodorization and sludge return system, and the remaining sludge is regularly discharged into the sludge tank through a pump.

[0068] Step 10: The effluent from the primary aerobic treatment system flows by gravity into the integrated biochemical equipment to remove some pollutants such as COD and ammonia nitrogen. The effluent meets the discharge standards, and the remaining sludge is regularly discharged into the sludge pool through a pump.

[0069] Step 11: The effluent from the integrated biochemical equipment is further removed from SS and chroma by an activated carbon adsorber, and then enters a clear water tank for temporary storage before being discharged.

[0070] Advantages of the utility model:

[0071] The utility model sets a coagulation sedimentation device A and a coagulation sedimentation device B, respectively adds FeSO4, CaO and PAC, PAM to precipitate and remove insoluble macromolecular COD, suspended matter and organic matter in phenol-containing wastewater, and after two-stage treatment, the removal rate of insoluble macromolecular COD in phenol-containing wastewater can reach about 80%, and the removal rate of SS can reach about 90%, and the removal rate is relatively high; a hydrolysis acidification tank is then set to intercept suspended matter, remove part of organic matter, break down macromolecular organic matter, improve the biodegradability of sewage, and promote the conversion of organic nitrogen into ammonia nitrogen in the phenol-containing wastewater; a primary aerobic treatment system is further used to utilize aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in the wastewater, and finally, through integrated biochemical equipment, part of pollutants such as COD and ammonia nitrogen are removed to achieve discharge of effluent meeting the standards. The utility model involves simple equipment and high pollutant removal rate.

[0072] The utility model arranges a filter press between the coagulation sedimentation device A and the coagulation sedimentation device B to remove the sludge first, which can greatly save the amount of PAC and PAM added in the coagulation sedimentation device B, avoid the waste of PAC and PAM, and improve the utilization rate of PAC and PAM.

[0073] The utility model connects a sludge pool with a filter press to filter the mud-water mixture in the sludge pool. Since the mud-water mixture in the sludge pool still contains pollutants, it cannot be directly discharged and still needs to be treated. The mud cake after the water is filtered by the filter press can ensure that the water content is 60%, thereby reducing the residual amount of pollutants in the mud cake as much as possible, improving the treatment rate of high-concentration organic coating wastewater, reducing the amount of mud cake that needs to be treated, and reducing pollution to the environment.

[0074] The utility model can make the wastewater homogenized and equalized in the production wastewater regulating tank and the comprehensive regulating tank before pretreatment and comprehensive treatment by setting the production wastewater regulating tank and the comprehensive regulating tank, that is, make the dispersed substances such as macromolecular COD and SS in the wastewater uniform, save the dosage of drugs in subsequent wastewater treatment, save the dosage of FeSO4, CaOH, PAC, PAM, and the dosage in the decomposition acidification tank, and save the wastewater treatment cost.

[0075] The various devices and systems adopted in the utility model can realize the use of the electrocatalytic device, coagulation sedimentation and comprehensive treatment alone or in combination under suitable conditions, and have the advantages of convenient operation, stable water output and low operating cost.

[0076] The hydrolysis acidification tank of the utility model is an upflow hydrolysis acidification tank, and the water enters the tank from bottom to top. The tank is provided with a composite filler, which is convenient for microorganisms to attach and grow, and is beneficial to improving the treatment efficiency of the hydrolysis acidification tank for phenol-containing wastewater.

[0077] The utility model adopts a high-load activated sludge method to utilize aerobic microorganisms to degrade pollutants such as COD and ammonia nitrogen in wastewater, thereby greatly improving the removal efficiency of COD and ammonia nitrogen in phenol-containing wastewater.

[0078] The utility model integrated biochemical equipment integrates the advantages of UASB, high-efficiency biological filter, biological fluidized bed and contact oxidation tank, introduces immobilized special high-efficiency microorganisms, has strong impact load resistance, and has significant advantages for difficult-to-degrade wastewater and high ammonia nitrogen wastewater.

[0079] The above are only preferred embodiments of the present invention and do not limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A treatment device for phenol-containing wastewater, characterized in that: include: Connected pre-treatment system and integrated treatment system; The pretreatment system comprises an electrocatalytic device, a coagulation and sedimentation device A, a filter press and a coagulation and sedimentation device B which are connected in sequence, wherein the coagulation and sedimentation device A is provided with a CaO and FeSO4 dosing device, the coagulation and sedimentation device B is provided with a PAC and PAM dosing device, the coagulation and sedimentation device B is connected to a sludge tank, and the sludge tank is also connected to the filter press; The comprehensive treatment system comprises a hydrolysis acidification tank, a primary aerobic treatment system, and an integrated biochemical device connected in sequence, wherein the hydrolysis acidification tank, the primary aerobic treatment system, and the integrated biochemical device are respectively connected to the sludge tank; The coagulation and sedimentation device B is connected to the hydrolysis and acidification tank; The coagulation and sedimentation device A precipitates suspended matter and insoluble macromolecular COD in the phenol-containing wastewater, the filter press removes the precipitate in the phenol-containing wastewater, the coagulation and sedimentation device B further precipitates suspended matter and organic matter in the phenol-containing wastewater and discharges the precipitate, the hydrolysis and acidification tank precipitates the remaining suspended matter and part of the organic matter in the phenol-containing wastewater and breaks down the macromolecular organic matter, the primary aerobic treatment system degrades COD and ammonia nitrogen in the wastewater, and the integrated biochemical equipment removes part of the COD and ammonia nitrogen in the phenol-containing wastewater.

2. The device for treating phenol-containing wastewater according to claim 1, characterized in that: A sewage lifting pump is provided on the pipeline between the coagulation and sedimentation device B and the hydrolysis and acidification tank.

3. The device for treating phenol-containing wastewater according to claim 1, characterized in that: The pretreatment system also includes a production wastewater regulating tank, which is connected to the phenol-containing wastewater and the electrocatalytic device.

4. The device for treating phenol-containing wastewater according to claim 1, characterized in that: The electrocatalytic device comprises a reaction tank, an alloy steel oxide electrode plate and a dosing system; The dosing system comprises an alkali dosing device, an acid dosing device and a H2O2 dosing device.

5. The device for treating phenol-containing wastewater according to claim 1, characterized in that: A comprehensive regulating tank is also provided between the coagulation and sedimentation device B and the hydrolysis and acidification tank; The coagulation and sedimentation device B is connected to the comprehensive regulating tank via a sewage lifting pump, and the sewage in the comprehensive regulating tank flows into the hydrolysis acidification tank through a pipeline.

6. The device for treating phenol-containing wastewater according to claim 5, characterized in that: A clear water tank is also provided between the coagulation and sedimentation device B and the comprehensive regulating tank. The clear water tank temporarily stores the supernatant discharged from the coagulation and sedimentation device B and is connected to the comprehensive regulating tank via a sewage lifting pump.

7. The device for treating phenol-containing wastewater according to claim 1, characterized in that: An intermediate water tank is provided between the filter press and the coagulation sedimentation device B; The water discharged from the filter press is discharged to the intermediate water tank through a pipeline. The intermediate water tank temporarily stores the waste water discharged from the filter press and is connected to the coagulation and sedimentation device B through a water inlet lift pump.

8. The device for treating phenol-containing wastewater according to claim 1, characterized in that: The primary aerobic treatment system includes high-load activated sludge and is provided with a deodorization and sludge return system. The sludge return system includes a sludge return pump, through which the high-load activated sludge is returned and the sludge is discharged into the sludge pool.

9. The device for treating phenol-containing wastewater according to claim 1, characterized in that: The integrated biochemical equipment comprises a coagulation zone, a horizontal flow sedimentation zone, a biochemical zone, and a deep sedimentation zone which are arranged in sequence.

10. The device for treating phenol-containing wastewater according to claim 1, characterized in that: The integrated biochemical equipment is connected to an activated carbon filter to filter SS and chromaticity in the treated phenol-containing wastewater and then discharge it externally.

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