Wine brewing wastewater treatment system

Abstract

The utility model discloses a wine brewing wastewater treatment system. The wine brewing wastewater treatment system is composed of a grating filtering device, a microfiltration filtering device, an adjusting tank, an advanced air flotation device, a reaction tank, a primary sedimentation tank, an MCR tank, an advanced anaerobic reactor, a first-stage A tank, a first-stage O tank, a second-stage A tank, a second-stage O tank, an MBR tank, a catalytic electrolysis denitrification device, a coagulating sedimentation device and a precision filtering device. The brewing wastewater is filtered by a grating to separate larger particles in the brewing wastewater from the wastewater, the wastewater enters a regulating tank after passing through a microfiltration and separation device, then enters a reaction tank for dosing reaction after removing solid particles in the wastewater by an advanced air flotation device, and is precipitated by a primary precipitation tank, and the effluent enters an MCR tank to further remove macromolecular pollutants in the wastewater. The effluent enters an advanced anaerobic reactor for anaerobic biochemical treatment, the effluent enters an MBR device after being subjected to secondary AO treatment, the effluent is treated by the MBR device, and the effluent is discharged after reaching the standard after being subjected to catalytic electrolysis and coagulating sedimentation.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and particularly relates to a treatment system for brewing wastewater. Background Technique

[0002] During the production process of breweries, a lot of pollutants are generated, such as organic substances in wastewater. When using the Fenton advanced oxidation process, a large amount of chemicals are required, a large amount of sludge is generated, and the removal rate of lignin in brewing is not high; when using the nanofiltration process, the energy consumption is large, the membrane is easily fouled, frequent cleaning is required, and the efficiency is low. Moreover, the discharged wastewater contains a certain colority, and it is difficult to completely degrade it by biological treatment methods.

[0003] In addition, the existing brewing wastewater has large and fluctuating water volume periodically, especially in the third quarter of each year, the water volume is large and the pollutant content in the influent water quality is high. The existing technology sets a certain degree of adjustability during the operation of the wastewater treatment system to adapt to the changes in water quality and water volume. Therefore, the existing technology cannot cope with the problem of meeting the discharge standards with large water volume and fluctuating water quality.

[0004] Therefore, there is an urgent need for a brewing wastewater treatment system that can improve the effluent quality of brewing wastewater and still meet the discharge standards while coping with such large water volume and fluctuating water quality. Summary of the Invention

[0005] The purpose of the utility model is to overcome the defects of existing brewing sewage treatment technologies, etc., and provide a treatment system with high effluent quality and capable of coping with such large water volume and fluctuating water quality.

[0006] The utility model provides a treatment system for brewing wastewater, which is composed of a grille filtering device, a microfiltration filtering device, an adjustment tank, an advanced air flotation device, a reaction tank, a primary sedimentation tank, an MCR tank, an advanced anaerobic reactor, a first-stage A tank, a first-stage O tank, a second-stage A tank, a second-stage O tank, an MBR tank, a catalytic electrolytic denitrification device, a coagulation sedimentation device, a precision filtering device and a drainage system connected in sequence, wherein:

[0007] The grille filtering device is used for filtering large particles in the brewing wastewater;

[0008] The microfiltration filtering device is used for separating the distiller's grains from the wastewater in the brewing wastewater, facilitating the external transportation and utilization of the distiller's grains and the subsequent treatment of the wastewater;

[0009] The adjustment tank is used for storing and adjusting the wastewater;

[0010] The advanced air flotation device is used to remove the minute distiller's grains, fruit shells, oil stains, etc. in the wastewater through the action of microbubbles, and reduce the concentration of COD in the wastewater;

[0011] The reaction tank is used for adjusting the pH and then adding PAC and PAM to further remove the organic pollutants and / or SS in the wastewater;

[0012] The MCR tank is to add chemical treatment agents into the tank, intercept macromolecular organic pollutants dissolved in the wastewater through the MCR membrane, and form sludge to remove the macromolecular organic pollutants through the dosing reaction.

[0013] The advanced anaerobic reactor is used to remove a large amount of organic matter in the wastewater through anaerobic action, reduce the concentration of COD in the wastewater to below 500 mg / L, form biogas, and after desulfurization, the biogas is used or burned by the torch.

[0014] The first-level A tank, the first-level O tank, the second-level A tank, and the second-level O tank are used to remove the organic matter in the wastewater through the action of multiple A / O tanks. Nitrifying bacteria convert ammonia nitrogen into nitrates, and then denitrifying bacteria in the anoxic tank convert them into nitrogen gas, thereby removing the total nitrogen in the water.

[0015] The MBR tank is used to further decompose the organic matter in the wastewater through biochemical oxidation, reduce the concentration of COD in the wastewater, and at the same time, use the membrane filtration function of the MBR to separate the sludge from the effluent.

[0016] The catalytic electrolytic denitrification device is used to perform electrocatalytic advanced oxidation on the biochemical treatment tail water of brewing wastewater to remove the chromaticity, COD, residual ammonia nitrogen and total nitrogen of the brewing wastewater.

[0017] The coagulation and precipitation device is used to remove the total phosphorus, part of the residual COD and SS in the tail water of the biochemical treatment of brewing wastewater after catalytic electrolysis, and ensure that the effluent meets the discharge standard.

[0018] The precision filtration device is used to filter the residual solid particles and colloids in the tail water of the biochemical treatment of brewing wastewater after coagulation and precipitation; the precision filtration device is provided with a water inlet, a water outlet, a filter residue flushing water inlet and a filter residue flushing water outlet; the water inlet of the precision filtration device is communicated with the water outlet of the catalytic electrolytic denitrification device, and the water outlet of the precision filtration device is communicated with the drainage system.

[0019] Preferably, the slag removal pretreatment is from coarse to fine, and the wastewater is composed of a grille filtration device, a microfiltration filtration device, an advanced air flotation device, and a primary sedimentation tank.

[0020] The advanced air flotation device includes an air flotation tank, a water suction well, a dissolved air tank and a pressure release device. Under the action of a water pump, the wastewater circulates to the air flotation tank inlet through the dissolved air tank. Air is injected into the dissolved air tank and dissolved in the circulating wastewater, and the water containing air is sent to the inlet of the air flotation tank through the pressure release device for pressure release.

[0021] Preferably, after the wastewater is pretreated for slag removal, the MCR process is used to further remove the macromolecular organic pollutants in the wastewater.

[0022] Preferably, the advanced anaerobic reactor includes one or more of IC, EGSB, UASB, and ABR.

[0023] Preferably, the catalytic electrolysis device includes an electrolyzer, a DC power supply, a degassing tower, a catalyst dosing device, and an electrode cleaning device; the water inlet of the electrolyzer is connected to the water outlet of the MBR tank; the water outlet of the electrolyzer is connected to the water inlet of the degassing tower; the water outlet of the primary sedimentation tank or the MBR tank is connected to the water inlet of the electrolyzer, and a pipe mixer for mixing the catalyst is also installed in the pipeline of the catalytic electrolysis device; the outlet pipe of the catalyst dosing device is connected to the inlet pipe of the electrolyzer, and is installed before the pipe mixer on the inlet pipe of the electrolyzer; the water outlet of the degassing tower is set at a position 500 - 1000 mm away from the top of the degassing tower; the water outlet of the degassing tower is connected to the inlet pipe of the coagulation sedimentation device, and a tail water circulation port is also provided at a position 500 - 1000 mm away from the water outlet of the degassing tower, and is connected to the inlet pipe of the electrolyzer through a circulation water pump and a water pipe; the water outlet of the coagulation sedimentation device is connected to the precision filtration device; the water outlet of the precision filtration device is connected to the drainage system; the electrode cleaning device is composed of a pickling solution storage tower and a pickling solution delivery pump, and is connected to the electrolyzer through a pipeline, and the pickling solution is a 2% - 3% hydrochloric acid solution or a 4% - 6% citric acid solution.

[0024] Preferably, the water outlet of the coagulation sedimentation device is connected to the precision filtration device; the water outlet of the precision filtration device is connected to the drainage system.

[0025] Preferably, the electrolytic cell of the catalytic electrolyzer is a tubular electrolytic cell, and 1 - 6 stages of series-connected electrode groups are installed in the electrolytic cell. The anode of the electrode group is coated with one or more coatings of palladium, rhodium, ruthenium, iridium, tin, and rare earth dysprosium oxide, and the cathode is one or more of titanium plate, steel plate, aluminum plate, and stainless steel plate.

[0026] Preferably, the water inlet of the degassing tower is connected to a water distributor located at the bottom of the degassing tower, and the water outlet at the upper part of the degassing tower is connected to the inlet pipe of the coagulation sedimentation device.

[0027] Preferably, the coagulation sedimentation device includes a pH adjustment tank, a coagulation tank, and a flocculation tank. The pH adjustment tank, the coagulation tank, and the flocculation tank are respectively provided with a pH regulator dosing device, a coagulant dosing device, and a flocculant dosing device; the pH regulator dosing device, the coagulant dosing device, and the flocculant dosing device are respectively composed of a pH regulator storage tank, a coagulant storage tank, a flocculant storage tank, and a dosing pump; the pH regulator dosing device can directly and quantitatively add the pH regulator into the water delivery pipeline equipped with a pipe mixer.

[0028] Preferably, the electrode cleaning device further includes a mainframe pickling system, which consists of a pickling solution preparation tank and a pickling solution transfer pump.

[0029] Preferably, the brewing wastewater treatment system includes a sludge dewatering device for sludge treatment. The sludge treatment device includes a sludge pump, a sludge thickening tank, a physicochemical conditioning tank, and a dehydrator. The inlet of the sludge pump is respectively connected to the sludge outlets of the advanced air flotation device, the primary sedimentation tank, the MCR tank, the advanced anaerobic reactor, the first-stage A tank, the first-stage O tank, the second-stage A tank, the second-stage O tank, the MBR tank, the electrolytic denitrification device, and the sludge outlet of the coagulation sedimentation device. The outlet of the sludge pump is connected to the inlet of the sludge thickening tank. The sludge outlet of the sludge thickening tank is connected to the inlet of the physicochemical conditioning tank, and the sewage outlet of the sludge thickening tank is connected to the inlet of the coagulation sedimentation device. The outlet of the physicochemical conditioning tank is connected to the sludge inlet of the dehydrator. The mud cakes produced by the dehydrator are collected in the sludge collection area. The sewage of the dehydrator is connected to the inlet of the coagulation sedimentation device. The sludge outlet in the lower layer area of the sludge thickening tank is connected to the inlet of the dehydrator.

[0030] Preferably, the working voltage of the electrolyzer is 7 - 60V, and the current is 10 - 10000A.

[0031] Compared with the prior art, the present invention has the following obvious advantages:

[0032] 1. In the present invention, through multi-gradient pretreatment, large particle slag shells are removed by a grille and a microfiltration device, and fine slag shells in the wastewater are removed by an advanced air flotation device. Then, part of the organic pollutants are removed by adding medicine and precipitation to reduce the load of the subsequent biochemical process. Subsequently, the MCR tank process is innovatively introduced to remove most of the macromolecular organic pollutants such as lignin and protein in the wastewater. On the one hand, it can prevent the release of N and P of proteins in the subsequent anaerobic biochemical system and reduce the load of the aerobic biochemical process. On the other hand, the removal of most of the lignin greatly reduces the COD value of the hardly biodegradable biochemical effluent, ensuring the up-to-standard discharge of the system. The MCR tank process can also avoid the poisoning of the subsequent biochemical strains and improve the biochemical effect. Finally, the fine pretreatment process can effectively improve the efficiency of the subsequent treatment process and effectively ensure the stable operation of the system and meet the up-to-standard discharge requirements in the case of large fluctuations in the influent water volume and quality.

[0033] 2. In the present invention, by setting up an efficient pretreatment system, combined with an advanced anaerobic reactor + two-stage AO tanks + an MBR tank, organic pollutants and nitrogen can be effectively removed. The efficient pretreatment combined with the terminal coagulation sedimentation can effectively ensure the up-to-standard discharge of phosphorus.

[0034] 3. In the present utility model, by providing a catalytic electrolytic denitrification device to treat the effluent after biochemical treatment, the working voltage of the electrolyzer is 7 - 60 V, the current is 10 - 10,000 A, and the effluent after electrolysis enters a degassing tower for gas-liquid separation, which can effectively treat the main pollutants such as the chromaticity, COD, ammonia nitrogen, and total nitrogen of the tail water that cannot be treated in the biochemical process;

[0035] 4. The present utility model strictly complies with the laws, regulations, relevant specifications, and standards of environmental protection and the wastewater treatment of the liquor industry. After being treated by the system of the present utility model, all wastewater indexes are better than the discharge standard requirements, and there is no secondary pollution. The system of the present utility model is applicable to the situations of large fluctuations in water volume and water quality, operates stably, is economically reasonable, and the treated water quality can meet the standards stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of a treatment system for brewing wastewater of the present utility model;

[0037] Figure 2 is a schematic diagram of the advanced air flotation device 400.

[0038] Wherein: 100 - grille filtration device, 200 - microfiltration device, 300 - regulating tank, 400 - advanced air flotation device, 401 - air flotation tank, 402 - suction well, 403 - pressure release device, 404 - dissolved air tank, 500 - reaction tank, 600 - primary sedimentation tank, 700 - advanced anaerobic reactor, 800 - catalytic electrolytic denitrification device, 801 - electrolyzer, 802 - degassing tower, 803 - DC power supply, 900 - coagulation sedimentation device, 10,000 - precision filtration device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0040] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0041] As used herein, "one embodiment" or "an embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "upper", "top", "bottom", etc. are based on the orientation or positional relationships shown in the 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0042] Before further elaborating on the embodiments of the present application, the nouns and terms involved in the embodiments of the present application are described, and the nouns and terms involved in the embodiments of the present application are applicable to the following explanations.

[0043] MCR: Membrane Chemical Reactor;

[0044] MBR: Membrane Bioreactor;

[0045] ic: Anaerobic tower;

[0046] EGSB: Internal Circulation Anaerobic Treatment Technology;

[0047] The UASB (Upflow Anaerobic Sludge Blanket) sewage treatment process is a commonly used anaerobic biological treatment technology for removing pollutants in high-concentration organic wastewater, and is widely used in urban and industrial wastewater treatment due to its high efficiency, energy conservation, and environmental protection characteristics;

[0048] ABR: Anaerobic Baffled Reactor (referred to as ABR for short).

[0049] The following lists the preferred embodiments of the present application for further describing the brewing wastewater treatment system of the present application.

[0050] Embodiment 1

[0051] A treatment system for brewing wastewater, which is composed of a grille filtration device 100, a microfiltration device 200, an adjustment tank 200, an advanced air flotation device 400, a reaction tank 500, a primary sedimentation tank 600, an MCR tank, an advanced anaerobic reactor 700, a first-stage A tank, a first-stage O tank, a second-stage A tank, a second-stage O tank, an MBR tank, a catalytic electrolytic denitrification device 800, a coagulation sedimentation device 900, a precision filtration device 1000 and a drainage system connected in sequence. The brewing wastewater flows into the grille filtration device 100 to filter large particles in the brewing wastewater; then, the wastewater filtered by the grille is pumped into the microfiltration device 200 for filtration to separate the distiller's grains from the wastewater in the brewing wastewater. The distiller's grains are transported out of the factory as feed or fertilizer, and the wastewater enters the next treatment process; the adjustment tank 300 is used to store and adjust the wastewater; the treated wastewater flows into the advanced air flotation device 400, and through the action of microbubbles, the tiny distiller's grains, fruit shells, oil stains, etc. in the wastewater are removed, reducing the concentration of COD in the wastewater; then, after the advanced air flotation device 400 discharges water, the wastewater flows into the reaction tank 500. After adjusting the pH of the wastewater, PAC and PAM are added, and the wastewater enters the primary sedimentation tank 600 for sedimentation to further remove organic pollutants and SS in the wastewater; the dosing concentration of PAC is 80 mg / L, and the dosing concentration of PAM is 3 mg / L.

[0052] The sedimented wastewater enters the MCR tank, a chemical treatment agent is added to the tank, and the macromolecular organic pollutants dissolved in the wastewater are intercepted by the MCR membrane, and through the dosing reaction, the macromolecular organic pollutants are formed into sludge and removed; then the wastewater enters the advanced anaerobic reactor 700 to remove a large amount of organic matter in the wastewater through anaerobic action. In a specific embodiment, the advanced anaerobic reactor 700 can be IC, EGSB, UASB or ABR, and the biogas generated is desulfurized and then used for biogas utilization or torch combustion;

[0053] Then the wastewater passes through the first-stage A tank, the first-stage O tank, the second-stage A tank, and the second-stage O tank, which are used to remove the organic matter in the wastewater through the action of multiple A / O tanks. The nitrifying bacteria convert ammonia nitrogen into nitrate, and then the denitrifying bacteria in the anoxic tank convert it into nitrogen, thereby removing the total nitrogen in the water;

[0054] The effluent treated by the second-stage A / O tank passes through the MBR tank, which is used to further decompose the organic matter in the wastewater through biochemical oxidation, reducing the concentration of COD in the wastewater. At the same time, the membrane filtration effect of the MBR is used to separate the sludge from the effluent;

[0055] After biochemical treatment, the tail water discharged from the MBR tank is pumped into the catalytic electrolytic denitrification device 800, which is used for electrolytic advanced oxidation of the tail water of the brewing sewage after biochemical treatment to remove the chromaticity, COD and residual ammonia nitrogen, TN, TP and lignin of the brewing sewage; specifically, 1 to 6 catalytic electrolytic denitrification devices 800 can be selected and set in series for electrolytic advanced oxidation.

[0056] The coagulation sedimentation device 900 is used to remove the total phosphorus, partial residual COD and SS in the tail water of the biochemical treatment of brewing wastewater after catalytic electrolysis, ensuring that the effluent meets the discharge standard.

[0057] The precision filtration device 1000 is used to filter the residual solid particles and colloids in the tail water of the biochemical treatment of brewing sewage after coagulation sedimentation. The precision filtration device 1000 is provided with a water inlet, a water outlet, a filter residue flushing water inlet and a filter residue flushing water outlet. The water inlet of the precision filtration device 1000 is communicated with the water outlet of the catalytic electrolysis denitrification device 800, and the water outlet of the precision filtration device 1000 is communicated with the drainage system.

[0058] Example 2

[0059] A treatment system for brewing wastewater, which is composed of a grille filtration device 100, a microfiltration device 200, an adjustment tank 300, an advanced air flotation device 400, a reaction tank 500, a primary sedimentation tank 600, an MCR tank, an advanced anaerobic reactor 700, a first-stage A tank, a first-stage O tank, a second-stage A tank, a second-stage O tank, an MBR tank, a catalytic electrolysis denitrification device 800, a coagulation sedimentation device 900, a precision filtration device 1000 and a drainage system connected in sequence. The wastewater passes through the grille filtration device 100, the microfiltration device 200, the advanced air flotation device 400 and the primary sedimentation tank 600 to form a slag removal pretreatment system.

[0060] The brewing wastewater flows into the grille filtration device 100 to filter the large particles in the brewing wastewater. Then, the wastewater filtered by the grille is pumped into the microfilter 200 for filtration to separate the distiller's grains from the wastewater. The distiller's grains are transported out of the plant as feed or fertilizer, and the wastewater enters the next treatment process. The adjustment tank 300 is used to store and adjust the wastewater. The treated wastewater flows into the advanced air flotation device 400. The advanced air flotation device 400 includes an air flotation tank 401, a water absorption well 402, a dissolved air tank 404 and a pressure release device 403. Under the action of a water pump, the wastewater circulates through the dissolved air tank 404 to the inlet of the air flotation tank 401. Air is injected into the dissolved air tank 404 and dissolved in the circulating wastewater, and the water containing air is sent to the inlet of the air flotation tank 401 through the pressure release device 403 for pressure release.

[0061] After the advanced air flotation device 400 discharges water, the wastewater flows into the reaction tank 500. After adjusting the pH of the wastewater, PAC and PAM are added, and the wastewater enters the primary sedimentation tank 600 for sedimentation to further remove the organic pollutants and SS in the wastewater. The PAC dosing concentration is 80 mg / L and the PAM dosing concentration is 3 mg / L.

[0062] After the wastewater is pretreated to remove slag, the precipitate enters the sludge treatment device, and the wastewater enters the MCR pool. A chemical treatment agent is added to the pool, and the MCR membrane is used to intercept the macromolecular organic pollutants dissolved in the wastewater. Through the addition of medicine and reaction, the macromolecular organic pollutants are formed into sludge and removed. Then the wastewater enters the advanced anaerobic reactor 700 to remove a large amount of organic matter in the wastewater through anaerobic action. In a specific embodiment, the advanced anaerobic reactor 700 can be an IC, EGSB, UASB or ABR. The biogas generated is desulfurized and then used for biogas utilization or flared.

[0063] Then the wastewater passes through the first-level A pool, the first-level O pool, the second-level A pool, and the second-level O pool to remove the organic matter in the wastewater through the action of multiple A / O pools. Nitrifying bacteria convert ammonia nitrogen into nitrate, and then denitrifying bacteria in the anoxic pool are used to convert it into nitrogen, thereby removing the total nitrogen in the water.

[0064] The effluent treated by the second-level A / O pool passes through the MBR pool to further decompose the organic matter in the wastewater through biochemical oxidation, reduce the concentration of COD in the wastewater. At the same time, the membrane filtration function of the MBR is used to separate the sludge from the effluent.

[0065] After biochemical treatment, the tail water discharged from the MBR tank is pumped into the catalytic electrolytic denitrification device 800 for advanced electrolytic oxidation of the tail water of the brewery sewage after biochemical treatment to remove the chromaticity, COD, residual ammonia nitrogen and total nitrogen of the brewery sewage; the catalytic electrolytic denitrification device 800 includes an electrolyzer 801, a DC power supply 803, a degassing tower 802, a catalyst dosing device and an electrode cleaning device; the water inlet of the electrolyzer 801 is connected to the water outlet of the MBR tank; the water outlet of the electrolyzer 801 is connected to the water inlet of the degassing tower 802; the water outlet of the primary sedimentation tank 600 or the MBR tank is connected to the water inlet of the electrolyzer. A pipe mixer for mixing the catalyst is also installed in the pipeline of the catalytic electrolysis device; the water outlet pipe of the catalyst dosing device is connected to the water inlet pipe of the electrolyzer 801 and is installed before the pipe mixer on the water inlet pipe of the electrolyzer; the water outlet of the degassing tower is arranged at a position 500-1000 mm away from the top of the degassing tower; the water outlet of the degassing tower is connected to the water inlet pipe of the coagulation sedimentation device. A tail water circulation port is also provided at a position 500-1000 mm away from the water outlet of the degassing tower and is connected to the water inlet pipe of the electrolyzer through a circulation water pump and a water pipe; the water outlet of the coagulation sedimentation device 900 is connected to the precision filtration device 1000; the water outlet of the precision filtration device 1000 is connected to the drainage system; the electrode cleaning device is composed of a pickling solution storage tower and a pickling solution delivery pump and is connected to the electrolyzer through a pipeline. The pickling solution is a 2%-3% hydrochloric acid solution or a 4%-6% citric acid solution. The electrolytic cell of the catalytic electrolyzer 801 is a tubular electrolytic cell, and 1-6 stages of serially connected electrode groups are installed in the electrolytic cell. The anode of the electrode group is coated with a coating of one or more of palladium, rhodium, ruthenium, iridium, tin and rare earth dysprosium oxide, and the cathode is one or more of a titanium plate, a steel plate, an aluminum plate and a stainless steel plate. The water inlet of the degassing tower is connected to a water distributor located at the bottom of the degassing tower, and the water outlet at the upper part of the degassing tower is connected to the water inlet pipe of the coagulation sedimentation device 900.

[0066] The coagulation sedimentation device 900 includes a pH adjustment tank, a coagulation tank and a flocculation tank. The pH adjustment tank, the coagulation tank and the flocculation tank are respectively provided with a pH regulator dosing device, a coagulant dosing device and a flocculant dosing device; the pH regulator dosing device, the coagulant dosing device and the flocculant dosing device are respectively composed of a pH regulator storage tank, a coagulant storage tank, a flocculant storage tank and a dosing pump; the pH regulator dosing device can directly and quantitatively add the pH regulator into the water conveyance pipeline equipped with a pipe mixer. After the brewery wastewater is catalytically electrolyzed and passes through the coagulation sedimentation device, the total phosphorus, part of the residual COD and SS in the tail water can be treated to ensure that the effluent meets the discharge standard.

[0067] The precision filtration device 1000 is used to filter the residual solid particles and colloids in the biochemical treatment tail water of brewing wastewater after coagulation and sedimentation. The precision filtration device 1000 is provided with a water inlet, a water outlet, a filter residue flushing water inlet and a filter residue flushing water outlet. The water inlet of the precision filtration device 1000 is communicated with the water outlet of the catalytic electrolytic denitrification device 800, and the water outlet of the precision filtration device is communicated with the drainage system.

[0068] The treatment system of brewing wastewater is provided with a sludge treatment device, including a sludge pump, a sludge thickening tank, a physical and chemical conditioning tank and a dehydrator. The inlets of the sludge pump are respectively communicated with the sludge outlets of the advanced air flotation device 400, the primary sedimentation tank 600, the MCR tank, the advanced anaerobic reactor 700, the first-stage A tank, the first-stage O tank, the second-stage A tank, the second-stage O tank, the MBR tank, the catalytic electrolytic denitrification device 800 and the coagulation and sedimentation device 900. The outlet of the sludge pump is communicated with the inlet of the sludge thickening tank. The sludge outlet of the sludge thickening tank is communicated with the inlet of the physical and chemical conditioning tank. The sewage outlet of the sludge thickening tank is communicated with the water inlet of the coagulation and sedimentation device 900. The outlet of the physical and chemical conditioning tank is communicated with the sludge inlet of the dehydrator. The mud cakes produced by the dehydrator are collected in the sludge collection area. The sewage of the dehydrator is communicated with the water inlet of the coagulation and sedimentation device 900. The sludge outlet in the lower layer area of the sludge thickening tank is communicated with the inlet of the dehydrator. The sludge treatment device fully discharges and effectively utilizes the sludge generated in the system device.

[0069] The following lists the preferred embodiments of the present application for further describing the usage method of the treatment system of brewing wastewater of the present application.

[0070] According to the treatment system of brewing wastewater of the present application, the brewing wastewater enters the grille through the sewage pipe network, and the microfiltration device removes larger suspended solids. The effluent passes through the advanced air flotation device to remove the oil and fine suspended solids in the wastewater, and a uniform mud cake is formed on the surface of the air flotation tank and removed. The air flotation effluent flows into the reaction tank, the pH is adjusted to neutral, 80 mg / L of PAC and 3 mg / L of PAM are added, and a coagulation reaction is carried out. Part of the organic matter in the wastewater is adsorbed on the flocs and removed by sedimentation in the primary sedimentation tank. The precipitated wastewater enters the MCR tank for coagulation and membrane filtration to remove fine suspended solids and intercept macromolecular organic matter, and part of the dissolved ions dissolved in wastewater and lignin is removed by the action of the coagulant, reducing the hardness, heavy metal ions, chromaticity and suspended solids in the wastewater. after avoiding subsequent poisoning of biochemical strains and improving the biochemical effect. The concentration of pollutants in the effluent is further reduced, and TN, TP and lignin are also reduced, thus ensuring the efficient treatment effect of the anaerobic system and preventing the release of nitrogen and phosphorus during the anaerobic process. After the pH of the effluent is adjusted to 6.8 - 7.2, it enters the advanced anaerobic reactor.

[0071] Under the action of anaerobic bacteria in the advanced anaerobic reactor, a large number of organic pollutants in the wastewater are decomposed, and the biogas produced is sent to the torch for combustion after desulfurization treatment. The anaerobic effluent enters the "two-stage AO + MBR" process, where aerobic microorganisms are beneficial for removing organic matter in the wastewater. Nitrifying bacteria convert ammonia nitrogen into nitrate, and then denitrifying bacteria convert nitrate into nitrogen, thereby removing the total nitrogen in the water. The tail water after biochemical treatment is pumped into the electrolyzer for catalytic electrolysis. The working voltage of the electrolyzer is 7 - 60V, and the current is 10 - 10000A. The effluent after electrolysis enters the degassing tower for gas-liquid separation. The effluent index after electrolytic purification is: COD ≤ 50mg / L, BOD ≤ 3mg / L, ammonia nitrogen ≤ 2mg / L, total nitrogen ≤ 15mg / L, chromaticity less than 5, and fecal coliform count less than 3 per liter. The tail water after electrolysis is quantitatively pumped from the degassing tower to coagulation sedimentation, and 3 a coagulant is added at 80 - 150g / m 3 PAM is added as a coagulant aid, and more than 95% of the total phosphorus is removed, and the effluent meets the discharge standards;

[0072] Table of influent and effluent water quality of wastewater

[0073]

[0074] Example 4

[0075] The brewing wastewater treatment system for the wastewater passes through the advanced air flotation device, primary sedimentation tank, physical and chemical sludge obtained from coagulation sedimentation, and aerobic excess sludge discharged from the MBR tank. After concentration, PAM is added at 5kg / t.DS and enters the spiral press sludge dewatering machine. The sludge with a water content of 99% is filtered to less than 70%, and then it is entrusted to a professional sludge treatment unit with qualifications for external transportation or used for soil improvement, etc.

[0076] Among them, the supernatant after sludge concentration and the filtrate after sludge dewatering are refluxed to the regulation tank.

[0077] The above is only the specific implementation manner of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept shall belong to the act of infringing the protection scope of the present utility model.

Claims

1. A brewery wastewater treatment system, characterized in that: The invention is composed of a grid filter device (100), a microfiltration filter device (200), a regulating tank (300), an advanced flotation device (400), a reaction tank (500), a primary sedimentation tank (600), an MCR tank, an advanced anaerobic reactor (700), a primary A tank, a primary O tank, a secondary A tank, a secondary O tank, an MBR tank, a catalytic electrolytic denitrification device (800), a coagulation sedimentation device (900), a precision filtration device (1000) and a drainage system, wherein: The grid filter device (100) is used to filter large particles in brewing wastewater; The microfiltration device (200) is used to filter and separate the lees from the wastewater in the brewing wastewater, so as to facilitate the transportation and utilization of the lees and the subsequent treatment of the wastewater; The regulating tank (300) is used to store and regulate wastewater; The advanced air flotation device (400) is used to remove tiny lees, fruit shells and oil stains in the wastewater through the action of microbubbles, thereby reducing the concentration of COD in the wastewater; The reaction tank (500) is used to adjust the pH and then add PAC and PAM to further remove organic pollutants and / or SS in the wastewater; The MCR tank is a tank where chemical treatment agents are added to the tank, and the macromolecular organic pollutants dissolved in the wastewater are intercepted by the MCR membrane, and the macromolecular organic pollutants are formed into sludge and removed through the reaction of adding the drug; The advanced anaerobic reactor (700) is used to remove a large amount of organic matter in the wastewater through anaerobic action, reduce the COD concentration in the wastewater to below 500 mg / L, and generate biogas for desulfurization and utilization or flaring; The primary A pool, primary O pool, secondary A pool, and secondary O pool are used to remove organic matter in wastewater through the action of multi-stage A / O pools by aerobic microorganisms, and nitrifying bacteria convert ammonia nitrogen into nitrates, which are then converted into nitrogen gas by denitrifying bacteria in the anoxic pool, thereby removing total nitrogen from the water; The MBR pool is used to further decompose organic matter in the wastewater through biochemical oxidation to reduce the COD concentration in the wastewater. At the same time, the membrane filtration effect of the MBR is used to separate the sludge from the effluent. The catalytic electrolysis denitrification device (800) is used to perform electrolytic advanced oxidation on the tail water of the biochemical treatment of brewery wastewater to remove the chromaticity, COD and residual ammonia nitrogen and total nitrogen of the brewery wastewater; The coagulation and sedimentation device (900) is used to remove total phosphorus, some residual COD and SS in the tail water of the biochemical treatment of brewery wastewater after catalytic electrolysis; The precision filtering device (1000) is used to filter the residual solid particles and colloids in the tail water of the biochemical treatment of brewing wastewater after coagulation and sedimentation; the precision filtering device (1000) is provided with a water inlet, a water outlet, a filter residue flushing water inlet and a filter residue flushing water outlet; the water inlet of the precision filtering device (1000) is connected to the water outlet of the catalytic electrolytic denitrification device (800), and the water outlet of the precision filtering device (1000) is connected to the drainage system.

2. A brewery wastewater treatment system according to claim 1, characterized in that: The advanced air flotation device (400) comprises an air flotation tank (401), a water absorption well (402), an air dissolving tank (404) and a pressure release device (403). Under the action of a water pump, wastewater is circulated to the inlet of the air flotation tank (401) through the air dissolving tank (404); air is injected into the air dissolving tank (404) and dissolved in the circulating wastewater, and the water containing air is sent to the inlet of the air flotation tank (401) through the pressure release device (403) to release the pressure.

3. A brewery wastewater treatment system according to claim 1, characterized in that: The advanced anaerobic reactor (700) includes one or more of IC, EGSB, UASB and ABR.

4. A brewery wastewater treatment system according to claim 1, characterized in that: The catalytic electrolysis denitrification device (800) comprises an electrolyzer (801), a DC power supply (803), a degassing tower (802), a catalyst dosing device and an electrode cleaning device; the water outlet of the primary sedimentation tank (600) or the MBR tank is connected to the water inlet of the electrolyzer, and a pipeline mixer for mixing catalysts is also installed in the pipeline of the catalytic electrolysis denitrification device (800); the water outlet pipe of the catalyst dosing device is connected to the water inlet pipe of the electrolyzer and is installed before the pipeline mixer of the water inlet pipe of the electrolyzer; the water outlet of the electrolyzer is connected to the degassing tower (803). 802); the water outlet of the degassing tower (802) is arranged at 500 to 1000 mm from the top of the degassing tower (802); the water outlet of the degassing tower (802) is connected to the water inlet pipe of the coagulation and sedimentation device (900), and a tail water circulation port is also provided at a position 500 to 1000 mm from the water outlet of the degassing tower (802), and is connected to the water inlet pipe of the electrolyzer through a circulating water pump and a water pipe; the electrode cleaning device is composed of a pickling solution storage tower and a pickling solution delivery pump, and is connected to the electrolyzer through a pipeline.

5. A brewery wastewater treatment system according to claim 1, characterized in that: The water outlet of the coagulation and sedimentation device (900) is connected to the precision filtering device (1000); and the water outlet of the precision filtering device (1000) is connected to the drainage system.

6. A brewery wastewater treatment system according to claim 4, characterized in that: The electrolytic cell of the electrolyzer (801) is a tubular electrolytic cell, in which 1 to 6 electrode groups connected in series are installed, the anode of the electrode group is coated with one or more coatings of palladium, rhodium, ruthenium, iridium, tin and rare earth dysprosium oxide, and the cathode is one or more of titanium plate, steel plate, aluminum plate and stainless steel plate.

7. A brewery wastewater treatment system according to claim 4, characterized in that: The water inlet of the degassing tower (802) is connected to a water distributor located at the bottom of the degassing tower (802), and the water outlet at the top of the degassing tower (802) is connected to a water inlet pipe of a coagulation and sedimentation device.

8. A brewery wastewater treatment system according to claim 1, characterized in that: The coagulation and sedimentation device comprises a pH adjusting tank, a coagulation tank and a coagulant aid tank, wherein the pH adjusting tank, the coagulation tank and the coagulant aid tank are respectively provided with a pH adjusting agent dosing device, a coagulant dosing device and a coagulant aid dosing device; the pH adjusting agent dosing device, the coagulant dosing device and the coagulant aid dosing device are respectively composed of a pH adjusting agent storage tank, a coagulant storage tank, a coagulant aid storage tank and a dosing pump; the pH adjusting agent dosing device can directly and quantitatively add the pH adjusting agent into a water delivery pipeline equipped with a pipeline mixer.

9. A brewery wastewater treatment system according to claim 4, characterized in that: The electrode cleaning device also includes a host pickling system, which is composed of a pickling solution preparation tank and a pickling solution delivery pump.

10. A brewery wastewater treatment system according to claim 1, characterized in that: The brewery wastewater treatment system comprises a sludge dewatering device for sludge treatment, the sludge treatment device comprises a sludge pump, a sludge concentration tank, a physical and chemical conditioning tank and a dewatering machine, the inlet of the sludge pump is respectively connected to the sludge outlet of the advanced flotation device (400), the primary sedimentation tank (600), the MCR tank, the advanced anaerobic reactor (700), the primary A tank, the primary O tank, the secondary A tank, the secondary O tank, the MBR tank, the electrolytic denitrification device (800) and the coagulation sedimentation device (900) The sludge outlet of the sludge pump is connected to the inlet of the sludge thickening tank, the sludge outlet of the sludge thickening tank is connected to the inlet of the physical and chemical conditioning tank, and the sewage outlet of the sludge thickening tank is connected to the water inlet of the coagulation and sedimentation device (900); the outlet of the physical and chemical conditioning tank is connected to the sludge inlet of the dewatering machine, the mud blocks produced by the dewatering machine are collected in the sludge collecting flat, and the sewage of the dewatering machine is connected to the water inlet of the coagulation and sedimentation device; the sludge outlet of the lower layer area in the sludge thickening tank is connected to the inlet of the dewatering machine.

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