A treatment method and special device for resource utilization of methanol catalyst production wastewater

Abstract

The application discloses a treatment method and a conversion device for resource utilization of methanol catalyst production wastewater, and the treatment method comprises the following steps: uniformly mixing anaerobic granular sludge, composite anaerobic bacteria and composite fillers to form mixed fillers, filling the mixed fillers into an anaerobic biological denitrification filter column, making methanol catalyst production wastewater enter the anaerobic biological denitrification filter column from the bottom, and then sequentially performing A / O biological denitrification process and sulfur autotrophic denitrification biological denitrification process on the wastewater after preliminary anaerobic biological denitrification of the wastewater by the mixed fillers. Compared with the prior art, the application realizes rapid treatment of methanol catalyst production wastewater by using the anaerobic biological denitrification filter column. Meanwhile, by combining the A / O + sulfur autotrophic denitrification process, the composite fillers, the anaerobic granular sludge and the composite anaerobic bacteria, rapid reproduction and biofilm formation of microorganisms are realized, and the application has the advantages of efficient denitrification, simple equipment, low operation cost, environmental protection and the like.

Description

Technical Field

[0001] This invention belongs to the field of resource utilization technology of methanol catalyst production wastewater, specifically relating to a treatment method and special device for resource utilization of methanol catalyst production wastewater. Background Technology

[0002] Resource utilization of industrial wastewater, such as wastewater generated during chemical production processes, is an important direction for the development of the environmental protection industry today. By utilizing industrial wastewater, enterprises can increase their economic benefits, enhance their market competitiveness, and effectively solve environmental pollution problems.

[0003] In recent years, with the rapid development of the chemical industry and the increase in chemical output, a large amount of industrial wastewater has also been generated, leading to increasing pollution of the natural environment. To date, the research on the resource utilization of industrial wastewater remains one of the hot topics in chemical industry research.

[0004] Methanol, as an organic chemical, is an important basic chemical raw material with a wide range of end products. It plays a crucial role in the new energy strategy, such as methanol-to-olefins, methanol-to-fuel, and the preparation of other downstream products such as synthetic catalysts, all of which are based on methanol as a raw material.

[0005] The methanol synthesis catalyst production process consumes a large amount of water and generates various pollutants. Therefore, water recycling is crucial for the healthy development of the methanol synthesis catalyst industry. In the wastewater from methanol catalyst production, excessively high nitrogen concentrations are a major problem preventing direct recovery and reuse.

[0006] Biological denitrification technology is a common wastewater treatment method. Its principle involves using denitrifying bacteria to reduce nitrates in wastewater to nitrogen gas under anoxic / anaerobic conditions. This method effectively removes nitrogenous pollutants from wastewater, achieving water purification.

[0007] Denitrifying bacteria play a crucial role in the nitrogen removal process. These bacteria mainly grow in anaerobic or hypoxic environments and carry out metabolic activities by utilizing organic matter in wastewater.

[0008] However, traditional biological denitrification technology also has some limitations, such as long start-up time, large footprint of biological filters, high operation difficulty, and low denitrification efficiency. Summary of the Invention

[0009] Objective of the Invention: Addressing the problems existing in current technologies, this invention provides a method and dedicated apparatus for the resource utilization of methanol catalyst production wastewater. This invention introduces a novel anaerobic biological denitrification filter column, filled with a mixture of composite packing material and anaerobic granular sludge with composite anaerobic bacteria. Sodium acetate is used as a supplementary carbon source, and the process is combined with an A / O tank and a sulfur autotrophic denitrification filter column to further degrade total nitrogen. This method features rapid start-up, short residence time, and low carbon source cost in the treatment and resource utilization of methanol catalyst production wastewater. The treatment and resource utilization of methanol catalyst production wastewater are achieved by utilizing anaerobic biological denitrification combined with A / O and sulfur autotrophic denitrification, filled with composite packing material and composite anaerobic denitrifying bacteria.

[0010] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A method for the resource utilization of methanol catalyst production wastewater includes uniformly mixing anaerobic granular sludge, composite anaerobic bacteria, and composite packing material to form a mixed packing material, which is then filled into an anaerobic biological denitrification filter column. The methanol catalyst production wastewater enters the anaerobic biological denitrification filter column from the bottom and undergoes preliminary anaerobic biological denitrification through the mixed packing material, followed by sequential A / O biological denitrification process and sulfur autotrophic denitrification biological denitrification process.

[0012] As a specific implementation scheme, the composite filler is mainly composed of the following raw materials in parts by weight:

[0013] A porous material is prepared by adding an activator and a binder to 25-35 parts waste minerals, 15-25 parts steel slag, 5-15 parts loofah sponge, 5-15 parts polyurethane, and 25-35 parts a mixture containing trace elements; preferably, the mixture contains 5-7 parts phosphorus, 5-7 parts potassium, 5-7 parts magnesium, 5-7 parts cobalt, and 5-7 parts zinc; the activator is selected from commercially available NaOH; and the binder is selected from commercially available epoxy resin adhesives.

[0014] The composite anaerobic bacteria are mainly composed of the following raw materials in parts by weight:

[0015] 35-45 samples of *Taurella*, 20-30 samples of *Vibrio azotocinus*, 5-15 samples of *Clostridium*, 5-15 samples of *Microbes*, 5-15 samples of *Bacillus thuringiensis*, and 2-8 samples of *Methylmonas*.

[0016] As a specific implementation plan, the amount of composite packing is 65-70% of the effective volume of the anaerobic biological denitrification filter column, the amount of anaerobic granular sludge added is 18-22% of the effective volume of the anaerobic biological filter column, and the amount of composite anaerobic bacteria agent added is 1.5-2.5% of the effective volume of the anaerobic biological filter column.

[0017] As a specific implementation scheme, the total nitrogen concentration of the methanol catalyst production wastewater is approximately 1900-2100 mg / L, the COD concentration is 60-70 mg / L, and the pH is 7-8. Before treating the methanol catalyst production wastewater, sodium acetate is added as a supplementary carbon source to make the COD in the wastewater reach 6000-6200 mg / L, the C / N ratio is (2.5-3.5):1, and the pH of the wastewater is adjusted to 1-2.

[0018] As a specific implementation plan, the residence time of the methanol catalyst production wastewater in the anaerobic biological denitrification filter column is 18-22 hours; the microbial reaction temperature inside the filter column is 25-35℃.

[0019] As a specific implementation plan, the A / O biological denitrification process adopts an A / O filter, wherein the amount of anoxic sludge and aerobic sludge added are 18-22% of the effective volume of the filter, and the total operating retention time is 10-14h; the sulfur autotrophic denitrification biological denitrification process adopts a sulfur autotrophic denitrification filter column, wherein the sulfur autotrophic denitrification filter media is filled to 62-70% of the effective volume of the filter column, the amount of sulfur autotrophic denitrification bacteria added is 8-12% of the effective volume, the operating retention time is 4-6h, and the microbial reaction temperature in the filter column is 25-35℃.

[0020] This invention also provides a dedicated device for the above-mentioned treatment method, comprising an inlet tank, an anaerobic biological denitrification filter column, an A tank, an O tank, a sedimentation tank, a sulfur autotrophic denitrification filter column, and a final outlet tank connected in sequence. The anaerobic biological denitrification filter column and the sulfur autotrophic denitrification filter column both receive water through inlets located at or near the bottom and exit through outlets located near the top. The A tank, O tank, and sedimentation tank all receive or exit water through inlets and outlets located near the top. The side wall of the anaerobic biological denitrification filter column has a pre-temperature constant-temperature outlet located near the top, which is connected to the constant-temperature water inlet at the bottom of the anaerobic biological denitrification filter column via a self-controlled constant-temperature heater. The anaerobic biological denitrification filter column is filled with mixed packing material. The bottoms of the A tank and the sedimentation tank are connected by pipelines. The sulfur autotrophic denitrification filter column is filled with sulfur autotrophic denitrification filter media mixed with sulfur autotrophic denitrifying bacteria.

[0021] As a specific implementation plan, the side wall of the anaerobic biological denitrification filter column is also provided with a circulating water outlet and a circulating water inlet, which are connected by a pipeline, with the circulating water inlet located below the circulating water outlet.

[0022] As a specific implementation plan, the top of the anaerobic biological denitrification filter column is a three-phase separation zone, which is connected to the gas collection chamber outside the anaerobic biological denitrification filter column through a pipeline; the A tank is equipped with a stirrer for stirring the liquid in the A tank; the O tank is equipped with an aerator for aerating the O tank.

[0023] As a specific implementation plan, a first outlet bucket is provided between the outlet of the anaerobic biological denitrification filter column and the inlet of tank A; a second outlet bucket is provided between the outlet of the sedimentation tank and the inlet of the sulfur autotrophic denitrification filter column.

[0024] The method and apparatus of this invention mainly involve uniformly mixing anaerobic granular sludge, composite anaerobic bacteria, and composite packing material, then filling the mixture into an anaerobic biological denitrification filter column. The water enters the filter column from the bottom via an inlet pump, passes upwards through a biological reaction zone containing a mixture of composite packing material and anaerobic granular sludge-composite bacteria, and exits from the top of the reactor, completing preliminary anaerobic biological denitrification. The effluent from this process is then pumped into an A / O biological filter for further biological denitrification and removal of residual organic matter. Finally, the effluent is pumped into a sulfur autotrophic denitrification filter column for ultra-clean denitrification, achieving resource utilization. In summary, this invention utilizes an anaerobic biological denitrification filter column to achieve rapid treatment of methanol catalyst production wastewater. Simultaneously, by combining the A / O + sulfur autotrophic denitrification process with composite packing material, anaerobic granular sludge, and composite anaerobic bacteria, it enables rapid microbial reproduction and biofilm formation, offering advantages such as high-efficiency denitrification, simple equipment, low operating costs, and environmental friendliness.

[0025] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0026] 1) This application employs anaerobic biological treatment technology, combined with A / O and sulfur autotrophic denitrification technology, to provide a feasible technology for the continuous and efficient treatment of methanol catalyst production wastewater. The total nitrogen is efficiently removed from the wastewater by a composite anaerobic bacteria under anaerobic / anoxic conditions through a carbon source supplemented in the wastewater.

[0027] 2) This application designs a complete set of high-efficiency reaction system. When the total nitrogen concentration is 2000 mg / L, the CN ratio reaches 3:1, and the reaction temperature is controlled at 20-30℃, the reaction system can achieve a total nitrogen removal rate of more than 99%, and the system is continuously stable, realizing the resource-based treatment of methanol catalyst production wastewater, and the effluent meets the standards for industrial reuse water.

[0028] 3) This application introduces composite packing material and composite anaerobic bacteria into the treatment of methanol catalyst production wastewater, solving the problems of high total nitrogen, low treatment efficiency, and inability to utilize resources. The technical method of treating methanol catalyst production wastewater by combining anaerobic biological denitrification with A / O and sulfur autotrophic denitrification with composite packing material and composite anaerobic bacteria has advantages such as high treatment efficiency, effective improvement of economic benefits, and sufficient compliance with reuse water standards. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the dedicated device structure for the processing method of the present invention.

[0030] Figure 2This is a trend diagram (pH change) of the wastewater treatment process in Embodiment 1 of the present invention.

[0031] Figure 3 This is a trend diagram (COD change) of the wastewater treatment process in Embodiment 1 of the present invention.

[0032] Figure 4 This is a trend diagram (total nitrogen TN change) of the wastewater treatment process in Example 1 of the present invention.

[0033] Figure 5 This is a trend diagram (pH change) of the wastewater treatment process in Embodiment 2 of the present invention.

[0034] Figure 6 This is a trend diagram (COD change) of the wastewater treatment process in Embodiment 2 of the present invention.

[0035] Figure 7 This is a trend diagram (change in total nitrogen TN) of the wastewater treatment process in Example 2 of the present invention.

[0036] Figure 8 This is a trend diagram (pH change) of the wastewater treatment process in Example 3 of the present invention.

[0037] Figure 9 This is a trend diagram (COD change) of the wastewater treatment process in Embodiment 3 of the present invention.

[0038] Figure 10 This is a trend diagram (change in total nitrogen TN) of the wastewater treatment process in Example 3 of the present invention. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following embodiments. Unless otherwise specified, the experimental methods used in the embodiments are conventional methods, and the materials and reagents used are commercially available unless otherwise specified.

[0040] A method for the resource utilization of methanol catalyst production wastewater includes uniformly mixing anaerobic granular sludge, composite anaerobic bacteria, and composite packing material to form a mixed packing material, which is then filled into an anaerobic biological denitrification filter column. The methanol catalyst production wastewater enters the anaerobic biological denitrification filter column from the bottom and undergoes preliminary anaerobic biological denitrification through the mixed packing material, followed by sequential A / O biological denitrification process and sulfur autotrophic denitrification biological denitrification process.

[0041] The composite filler is mainly composed of the following raw materials in parts by weight:

[0042] A porous material is prepared by adding an activator and a binder to 30 parts waste minerals, 20 parts steel slag, 10 parts loofah sponge, 10 parts polyurethane, and 30 parts a mixture containing trace elements; the trace element mixture contains 6 parts phosphorus, 6 parts potassium, 6 parts magnesium, 6 parts cobalt, and 6 parts zinc; the activator is selected from commercially available NaOH; and the binder is selected from commercially available epoxy resin adhesives.

[0043] The composite anaerobic bacteria are mainly composed of the following raw materials in parts by weight:

[0044] 40 samples of *Taurella*, 25 samples of *Vibrio azotocinus*, 10 samples of *Clostridium*, 10 samples of *Microbes*, 10 samples of *Bacillus thuringiensis*, and 5 samples of *Methylmonas*.

[0045] The composite packing material is filled to 2 / 3 of the effective volume of the anaerobic biological denitrification filter column, the anaerobic granular sludge is added to 20% of the effective volume of the anaerobic biological filter column, and the composite anaerobic bacteria agent is added to 2% of the effective volume of the anaerobic biological filter column.

[0046] The total nitrogen concentration of the methanol catalyst production wastewater is approximately 1900-2100 mg / L, the COD concentration is 60-70 mg / L, and the pH is 7-8. Before treatment, sodium acetate is added as a supplementary carbon source to make the COD in the wastewater reach 6000-6200 mg / L, the C / N ratio is (2.5-3.5):1, and the pH of the wastewater is adjusted to 1-2.

[0047] The methanol catalyst production wastewater has a residence time of 20 hours in the anaerobic biological denitrification filter column; the microbial reaction temperature inside the filter column is 25-35℃.

[0048] The A / O biological denitrification process uses an A / O filter, with anoxic sludge and aerobic sludge added at 20% of the effective volume of the filter, and a total operating retention time of 12 hours. The sulfur autotrophic denitrification biological denitrification process uses a sulfur autotrophic denitrification filter column, with the sulfur autotrophic denitrification filter media filled to 2 / 3 of the effective volume of the filter column, the sulfur autotrophic denitrification bacteria added at 10% of the effective volume, an operating retention time of 5 hours, and a microbial reaction temperature of 25-35℃ inside the filter column.

[0049] The dedicated device for the above processing method, such as Figure 1As shown, the system includes, in sequence, an inlet tank 1, an anaerobic biological denitrification filter column 2, an A tank 3, an O tank 4, a sedimentation tank 5, a sulfur autotrophic denitrification filter column 6, and a final outlet tank 7. Both the anaerobic biological denitrification filter column 2 and the sulfur autotrophic denitrification filter column 6 receive water through inlets located at or near the bottom and exit through outlets located near the top. The A tank 3, O tank 4, and sedimentation tank 5 receive or exit water through inlets or outlets located near the top. The anaerobic biological denitrification filter column 2 has a pre-temperature constant-temperature outlet 21 on its side wall near the top, which is connected to the constant-temperature water inlet 23 at the bottom of the anaerobic biological denitrification filter column 2 via a self-controlled constant-temperature heater 22. The anaerobic biological denitrification filter column 2 is filled with mixed packing material 24. The bottoms of the A tank 3 and the sedimentation tank 5 are connected by pipelines. The sulfur autotrophic denitrification filter column 6 is filled with sulfur autotrophic denitrification filter media 61 mixed with sulfur autotrophic denitrification bacteria.

[0050] The side wall of the anaerobic biological denitrification filter column 2 is also equipped with a circulating water outlet 25 and a circulating water inlet 26, which are connected by pipelines. The circulating water inlet 26 is located below the circulating water outlet 25. The top of the anaerobic biological denitrification filter column 2 is a three-phase separation zone 27, which is connected to the gas collection chamber 28 outside the anaerobic biological denitrification filter column 2 by pipelines. Tank A 3 is equipped with a stirrer 31 for stirring the liquid in Tank A 3. Tank O 4 is equipped with an aerator 41 for aerating the liquid in Tank O 4.

[0051] A first outlet tank 8 is installed between the outlet of the anaerobic biological denitrification filter column 2 and the inlet of tank A 3; a second outlet tank 9 is installed between the outlet of the sedimentation tank 5 and the inlet of the sulfur autotrophic denitrification filter column 6. In addition, each pipeline is equipped with a corresponding pump device, including an inlet pump, a circulation pump, a return pump, etc., to provide driving force for inlet, circulation, or return.

[0052] In the above-mentioned device, the anaerobic biological denitrification filter column is filled with composite packing material with a particle size of Φ2~7mm and a mixed strain of anaerobic granular sludge and composite anaerobic bacteria. The A / O reaction tank is filled with aerobic activated sludge, and the filling volume is 30% of the effective volume of the reaction tank. The sulfur autotrophic denitrification filter column is filled with sulfur autotrophic filter material with a particle size of Φ3~6mm and sulfur autotrophic denitrification bacteria.

[0053] The degradation process of high-concentration total nitrogen in methanol catalyst production wastewater within an anaerobic biological nitrogen removal filter column mainly involves: under anaerobic / anoxic conditions, denitrifying bacteria reduce nitrite and nitrate to gaseous nitrogen, thereby achieving nitrogen removal. NO2 is generated during the denitrification process. - and NO3 - The transformation is accomplished through assimilation (anabolism) and dissimilation (catabolism) by anaerobic denitrifying bacteria. Assimilation is the process by which NO2 is converted into oxygen. - and NO3 -Nitrogen is assimilated and used in the synthesis of new microbial cells, becoming a component of the cytoplasm. Dissimilation is the process by which NO2 is synthesized. - and NO3 - It is reduced to gaseous substances such as NO, N2O and N2, mainly N2.

[0054] Operating conditions for anaerobic biological denitrification filter column: HRT of the filter column is 20h.

[0055] The methanol catalyst production wastewater treatment processes in the following embodiments are all carried out simultaneously in the above-mentioned special equipment.

[0056] Example 1

[0057] The wastewater quality from methanol catalyst production is as follows: total nitrogen concentration is 1975 mg / L, COD concentration is 63.21 mg / L, and pH is 7.46. Sodium acetate is added to bring the COD in the wastewater to 6011 mg / L, with a C / N ratio of approximately 3:1. The pH of the wastewater is adjusted to 1.5. This wastewater quality is used as the influent, with the influent flow rate and circulation / return flow rate at a 1:1 ratio. The automatically controlled constant temperature heater is turned on to maintain the microbial reaction temperature within the filter column at 25-35℃.

[0058] The startup status was determined by periodically taking influent and effluent samples from the anaerobic biological denitrification filter column, A / O sedimentation tank, and sulfur autotrophic denitrification filter column and conducting water quality tests. The successful startup of the device was confirmed.

[0059] On the fourth day of operation, the anaerobic biological denitrification filter achieved a total nitrogen removal rate of 97% and a COD removal rate of 97% for the methanol catalyst production wastewater. The effluent total nitrogen was 52.13 mg / L, the effluent COD was 205 mg / L, and the effluent pH was 8.35. After passing through the A / O reactor, the effluent total nitrogen was 18.72 mg / L, with a total removal rate of 99.10%, the effluent COD was 24.16 mg / L, with a total removal rate of 99.59%, and the effluent pH was 8.77. Finally, after passing through the sulfur autotrophic denitrification filter, the effluent total nitrogen was 1.22 mg / L, with a total removal rate of 99.94%, the effluent COD was 19.83 mg / L, with a total removal rate of 99.67%, and the effluent pH was 8.42.

[0060] See the trend chart. Figures 2-4 .

[0061] Example 2

[0062] The wastewater from methanol catalyst production had the following characteristics: total nitrogen concentration of 1975 mg / L, COD concentration of 63.21 mg / L, and pH of 7.39. Sodium acetate was added to bring the COD in the wastewater to 6030 mg / L, with a C / N ratio of approximately 3:1. The pH was adjusted to 1.5. This wastewater quality was used as the influent, with an influent flow rate to circulation / return flow rate ratio of 1:1. The microbial reaction temperature within the filter column was maintained at 10–20°C.

[0063] Compared with Example 1, the anaerobic biological denitrification filter column, after 4 days of operation, achieved a total nitrogen removal rate of 79% and a COD removal rate of 89% for methanol catalyst production wastewater. The effluent total nitrogen was 407 mg / L, the effluent COD was 625 mg / L, and the effluent pH was 7.13. After passing through the A / O reaction tank, the effluent total nitrogen was 169 mg / L, with a total removal rate of 91%; the effluent COD was 313 mg / L, with a total removal rate of 95%; and the effluent pH was 7.74. Finally, after passing through the sulfur autotrophic denitrification filter column, the effluent total nitrogen was 128 mg / L, with a total removal rate of 94%; the effluent COD was 251 mg / L, with a total removal rate of 96%; and the effluent pH was 7.53.

[0064] See the trend chart. Figures 5-7 .

[0065] Example 3

[0066] Using only an A / O system to treat methanol catalyst production wastewater

[0067] The wastewater from methanol catalyst production had the following characteristics: total nitrogen concentration of 1975 mg / L, COD concentration of 63.21 mg / L, and pH of 7.39. Sodium acetate was added to bring the COD in the wastewater to 6019 mg / L, with a C / N ratio of approximately 3:1. The pH was adjusted to 1.5. This wastewater quality was used as the influent, with an influent flow rate to return flow rate ratio of 1:1.

[0068] Compared with Example 1, after 4 days of operation, the A / O reactor achieved a total nitrogen removal rate of 52% and a COD removal rate of 53% for the methanol catalyst production wastewater, with effluent total nitrogen of 956 mg / L, effluent COD of 2847 mg / L, and effluent pH of 7.26. On the 10th day, the effluent total nitrogen was 724 mg / L, with a total removal rate of 63%, effluent COD was 2352 mg / L, with a total removal rate of 61%, and effluent pH of 7.63. On the 15th day, the effluent total nitrogen was 383 mg / L, with a total removal rate of 81%, effluent COD was 927 mg / L, with a total removal rate of 85%, and pH of 7.78.

[0069] See the trend chart. Figures 8-10 .

[0070] The above embodiments are the best implementations of the present invention, but the implementations of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for the resource utilization of methanol catalyst production wastewater, characterized in that, The process involves uniformly mixing anaerobic granular sludge, composite anaerobic bacteria and composite packing to form a mixed packing, which is then filled into an anaerobic biological denitrification filter column. The methanol catalyst production wastewater enters the anaerobic biological denitrification filter column from the bottom and undergoes preliminary anaerobic biological denitrification through the mixed packing. Then, the A / O biological denitrification process and the sulfur autotrophic denitrification biological denitrification process are carried out in sequence. The composite filler is a porous material. By weight, the composite filler is mainly composed of 25-35 parts waste minerals, 15-25 parts steel slag, 5-15 parts loofah, 5-15 parts polyurethane, and 25-35 parts trace element mixture, which are prepared by adding an activator and a binder. The trace element mixture contains 5-7 parts by weight of phosphorus, 5-7 parts by weight of potassium, 5-7 parts by weight of magnesium, 5-7 parts by weight of cobalt, and 5-7 parts by weight of zinc. The activator is selected from NaOH, and the binder is selected from epoxy resin adhesive. The composite anaerobic bacteria are mainly composed of the following raw materials in parts by weight: 35-45 samples of *Taurella*, 20-30 samples of *Vibrio azotocinus*, 5-15 samples of *Clostridium*, 5-15 samples of *Microbes*, 5-15 samples of *Bacillus thuringiensis*, and 2-8 samples of *Methylmonas*. The total nitrogen concentration of the methanol catalyst production wastewater is 1900-2100 mg / L, the COD concentration is 60-70 mg / L, and the pH is 7-8. The residence time of the methanol catalyst production wastewater in the anaerobic biological denitrification filter column is 18-22 h. The microbial reaction temperature in the filter column is 25-35℃. Before treating the methanol catalyst production wastewater, sodium acetate is added as a supplementary carbon source to make the COD in the wastewater reach 6000-6200 mg / L, the C / N ratio is (2.5-3.5):1, and the pH of the wastewater is adjusted to 1-2.

2. The method for treating methanol catalyst production wastewater for resource utilization according to claim 1, characterized in that, The composite packing material is filled to 65-70% of the effective volume of the anaerobic biological denitrification filter column, the anaerobic granular sludge is added to 18-22% of the effective volume of the anaerobic biological denitrification filter column, and the composite anaerobic bacteria agent is added to 1.5-2.5% of the effective volume of the anaerobic biological denitrification filter column.

3. The method for treating methanol catalyst production wastewater for resource utilization according to claim 1, characterized in that, The A / O biological denitrification process uses an A / O filter, where the amount of anoxic sludge and aerobic sludge added is 18-22% of the effective volume of the filter, and the total operating retention time is 10-14 hours. The sulfur autotrophic denitrification biological denitrification process uses a sulfur autotrophic denitrification filter column, where the sulfur autotrophic denitrification filter media is filled to 62-70% of the effective volume of the filter column, the amount of sulfur autotrophic denitrification bacteria added is 8-12% of the effective volume, the operating retention time is 4-6 hours, and the microbial reaction temperature inside the filter column is 25-35℃.

Images