CN113292159B - Enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen-containing wig wastewater treatment - Google Patents

Enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen-containing wig wastewater treatment Download PDF

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CN113292159B
CN113292159B CN202110590018.1A CN202110590018A CN113292159B CN 113292159 B CN113292159 B CN 113292159B CN 202110590018 A CN202110590018 A CN 202110590018A CN 113292159 B CN113292159 B CN 113292159B
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李洪静
马军
宋润之
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Qingdao Guanghua Environmental Technology Co ltd
Fudan University
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Fudan University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32

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Abstract

The invention discloses an enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen-containing wig wastewater treatment. The invention relates to a strain of the genus taekeri (a)Thauera sp.) FDN-01 and Paracoccus (Paracoccus sp.) FDN-02 is subjected to amplification culture to prepare a high-efficiency denitrification engineering microbial inoculum, the high-efficiency denitrification engineering microbial inoculum is respectively added into an anoxic tank and a hypoxic tank of a CFBR treatment device, and under the action of various denitrification functional enzymes, high-concentration ammonia nitrogen and total nitrogen in the wig wastewater are intensively removed. The process disclosed by the invention is applied to treating high-concentration ammonia nitrogen in actual wig wastewater, the quality of outlet water stably reaches and is far lower than the A-level limit value of the Water quality Standard for Sewage drainage to cities and towns (GB/T31962-. The invention has no secondary pollution to the environment and has lower treatment cost and energy consumption.

Description

Enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen-containing wig wastewater treatment
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to an enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen-containing wig wastewater treatment.
Background
In recent years, with rapid development of economy and improvement of the living standard of people, wearing wigs has become a fashion. However, a large amount of industrial wastewater containing high ammonia nitrogen is discharged in the wig production process, and if the industrial wastewater is directly discharged without any treatment, serious pollution is caused to the water environment. At present, the denitrification method of industrial wastewater includes physical method, chemical method and biological treatment method. The biological treatment method has gained wide attention due to less investment, simple operation, less secondary pollution and saved operation cost.
The wig industrial wastewater has the characteristics of higher ammonia nitrogen concentration (100 mg/L-500 mg/L), lower COD concentration (100 mg/L-800 mg/L), lower C/N and the like. The traditional biological denitrification technology mainly comprises an A/O process, an SBR process and the like, the concentration of dissolved oxygen in the denitrification process is higher (about 3 mg/L), and the energy consumption is higher; and the sludge age is short (10 d-20 d), and the generated large amount of excess sludge needs to be disposed, so the cost is high. While the traditional biological denitrification technology is applied to the treatment of the wig wastewater containing high ammonia nitrogen, in most cases, the ammonia nitrogen concentration in the effluent water quality can reach the national discharge standard, but the total nitrogen concentration can not reach the A-level limit (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for Sewage discharge into urban sewer (GB/T31962-.
Currently, the most concerned anaerobic ammonia oxidation process developed by the netherlands oxidizes ammonia nitrogen into nitrogen gas by taking the ammonia nitrogen as an electron donor and nitrite nitrogen as an electron acceptor under anaerobic conditions; however, the anaerobic ammonia oxidation process needs to be stabilized at a higher water temperature (30-35 ℃) to perform denitrification, has high energy consumption and cost, and is not suitable for large-scale popularization and application. Plum-winged hair and the like adopt a micro-electrolysis-hydrolytic acidification-nitrification and denitrification process to treat wig production wastewater, and the result of operating for 3 months shows that: when the COD of the inlet water is 1100 mg/L and the ammonia nitrogen is 120 mg/L, the COD and the denitrification effect of the wig production wastewater are good [ Guangzhou chemical industry 2014, volume 42, phase 21, page number 152-154 ]. But the process occupies a large area, has high treatment cost, needs a high C/N ratio, and has the highest concentration of effectively treating ammonia nitrogen of only 120 mg/L. 'A short-cut nitrification-anaerobic ammonia oxidation process for efficiently treating low-carbon high-ammonia nitrogen wastewater' (patent application No. CN201911088445.9, patent publication No. CN 110723817A) applied by Yizhi et al is used for treating industrial wastewater with the C/N ratio of less than 2 and the ammonia nitrogen of 600 mg/L-800 mg/L, has good denitrification effect, does not need to add a carbon source and has low aeration quantity. However, the process flow is long (the anaerobic ammonia oxidation process is arranged before the short-cut nitrification process, an aerobic aeration tank is designed at the tail end of the process), and the energy consumption is very high (the reaction temperatures of the anaerobic ammonia oxidation zone, each short-cut nitrification zone and the nitrification zone are required to be controlled to be 30-40 ℃ respectively, and are preferably 37 ℃).
Therefore, the biological denitrification technology applied to the treatment of the industrial wastewater containing high ammonia nitrogen has the defects of longer process flow, larger occupied area, higher aeration quantity, large carbon source supplement, higher energy consumption and cost and the like. Therefore, the research and development of a novel biological denitrification technology with high efficiency, low energy consumption and low cost are urgently needed to ensure that the quality of the effluent water after the high ammonia nitrogen containing wig wastewater treatment stably reaches the national discharge standard.
Disclosure of Invention
Aiming at the problems of low removal efficiency, high operation cost, high energy consumption and the like of ammonia nitrogen and total nitrogen in high ammonia nitrogen wig wastewater by the traditional biological denitrification technology, the invention aims to provide an enhanced CFBR (circulating fluidized bed reactor) process applied to high ammonia nitrogen wig wastewater treatment, which is safe in operation, high in removal efficiency, low in energy consumption, low in cost and free of secondary pollution to the environment. The method adopts an anoxic-hypoxia Continuous Flow Biofilm Reactor (CFBR Reactor for short) to treat the wig wastewater containing high ammonia nitrogen, and simultaneously adds the high-efficiency denitrification engineering microbial inoculum into the CFBR treatment device; the process running conditions can be automatically controlled according to the quality of the original wig wastewater, the operation is convenient and safe, the ammonia nitrogen and total nitrogen removal efficiency is high, and no secondary pollution is caused to the environment.
The technical scheme of the invention is specifically introduced as follows:
enhanced CFBR (circulating fluidized bed reactor) process applied to high-ammonia-nitrogen-containing wig wastewater treatment, and CFBR treatment device is adopted for treatment
The method comprises the following steps that (1) high-ammonia-nitrogen-containing wig wastewater is treated by a CFBR treatment device which adopts an anoxic tank, a hypoxic tank and a secondary sedimentation tank, wherein the anoxic tank and the hypoxic tank are communicated with each other, and the wig wastewater is firstly subjected to anoxic treatment and then is subjected to hypoxic treatment; respectively adding high-efficiency denitrification engineering bacteria into an anoxic tank and a hypoxic tank of a CFBR treatment device, culturing the high-efficiency denitrification engineering bacteria to become dominant bacteria, intensively removing high-concentration ammonia nitrogen and total nitrogen of the wig wastewater under the action of various denitrification functional enzymes, and allowing the wig wastewater after anoxic-hypoxic treatment to enter a secondary sedimentation tank for sludge-water separation; wherein: the COD concentration of the wig wastewater containing high ammonia nitrogen is 100 mg/L-800 mg/L, the ammonia nitrogen concentration is 50 mg/L-500 mg/L, and the total nitrogen concentration is 50 mg/L-600 mg/L; reaction temperature of anoxic tank and hypoxic tankThe temperature is 4-30 ℃; the efficient denitrifying engineering microbial inoculum is prepared by carrying out amplification culture on a strain FDN-01 or the strain FDN-01 and the strain FDN-02, wherein the strain FDN-01 is a daoeryaThauera sp.), the preservation registration number is CGMCC number 13553; FDN-02 Strain is Paracoccus (Paracoccus sp.), the deposit number is: CGMCC number 22578.
In the invention, a vertical stirrer is arranged in an anoxic tank of the CFBR treatment device, and a filler and an aeration are arranged in the anoxic tank
The filler is selected from one or more of soft filler, semi-soft filler and elastic filler, and the aerator is selected from one or more of a tubular aerator or a disc aerator; a water outlet pipe, a sludge return pipe and a nitrifying liquid return pipe are arranged on the secondary sedimentation tank; the CFBR processing device adopts full-automatic control.
In the invention, activated sludge is inoculated in the anoxic tank and the anoxic tank respectively, the sludge reflux ratio of the sludge age CFBR treatment device is 0-100%, the reflux ratio of nitrifying liquid is 0-100%, and the sludge age is 30-180 d.
In the CFBR processing device, the Dissolved Oxygen (DO) concentration of the anoxic tank is 0.01-0.5 mg/L, and the dissolved oxygen concentration of the anoxic tank is 0.5-1.5 mg/L.
In the present invention, the strain terreus bacterium (A), (B), (C)Thauera sp.) addition of FDN-01 to LB broth or addition of FDN-01 and Paracoccus: (Paracoccus sp.) adding the FDN-02 into an LB liquid culture medium, and carrying out amplification culture in a shaking table for 3-7 d to prepare the high-efficiency denitrification engineering microbial inoculum.
In the invention, the ammonia nitrogen volume removal load of the high ammonia nitrogen-containing wig wastewater is 0.1 kgN/(m)3•d)～3.0 kgN/(m3D), total nitrogen volumetric removal load of 0.1 kgN/(m)3•d)～3.5 kgN/(m3•d)。
In the invention, the COD concentration of the wig wastewater containing high ammonia nitrogen is 100 mg/L-800 mg/L, the ammonia nitrogen concentration is 50 mg/L-500 mg/L, and the total nitrogen concentration is 50 mg/L-600 mg/L. .
In the invention, the reaction temperature of the anoxic tank and the hypoxia tank is 4-30 ℃.
In the invention, the pH value of the wig wastewater containing high ammonia nitrogen is 6.0-8.5.
Compared with the traditional biological denitrification technology applied to wig wastewater treatment, the invention has the beneficial effects that:
(1) the process is applied to treating high-concentration ammonia nitrogen (low COD and C/N ratio, ammonia nitrogen concentration of 50-500 mg/L and wig wastewater with ammonia nitrogen concentration of more than 400 mg/L) in actual wig wastewater), under the mild reaction condition and without additional heating, the removal rate of ammonia nitrogen and total nitrogen in the wig wastewater is high, the removal rate of ammonia nitrogen is over 95 percent, the quality of effluent water stably reaches and is far lower than the A-level limit (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the wastewater discharge town sewer water quality standard 962 (GB/T312015), the treatment cost and the energy consumption are both low, and no secondary pollution is caused to the environment.
(2) The enhanced CFBR technology adds the high-efficiency denitrification engineering bacteria, cultures the high-efficiency denitrification engineering bacteria to become dominant bacteria, and greatly improves the removal efficiency of ammonia nitrogen and total nitrogen in the high-ammonia nitrogen containing wig wastewater under the action of various denitrification functional enzymes.
(3) The enhanced CFBR process adopts an anoxic-hypoxic process operation condition, the structural design of the treatment device is novel, and the treatment cost and energy consumption of the high ammonia nitrogen containing wig wastewater are greatly reduced. The enhanced CFBR process adopts full-automatic control, and is convenient and safe to operate.
Drawings
FIG. 1 is a schematic diagram of a "CFBR treating apparatus" according to the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.
In the embodiment, adopt "CFBR processing apparatus" of autonomic design to handle the wig waste water that contains high ammonia-nitrogen concentration, the concrete structure description is as follows:
the box body of the CFBR treatment device is a cuboid and is made of carbon steel for corrosion prevention, and is divided into 3 treatment tanks by partition plates, wherein the treatment tanks comprise 1 anoxic tank, 1 anoxic tank and 1 secondary sedimentation tank; the anoxic tank and the low-oxygen tank are communicated with each other through the opening on the partition plate, and the wig wastewater is subjected to anoxic treatment and then to low-oxygen treatment; the wig wastewater after the anoxic-hypoxic treatment enters a secondary sedimentation tank for sludge-water separation, and the secondary sedimentation tank is provided with a water outlet pipe, a sludge return pipe and a nitrification liquid return pipe; the anoxic tank is internally provided with a vertical stirrer, the anoxic tank is internally provided with a filler and an aerator, the filler is selected from one or more of soft filler, semi-soft filler and elastic filler, and the aerator is selected from one or more of a tubular aerator or a disc aerator. The CFBR processing device adopts full-automatic control, is convenient and safe to operate and has no secondary pollution.
In the embodiment, an enhanced CFBR (circulating fluidized bed reactor) process applied to treatment of wig wastewater containing high ammonia nitrogen is provided, an online dissolved oxygen meter is adopted to automatically control the dissolved oxygen concentration of an anoxic tank and a hypoxic tank, an efficient denitrification engineering microbial inoculum prepared by expanded culture of FDN-01 and FDN-02 bacterial strains is added, the efficient denitrification engineering microbial inoculum is cultured to become dominant bacteria under the anoxic-hypoxic condition, and enhanced denitrification treatment is carried out on the wig wastewater under the action of various efficient denitrification functional enzymes. Wherein: the FDN-01 strain was classified and named as genus terreus (R) ((R))Thauerasp.), classification of FDN-02 strain was named Paracoccus (Paracoccus sp.), are newly discovered strains, and can efficiently remove ammonia nitrogen and total nitrogen; daoerlia bacterium (A), (B), (C, B), (C, B, C, B, C, B, and C, BThauerasp.) the Genbank Sequence _ ID of the FDN-01 strain is KY393097, which has been deposited with the China general microbiological culture Collection center, abbreviated as: CGMCC; the address is as follows: xilu No. 1 Hospital No. 3, Beijing, Chaoyang, North; the preservation number is: CGMCC number 13553; paracoccus (A), (B)Paracoccus sp.) the Genbank Sequence _ ID of the FDN-02 strain is MW652628, which has been deposited with the China general microbiological culture Collection center, abbreviated as: CGMCC; the address is as follows: xilu No. 1 Hospital No. 3, Beijing, Chaoyang, North; the preservation number is: CGMCC number 22578, the preservation date is: 21/5/2021.
In the embodiment, the preparation method of the high-efficiency denitrification engineering bacteria agent comprises the following steps: and adding the FDN-01 strain into an LB liquid culture medium, or adding the FDN-01 and FDN-02 strains into the LB liquid culture medium, and culturing for 3 d-7 d in a shaking table to prepare the high-efficiency denitrification engineering microbial inoculum.
Example 1
In this example, the FDN-01 and FDN-02 strains were inoculated into LB liquid medium, and after carrying out amplification culture in a shaker for 3 days, the efficient denitrification engineering bacteria was prepared. The water volume of the wig wastewater containing high ammonia nitrogen is 8 m3The water temperature is 25 ℃, the pH value is 8.1, the COD initial concentration is 386 mg/L, the ammonia nitrogen initial concentration is 480 mg/L, the nitrate nitrogen initial concentration is 59 mg/L, the nitrite nitrogen initial concentration is 0.6 mg/L, and the total nitrogen initial concentration is 600 mg/L. 2000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the concentration of MLSS is about 3000 mg/L. After the activated sludge in the anoxic tank and the low-oxygen tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (the DO concentration is 0.2 mg/L) in the CFBR processing device by a water inlet pump, the treated effluent of the anoxic tank enters the low-oxygen tank (the DO concentration is 1.0 mg/L) for processing, and after mud-water separation is carried out in a secondary sedimentation tank, supernatant is discharged.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 3.0 kgN/(m)3D) total nitrogen volumetric removal load of 3.5 kgN/(m)3D). The effluent quality indexes of the wig wastewater which runs stably after being treated by the enhanced CFBR process are as follows: the COD concentration is 123 mg/L, the ammonia nitrogen concentration is 0 mg/L, the nitrate nitrogen concentration is 3.0 mg/L, the nitrite nitrogen concentration is 0.1 mg/L, the total nitrogen concentration is 3.2 mg/L, and the pH value is 8.3. The COD removal rate is 68 percent, the ammonia nitrogen removal rate reaches 100 percent, and the total nitrogen removal rate is 99.5 percent. The water quality of the outlet water after the wig wastewater treatment not only stably reaches and is far lower than the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into urban sewer (GB/T31962-.
Example 2
In this example, the FDN-01 and FDN-02 strains were inoculated into LB liquid medium, and after carrying out amplification culture in a shaker for 3 days, the efficient denitrification engineering bacteria was prepared. The water amount of the wig wastewater containing high ammonia nitrogen is 5.5 m3The water temperature is 18 ℃, the pH value is 7.4, the COD initial concentration is 858 mg/L, the ammonia nitrogen initial concentration is 262 mg/L, and the nitrate nitrogen initial concentration is 22 mg/LThe initial concentration of nitrite nitrogen was 0.35 mg/L and the initial concentration of total nitrogen was 309 mg/L. 2000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the concentration of MLSS is about 2800 mg/L. After the activated sludge in the anoxic tank and the low-oxygen tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (the DO concentration is 0.1 mg/L) in the CFBR treatment device by a water inlet pump, the treated effluent of the anoxic tank enters the low-oxygen tank (the DO concentration is 0.5 mg/L) for treatment, and after mud-water separation is carried out in a secondary sedimentation tank, supernatant is discharged.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 1.0 kgN/(m)3D) total nitrogen volumetric removal load of 1.2 kgN/(m)3D). The effluent quality indexes of the wig wastewater which runs stably after being treated by the enhanced CFBR process are as follows: the COD concentration is 113 mg/L, the ammonia nitrogen concentration is 0.3 mg/L, the nitrate nitrogen concentration is 14 mg/L, the nitrite nitrogen concentration is 0.26 mg/L, the total nitrogen concentration is 20 mg/L, and the pH value is 8.0. The COD removal rate is 87%, the ammonia nitrogen removal rate reaches 99.9%, and the total nitrogen removal rate is 93.5%. The water quality of the outlet water after the wig wastewater treatment not only stably reaches and is far lower than the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into urban sewer (GB/T31962-.
Example 3
In this example, the FDN-02 strain was inoculated into LB liquid medium, and after carrying out expanded culture in a shaker for 7 days, an efficient denitrification engineering bacterial agent was prepared. The water amount of the wig wastewater containing high ammonia nitrogen is 2.0 m3The water temperature is 4 ℃, the pH value is 6.0, the COD initial concentration is 184 mg/L, the ammonia nitrogen initial concentration is 123 mg/L, the nitrate nitrogen initial concentration is 38 mg/L, the nitrite nitrogen initial concentration is 15.6 mg/L, and the total nitrogen initial concentration is 190 mg/L. 1000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the concentration of MLSS is about 2500 mg/L. After the activated sludge in the anoxic tank and the hypoxia tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (DO concentration is 0.5 mg/L) in the CFBR treatment device by the water inlet pump, and the treated effluent in the anoxic tank enters the hypoxia tank (DO)Concentration of 1.5 mg/L), and after mud-water separation in a secondary sedimentation tank, discharging the supernatant.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 0.1 kgN/(m)3D), total nitrogen volumetric removal load of 0.1 kgN/(m)3D). The effluent quality indexes of the wig wastewater which runs stably after being treated by the enhanced CFBR process are as follows: the COD concentration is 80 mg/L, the ammonia nitrogen concentration is 5.2 mg/L, the nitrate nitrogen concentration is 35 mg/L, the nitrite nitrogen concentration is 0.9 mg/L, the total nitrogen concentration is 45 mg/L, and the pH value is 7.2. The ammonia nitrogen removal rate is 95.8%, and the total nitrogen removal rate is 76%. The quality of the effluent after the wig wastewater treatment stably reaches the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into town sewer 2015 (GB/T31962-.
Example 4
In this example, the FDN-02 strain was inoculated into LB liquid medium, and after carrying out expanded culture in a shaker for 7 days, an efficient denitrification engineering bacterial agent was prepared. The water volume of the wig wastewater containing high ammonia nitrogen is 8 m3The water temperature is 30 ℃, the pH value is 8.1, the COD initial concentration is 152 mg/L, the ammonia nitrogen initial concentration is 115.5 mg/L, the nitrate nitrogen initial concentration is 32 mg/L, the nitrite nitrogen initial concentration is 0.5 mg/L, and the total nitrogen initial concentration is 164 mg/L. 1000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the concentration of MLSS is about 2500 mg/L. After the activated sludge in the anoxic tank and the low-oxygen tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (the DO concentration is 0.4 mg/L) in the CFBR treatment device by a water inlet pump, the treated effluent of the anoxic tank enters the low-oxygen tank (the DO concentration is 0.8 mg/L) for treatment, and after mud-water separation is carried out in a secondary sedimentation tank, supernatant is discharged.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 0.7 kgN/(m)3D), total nitrogen volumetric removal load of 0.8 kgN/(m)3D). The effluent quality indexes of the wig wastewater which runs stably after being treated by the enhanced CFBR process are as follows: COD concentration is 104 mg/L, ammonia nitrogen concentration is 0.2 mg/L, nitrate nitrogen concentration is 20 mg/L, nitrite nitrogen concentration is0.4 mg/L, a total nitrogen concentration of 33 mg/L and a pH of 7.3. The ammonia nitrogen removal rate reaches 99.8 percent, and the total nitrogen removal rate is 80 percent. The quality of the effluent after the wig wastewater treatment stably reaches the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into town sewer 2015 (GB/T31962-.
Example 5
In this example, the FDN-01 strain was inoculated into LB liquid medium, and after carrying out expanded culture for 5 days in a shaker, an efficient denitrification engineering bacterial agent was prepared. The water amount of the wig wastewater containing high ammonia nitrogen is 4 m3The water temperature is 15 ℃, the pH value is 8.2, the COD initial concentration is 434 mg/L, the ammonia nitrogen initial concentration is 286 mg/L, the nitrate nitrogen initial concentration is 49 mg/L, the nitrite nitrogen initial concentration is 3.2 mg/L, and the total nitrogen initial concentration is 360 mg/L. 2000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the MLSS concentration is about 2600 mg/L. After the activated sludge in the anoxic tank and the low-oxygen tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (the DO concentration is 0.3 mg/L) in the CFBR treatment device by a water inlet pump, the treated effluent of the anoxic tank enters the low-oxygen tank (the DO concentration is 1.3 mg/L) for treatment, and after mud-water separation is carried out in a secondary sedimentation tank, supernatant is discharged.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 0.6 kgN/(m)3D) total nitrogen volumetric removal load of 0.6 kgN/(m)3D). The water quality indexes of the wig wastewater which runs stably after being treated by the pilot plant of the enhanced CFBR process are as follows: the COD concentration is 125 mg/L, the ammonia nitrogen concentration is 5 mg/L, the nitrate nitrogen concentration is 21 mg/L, the nitrite nitrogen concentration is 0.1 mg/L, the total nitrogen concentration is 35 mg/L, and the pH value is 7.6. The COD removal rate is 71%, the ammonia nitrogen removal rate is 98%, and the total nitrogen removal rate is 90%. The quality of the effluent after the wig wastewater treatment stably reaches the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into town sewer 2015 (GB/T31962-.
Example 6
In this example, the FDN-01 and FDN-02 strains were inoculated into LB liquid cultureAnd performing expanded culture on the medium in a shaking table for 5 days to prepare the high-efficiency denitrification engineering microbial inoculum. The water amount of the wig wastewater containing high ammonia nitrogen is 5 m3And d, the water temperature is 12 ℃, the pH value is 8.5, the COD initial concentration is 337 mg/L, the ammonia nitrogen initial concentration is 333 mg/L, the nitrate nitrogen initial concentration is 42 mg/L, the nitrite nitrogen initial concentration is 1.1 mg/L, and the total nitrogen initial concentration is 393 mg/L. 2000 mL of high-efficiency denitrification engineering bacteria agent is respectively added into an anoxic tank and a hypoxic tank of the CFBR treatment device, and the MLSS concentration is about 2600 mg/L. After the activated sludge in the anoxic tank and the low-oxygen tank and the efficient denitrification engineering bacteria agent are cultured together for 7 d, the wig wastewater is pumped into the anoxic tank (the DO concentration is 0.01 mg/L) in the CFBR processing device by a water inlet pump, the treated effluent of the anoxic tank enters the low-oxygen tank (the DO concentration is 1.2 mg/L) for processing, and after mud-water separation is carried out in a secondary sedimentation tank, supernatant is discharged.
The ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is 1.3 kgN/(m)3D) total nitrogen volumetric removal load of 1.5 kgN/(m)3D). The water quality indexes of the wig wastewater which runs stably after being treated by the pilot plant of the enhanced CFBR process are as follows: the COD concentration is 114 mg/L, the ammonia nitrogen concentration is 0.2 mg/L, the nitrate nitrogen concentration is 14 mg/L, the nitrite nitrogen concentration is 0.1 mg/L, the total nitrogen concentration is 17.7 mg/L, and the pH value is 7.9. The COD removal rate is 66%, the ammonia nitrogen removal rate reaches 99.9%, and the total nitrogen removal rate is 95.5%. The quality of the effluent after the wig wastewater treatment stably reaches the A-level limit value (COD is less than or equal to 500 mg/L, ammonia nitrogen is less than or equal to 45 mg/L, and total nitrogen is less than or equal to 70 mg/L) of the Water quality Standard for wastewater discharge into town sewer 2015 (GB/T31962-.

Claims (7)

1. An enhanced CFBR (circulating fluidized bed reactor) process applied to high-ammonia-nitrogen containing wig wastewater treatment is characterized in that a CFBR treatment device is adopted to treat high-ammonia-nitrogen containing wig wastewater, the CFBR treatment device comprises an anoxic tank, a hypoxic tank and a secondary sedimentation tank, the anoxic tank and the hypoxic tank are mutually communicated, and the wig wastewater is subjected to anoxic treatment and then hypoxic treatment; respectively adding high-efficiency denitrification engineering bacteria into an anoxic tank and a hypoxic tank of a CFBR treatment device, culturing the high-efficiency denitrification engineering bacteria to become dominant bacteria, and strongly treating the dominant bacteria under the action of various denitrification functional enzymesHigh-concentration ammonia nitrogen and total nitrogen in the wig wastewater are removed in a chemical manner, and the wig wastewater after being subjected to anoxic-hypoxic treatment enters a secondary sedimentation tank for sludge-water separation; wherein: the COD concentration of the wig wastewater containing high ammonia nitrogen is 100 mg/L-800 mg/L, the ammonia nitrogen concentration is 50 mg/L-500 mg/L, and the total nitrogen concentration is 50 mg/L-600 mg/L; the reaction temperature of the anoxic tank and the hypoxic tank is 4-30 ℃; the efficient denitrifying engineering microbial inoculum is prepared by carrying out amplification culture on a strain FDN-01 and a strain FDN-02, wherein the strain FDN-01 is a daoerya bacterium (FDN-01)Thauera sp.), the preservation registration number is CGMCC number 13553; FDN-02 Strain is Paracoccus (Paracoccus sp.), and the preservation registration number is CGMCC number 22578.
2. The process of claim 1, wherein a vertical mixer is installed in the anoxic tank of the CFBR treating apparatus,
the low-oxygen tank is provided with a filler and an aerator, the filler is selected from one or more of soft filler, semi-soft filler and elastic filler, and the aerator is selected from one or more of a tubular aerator or a disc aerator; a water outlet pipe, a sludge return pipe and a nitrifying liquid return pipe are arranged on the secondary sedimentation tank; the CFBR processing device adopts full-automatic control.
3. The process according to claim 2, wherein the anoxic tank and the anoxic tank are inoculated with activated sludge and sewage, respectively
The mud age is 30-180 days; the sludge reflux ratio of the CFBR treatment device is 0-100%, and the nitrifying liquid reflux ratio is 0-100%.
4. The process of claim 1, wherein the anoxic tank in the CFBR treatment apparatus has a dissolved oxygen concentration of
0.01 mg/L to 0.5 mg/L, and the dissolved oxygen concentration of the hypoxia bath is 0.5 mg/L to 1.5 mg/L.
5. The process according to claim 1, characterized in that the strain daurella (a), (b) or (c) isThauera sp.) FDN-01 and Paracoccus (Paracoccus: (S)Paracoccus sp.) FDN-02 was added to LB liquid medium and carried out in a shakerAnd performing expanded culture for 3-7 days to prepare the high-efficiency denitrification engineering bacteria.
6. The process as claimed in claim 1, wherein the ammonia nitrogen volume removal load of the wig wastewater containing high ammonia nitrogen is
0.1 kgN/(m3•d)～3.0 kgN/(m3D), total nitrogen volumetric removal load of 0.1 kgN/(m)3•d)～3.5 kgN/(m3•d)。
7. The process according to claim 1, wherein the pH value of the wig wastewater containing ammonia nitrogen is 6.0-8.5.
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