CN113526790A - Anaerobic remediation system and treatment method for mine wastewater - Google Patents
Anaerobic remediation system and treatment method for mine wastewater Download PDFInfo
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F3/28—Anaerobic digestion processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses an anaerobic remediation system and a treatment method for mine wastewater, wherein the system comprises a remediation system tank body, a primary activated carbon filter tank, a secondary bentonite-dolomite adsorption tank, a biological reaction tank, a zeolite filler tank and the like, wherein the upper part of the primary activated carbon filter tank, the lower part of the biological reaction tank and the upper part of a zeolite settling zone are connected with a water inlet pipe, the upper part of the biological reaction tank is connected with an emptying valve, the upper part of the tail end of the zeolite settling zone is connected with a water outlet pipe, the lower part of the zeolite settling zone is connected with an emptying valve, a liquid spraying sulfate pipe is connected with reducing bacteria liquid, and a gas spraying pipe is connected with nitrogen; the restoration principle is that the primary activated carbon tank filters suspended matters in mine wastewater, the secondary bentonite-dolomite tank adsorbs heavy metal ions in the wastewater and adjusts the pH value to finish pretreatment, the biological reaction tank adsorbs and enriches the heavy metal ions and provides a carbon source for SRB, the up-flow nitrogen diffusion device accelerates the mass transfer of the SRB and the wastewater while forming an anaerobic condition, and the zeolite settling zone filters metal precipitates to finish deep treatment.
Description
Technical Field
The invention belongs to the technical field of environmental protection and mine restoration, and particularly relates to an anaerobic restoration system and a treatment method for mine wastewater.
Background
In recent years, industrial wastewater generated by mining and processing of mineral resources in China is increasing, mine acidic wastewater is rich in heavy metal ions and suspended substances with higher concentration, and if the mine acidic wastewater is directly discharged without treatment, the acidic substances in the mine acidic wastewater have destructive effects on ecological systems of soil and water. Heavy metal ions have great threats to aquatic environment, agriculture and human health due to toxicity and carcinogenic effect, and have important significance in harmless treatment of acid mine wastewater.
The existing commonly used acid mine wastewater treatment technology comprises a physical method, a chemical method and a biochemical method, wherein the physical method relates to an ion exchange method, an adsorption method and the like, the operation is simple and convenient, the chemical method is mainly a neutralization method, heavy metals are converted into hydroxide precipitates and removed by adding a neutralizing agent, the biological method can be divided into a microbiological method and an artificial wetland method, the heavy metals are removed by utilizing the oxidation action of microorganisms, and the heavy metals are harmlessly treated by utilizing the respiration action of a soil-plant-microorganism ecosystem and the physicochemical action of a water body and a matrix, but the problems of large occupied area, high maintenance cost and the like exist. How to effectively combine passive repair and active repair is of great importance in searching for a mine wastewater treatment technology with low environmental impact, low maintenance cost, short treatment period and strong pertinence.
Disclosure of Invention
In view of the above, the present invention aims to provide an anaerobic remediation system and a treatment method for mine wastewater, so as to solve the deficiencies in the prior art, in order to solve the problems that the traditional mine wastewater is difficult to treat, and the maintenance cost and the balance during the treatment period cannot be realized.
In order to achieve the purpose, the invention is realized by the following technical scheme:
on the one hand, the anaerobic remediation system for mine wastewater comprises an anaerobic remediation system main body, wherein the anaerobic remediation system main body comprises a remediation system tank body, a primary activated carbon filter tank, a secondary bentonite-dolomite adsorption tank, a biological reaction tank, a zeolite filler tank, a liquid spray pipe, a gas spray pipe and an emptying valve, the primary activated carbon filter tank, the secondary bentonite-dolomite adsorption tank, the biological reaction tank and the zeolite filler tank are sequentially connected, the upper part of the primary activated carbon filter tank, the lower part of the biological reaction tank and the upper part of the zeolite filler tank are respectively connected with a water inlet pipe, the upper part of the biological reaction tank is connected with the emptying valve, the upper part of the terminal of the zeolite filler tank is connected with a water outlet pipe, the lower part of the terminal of the zeolite filler tank is connected with the emptying valve, and the water inlet pipe on the primary activated carbon filter tank is connected with the emptying valve, And flowmeters are respectively arranged on the water outlet pipe on the zeolite packing pool, the liquid spray pipe and the gas spray pipe.
The anaerobic remediation system for mine wastewater is characterized in that the main body of the anaerobic remediation system is closed.
The anaerobic remediation system for mine wastewater comprises a primary activated carbon filter tank and a secondary bentonite-dolomite adsorption tank which are separated by a stainless steel dense net of 80 meshes, and the left side and the right side of a biological reaction tank are separated by solid partition plates to form layered partition plates.
The anaerobic remediation system for mine wastewater comprises a liquid spray pipe, a sulfate reducing bacteria liquid, a gas spray pipe and a nitrogen source, wherein the liquid spray pipe is located at the bottom of a biological reaction tank and close to a water inlet, one end of the liquid spray pipe is connected with the sulfate reducing bacteria liquid, the gas spray pipe is located at the central part of the bottom of the biological reaction tank, and one end of the gas spray pipe is connected with the nitrogen source.
According to the anaerobic remediation system for mine wastewater, the blending mass ratio of bentonite and dolomite in the secondary bentonite-dolomite adsorption tank is 2:1-4:1, and the bentonite-dolomite mixed filter material with the grain size of about 1.5mm is filled in the secondary bentonite-dolomite adsorption tank after granulation.
According to the anaerobic remediation system for mine wastewater, the particle size of zeolite in the zeolite filler pond is 2.5-5.0 mm.
According to the anaerobic remediation system for mine wastewater, the biological filler in the biological reaction tank is dried bagasse, straw and corncob in a volume ratio of 1:1:4-1:1:8, the corncob is cylindrical and is filled in layers with a filling density of 70%, and the biological filler filled between the layered partition plates is the bagasse and straw placed in a PET fiber dense mesh bag.
According to the anaerobic remediation system for mine wastewater, the retention time of the secondary bentonite-dolomite adsorption tank is 4-8 hours, and the retention time of the biological reaction tank is 48-120 hours.
In another aspect, a treatment method of an anaerobic remediation system for mine wastewater is provided, which comprises the following steps:
the method comprises the following steps: designing the size and the retention time of each unit of the remediation system, the water inlet and outlet flow, the SRB remediation bacteria liquid flow and the gas flow parameters according to the pollution characteristics of the mine wastewater, connecting the water inlet of the remediation system with the mine wastewater to be treated, checking the connection tightness of each interface, setting flow and pressure monitoring control values, and opening a water inlet pipe;
step two: after the water inflow of the biological reaction tank exceeds about 1/3 volume of the biological reaction tank, simultaneously opening a gas spray pipe and a liquid spray pipe for water inflow and gas inflow, and opening a gas emptying valve to be externally connected with a waste gas collecting device through a waste gas collecting port;
step three: opening a water outlet of the anaerobic remediation system to effectively collect and treat the effluent;
step four: after the repair is finished, closing a water inlet and a liquid spray pipe of the biological reaction tank, removing the gas spray pipe and connecting the gas spray pipe with a collecting tank after all waste gas is discharged, and collecting residual waste water in the biological reaction tank;
step five: when back washing is needed, the directions of back washing water flow are respectively a zeolite filling pool, a biological reaction pool, a secondary bentonite-dolomite adsorption pool and a primary activated carbon filter pool; firstly, a water outlet pipe of an anaerobic remediation system is opened to be connected with a backwashing water source for reverse water inflow, a gas emptying valve above a biological reaction tank is connected with backwashing water source for reverse water inflow, a liquid spray pipe is closed, the gas spray pipe is removed and connected with a collecting tank, backwashing wastewater and sediments are collected, and a water inlet pipe of the anaerobic remediation system is connected with a backwashing water outlet collecting device.
The technical scheme of the invention has the beneficial effects that:
the primary activated carbon pool filters suspended matters in the mine wastewater and reduces the pollution load of the wastewater; the secondary bentonite-dolomite pool adsorbs heavy metal ions in the wastewater and adjusts the pH value to finish pretreatment, the initial concentration of the heavy metal in the wastewater is effectively reduced through the two-stage adsorption pool, the toxic action of the heavy metal on a subsequent biological agent is greatly reduced, the concentration of suspended matters in the wastewater is effectively reduced through the two-stage adsorption pool, the reaction flow state and the contact specific surface area in the biological reaction pool are optimized and improved, and the biodegradation efficiency is improved; the biological reaction tank further adsorbs and enriches heavy metal ions and provides a carbon source for the SRB, so that the treatment activity and survival time of the SRB flora are increased; the up-flow nitrogen diffusion device is arranged at the downstream of the SRB water inlet, so that the mass transfer of the SRB and the wastewater is accelerated while an anaerobic condition is formed, and the sedimentation and sedimentation are prevented; and filtering the metal precipitate by using a zeolite filler tank to finish the advanced treatment.
Drawings
To further illustrate the above objects, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1a is a schematic diagram of the operation of the mine wastewater anaerobic remediation system of the constituent units of the present invention;
FIG. 1b is a schematic diagram of the backwashing of the anaerobic mine wastewater remediation system of the present invention;
FIG. 2a is an elevation view of a bioreactor according to the present invention;
FIG. 2b is a sectional view of the bioreactor A-A according to the present invention;
in the figure: 1. a primary activated carbon filter tank; 2. a second-stage bentonite-dolomite adsorption tank; 3. a biological reaction tank; 4. a zeolite packing pond; 5. biological fillers in the biological reaction tank; 6. biological fillers between the layered baffles; 7. a layered partition plate; 8. a water outlet; 9. an exhaust gas collection port; 10. a liquid spray pipe; 11. a gas shower; 12. a water inlet.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1a, fig. 1b, fig. 2a and fig. 2b, the anaerobic remediation system for mine wastewater of the present invention comprises an anaerobic remediation system main body, the anaerobic remediation system main body comprises a remediation system tank body, a primary activated carbon filtration tank 1, a secondary bentonite-dolomite adsorption tank 2, a biological reaction tank 3, a zeolite filler tank 4, a liquid spray pipe 10(SRB bacteria liquid inlet), a gas spray pipe 11 (nitrogen inlet) and an emptying valve, the primary activated carbon filtration tank 1, the secondary bentonite-dolomite adsorption tank 2, the biological reaction tank 3 and the zeolite filler tank 4 are connected in sequence, the upper part of the primary activated carbon filtration tank 1, the lower part of the biological reaction tank 3 and the upper part of the zeolite filler tank 4 are respectively connected with a water inlet pipe, the upper part of the biological reaction tank 3 is connected with an emptying valve, the upper end part of the zeolite filler tank 4 is connected with a water outlet pipe, and the lower end part of the zeolite filler tank 4 is connected with an emptying valve, flow meters are respectively arranged on a water inlet pipe on the primary activated carbon filter tank 1, a water outlet pipe on the zeolite filler tank 4, a liquid spray pipe 10 and a gas spray pipe 11.
In a preferred embodiment of the invention, the anaerobic remediation system body is closed.
The primary activated carbon filter tank 1 and the secondary bentonite-dolomite adsorption tank 2 are separated by a stainless steel dense net with 80 meshes, and the left side and the right side of the biological reaction tank 3 are separated by solid clapboards to form a layered clapboard 7.
The liquid spray pipe 10 is positioned at the bottom of the biological reaction tank 3 and is close to the water inlet 12, one end of the liquid spray pipe 10 is connected with sulfate reducing bacteria liquid, the gas spray pipe 11 is positioned at the central part of the bottom of the biological reaction tank 3, and one end of the gas spray pipe 11 is connected with a nitrogen source.
The blending mass ratio of the bentonite and the dolomite in the second-stage bentonite-dolomite adsorption tank 2 is 2:1-4:1, and the bentonite-dolomite mixed filter material with the grain diameter of about 1.5mm is filled in the second-stage bentonite-dolomite adsorption tank 2 after granulation.
The zeolite grain diameter in the zeolite filler pool 4 is 2.5-5.0 mm.
The biological filler 5 in the biological reaction tank 3 is dried bagasse, straw and corncob in a volume ratio of 1:1:4-1:1:8, the corncob is cylindrical and is filled in layers with a filling density of 70%, and the biological filler 6 filled between the layered partition plates 7 is the bagasse and straw placed in a PET fiber dense mesh bag.
The retention time of the second-stage bentonite-dolomite adsorption tank 2 is 4-8h, and the retention time of the biological reaction tank 3 is 48-120 h.
The treatment method of the anaerobic remediation system for mine wastewater comprises the following steps:
the method comprises the following steps: designing parameters such as the size and the retention time of each unit, the water inlet and outlet flow, the SRB repair bacteria liquid flow, the gas flow and the like of the repair system according to the pollution characteristics of the mine wastewater, connecting a water inlet of the repair system with the mine wastewater to be treated, checking the connection tightness of each interface, setting flow and pressure monitoring control values, and opening a water inlet pipe;
step two: after the water inflow of the biological reaction tank 3 exceeds about 1/3 of the volume of the biological reaction tank, simultaneously opening a gas spray pipe 11 and a liquid spray pipe 10 for water inflow and gas inflow, and opening a gas emptying valve to be externally connected with a waste gas collecting device through a waste gas collecting port 9;
step three: opening a water outlet 8 of the anaerobic remediation system to effectively collect and treat the effluent;
step four: after the repair is finished, closing the water inlet 12 and the liquid spray pipe 10 of the biological reaction tank 3, removing the gas spray pipe 11 and connecting with the collecting tank after all the waste gas is discharged, and collecting the residual waste water in the biological reaction tank 3;
step five: when back washing is needed, the directions of back washing water flow are respectively a zeolite filling tank 4, a biological reaction tank 3, a secondary bentonite-dolomite adsorption tank 2 and a primary activated carbon filter tank 1; firstly, a water outlet pipe of an anaerobic remediation system is opened to be connected with a backwashing water source for reverse water inflow, a gas emptying valve above a biological reaction tank 3 is connected with backwashing water source for reverse water inflow, a liquid spray pipe 10 is closed, a gas spray pipe 11 is removed and connected with a collecting tank, backwashing wastewater and sediments are collected, and a water inlet pipe of the anaerobic remediation system is connected with a backwashing water outlet collecting device.
In the preferred embodiment of the invention, the SRB bacterial liquid required by the system is cultured, and the steps are as follows:
an up-flow anaerobic sludge bed reactor with the working volume of 10L and the hydraulic retention time of 1d is constructed, and the water inlet components and the concentration are as follows: na (Na)2SO4And C3H5O3Na (3g/L), and the other components are respectively (0.1 g/L): n is a radical ofH4Cl、CaCl2、MgSO4·7H2O and K2HPO4·3H2And O. The pH of the feed water was adjusted to 8.0 by adding 1.5g/L baking soda. In addition, 1mL of trace element liquid is added into each liter of water to meet the normal growth requirement of the microorganisms. The trace element liquid comprises the following components: 500mg/L H3BO3、ZnCl2、 (NH4)6Mo7O24·4H2O、NiCl·6H2O、AlCl3·6H2O、CoCl2·6H2O and CuSO4·5H2O， 1000mg/L Na2SeO3·5H2O，1500mg/L FeCl3·6H2O，5000mg/L MnCl2·4H2O and 5 mL/L37% HCl solution. The inoculated sludge is the residual sludge of a secondary sedimentation tank of a certain municipal sewage plant, and the initial concentration MLSS of the inoculated sludge is 30000 mg/L. The substrate concentration of the inlet water in the startup and operation stages of the reactor is 1000mg/L sulfate and 3000mg COD. The reactor is successfully started after running for 30 days, the concentration of the sulfate radical in the effluent is stabilized below 50mg/L, and the concentration of the sulfur ion is higher than 200 mg/L. At this time, the sludge in the reactor is taken out, centrifuged for 5min, and added with phosphoric acid buffer solution to remove impurities, thus obtaining the mixed SRB flora. And (3) culturing the SRB by adopting a 500mL serum bottle, adding a culture solution with the same components as the water quality of the inlet water, continuously introducing high-purity nitrogen for 15min, and quickly covering a rubber plug after the aeration is finished so as to avoid air interference. Placing the SRB in a shaking table for shaking culture at the temperature of 35 ℃ and the rotation speed of 150 r/min.
In this example, an anaerobic remediation device for mine wastewater is constructed, in which organic glass is used as a reactor shell, the length × width × height of a primary activated carbon filtration tank is 30cm × 050cm × 150cm, the length × 2 width × 3 height of a secondary bentonite-dolomite adsorption tank is 80cm × 450cm × 550cm, the length × width × height of a biological reaction tank is 50cm × 50cm × 50cm, the lengths are divided into an upper layer, a middle layer and a lower layer, and the length × width × height of a zeolite packing tank is 100cm × 50cm × 50 cm. The water inlet load of the device of the embodiment is about 0.6m3(d) the repairing object is certain mine wastewater with the pH value of 5.15 and SO4 2-2577.1 mg/L concentration, 105.1mg/L concentration of Fe in metal ions, 27.9mg/L concentration of Mn, 363.3. mu.g/L concentration of Cu, 705. mu.g/L concentration of Zn, nitrogenAir flow of 70m3H, the water inlet flow of SRB bacterial liquid is 0.06m3And d. Collecting the tail end effluent and detecting, wherein the pH value of the effluent is 6.82 and SO4 2-The concentration is 1087.31mg/L, the concentration of Fe in metal ions is 6.9mg/L, the concentration of Mn is 1.6mg/L, the concentration of Cu is 92.6 mu g/L, and the concentration of Zn is 181.5 mu g/L.
The technical scheme of the invention has the beneficial effects that:
the primary activated carbon pool filters suspended matters in the mine wastewater and reduces the pollution load of the wastewater; the secondary bentonite-dolomite pool adsorbs heavy metal ions in the wastewater and adjusts the pH value to finish pretreatment, the initial concentration of the heavy metal in the wastewater is effectively reduced through the two-stage adsorption pool, the toxic action of the heavy metal on a subsequent biological agent is greatly reduced, the concentration of suspended matters in the wastewater is effectively reduced through the two-stage adsorption pool, the reaction flow state and the contact specific surface area in the biological reaction pool are optimized and improved, and the biodegradation efficiency is improved; the biological reaction tank further adsorbs and enriches heavy metal ions and provides a carbon source for the SRB, so that the treatment activity and survival time of the SRB flora are increased; the up-flow nitrogen diffusion device is arranged at the downstream of the SRB water inlet, so that the mass transfer of the SRB and the wastewater is accelerated while an anaerobic condition is formed, and the sedimentation and sedimentation are prevented; and filtering the metal precipitate by using a zeolite filler tank to finish the advanced treatment.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. The anaerobic remediation system for mine wastewater is characterized by comprising an anaerobic remediation system main body, wherein the anaerobic remediation system main body comprises a remediation system tank body, a primary activated carbon filtering tank (1), a secondary bentonite-dolomite adsorption tank (2), a biological reaction tank (3), a zeolite filler tank (4), a liquid spray pipe (10), a gas spray pipe (11) and a vent valve, the primary activated carbon filtering tank (1), the secondary bentonite-dolomite adsorption tank (2), the biological reaction tank (3) and the zeolite filler tank (4) are sequentially connected, the upper part of the primary activated carbon filtering tank (1), the lower part of the biological reaction tank (3), the upper part of the zeolite filler tank (4) are respectively connected with a water inlet pipe, the upper part of the biological reaction tank (3) is connected with the vent valve, and the upper part of the tail end of the zeolite filler tank (4) is connected with a water outlet pipe, the lower part of the tail end of the zeolite filler tank (4) is connected with the emptying valve, and flowmeters are respectively arranged on a water inlet pipe on the primary activated carbon filter tank (1), a water outlet pipe on the zeolite filler tank (4), the liquid spray pipe (10) and the gas spray pipe (11).
2. The anaerobic remediation system for mine wastewater of claim 1 wherein the anaerobic remediation system body is closed.
3. The anaerobic remediation system for mine wastewater of claim 1, wherein the primary activated carbon filtration tank (1) and the secondary bentonite-dolomite adsorption tank (2) are separated by a 80-mesh stainless steel dense net, and the left and right sides of the biological reaction tank (3) are separated by a solid partition plate to form a layered partition plate (7).
4. The anaerobic remediation system for mine wastewater of claim 1, wherein the liquid spray pipe (10) is located at the bottom of the biological reaction tank (3) near the water inlet (12), one end of the liquid spray pipe (10) is connected with the bacteria liquid of sulfate reducing bacteria, the gas spray pipe (11) is located at the central part of the bottom of the biological reaction tank (3), and one end of the gas spray pipe (11) is connected with the nitrogen source.
5. The anaerobic remediation system for mine wastewater of claim 1, wherein the blending mass ratio of bentonite and dolomite in the secondary bentonite-dolomite adsorption tank (2) is 2:1-4:1, and the granulated bentonite-dolomite mixed filter material with a particle size of about 1.5mm is filled in the secondary bentonite-dolomite adsorption tank (2).
6. The anaerobic remediation system for mine wastewater of claim 1 wherein the zeolite in the zeolite packing pond (4) has a particle size of 2.5 to 5.0 mm.
7. The anaerobic remediation system for mine wastewater as claimed in claim 3, wherein the biological filler in the biological reaction tank (3) is dried bagasse, straw, and corncob in a volume ratio of 1:1:4 to 1:1:8, the corncob is cylindrical, the biological filler is packed in layers with a packing density of 70%, and the biological filler (6) packed between the layered partition plates (7) is bagasse and straw placed in a PET fiber dense mesh bag.
8. The anaerobic remediation system for mine wastewater of claim 1, wherein the retention time of the secondary bentonite-dolomite adsorption tank (2) is 4-8 hours, and the retention time of the biological reaction tank (3) is 48-120 hours.
9. A treatment method of an anaerobic remediation system for mine wastewater is characterized by comprising the following steps:
the method comprises the following steps: designing the size and the retention time of each unit of the remediation system, the water inlet and outlet flow, the SRB remediation bacteria liquid flow and the gas flow parameters according to the pollution characteristics of the mine wastewater, connecting the water inlet of the remediation system with the mine wastewater to be treated, checking the connection tightness of each interface, setting flow and pressure monitoring control values, and opening a water inlet pipe;
step two: after the water inflow of the biological reaction tank (3) exceeds about 1/3 of the volume of the biological reaction tank (3), simultaneously opening a gas spray pipe (11) and a liquid spray pipe (10) for water inflow and air inflow, and opening a gas emptying valve to be externally connected with a waste gas collecting device through a waste gas collecting port (9);
step three: opening a water outlet of the anaerobic remediation system to effectively collect and treat the effluent;
step four: after the repair is finished, closing a water inlet (12) and a liquid spray pipe (10) of the biological reaction tank (3), discharging all waste gas, removing a gas spray pipe (11), connecting the gas spray pipe with a collecting tank, and collecting residual waste water in the biological reaction tank (3);
step five: when back washing is needed, the directions of back washing water flow are respectively a zeolite filling tank (4), a biological reaction tank (3), a secondary bentonite-dolomite adsorption tank (2) and a primary activated carbon filter tank (1); firstly, a water outlet pipe of an anaerobic remediation system is opened to be connected with a backwashing water source for reverse water inflow, a gas emptying valve above a biological reaction tank (3) is connected with the backwashing water source for reverse water inflow, a liquid spray pipe (10) is closed, a gas spray pipe (11) is removed and is connected with a collecting tank, backwashing wastewater and sediments are collected, and a water inlet pipe of the anaerobic remediation system is connected with a backwashing water outlet collecting device.
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