CN111056712A - Treatment method of nitro-nitrate ester-based explosive wastewater - Google Patents
Treatment method of nitro-nitrate ester-based explosive wastewater Download PDFInfo
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Abstract
The invention provides a method for treating nitro-nitrate base explosive wastewater, belonging to the technical field of explosive wastewater treatment. The processing method provided by the invention comprises the following steps: homogenizing and homogenizing nitro-nitrate base explosive wastewater, adjusting the pH value to 4-5, and mixing with nutrient substances to obtain wastewater to be biochemically treated; sequentially carrying out anaerobic treatment, denitrification treatment and aerobic treatment on the wastewater to be biochemically treated, and then enabling effluent of the aerobic treatment to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater; and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water. The invention combines physical chemistry and biological treatment technologies, has reasonable process, safe operation, low operation cost and better impact resistance and operability, and effectively solves the problems of high COD concentration, high treatment difficulty, high operation cost and high operation labor intensity of the nitro-nitrate-based explosive wastewater.
Description
Technical Field
The invention belongs to the technical field of explosive wastewater treatment, and particularly relates to a treatment method of nitro-nitrate base explosive wastewater.
Background
The waste water produced in the production process of the nitro-nitrate base explosive mainly comprises acidic waste water which is diluted and filtered after nitration, weak alkaline waste water produced in the pre-washing and stewing process and solvent-containing waste water produced by product recrystallization and filtration. The wastewater mainly comprises nitric acid, hypochlorous acid, magnesium nitrate, sodium nitrate, DEA (2, 6-diethylaniline), DINA (diisononyl adipate), sodium carbonate, alcohol, acetone and other pollutants, and has the characteristics of high-concentration nitro compounds, high-concentration COD (chemical oxygen demand), high acidity, high treatment difficulty and the like.
At present, the industrial waste water of explosives and powders is mainly treated by physical and chemical methods such as an adsorption method, a chemical oxidation method, a coagulating sedimentation method, an extraction method, an evaporation-incineration method, a neutralization method, an electrolysis method and the like, and has the defects of complex process flow, high treatment cost and the like. The nitro-nitrate base explosive mainly adopts an activated carbon adsorption method to remove pollutants in wastewater, but the activated carbon is not easy to regenerate after saturated adsorption, needs frequent replacement, has high operation cost, high operation labor intensity and more required personnel, and the effluent index cannot meet the increasingly strict national emission requirement.
Disclosure of Invention
The invention aims to provide a treatment method of nitro-nitrate base explosive wastewater, which has the advantages of simple process, safe operation and low operation cost.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for treating nitro-nitrate base explosive wastewater, which comprises the following steps:
homogenizing and homogenizing nitro-nitrate base explosive wastewater, adjusting the pH value to 4-5, and mixing with nutrient substances to obtain wastewater to be biochemically treated;
sequentially carrying out anaerobic treatment, denitrification treatment and aerobic treatment on the wastewater to be biochemically treated, and then enabling effluent of the aerobic treatment to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater;
and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water.
Preferably, the COD of the effluent water obtained after homogenizing and homogenizing is less than 5000mg/L, and the pH value is 1-3.
Preferably, the mass ratio of carbon to nitrogen in the wastewater to be biochemically treated is 12-16: 1.
Preferably, the anaerobic treatment is carried out in an upflow anaerobic sludge bed reactor, the temperature of the anaerobic treatment is 20-35 ℃, the time is 72 hours, the COD of effluent of the anaerobic treatment is less than 1000mg/L, and the sludge content is 40-60 g/L.
Preferably, the denitrification treatment is carried out in an anoxic tank, a suspended anoxic filler is filled in the anoxic tank, and the specific surface area of the suspended anoxic filler is 230-240 m2/m3The filling rate of the suspension anoxic filler is 48-52%; a biological film is attached to the suspended anoxic filler, and the biological attachment amount of the suspended anoxic filler is 120-130 g/m2(ii) a The temperature of the denitrification treatment is 20-40 ℃, and the time is 8-10 h.
Preferably, the aerobic treatment is carried out in a biological contact oxidation tank, the biological contact oxidation tank is filled with elastic filler, and the specific surface area of the elastic filler is 300-310 m2/m3The elastic filler is attached with a biological film, and the biological attachment amount of the elastic filler is 100-135 g/m2(ii) a The filling rate of the elastic filler is 30-50%; and a superfine grid is arranged in the contact oxidation tank to remove suspended matters.
Preferably, the aerobic treatment is carried out at the temperature of 10-35 ℃ for 20-24 h; the aeration device of the biological contact oxidation tank is a tubular membrane aeration device.
Preferably, an aeration device in the MBR membrane bioreactor is a tubular membrane aeration device, and the activated sludge concentration in the MBR membrane bioreactor is 10000 mg/mlL or more, and the membrane flux is 20L/m2H, the temperature is 10-35 ℃, and the retention time of the wastewater is 10-14 h.
Preferably, the sedimentation is carried out in a clean water tank, the retention time of the biochemical treatment wastewater in the clean water tank is 12 hours, and the COD of the effluent of the clean water tank is less than 150 mg/L.
Preferably, the sludge in the upflow anaerobic sludge blanket reactor and the MBR membrane bioreactor is periodically discharged into a sludge tank, and then flocculation, dehydration and incineration treatment are sequentially carried out.
The invention provides a method for treating nitro-nitrate base explosive wastewater, which comprises the following steps: homogenizing and homogenizing nitro-nitrate base explosive wastewater, adjusting the pH value to 4-5, and mixing with nutrient substances to obtain wastewater to be biochemically treated; sequentially carrying out anaerobic treatment, denitrification treatment and aerobic treatment on the wastewater to be biochemically treated, and then enabling effluent of the aerobic treatment to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater; and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water. According to the invention, by utilizing the characteristic that esters and alcohols in the nitro-nitrate base explosive wastewater are easy to biochemically process, the nitro-nitrate base explosive wastewater is homogenized and equalized, the pH value is adjusted to 4-5, then the nitro-nitrate base explosive wastewater is mixed with nutrient substances to obtain wastewater to be biochemically processed, most organic pollutants are removed through anaerobic treatment, and part of pollutants which are difficult to biochemically degrade (such as triethanolamine and diethanol nitramine) are converted into substances (such as alcohol substances) which are easy to be utilized by microorganisms, and COD can be reduced at the same time; the effluent after anaerobic treatment is subjected to denitrification treatment, so that nitrate can be converted into nitrogen, and the content of ammonia nitrogen in the wastewater is reduced; the effluent of the denitrification treatment can be subjected to aerobic treatment to convert organic matters (DEA, DINA, alcohol and the like) into CO2And a cytoplasm; the effluent of the aerobic treatment is subjected to advanced treatment by an MBR (membrane bioreactor) to obtain biochemical treatment wastewater, and the biochemical treatment wastewater is subjected to simple precipitation and activated carbon adsorption to obtain purified water with stable and standard water quality. The invention combines physical chemistry and biological treatment technology, has reasonable process, safe operation, low operation cost and better impact resistance (namely, the invention has better impact resistanceThe system established by the invention is suitable for the survival of microorganisms, has resistance to nitro-nitrate-based compounds and high toxicity resistance of the system) and operability, and reduces the using amount of the active carbon, thereby effectively solving the problems of high COD concentration, large treatment difficulty, high operation cost and high operation labor intensity of the nitro-nitrate-based explosive wastewater.
Drawings
FIG. 1 is a schematic view of a treatment process of wastewater from a nitro-nitrate-based explosive provided by the present invention.
Detailed Description
The invention provides a method for treating nitro-nitrate base explosive wastewater, which comprises the following steps:
homogenizing and homogenizing nitro-nitrate base explosive wastewater, adjusting the pH value to 4-5, and mixing with nutrient substances to obtain wastewater to be biochemically treated;
sequentially carrying out anaerobic treatment, denitrification treatment and aerobic treatment on the wastewater to be biochemically treated, and then enabling effluent of the aerobic treatment to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater;
and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water.
According to the invention, the wastewater of the nitro-nitrate base explosive is homogenized and weighed, the pH value is adjusted to 4-5, and then the wastewater is mixed with nutrient substances to obtain the wastewater to be biochemically treated.
In the invention, the nitro-nitrate-based explosive wastewater is preferably a mixture of acidic wastewater, weakly alkaline wastewater and solvent-containing wastewater generated in the preparation process of a nitro-nitrate-based explosive (such as N-nitrodiethanolamine dinitrate), the water quality of the nitro-nitrate-based explosive wastewater is not particularly limited, in the embodiment of the invention, the Chemical Oxygen Demand (COD) of the nitro-nitrate-based explosive wastewater is preferably 4416-4516 mg/L (chemical oxygen demand (COD) measured by a potassium dichromate method without special description), and the total concentration of all solutes in the nitro-nitrate-based explosive wastewater is 114-120 mg/L.
In the invention, the COD of the effluent obtained after homogenizing and homogenizing is preferably less than 5000mg/L, and the pH value is preferably 1-3; the homogenization is preferably carried out in a regulating tank; the method for adjusting the homogenization quantity is not particularly limited, and the wastewater with the water quality can be obtained by adopting a conventional homogenization quantity-equalizing adjusting method; the bottom of the regulating tank can generate precipitated waste chemicals, the waste chemicals are required to be removed regularly, and sludge obtained by removing the waste chemicals (namely the precipitated waste chemicals) is mixed with sludge generated by flocculation in the subsequent steps, and the sludge is dewatered and incinerated together.
In the invention, the regulator used for regulating the pH value is preferably liquid alkali, and the liquid alkali is preferably sodium hydroxide solution; the step of adjusting the pH is preferably performed in a neutralization tank.
In the present invention, the nutrient is preferably glucose; the adding amount of the nutrient substances is based on obtaining the wastewater to be biochemically treated with the required carbon-nitrogen ratio; the step of adding nutrients is preferably performed in an intermediate pond.
In the invention, the mass ratio of carbon to nitrogen in the wastewater to be biochemically treated is preferably 12-16: 1, and more preferably 14: 1.
After the wastewater to be biochemically treated is obtained, the wastewater to be biochemically treated is sequentially subjected to anaerobic treatment, denitrification treatment and aerobic treatment, and the effluent of the aerobic treatment passes through an MBR (membrane bioreactor) to obtain the biochemically treated wastewater.
In the invention, the anaerobic treatment is preferably carried out in an upflow anaerobic sludge blanket reactor (UASB), the temperature of the anaerobic treatment is preferably 20-35 ℃, more preferably 22 ℃, the time (namely the retention time of the wastewater in the upflow anaerobic sludge blanket reactor) is preferably 72h, the sludge content is preferably 40-60 g/L, and the COD of the effluent of the anaerobic treatment is preferably less than 1000 mg/L. In the invention, the UASB consists of a sludge reaction zone (positioned at the bottom), a gas-liquid-solid three-phase separator (comprising a settling zone) and a gas chamber, a large amount of anaerobic sludge is reserved in the bottom reaction zone, and anaerobic microorganisms in the anaerobic sludge can remove part of COD and improve the biodegradability of wastewater through the reductive cracking and the non-reductive cracking of a nitro-nitrate-based compound (triethanolamine, diethanolamine, N-nitrodiethanolamine dinitrate); a backflow system (such as a sludge backflow seam and an internal backflow pipe) is arranged in the UASB, and part of the mud-water mixture flows back to the UASB, so that on one hand, the backflow of the sewage dilutes the water entering the UASB, the unit concentration of organic matters in the reactor is reduced, and the toxicity of refractory substances to microorganisms is weakened; on the other hand, the backflow of the sludge ensures that the UASB has enough biomass, thereby being beneficial to the stable operation of the reactor.
In the invention, the denitrification treatment is preferably carried out in an anoxic tank, the anoxic tank is preferably filled with suspended anoxic fillers (namely suspended fillers), and the specific surface area of the suspended anoxic fillers is preferably 230-240 m2/m3More preferably 236m2/m3The bulk density is preferably 103 to 107kg/m3More preferably 105kg/m3(ii) a The filling rate of the suspended anoxic filler is preferably 48-52%, and more preferably 50%; the preferred biological attachment amount of the suspended anoxic filler is 120-130 g/m2More preferably 125g/m2(ii) a The temperature of the denitrification treatment is preferably 20-40 ℃, more preferably 22 ℃, and the time is preferably 8-10 hours, more preferably 10 hours. According to the invention, the denitrification treatment can convert nitrate radicals into nitrogen gas and reduce the content of ammonia nitrogen in the wastewater, the pH value of the wastewater can be increased to 6-6.5 under the denitrification treatment condition, and the COD is reduced to 700-900 mg/L.
In the invention, the aerobic treatment is preferably carried out in a biological contact oxidation tank, and the biological contact oxidation tank is preferably filled with elastic filler, wherein the elastic filler is preferably high-density elastic filler, and more preferably high-density elastic filler made of polyolefin; the specific surface area of the elastic filler is preferably 300-310 m2/m3More preferably 310m2/m3(ii) a The specification of the elastic filler is not particularly limited, and in the embodiment of the invention, the outer diameter of the elastic filler is preferably 150mm, and the fiber diameter is preferably 0.5 mm; the number of unit strings is preferably 38 to 42 strings/m3More preferably 40 strings/m3(ii) a The preferred unit weight is 3.3-3.7 kg/m3More preferably 3.5kg/m3。
In the invention, the elastic filler is adhered with a biological film, and the biological adhesion amount of the elastic filler is preferably 100-135 g/m2More preferably 130g/m2(ii) a The filling rate of the elastic filler is preferably 30-50%, and more preferably 40%; the biological contact oxidation pond is internally provided with an ultrafine grating for removing suspended matters, and the gap of the grating of the ultrafine grating is preferably 2 mm. The aerobic treatment temperature is preferably 10-35 ℃, more preferably 22 ℃, and the time is preferably 20-24 h, more preferably 24 h; the aeration device of the biological contact oxidation pond is a tubular membrane aeration device, and the aeration rate of the aeration device is preferably 1.5-3 m3H, more preferably 2.7m3H is used as the reference value. In the present invention, the aerobic treatment can convert organic substances (DEA, DINA, alcohol, etc.) into CO2And cytoplasm.
In the invention, the aeration device in the MBR membrane bioreactor is preferably a tubular membrane aeration device, and the aeration rate is preferably 1.5-3 m3H, more preferably 2.7m3H; the concentration of activated sludge in the MBR membrane bioreactor is preferably 10000-16000 mg/L, and the membrane flux is preferably 20L/m2H, the residence time of the waste water is preferably 12 h. In the invention, the MBR membrane bioreactor can carry out advanced treatment on wastewater, wherein the membrane intercepts microorganisms in the reaction tank, the concentration of activated sludge is improved, the biochemical reaction is more thorough, and the membrane has high filtering precision, good and stable effluent quality and low suspended matters and turbidity.
In the invention, the MBR membrane bioreactor is preferably backwashed for 30min every 20 h; the backwashing water is preferably flocculated effluent (namely effluent of a clean water tank); preferably discharging backwash effluent generated by the backwash into an adjusting tank, mixing the effluent with the nitro-nitrate base explosive wastewater, and homogenizing; after the MBR membrane bioreactor is used for a long time, cleaning liquid is preferably prepared to clean the MBR membrane.
In the invention, the sludge in the upflow anaerobic sludge bed reactor and the MBR membrane bioreactor is preferably discharged into a sludge tank at regular intervals, and then flocculation, dehydration and incineration treatment are sequentially carried out.
In the present invention, the flocculating agent is preferably PAM (polyacrylamide); the using amount of the flocculant is preferably 0.001-0.003 g/L, the flocculant is preferably added in the form of a flocculant aqueous solution, and the mass concentration of the flocculant aqueous solution is preferably 0.10-0.15%; the sediment generated by flocculation is sludge, and the sludge is dehydrated and then is incinerated; the dewatering is preferably carried out in a screw sludge dewatering machine.
After the biochemical treatment wastewater is obtained, the biochemical treatment wastewater is precipitated and then is adsorbed by activated carbon to obtain purified water.
In the invention, the precipitation is preferably carried out in a clean water tank, the retention time of the biochemical treatment wastewater in the clean water tank is preferably 12h, and the COD of the effluent of the clean water tank is preferably less than 150 mg/L. In the invention, the clean water tank can precipitate suspended matters on one hand and can be used as an effluent water storage tank on the other hand.
In the invention, the activated carbon adsorption is carried out in an activated carbon adsorption device, the particle size of the activated carbon in the activated carbon adsorption device is preferably 2-4 mm, and the iodine value is preferably more than 1000 mg/g; the specific specification of the activated carbon adsorption device and the residence time in the activated carbon adsorption device are not particularly limited, in the embodiment of the invention, the activated carbon adsorption device is preferably a cylindrical tower structure, the diameter is preferably 1000mm, the height is preferably 1500mm, the height of an effective filler is preferably 1500mm, the height of a cushion layer is preferably 400mm, and the flow rate of wastewater is preferably 3-5 m3H, more preferably 2.7m3/h。
In the invention, the Chemical Oxygen Demand (COD) of the purified water is preferably 132-140 mg/L, and the concentration of the nitro-nitrate-based explosive is 1.4-1.8 mg/L.
The following examples are provided to illustrate the treatment of wastewater containing nitro-nitrate type explosives in accordance with the present invention, but should not be construed as limiting the scope of the present invention.
The process flow for treating the nitro-nitrate base explosive wastewater in the embodiment of the invention is shown in figure 1:
sequentially passing the nitro-nitrate-based explosive wastewater through a regulating tank, a neutralization tank, a middle water tank, an up-flow anaerobic sludge bed reactor, an anoxic tank, a contact oxidation tank, an MBR (membrane bioreactor), a clean water tank and an active carbon adsorption device to obtain purified water, wherein the sludge in the up-flow anaerobic sludge bed reactor and the MBR is preferably periodically discharged into the sludge tank (so that the sludge content in the two reactors is in a proper range), and then sequentially carrying out flocculation, dehydration and incineration treatment, wherein a flocculating agent for flocculation is PAM; backwashing the MBR for 30min every 20h, wherein backwashing water is flocculated effluent (namely effluent of a clean water tank), discharging backwashing effluent generated by backwashing to an adjusting tank, mixing with nitro-nitrate-based explosive wastewater, and homogenizing;
the specific operation of each example is as follows:
examples 1 to 6:
introducing the nitro-nitrate ester-based explosive wastewater (the water quality is shown in the column of raw water in table 1) into a regulating tank for homogenizing and homogenizing, wherein the water quality of the homogenized and homogenized effluent is as follows: COD: 4000-5000 mg/L, pH value: 1-3; then adjusting the pH value of the homogenized and uniform effluent to 4-5 in a neutralization tank; mixing the effluent of the neutralization tank with nutrient substances in an intermediate water tank to obtain wastewater to be biochemically treated; wherein the nutrient substance is glucose, and the carbon-nitrogen ratio of the wastewater to be biochemically treated is 14: 1;
introducing the wastewater to be biochemically treated into an up-flow anaerobic sludge bed reactor for anaerobic treatment, wherein the sludge content in the up-flow anaerobic sludge bed reactor is maintained at 40-60 g/L, the temperature is 22 ℃, and the retention time in the up-flow anaerobic sludge bed reactor is 72 hours; the water quality of the effluent of the upflow anaerobic sludge bed reactor is as follows: COD: 800-1000 mg/L, wherein the total concentration of all solutes in the nitro-nitrate-based explosive is 40-60 mg/L;
introducing the effluent of the upflow anaerobic sludge bed reactor into an anoxic tank for denitrification treatment, wherein the suspended anoxic filler in the anoxic tank is a polyhedral hollow spherical suspended fillerA specific surface area of 236m2/m3At a bulk density of 105kg/m2Filling with a filling rate of 50% and a biological attachment amount of 125g/m2The temperature is 22 ℃, and the time is 10 hours; the water quality of the effluent of the anoxic tank is COD: 700-900 mg/L, and the total concentration of all solutes in the nitro-nitrate-based explosive is 30-50 mg/L;
introducing the effluent of the anoxic tank into a contact oxidation tank for aerobic treatment, wherein elastic filler is filled in the biological contact oxidation tank, the elastic filler is high-density elastic filler made of polyolefin, and the specific surface area of the elastic filler is 310m2/m3The concrete specification is as follows: the outer diameter is 150mm, the fiber diameter is 0.5mm, about 40 strings are hung per square meter, and the unit weight is 3.5kg/m3The elastic filler is attached with a biological film, and the biological attachment amount is 130g/m2(ii) a The filling rate of the elastic filler is 40 percent; an ultrafine grid is arranged in the biological contact oxidation tank, and the gap between grid bars is 2 mm; the temperature of the biological contact oxidation pond is 22 ℃, the retention time is 24 hours, the aeration device of the biological contact oxidation pond is a tubular membrane aeration device, the aeration time of the aeration device is 24 hours, and the aeration rate of the aeration device is 2.7m3H; the effluent quality of the contact oxidation tank is COD: 300-400 mg/L, wherein the total concentration of all solutes in the nitro-nitrate-based explosive is 10-30 mg/L;
the effluent of the contact oxidation tank is introduced into an MBR membrane bioreactor, the aeration device is a tubular membrane aeration device, and the aeration rate is 2.7m3H is used as the reference value. The concentration of activated sludge in the MBR membrane bioreactor is maintained at 10000-16000 mg/L, the membrane flux is 20L/square meter.h, and the retention time of wastewater is 12 h; the effluent quality of the MBR membrane bioreactor is COD: 150-300 mg/L, wherein the total concentration of all solutes in the nitro-nitrate-based explosive is 5-10 mg/L;
and (2) introducing the effluent (namely the biochemical treatment wastewater) of the MBR membrane bioreactor into a clean water tank, wherein the retention time in the clean water tank is 12h, and the effluent quality of the clean water tank is COD: 150-300 mg/L, wherein the total concentration of all solutes in the nitro-nitrate-based explosive is 5-10 mg/L;
introducing the effluent of the clean water tank into an activated carbon adsorption device for activated carbon adsorptionAttaching to obtain purified water, performing an activated carbon adsorption process in an adsorption device of a cylindrical tower body structure, wherein the diameter of the device is 1000mm, the height of the device is 1500mm, the height of an effective filler is 1500mm, the height of a cushion layer is 400mm, and the flow of wastewater is controlled to be 3-5 m3Within the range of per hour, the particle size of the activated carbon filler is 3-4 mm. The water quality of the nitro-nitrate-based explosive waste water (i.e., raw water) and purified water is shown in table 1.
Sludge in the upflow anaerobic sludge blanket reactor and the MBR membrane bioreactor is periodically discharged into a sludge tank, and then flocculation, dehydration and incineration treatment are sequentially carried out.
TABLE 1 quality of wastewater and purified water of nitro-nitrate-based explosives in examples 1 to 6
As can be seen from Table 1, the method provided by the invention can effectively treat the nitro-nitrate-based explosive wastewater, can reduce the Chemical Oxygen Demand (COD) of the nitro-nitrate-based explosive wastewater with the Chemical Oxygen Demand (COD) of 4416-4516 mg/L and the concentration of 114-120 mg/L to 129-140 mg/L and reduce the concentration to 1.4-1.8 mg/L, and effectively solves the problems of high COD concentration, high treatment difficulty, high operation cost and high operation labor intensity of the nitro-nitrate-based explosive wastewater.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A treatment method of nitro-nitrate ester-based explosive wastewater is characterized by comprising the following steps:
homogenizing and homogenizing nitro-nitrate base explosive wastewater, adjusting the pH value to 4-5, and mixing with nutrient substances to obtain wastewater to be biochemically treated;
sequentially carrying out anaerobic treatment, denitrification treatment and aerobic treatment on the wastewater to be biochemically treated, and then enabling effluent of the aerobic treatment to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater;
and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water.
2. The treatment method according to claim 1, wherein the COD of the effluent obtained after homogenizing and homogenizing is less than 5000mg/L, and the pH value is 1-3.
3. The treatment method according to claim 1, wherein the mass ratio of carbon to nitrogen in the wastewater to be biochemically treated is 12-16: 1.
4. The treatment method according to claim 1, wherein the anaerobic treatment is carried out in an upflow anaerobic sludge bed reactor, the temperature of the anaerobic treatment is 20-35 ℃, the time is 72 hours, the COD of effluent of the anaerobic treatment is less than 1000mg/L, and the sludge content is 40-60 g/L.
5. The treatment method according to claim 1, wherein the denitrification treatment is carried out in an anoxic tank filled with a suspended anoxic filler having a specific surface area of 230 to 240m2/m3The filling rate of the suspension anoxic filler is 48-52%; a biological film is attached to the suspended anoxic filler, and the biological attachment amount of the suspended anoxic filler is 120-130 g/m2(ii) a The temperature of the denitrification treatment is 20-40 ℃, and the time is 8-10 h.
6. The treatment method according to claim 1, wherein the aerobic treatment is carried out in a biological contact oxidation tank, the biological contact oxidation tank is filled with elastic filler, and the specific surface area of the elastic filler is 300-310 m2/m3The elastic filler is attached with a biological film, and the biological attachment amount of the elastic filler is 100-135 g/m2(ii) a The filling rate of the elastic filler is 30-50%; the contactThe oxidation pond is internally provided with a superfine grid to remove suspended matters.
7. The treatment method according to claim 1 or 6, wherein the aerobic treatment is carried out at a temperature of 10 to 35 ℃ for 20 to 24 hours; the aeration device of the biological contact oxidation tank is a tubular membrane aeration device.
8. The treatment method according to claim 1, wherein the aeration device in the MBR membrane bioreactor is a tubular membrane aeration device, the concentration of the activated sludge in the MBR membrane bioreactor is more than 10000mg/L, and the membrane flux is 20L/m2H, the temperature is 10-35 ℃, and the retention time of the wastewater is 10-14 h.
9. The treatment method according to claim 1, wherein the precipitation is carried out in a clean water tank, the retention time of the biochemical treatment wastewater in the clean water tank is 12h, and the effluent COD of the clean water tank is less than 150 mg/L.
10. The treatment method according to claim 4, wherein the sludge in the upflow anaerobic sludge blanket reactor and the MBR membrane bioreactor is periodically discharged into a sludge tank, and then flocculation, dehydration and incineration treatment are sequentially carried out.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100821659B1 (en) * | 2007-02-28 | 2008-04-14 | (주)이엔바이오21 | E-mbr system |
| WO2012009462A2 (en) * | 2010-07-13 | 2012-01-19 | Ecologico-Logic, Inc. | Solid waste digestion system |
| CN102491584A (en) * | 2011-11-25 | 2012-06-13 | 甘肃银光化学工业集团有限公司 | Mixed treatment method of explosive waste water and nitrobenzene and aniline waster water |
| CN105565614A (en) * | 2016-03-04 | 2016-05-11 | 彩客化学（东营）有限公司 | Method and system for treating toluene nitrification wastewater |
| CN105693019A (en) * | 2016-02-19 | 2016-06-22 | 山东华鸿化工有限公司 | System and method for treating wastewater containing nitrobenzene, aniline and cyclohexylamine |
| CN106746288A (en) * | 2016-12-30 | 2017-05-31 | 四川师范大学 | TNT produces the processing method of waste water |
-
2020
- 2020-01-07 CN CN202010013810.6A patent/CN111056712A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100821659B1 (en) * | 2007-02-28 | 2008-04-14 | (주)이엔바이오21 | E-mbr system |
| WO2012009462A2 (en) * | 2010-07-13 | 2012-01-19 | Ecologico-Logic, Inc. | Solid waste digestion system |
| CN102491584A (en) * | 2011-11-25 | 2012-06-13 | 甘肃银光化学工业集团有限公司 | Mixed treatment method of explosive waste water and nitrobenzene and aniline waster water |
| CN105693019A (en) * | 2016-02-19 | 2016-06-22 | 山东华鸿化工有限公司 | System and method for treating wastewater containing nitrobenzene, aniline and cyclohexylamine |
| CN105565614A (en) * | 2016-03-04 | 2016-05-11 | 彩客化学（东营）有限公司 | Method and system for treating toluene nitrification wastewater |
| CN106746288A (en) * | 2016-12-30 | 2017-05-31 | 四川师范大学 | TNT produces the processing method of waste water |
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