CN111377576B - Industrial wastewater treatment process - Google Patents

Industrial wastewater treatment process Download PDF

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CN111377576B
CN111377576B CN201911142640.5A CN201911142640A CN111377576B CN 111377576 B CN111377576 B CN 111377576B CN 201911142640 A CN201911142640 A CN 201911142640A CN 111377576 B CN111377576 B CN 111377576B
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treatment
wastewater
tank
clay
industrial wastewater
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CN111377576A (en
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肖林伟
陈宇龙
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Zhejiang Glassic Chemicals New Materials Co ltd
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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
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

The invention belongs to the technical field of wastewater treatment. The invention discloses an industrial wastewater treatment process, which comprises the steps of sequentially passing industrial wastewater stored in a wastewater collection tank through a wastewater demulsification tank, a first aerobic biochemical treatment tank, an electrolytic tank, an anaerobic biochemical treatment tank, a second aerobic biochemical treatment tank and a sedimentation tank to obtain primary treatment wastewater, collecting the primary treatment wastewater into the collection tank, collecting the primary treatment wastewater qualified in detection into a circulating water cooling tank, passing through a reverse osmosis treatment device to obtain treatment wastewater, and storing the treatment wastewater into a water storage tank; the primary treatment wastewater which is detected to be unqualified in the collection tank is converged into the first aerobic biochemical treatment tank for continuous treatment. The industrial wastewater treatment process has better pertinence, and the microorganisms in the industrial wastewater treatment process are immobilized and transformed, so that the wastewater treatment efficiency can be increased, the wastewater treatment cost is reduced, and the immobilized and transformed microorganisms are favorable for recycling of the microorganisms.

Description

Industrial wastewater treatment process
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater treatment process.
Background
The industrial wastewater comprises production wastewater, production sewage and cooling water, and refers to wastewater and waste liquid generated in industrial production, wherein the wastewater and waste liquid contain industrial production raw materials, intermediate products, byproducts and pollutants generated in the production process, which are lost along with water. The components in the industrial wastewater are complex, but most of the industrial wastewater contains a large amount of substances which are toxic and harmful to human and environment, and the substances which are not treated and then are randomly discharged have great harm to the environment and the health of human, so that the industrial wastewater needs to be correspondingly treated before being discharged, so that the harmful components in the industrial wastewater are reduced to a dischargeable degree. In addition, a comprehensive utilization technique of wastewater, which recycles and reuses the wastewater after treatment, is also receiving increasing attention. However, no matter the wastewater is discharged or recycled after treatment, because the industrial wastewater has numerous sources and the components are relatively responsible, various treatment methods and systems in the prior art have poor pertinence and poor treatment effect, or the treated wastewater cannot completely reach the discharge standard, or the treatment cost is increased and the treatment efficiency is reduced.
For example, chinese patent publication No. CN106145404A discloses an industrial wastewater treatment and recovery system and a treatment process in 2016, 11, 23, but it can be found through analysis that the treatment and recovery system still has the problems of high treatment cost, low treatment efficiency, and the like; also, as an industrial wastewater treatment system disclosed in 2018, 2.2.2018, chinese patent publication No. CN107651769A, although it is claimed to have the advantages of strong pertinence, obvious treatment effect, etc., it actually has the problems of high treatment cost, low treatment efficiency, etc. after analysis.
Disclosure of Invention
In order to solve the problems, the invention provides an industrial wastewater treatment process with strong wastewater treatment pertinence, high treatment efficiency and good effect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an industrial wastewater treatment process comprises the steps that industrial wastewater stored in a wastewater collection tank sequentially passes through a wastewater milk breaking tank, a first aerobic biochemical treatment tank, an electrolytic tank, an anaerobic biochemical treatment tank, a second aerobic biochemical treatment tank and a sedimentation tank to obtain primary treatment wastewater, the primary treatment wastewater is collected into the collection tank, the primary treatment wastewater qualified in detection is collected into a circulating water cooling tank, passes through a reverse osmosis treatment device to obtain treatment wastewater, and is stored into a water storage tank; the primary treatment wastewater which is detected to be unqualified in the collection tank is converged into a first aerobic biochemical treatment tank for continuous treatment; and a first water treatment agent is added into the wastewater demulsification tank, a second water treatment agent is added into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and a third water treatment agent is added into the anaerobic biochemical treatment tank.
Preferably, a stirring device is arranged in the wastewater milk breaking pool.
Preferably, the sediment in the sedimentation tank is treated by a filter press to recover sludge, and the outlet water of the filter press is converged into the collection tank.
Preferably, the first water treatment agent is at least one of aluminum sulfate, polyaluminum sulfate or polyvinyl alcohol; the second water treatment agent is immobilized microorganism, and the third water treatment agent is at least one of sodium hypophosphite, manganese dioxide or phosphoric acid.
Preferably, the COD of the primary treatment wastewater in the collecting pool is not more than 50mg/L and the ammonia nitrogen is not more than 20mg/L, the primary treatment wastewater is qualified in detection, and otherwise, the primary treatment wastewater is unqualified in detection.
Preferably, the immobilized microorganism is prepared by the following method, crushing clay, calcining, cooling, soaking into a saturated sodium hydroxide solution until the clay is saturated, heating the clay to 60-80 ℃ and preserving heat, then heating to 500-600 ℃ and preserving heat, soaking into a sodium hydroxide solution after cooling and drying to prepare pretreated clay, dissolving polyvinyl alcohol into absolute ethyl alcohol to prepare a polyvinyl alcohol solution, adding the pretreated clay into the polyvinyl alcohol solution, then carrying out ball milling treatment, cleaning and drying to prepare treated clay, soaking the treated clay into a microorganism suspension, and drying at a low temperature to prepare the immobilized microorganism.
Preferably, the immobilized microorganism is prepared by the following method, firstly, clay is smashed to have a median particle size of 0.05-0.1 mm, then, the smashed clay is calcined at 400-450 ℃ for 0.5-1.0 hour, cooled and then soaked in a saturated sodium hydroxide solution until being saturated, the clay is heated to 60-80 ℃ and is kept warm for 50-60 minutes, then, the clay is heated to 500-600 ℃ and is kept warm for 1.5-2.5 hours, after being cooled, the clay is soaked in a 1-1.5 mol/L sodium hydroxide solution for 40-60 minutes and dried to prepare pretreated clay, polyvinyl alcohol is dissolved in absolute ethyl alcohol to prepare a polyvinyl alcohol solution with a concentration of 5-6 wt%, then the pretreated clay is added into the suspension, the weight of the pretreated clay is not less than 65wt% of the polyvinyl alcohol solution, then, ball milling treatment is carried out for 1-2 hours, cleaning and drying are carried out to prepare treated clay, then, the treated clay is soaked in the microorganism for 3-5 hours, drying at low temperature to obtain the immobilized microorganism.
Preferably, the microbial suspension is a microbial suspension consisting of bacillus and nitrifying bacteria.
Preferably, the viable bacteria colony count of Bacillus in the microorganism suspension is 1.0 × 107～1.0×108cfu/mL, viable bacterial colony count of nitrifying bacteria 5.0X 106～8.0×106 cfu/mL。
Preferably, the bacillus is at least one of bacillus subtilis or bacillus licheniformis.
Preferably, the nitrifying bacteria are at least one of nitrifying bacillus, nitrifying coccus, nitrosospira or nitrosococcus.
In the invention, immobilized and modified microorganisms are added into an aerobic biochemical treatment pool, wherein pretreated clay is adopted as a carrier, and the pretreatment of the clay is mainly to increase the adsorption performance of the clay and the affinity to bacteria, wherein one of the pretreatment is to carry out surface and pore ion activation, the other is to carry out proper pore-enlarging treatment, and the third is to use an organic chain with high affinity to carry out graft modification on the surface of the clay to form a cage-shaped structure formed by crosslinking of the organic chain so as to increase the load capacity and fix the microorganisms in the cage-shaped structure; the pore-expanding treatment is to mix sodium hydroxide and clay and then calcine the mixture at high temperature to corrode pore channels in the clay by the sodium hydroxide, the surface and pore channel ion activation is to soak the mixture by light metal alkaline solution, and the organic chain branch modification is to mix polyvinyl alcohol solution with the clay which is treated in the previous step and then ball mill the mixture for modification; the polyvinyl alcohol solution is modified and grafted to improve the affinity between organic components in the clay wastewater, and the polyvinyl alcohol solution is better combined with the organic components in the wastewater during wastewater treatment and promotes the microorganisms to degrade the organic components.
The wastewater treatment process has an excellent treatment effect on industrial wastewater containing polyacrylate emulsion, starch, sodium polyacrylate and the like as main components, and also has a good treatment effect on industrial wastewater containing other components.
Therefore, the invention has the following beneficial effects: the industrial wastewater treatment process has better pertinence, and the microorganisms in the industrial wastewater treatment process are immobilized and transformed, so that the wastewater treatment efficiency can be increased, the wastewater treatment cost is reduced, and the immobilized and transformed microorganisms are favorable for recycling of the microorganisms.
Drawings
FIG. 1 is a schematic flow diagram of the industrial wastewater treatment process of the present invention.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
It is to be understood that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, all the equipments and materials are commercially available or commonly used in the industry, and the methods in the following examples are conventional in the art unless otherwise specified.
Example 1
An industrial wastewater treatment process, as shown in figure 1, comprises the steps of sequentially passing industrial wastewater stored in a wastewater collection tank through a wastewater demulsification tank, a first aerobic biochemical treatment tank, an electrolytic tank, an anaerobic biochemical treatment tank, a second aerobic biochemical treatment tank and a sedimentation tank to obtain primary treatment wastewater, collecting the primary treatment wastewater into the collection tank, collecting the qualified primary treatment wastewater (namely COD is not more than 50mg/L and ammonia nitrogen is not more than 20 mg/L) into a circulating water cooling tank, passing through a reverse osmosis treatment device to obtain treatment wastewater, and storing the treatment wastewater into a water storage tank; the primary treatment wastewater which is detected to be unqualified in the collection tank is converged into a first aerobic biochemical treatment tank for continuous treatment; and a stirring device is arranged in the wastewater demulsification pool, sludge is recovered after sediment in the sedimentation pool is treated by a filter press, and the outlet water of the filter press is converged into a collection pool.
Wherein, a first water treatment agent aluminum sulfate is added into the wastewater milk breaking tank, a second water treatment agent immobilized microorganism is added into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and a third water treatment agent sodium hypophosphite is added into the anaerobic biochemical treatment tank.
The immobilized microorganism is prepared by the following method, firstly, clay is smashed to the median particle size of 0.05mm, then, the smashed clay is calcined at the temperature of 400 ℃ for 0.5 hour and is soaked in a saturated sodium hydroxide solution until the smashed clay is saturated after being cooled, the clay is heated to 60 ℃ and is kept warm for 50 minutes, then, the clay is heated to 500 ℃ and is kept warm for 1.5 hours, the smashed clay is soaked in a 1mol/L sodium hydroxide solution for 40 minutes after being cooled, and is dried to prepare pretreated clay, polyvinyl alcohol is dissolved in absolute ethyl alcohol to prepare a polyvinyl alcohol solution with the concentration of 5 weight percent, and then the pretreated clay is added into the pretreated clay, wherein the weight of the pretreated clay is 65 weight percent of the polyvinyl alcohol solutionThen ball milling for 1 hour, cleaning and drying to obtain treated clay, then soaking the treated clay in the microorganism suspension for 3 hours, and drying at low temperature to obtain immobilized microorganisms; the microorganism suspension is composed of Bacillus subtilis and nitrobacillus, and the viable bacteria colony number of the Bacillus subtilis is 1.0 × 107cfu/mL, viable bacterial colony count of Nitrobacter 8.0 × 106 cfu/mL。
Example 2
The apparatus of this example is identical in part to example 1, except that:
adding first water treatment agent polyaluminium sulfate into the wastewater milk breaking tank, adding second water treatment agent immobilized microorganisms into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and adding third water treatment agent manganese dioxide into the anaerobic biochemical treatment tank.
The immobilized microorganism is prepared by the following method, firstly, clay is smashed to have the median particle size of 0.07mm, then, the smashed clay is calcined at the temperature of 420 ℃ for 0.7 hour and is cooled, and is soaked in a saturated sodium hydroxide solution until the smashed clay is saturated, the clay is heated to 65 ℃ and is kept warm for 55 minutes, then, the clay is heated to 550 ℃ and is kept warm for 1.7 hours, after being cooled, the clay is soaked in a 1.2mol/L sodium hydroxide solution for 45 minutes and is dried to prepare pretreated clay, polyvinyl alcohol is dissolved in absolute ethyl alcohol to prepare a polyvinyl alcohol solution with the concentration of 5.2wt%, then, the pretreated clay is added into the pretreated clay, the weight of the pretreated clay is 75wt% of the polyvinyl alcohol solution, then, the pretreated clay is subjected to ball milling treatment for 1.2 hours, the treated clay is prepared after being washed and dried, then, the treated clay is soaked in a microorganism suspension for 3.5 hours, and the immobilized microorganism is prepared after low-temperature drying; the microorganism suspension is composed of Bacillus subtilis and nitrococcus, and the viable bacteria colony number of the Bacillus subtilis is 3.0 × 107cfu/mL, viable bacterial colony count of Nitrococcus was 6.0X 106 cfu/mL。
Example 3
The apparatus of this example is identical in part to example 1, except that:
adding first water treatment agent polyaluminium sulfate into the wastewater milk breaking tank, adding second water treatment agent immobilized microorganisms into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and adding third water treatment agent manganese dioxide into the anaerobic biochemical treatment tank.
The immobilized microorganism is prepared by the following method, firstly, clay is smashed to have the median particle size of 0.08mm, then, the smashed clay is calcined at 430 ℃ for 0.7 hour and is soaked in a saturated sodium hydroxide solution after being cooled, the smashed clay is heated to 75 ℃ and is kept warm for 55 minutes, then, the smashed clay is heated to 550 ℃ and is kept warm for 2.3 hours, the smashed clay is soaked in a 1.3mol/L sodium hydroxide solution for 55 minutes after being cooled, the smashed clay is dried to prepare pretreated clay, polyvinyl alcohol is dissolved in absolute ethyl alcohol to prepare a polyvinyl alcohol solution with the concentration of 5.8wt%, then, the pretreated clay is added into the smashed clay, the weight of the pretreated clay is 85wt% of the polyvinyl alcohol solution, then, the pretreated clay is subjected to ball milling treatment for 1.8 hours, the treated clay is prepared after being washed and dried, then, the treated clay is soaked in a microorganism suspension for 4.5 hours, and the immobilized microorganism is prepared after low-temperature drying; the microbial suspension is composed of Bacillus licheniformis and Nitrospira, and the viable bacteria colony number of the Bacillus licheniformis is 1.0 × 107～1.0×108cfu/mL, the number of viable bacteria colonies of Nitrospira sp.nitrosum was 5.0X 106～8.0×106 cfu/mL。
Example 4
The apparatus of this example is identical in part to that of example 1, with the following differences:
adding a first water treatment agent polyvinyl alcohol into the wastewater demulsification tank, adding a second water treatment agent immobilized microorganism into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and adding a third water treatment agent phosphoric acid into the anaerobic biochemical treatment tank.
The immobilized microorganism is prepared by the following method, firstly, crushing clay to the median particle size of 0.1mm, then calcining the crushed clay at 450 ℃ for 1.0 hour, cooling, soaking in saturated sodium hydroxide solution until the clay is saturated, heating the clay to 80 ℃ and keeping the temperature for 60 minutes, then heating to 600 ℃ and keeping the temperature for 2.5 hours, cooling, soaking in 1.5mol/L sodium hydroxide solution for 60 minutes, drying to prepare pretreated clay, dissolving polyvinyl alcohol in absolute ethyl alcohol to prepare 6wt% polyvinyl alcohol solution, and then dissolving the polyvinyl alcohol in the absolute ethyl alcohol to prepare the polyvinyl alcohol solution with the concentration of 6wt%, wherein the polyvinyl alcohol solution is prepared by the steps of crushing the clay to the median particle size of 0.1mm, calcining the crushed clay at 450 ℃ for 1.0 hour, cooling, soaking in the saturated sodium hydroxide solution to the saturated sodium hydroxide solution, heating the clay to the temperature for 60 minutes, heating the clay to the temperature, then heating to the temperature to the 600 ℃ and keeping the temperature for 2.5 hours, cooling, soaking in the sodium hydroxide solution for 60 minutes, drying to prepare the pretreated clay, dissolving the polyvinyl alcohol solution in the polyvinyl alcohol solution, and dissolving the polyvinyl alcohol solution in the absolute ethyl alcohol solution, and then dissolving the polyvinyl alcohol solution to prepare the polyvinyl alcohol solution with the concentration of 6wt% in the polyvinyl alcohol solutionAdding pretreated clay into the mixture, performing ball milling treatment for 2 hours, cleaning and drying to obtain treated clay, soaking the treated clay in a microorganism suspension for 5 hours, and drying at low temperature to obtain immobilized microorganisms; the microbial suspension is composed of Bacillus licheniformis and nitrosococcus, and the number of viable bacteria colony of Bacillus licheniformis is 1.0 × 108cfu/mL, the number of viable bacteria colonies of Nitrosococcus was 5.0X 106cfu/mL。
The wastewater treatment effect is as follows:
according to the wastewater treatment process, the process wastewater with COD not more than 12000mg/L and ammonia nitrogen not more than 200mg/L can be converted into qualified initial treatment wastewater (namely, COD not more than 50mg/L and ammonia nitrogen not more than 20 mg/L) only by one-time treatment; the suspended matters after reverse osmosis treatment can be reduced to 50mg/L or below, COD can be further reduced to 40mg/L or below, and ammonia nitrogen can be further reduced to 15mg/L or below.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (7)

1. An industrial wastewater treatment process is characterized in that:
the industrial wastewater stored in the wastewater collection tank sequentially passes through a wastewater milk breaking tank, a first aerobic biochemical treatment tank, an electrolytic tank, an anaerobic biochemical treatment tank, a second aerobic biochemical treatment tank and a sedimentation tank to obtain primary treatment wastewater, the primary treatment wastewater is collected into the collection tank, the primary treatment wastewater qualified in detection is collected into a circulating water cooling tank, and the primary treatment wastewater passes through a reverse osmosis treatment device to obtain treatment wastewater which is stored in a water storage tank; the primary treatment wastewater which is detected to be unqualified in the collection tank is converged into a first aerobic biochemical treatment tank for continuous treatment; a first water treatment agent is added into the wastewater demulsification tank, a second water treatment agent is added into the first aerobic biochemical treatment tank and the second aerobic biochemical treatment tank, and a third water treatment agent is added into the anaerobic biochemical treatment tank;
the second water treatment agent is immobilized microorganism;
the immobilized microorganism is prepared by the following method, firstly, clay is smashed to have a median particle size of 0.05-0.1 mm, then, the smashed clay is calcined at 400-450 ℃ for 0.5-1.0 hour, cooled and then soaked in a saturated sodium hydroxide solution until being saturated, the clay is heated to 60-80 ℃ and is kept warm for 50-60 minutes, then, the clay is heated to 500-600 ℃ and is kept warm for 1.5-2.5 hours, after being cooled, the clay is soaked in a 1-1.5 mol/L sodium hydroxide solution for 40-60 minutes and dried to prepare pretreated clay, polyvinyl alcohol is dissolved in absolute ethyl alcohol to prepare a polyvinyl alcohol solution with a concentration of 5-6 wt%, then, the pretreated clay is added into the solution, the weight of the pretreated clay is not less than 65wt% of the polyvinyl alcohol solution, then, ball milling treatment is carried out for 1-2 hours, treated clay is prepared after being cleaned and dried, then, treated clay is soaked in a microorganism suspension for 3-5 hours, drying at low temperature to obtain immobilized microorganism;
the microorganism suspension is composed of bacillus and nitrobacteria;
in the microorganism suspension, the number of viable bacteria colony of bacillus is 1.0 multiplied by 107～1.0×108cfu/mL, viable bacterial colony count of nitrifying bacteria 5.0X 106～8.0×106cfu/mL。
2. The industrial wastewater treatment process according to claim 1, characterized in that:
and a stirring device is arranged in the wastewater milk breaking pool.
3. The industrial wastewater treatment process according to claim 1, characterized in that:
and (3) recovering sludge after the sediment in the sedimentation tank is treated by a filter press, and converging the outlet water of the filter press into a collection tank.
4. The industrial wastewater treatment process according to claim 1, characterized in that:
the first water treatment agent is at least one of aluminum sulfate, polyaluminum sulfate or polyvinyl alcohol; the third water treatment agent is at least one of sodium hypophosphite, manganese dioxide or phosphoric acid.
5. The industrial wastewater treatment process according to claim 1, characterized in that:
and the COD of the primary treatment wastewater in the collecting tank is not more than 50mg/L and the ammonia nitrogen is not more than 20mg/L, and the primary treatment wastewater is qualified in detection, otherwise, the primary treatment wastewater is unqualified in detection.
6. The industrial wastewater treatment process according to claim 1, characterized in that:
the bacillus is at least one of bacillus subtilis or bacillus licheniformis.
7. The industrial wastewater treatment process according to claim 1, characterized in that:
the nitrifying bacteria are at least one of nitrifying bacillus, nitrococcus, nitrosospira or nitrosococcus.
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CN105399271B (en) * 2015-11-17 2019-04-09 罗依依 Oily phenol recycling and wastewater treatment regenerating unit and method in oil extraction waste water
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