CN111392958B - Sewage treatment process for reducing sludge production - Google Patents

Sewage treatment process for reducing sludge production Download PDF

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CN111392958B
CN111392958B CN201911398697.1A CN201911398697A CN111392958B CN 111392958 B CN111392958 B CN 111392958B CN 201911398697 A CN201911398697 A CN 201911398697A CN 111392958 B CN111392958 B CN 111392958B
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CN111392958A (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
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • 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
    • C02F1/4606—Treatment of water, waste water, or sewage by electrochemical methods for producing oligodynamic substances to disinfect the water
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • 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
    • C02F3/02—Aerobic processes
    • 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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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
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  • Water Treatment By Electricity Or Magnetism (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment process for reducing sludge generation aiming at the problem that a large amount of filter residue sludge is generated in the wastewater treatment in the production of chemical reagents for the paper making industry. After two aerobic microbial treatments, one electrolysis treatment and one anaerobic microbial treatment, the sedimentation tank is settled, compressed and filtered, and positive charge carriers and high-voltage static electricity treatment are introduced in the secondary aerobic treatment, so that a large amount of toxic and harmful substances and the like are decomposed and utilized by the microbes, the production amount of filter residue sludge is reduced, and the content of the toxic and harmful substances is reduced.

Description

Sewage treatment process for reducing sludge production
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment process for reducing sludge generation.
Background
In the papermaking industry, a large number of chemicals such as dispersants, lubricants, surface sizing agents, water retention agents, wet strength dissociation agents and the like are used. These chemicals are produced in large amounts of sewage during development and production, and mainly contain organic substances such as acrylic esters. At present, the treatment method of the sewage is to put the wastewater into a wastewater demulsification pool for demulsification treatment and then directly put the wastewater into a filter press for pressure filtration treatment, although the pollutants and the water can be effectively separated, a large amount of filter residue sludge generated by the filter press brings subsequent treatment problems: the amount of the filter residue and sludge is large, the content of toxic and harmful substances is high, the subsequent treatment workload is large, the cost of a sewage treatment process is increased, and a secondary environmental problem is caused. How to reduce the generation amount of the sludge in the sewage treatment process has important significance for reducing the cost of sewage treatment and improving the sewage treatment efficiency.
Chinese patent CN201510043063.X, the patent name "a sewage treatment system", discloses a sewage treatment system, including aerator, back flush system and aeration tank; each aeration tank is internally provided with an aeration disc; elastic fillers are arranged in the first aeration tank and the second aeration tank, composite ball fillers are arranged in the third aeration tank and the fourth aeration tank, honeycomb fillers are arranged in the fifth aeration tank and the sixth aeration tank, biological film fillers are arranged in the seventh aeration tank and the eighth aeration tank, and ceramic pipes are arranged in the ninth aeration tank; a water inlet pipe is arranged on the first aeration tank, and a water outlet pipe is arranged on the ninth aeration tank; a first water return pump is arranged in the fifth aeration tank, and is connected with a first water return pipe; and a second water return pump is arranged in the eighth aeration tank, and a second water return pipe is connected to the second water return pump. The treatment system has good effect on removing sulfurated plankton, but has no obvious effect on reducing the generation of sludge.
Disclosure of Invention
Aiming at the problem that a large amount of filter residue sludge is generated in the wastewater treatment in the production of chemical reagents for the papermaking industry, the invention aims to provide a water treatment process for reducing the generation of sludge, which is used for treating toxic and harmful substances such as organic matters and the like in wastewater so as to reduce the generation of filter residue sludge.
The invention provides the following technical scheme:
a sewage treatment process for reducing sludge production comprises the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, and adding a demulsifier for demulsification treatment;
(2) primary aerobic treatment: introducing the demulsified wastewater into a front aerobic biochemical treatment tank for treatment;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment;
(5) secondary aerobic treatment: feeding the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
The sewage treatment process comprises the steps of sequentially performing waste water demulsification, aerobic microorganism treatment, electrolysis treatment, anaerobic microorganism treatment and aerobic microorganism treatment on the collected waste water, then performing precipitation in a precipitation tank, compressing and filtering, wherein the waste water collection tank collects waste water generated in laboratories, product storage workshops, production workshops, product barrels, recycling and cleaning and the like in the research and development and production processes of chemical reagents, and the waste water contains a large amount of organic matters such as acrylic ester and the like and toxic and harmful substances. After the treatment by the process, the organic matters and the toxic and harmful substances are consumed by microorganisms, so that the discharge amount is greatly reduced, part of finally generated sludge is microbial excrement and the microorganisms, and the relative content of the toxic and harmful substances is also obviously reduced. Therefore, compared with the prior art that the filter residue sludge is obtained by directly filtering the waste water after demulsification treatment, the sewage treatment process reduces the generation amount of the filter residue sludge and reduces the content of toxic and harmful substances in the filter residue sludge.
As an improvement of the method, the microorganisms added into the front aerobic biochemical treatment tank and the rear aerobic biochemical treatment tank are one or two of spore bacteria and cocci. The spore bacteria and the cocci have strong environment resistance, low nutritional requirement and strong resistance to external harmful factors.
As a modification of the method of the invention, the demulsifier added in the step (1) is one or more of aluminum sulfate, polyaluminum sulfate and polyacrylamide. Adding aluminum sulfate, polyaluminum sulfate or polyacrylamide to flocculate and separate suspended matters in the wastewater, breaking an emulsified state, increasing the oxygen content in the wastewater, and preparing for subsequent microbial treatment, wherein the adding amount of the wastewater is 50-500 mg/l.
As an improvement of the method, step (4) also comprises adding one or two of sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank. Manganese dioxide can adsorb and oxidize metal and non-metal ion pollutants and organic matters in the wastewater and catalyze the degradation process of the organic matters in the wastewater, and the addition amount of the manganese dioxide is 13-14 mg/l of the wastewater; the sodium hypophosphite can oxidize and reduce metal ions in the water, and the addition amount of the sodium hypophosphite is 10-11 mg/l of wastewater.
As an improvement of the method, the step (5) further comprises the step of adding one of aluminum magnesium hydroxide positive electricity glue and hydrotalcite into a rear aerobic biochemical pool, wherein the adding amount is 8-15 g/L. The organic matters in the wastewater are mainly acrylate and the like, so that the wastewater contains a large amount of functional groups with negative charges, such as carboxyl and the like; meanwhile, the surfaces of bacteria including spores and cocci are coated with a capsular or mucilaginous layer formed by a large number of exopolysaccharides, which are mostly negatively charged. Therefore, the aluminum magnesium hydroxide positive glue or the hydrotalcite with positive charges is put into the wastewater to serve as a positive charge carrier, so that bacteria are simultaneously loaded on the surface of the aluminum magnesium hydroxide positive glue or the hydrotalcite by virtue of the extracellular polysaccharide and the organic matters, microbial micelles are promoted to be formed, the contact of the bacteria and the organic matters is greatly enhanced compared with the direct putting of the bacteria, and the decomposition and utilization of the bacteria to the organic matters are promoted.
The improvement of the method of the invention also comprises introducing a high-voltage electrostatic field into the wastewater treated in the step (4) before the step (5), wherein the voltage of the high-voltage electrostatic field is 20-40 kV, and the current is 0.4-1A. On one hand, the waste water after anaerobic treatment contains a large amount of anaerobic bacteria and a large amount of mixed bacteria, and the spore bacteria and the cocci which are put in advance do not have advantages. On the other hand, the wastewater contains part of nonpolar molecules besides organic substances such as acrylate, so that the utilization rate of bacteria is low. Therefore, a high-voltage electrostatic field is further introduced into the wastewater, on one hand, ozone is provided to oxidize organic matters, the content of negative charge organic functional groups such as carboxyl and the like in the wastewater is increased, on the other hand, the high-voltage electrostatic field plays a role in sterilization, a large amount of mixed bacteria including filamentous bacteria in the wastewater treated by the anaerobic biochemical tank are killed, and the mixed bacteria grow in the aerobic biochemical tank after being bacteriostatic and sludge expansion of microbial micelles is carried out, so that the wastewater is purified; meanwhile, high-voltage static electricity also introduces a large amount of charges in the wastewater, and promotes the dissociation of acid ester and the like.
The improvement of the method provided by the invention further comprises the step of introducing ozone or adding potassium permanganate into the wastewater treated in the step (4) before the step (5), wherein the adding amount is 0.4-1.5 mg/L. The ozone or potassium permanganate is directly added into the wastewater, so that the generation of negative charge functional groups in the wastewater can be enhanced to a certain extent, and the formation of microbial micelles and the decomposition of organic matters and harmful substances in the aerobic biochemical tank are promoted.
The invention has the following beneficial effects:
according to the wastewater treatment process, the wastewater is demulsified, subjected to two aerobic microbial treatments, one electrolytic treatment and one anaerobic microbial treatment, then precipitated in the sedimentation tank, and then compressed and filtered, so that a large amount of toxic and harmful substances and the like are decomposed and utilized by the microbes, the generation amount of filter residue sludge is reduced, and the content of the toxic and harmful substances is reduced. Meanwhile, according to the composition characteristics of the chemical reagent wastewater for papermaking, positive charge carriers and high-voltage electrostatic treatment are introduced into a rear aerobic biochemical tank, and deep flocculation and decomposition treatment of organic matters are carried out by promoting the formation of microbial micelles, so that the amount of the organic matters is further reduced, and the discharge of sludge is reduced.
Detailed Description
The following further describes the embodiments of the present invention.
The starting materials used in the present invention are commercially available or commonly used in the art, unless otherwise specified, and the methods in the following examples are conventional in the art, unless otherwise specified.
Comparative example 1 improved pretreatment Process
A sewage treatment process for reducing sludge production comprises the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) compression and filtration: introducing the wastewater after the demulsification treatment into a plate-and-frame filter press for filter pressing treatment, and collecting filter residue sludge;
(3) aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganism is a mixed microbial inoculum of spore bacteria and cocci, and the addition amount is 0.5kg/m3The total number of bacteria is 1.2 × 106 CFu/g, the addition ratio of the spore bacteria to the cocci is 2: 1;
(4) electrolytic treatment: introducing the wastewater treated in the step (3) into an electrolytic cell for treatment;
(5) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(6) and (3) precipitation: and (4) sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, and then introducing into a qualified wastewater tank for discharge after being detected to be qualified.
The sludge produced in the process is the filter residue sludge in the step (2) and the sediment in the sedimentation tank in the step (6).
Example 1
A sewage treatment process for reducing sludge production comprises the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 48%, the content of acrylic ester in the sludge is reduced to 30% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 2
A sewage treatment process for reducing sludge production comprises the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyacrylamide, and the dosage of the demulsifier is 50mg/L of wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are spore bacteria agents, and the total bacteria number is 1.5 multiplied by 106 CFu/g, in an amount of 0.9kg/m3；
(3) Electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 11mg/L of the wastewater, and the adding amount of the manganese dioxide is 14mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are spore bacteria, and the total bacteria number is 1.5 multiplied by 106 CFu/g, in an amount of 0.9kg/m3；
(6) And (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 50%, the content of acrylic ester in the sludge is reduced to 27% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 3
A sewage treatment process for reducing sludge production comprises the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is aluminum sulfate and the dosage of the aluminum sulfate is 500mg/L of wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are cocci, and the total bacteria number is 2 multiplied by 106 CFu/g, in an amount of 1.1kg/m3；
(3) Electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are cocci, and the total bacteria number is 2 multiplied by 106 CFu/g, in an amount of 1.1kg/m3；
(6) And (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the generation amount of the sludge is relatively reduced by 46%, the content of acrylic ester in the sludge is reduced to 32% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 4
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding the aluminum-magnesium hydroxide positive electricity glue into a rear aerobic biochemical pool, wherein the adding amount is 8 g/L;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge mainly comes from the sediment after the treatment of the sedimentation tank, except positive charge carrier aluminum-magnesium hydroxide positive glue (the same as the following example), the production amount of the sludge is relatively reduced by 52 percent, the content of acrylic ester in the sludge is reduced to 24 percent from 47 percent by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 5
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 15g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 55%, the content of acrylic ester in the sludge is reduced to 21% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 6
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 54 percent, the content of acrylic ester in the sludge is reduced to 23 percent from 47 percent by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 7
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the spore bacteria and the cocci in a ratio of 2:1, and simultaneously adding 12g/L of talcum powder into the post-aerobic biochemical tank;
(6) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(7) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 51%, the content of acrylic ester in the sludge is reduced to 25% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 8
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) high-voltage electrostatic treatment: introducing a high-voltage electrostatic field into the wastewater treated in the step (4), wherein the voltage of the high-voltage electrostatic field is 40kV, the current is 1A, the duration is 30s, and the interval time is 15 min;
(6) secondary aerobic treatment: sending the wastewater treated in the step (5) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(7) and (3) precipitation: sending the wastewater treated in the step (6) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the generation amount of the sludge is relatively reduced by 63%, the content of acrylic ester in the sludge is reduced to 10% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 9
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) high-voltage electrostatic treatment: introducing a high-voltage electrostatic field into the wastewater treated in the step (4), wherein the voltage of the high-voltage electrostatic field is 20kV, the current is 0.6A, the duration is 40s, and the interval time is 15 min;
(6) secondary aerobic treatment: sending the wastewater treated in the step (5) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(7) and (3) precipitation: sending the wastewater treated in the step (6) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the generation amount of the sludge is relatively reduced by 59%, the content of acrylic ester in the sludge is reduced to 15% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 10
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) high-voltage electrostatic treatment: introducing a high-voltage electrostatic field into the wastewater treated in the step (4), wherein the voltage of the high-voltage electrostatic field is 30kV, the current is 0.4A, the duration is 60s, and the interval time is 20 min;
(6) secondary aerobic treatment: sending the wastewater treated in the step (5) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(7) and (3) precipitation: sending the wastewater treated in the step (6) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 60%, the content of acrylic ester in the sludge is reduced to 13% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 11
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) oxidation treatment: introducing ozone into the wastewater treated in the step (4) to maintain the concentration at 0.4 mg/L;
(6) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(7) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 56%, the content of acrylic ester in the sludge is reduced to 19% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 12
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) oxidation treatment: introducing ozone into the wastewater treated in the step (4) to maintain the concentration at 1.5 mg/L;
(6) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and coccus, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3Spores ofThe adding ratio of bacteria to cocci is 2:1, and simultaneously, the aluminum magnesium hydroxide positive electricity glue is added into a rear aerobic biochemical pool, and the adding amount is 12 g/L;
(7) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is reduced by 57%, the content of acrylic ester in the sludge is reduced to 17% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.
Example 13
A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, adding a demulsifier for demulsification treatment, wherein the demulsifier is polyaluminium sulfate, and the dosage of the demulsifier is 350mg/L wastewater;
(2) primary aerobic treatment: introducing the compressed and filtered wastewater into an aerobic biochemical treatment tank for treatment, wherein the used microorganisms are mixed microbial inoculum of spore bacteria and cocci, and the total number of the bacteria is 1.2 multiplied by 106 CFu/g, in an amount of 0.5kg/m3The adding ratio of the spore bacteria to the cocci is 2: 1;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment, and simultaneously adding sodium hypophosphite and manganese dioxide into the anaerobic biochemical treatment tank, wherein the adding amount of the sodium hypophosphite is 10mg/L of the wastewater, and the adding amount of the manganese dioxide is 13mg/L of the wastewater;
(5) oxidation treatment: adding potassium permanganate into the wastewater treated in the step (4) to maintain the concentration to be 0.4 mg/L;
(6) secondary aerobic treatment: sending the wastewater treated in the step (4) into a post-aerobic biochemical treatment tank for secondary aerobic treatmentThe microorganism is a mixed bacterial agent of spore bacteria and cocci, and the total bacterial count is 1.2 × 106 CFu/g, in an amount of 0.5kg/m3Adding the ratio of spore bacteria to coccus is 2:1, and simultaneously adding 12g/L of aluminum-magnesium hydroxide positive gel into a rear aerobic biochemical pool;
(7) and (3) precipitation: sending the wastewater treated in the step (5) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: and (3) detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for good oxidation treatment again.
Compared with the comparative example 1, the sludge is mainly derived from the sediment treated by the sedimentation tank, the production amount of the sludge is relatively reduced by 56%, the content of acrylic ester in the sludge is reduced to 18% from 47% by weight in the comparative example 1, the COD of the treated wastewater is less than 50, and the ammonia nitrogen is less than 20.

Claims (3)

1. A sewage treatment process for reducing sludge production is characterized by comprising the following steps:
(1) demulsifying: sending the collected wastewater into a wastewater demulsification pool, and adding a demulsifier for demulsification treatment;
(2) primary aerobic treatment: introducing the demulsified wastewater into a front aerobic biochemical treatment tank for treatment;
(3) electrolytic treatment: introducing the wastewater treated in the step (2) into an electrolytic cell for treatment;
(4) anaerobic treatment: introducing the electrolyzed wastewater into an anaerobic biochemical treatment tank for treatment;
(5) high-voltage electrostatic treatment: introducing a high-voltage electrostatic field into the wastewater treated in the step (4), wherein the voltage of the high-voltage electrostatic field is 20-40 kV, and the current is 0.4-1A;
(6) secondary aerobic treatment: feeding the wastewater treated in the step (5) into a post-aerobic biochemical treatment tank for secondary aerobic treatment;
(7) and (3) precipitation: sending the wastewater treated in the step (6) into a sedimentation tank for sedimentation, then introducing into a filter press for filter pressing, and collecting sludge;
(8) subsequent purification: detecting the effluent of the filter press, if the effluent is qualified, sending the effluent to a subsequent membrane treatment process, and if the effluent is not qualified, sending the effluent to the step (2) for aerobic treatment again;
and (6) adding one of aluminum magnesium hydroxide positive electrode glue and hydrotalcite into the backward aerobic biochemical pool, wherein the adding amount is 8-15 g/L.
2. The sewage treatment process for reducing sludge production according to claim 1, wherein the demulsifier added in step (1) is one or more of aluminum sulfate, polyaluminum sulfate and polyacrylamide.
3. The process of claim 1, wherein step (4) further comprises adding one or both of sodium hypophosphite and manganese dioxide to the anaerobic biochemical treatment tank.
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Citations (3)

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Publication number Priority date Publication date Assignee Title
CN106219893A (en) * 2016-08-31 2016-12-14 重庆融极环保工程有限公司 A kind of well-drilling waste water processes technique
WO2017067161A1 (en) * 2015-10-20 2017-04-27 波鹰(厦门)科技有限公司 Treatment device and method for oil extraction wastewater
CN109399862A (en) * 2018-11-07 2019-03-01 四川众兴汽车零部件有限公司 A kind of industrial wastewater treatment system and its processing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017067161A1 (en) * 2015-10-20 2017-04-27 波鹰(厦门)科技有限公司 Treatment device and method for oil extraction wastewater
CN106219893A (en) * 2016-08-31 2016-12-14 重庆融极环保工程有限公司 A kind of well-drilling waste water processes technique
CN109399862A (en) * 2018-11-07 2019-03-01 四川众兴汽车零部件有限公司 A kind of industrial wastewater treatment system and its processing method

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