CN105776684A - Urban sewage treatment and resource recycling method - Google Patents
Urban sewage treatment and resource recycling method Download PDFInfo
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- CN105776684A CN105776684A CN201610320765.2A CN201610320765A CN105776684A CN 105776684 A CN105776684 A CN 105776684A CN 201610320765 A CN201610320765 A CN 201610320765A CN 105776684 A CN105776684 A CN 105776684A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention relates to an urban sewage treatment and resource recycling method, which mainly includes three steps, i.e., sewage pretreatment, electrochemical treatment and precipitation treatment and resource utilization. The method can purify and recycle polluted water, and can transform, reduce and then recycle precipitated waste residue (sludge) as a resource to produce trace element biological humic acid organic fertilizer for sale for profit. When the method is adopted to electrochemically treat sewage, polymer flocculant polyacrylamide does not need to be used, electric energy is mainly consumed, 0.1 kwh of electricity or less is consumed by the treatment of each ton of sewage, and thereby sewage treatment cost is reduced by 30 percent or more; more outstandingly, the production of sludge is reduced by more than 50 percent, moreover, the viscosity of the sludge is greatly removed, so that the state of water wrapped in a sticky film of waste residue cannot occur, furthermore, sludge can be easily separated out and dehydrated by filter pressing, so that the moisture content of sludge can be decreased to less than 50 percent, consequently, two major problems, i.e., difficulty in using discharged water and toxic sludge siege, are solved, and recycling economic benefit is also created.
Description
Technical field
The present invention relates to technical field of sewage, be specifically related to a kind of urban wastewater treatment and the method for resource recycling utilization.
Background technology
China is the country of shortage of water resources, and currently, increasingly serious water environment pollution and shortage of water resources problem seriously constrain the development of China's economic society.Municipal sewage is carried out purified treatment, makes up to the purpose of recycling, substantial amounts of water resource can be saved.Urban wastewater treatment firm, carries the process heavy burden of overwhelming majority sewage (mainly sanitary sewage) in city, and degrades in subtractive process at water pollutant, will necessarily constantly produce again large number of waste residue mud, it is necessary to be acted upon.Urban wastewater treatment firm sewage source, it is mostly the sanitary sewage of office, unit, school, hospital, army, restaurant, resident etc., in addition, there may also be enterprise of indivedual factory and process the industrial wastewater of (COD is about 400mg/L) still not up to standard, also it is discharged to after sewage treatment plant reprocesses (or dilution), discharges in the lump.Therefore, entering the sewage that Sewage Plant processes, composition is more complicated, both containing organic substance, inorganic substances, also contains heavy metal, chemical substance, also has pathogenic bacteria virus spore harmful substance etc..Deal with, take certain single technology or certain Water purification medicament, be all difficult to process thoroughly, it is achieved real meaning up to standard.
Method for urban wastewater treatment has a variety of, generally can be divided into following three major types: Physical, chemical method and bioanalysis.Physical is usually and processes sewage by modes such as filtration, precipitation, air supportings, filter, the sedimentation method have the advantages such as disengaging time is short, device is simple, treating capacity is big, but require higher to processing equipment performance, investment cost and operating cost are also higher, the operating conditions such as the treatment effeciency of By Bubble-floating Method and feed entrance point, air inflow, liquid level, gas floatation agent consumption are closely related, operation management is complicated, and can only process the waste water of muddiness, it is impossible to process the waste water high containing toxic chemical substance and concentration；Chemical method is generally by adding specific chemical reagent, such as flocculant, chelating agent or acid-alkali treatment agent, element poisonous in water is processed, have that capital expenditure is few, technique simple, processing ease, energy consumption are low, change strong adaptability to temperature, but shortcoming is also that comparison is single, and cost is high, the organic wastewater of the complicated high concentration of content can not be processed, especially the organic clearance of waste water small molecular is lower, generally require and combine use with other processing method, waste water could qualified discharge；Bioanalysis is one of process technique the most ripe, reliable, and in bioremediation, most widely used with activated sludge process again, effect is preferably.Activated Sludge Process is adopted to process sanitary sewage, there is effluent quality better, system running and comparing is stable, the more high obvious advantage for the treatment of effeciency, but also there is certain limitation: the volume processing structures is bigger simultaneously, investment cost is significantly high, and the adaptability of system impact load (pollutant burden of sewage amplifies at double suddenly or diminishes) is poor, produce substantial amounts of excess sludge to need to carry out process etc., more there is a prominent worth serious phenomenon improving attention, it is exactly in Biochemical method town sewage process, nitrogen, the indexs such as phosphorus usually easily exceed standard and are difficult to solve.
Current treatment of town sewage and sludge processes, it is common to adopt machinery every slag, biochemical degradation, the conventional process techniques such as medicament purifies, and materialization is flocculated, filter-press dehydration, can effectively degrade the indexs such as COD, SS, but it is undesirable to degrade, it is common to there is situations below: 1, degraded is difficult thoroughly: general pollutant can remove, and to those transparent chain cyclic macromolecular compound being dissolved in water, then helpless, effluent quality does not reach target water and can not recycle, and have to discharge, significantly waste water resource.2, mud difficulty dehydration: sewage disposal will necessarily produce substantial amounts of mud, it can be described as " resource mislayed ", current nearly all field sewage disposal (including industrial wastewater), when carrying out water, slag separation, all adopt high polymer coagulant polyacrylamide bar none, the advantages such as it has use simple, effective and rapid, but, its separation process, it it is the contaminant molecule encasing in water with its macromolecule mucosa, especially such as the soft gelatin capsule of Bao Shui, it is adhesively-bonded together to form colloidal state group and is separated from water, precipitate into rapidly mud and precipitate out.Just owing to its " mucosa Bao Shui " difficulty crushes the fatal negative interaction of sad filter, causing sludge dewatering efficiency extreme difference, the moisture content of filtering residue mud, up to 70 80%, causes extreme difficulties to deep processing recycling, and the too high processing of having no idea of moisture uses.Banking up dry, top layer seems to have done the inside also like sugar heart egg, can not use at all, and foul smell disturbs residents to cause and again pollutes.Heating, drying, consumes mass energy more uneconomical.So, a sludge dewatering difficult problem has become insurmountable barrier simply.
As mentioned above, the problem that the various processing methods of current urban wastewater treatment not can solve " degraded is thoroughly " and " Treatment of Sludge ", so a lot of chemistry, biology and environmental science worker are at the sewage water treatment method of continuous comprehensive study in recent years, it is as follows that we retrieve relevant part document:
1, Chinese patent, application number: 201410361603.4, denomination of invention: a kind of method of sewage disposal, patentee: Mengzi Mining and Metallurgy Co., Ltd., address: Mengzi city, Hani-Yi Autonomous Prefecture of Honghe, Yunnan Province sky road 66, summary: a kind of method of sewage disposal, belongs to environmental protection metallurgical technology field.The preprocessing process of sewage: first waste acid and sewage are neutralized, send comprehensive slag storehouse by supernatant siphon after physics settles the treatment fluid after neutralizing, then being sent to concentrator precipitation after coagulating sedimentation, reduction supernatant hardness and obtain filter-press residues and pressing filtering liquid through pressure filter filter pressing, filter-press residues returns to comprehensive slag storehouse；The advanced treating of sewage: the pressing filtering liquid obtained is obtained electrochemical treatments liquid after electrolytic oxidation, electroreduction, electrolytic flocculation and electrofloatation electrochemical process process；Electrochemical treatments liquid removes float in water through air supporting, then through filtration with manganese sand, activated carbon adsorption after obtain filtrate；Filtrate carries out process through membranous system and obtains qualified discharge water quality, and wherein membranous system includes nanofiltration, high pressure reverse osmosis, low pressure reverse osmosis three groups.The method concentrator waste residue amount reduces, and cleaning cycle extends, and cost reduces, and extends the sedimentation time for the treatment of fluid simultaneously, and water turbidity reduces.
2, Chinese patent, application number: 201410069088.2, denomination of invention: a kind of electrochemistry synchronous denitrification dephosphorizing device and method for the treatment of city waste water, patentee: Ecological Environment Research Center, Chinese Academy of Sciences, address: No. 18, Shuangqing Road, Haidian District, Beijing City, summary: a kind of electrochemistry synchronous denitrification dephosphorizing device and method for the treatment of city waste water, belongs to technical field of sewage.The steady electrode of shape commonly used in electrochemical water treatment technology, iron electrode, aluminum electrode, magnesium electrode and copper are modified stainless steel electrode combination; the denitrogenation dephosphorizing that can carry out municipal sewage in same electrolyzer processes; apparatus structure is simple; easy to operate; efficiency is high; good in nitrate nitrogen removal effect, it may be achieved scale, automated sewage process.This invention method for the treatment of city waste water technique is simple, easy to operate, saves human and material resources, and energy consumption is low, and sewage pollution index clearance is high, municipal sewage index COD, nitrate nitrogen, ammonia nitrogen, total phosphorus clearance respectively reach more than 92%.
3, Chinese patent, application number: 201210232453.8, denomination of invention: the process technique of a kind of electrochemistry direct oxidation mud, patentee: Changzhou Expansion New Stuff Technology Co., Ltd., address: building, trimorphism industry park the 1st, Road, the Changjiang river, Xinbei district, Jiangsu Province 25, summary: the process technique of a kind of electrochemistry direct oxidation mud, have employed two-stage electrochemistry direct oxidation technology and the mud of moisture content 99.6% is carried out oxidation Decomposition process, excess sludge reduction is made to reach more than 95%, can be widely used for city domestic sewage treatment plant, urban comprehensive wastewater treatment plant, the Treatment of Sludge of city chemical industry sewage treatment plant and disposal, offer cleaning is disposed in safe handling for mud, the solution of low energy consumption.
The above-mentioned method processing sewage or lignin-sludge retrieved, it is all pointed sewage being processed or again the mud (filtering residue) produced after sewage disposal is processed, document 1 described above and document 2, although after sewage disposal, sewage pollution index clearance is high, but the technical process of the two method is not mentioned to this problem how to process of filtering residue (mud) produced in sewage disposal process, therefore still can produce substantial amounts of excess sludge to need to process, and the problem that also can there is mud difficulty dehydration in the process of lignin-sludge.And document 3 mentioned above is to carry out, for the mud of generation in sewage treatment plant, the method processed, if but according to the mud that current urban wastewater treatment obtains, sludge moisture content is high, its processing cost of process technique adopting electrochemistry direct oxidation mud also can be high, can improve so that sewage is processed the cost that whole flow process gets off by sewage treatment plant.Therefore, develop one both sewage had been played good treatment effect make it degrade thoroughly, efficiency high；The moisture content of produced mud can be reduced again, do not have the sewage water treatment method of the state of waste residue " mucosa Bao Shui ".More can reduce the cost of sewage treatment plant simultaneously, be only the only way of urban wastewater treatment.
Summary of the invention
The problem that present invention aims to " degraded is difficult thoroughly " and " mud difficulty dehydration " that exist in existing process for town sewage treatment, it is provided that a kind of new and high technology method that urban wastewater treatment renewable resources recycles.The method has overturned the conventional art that conventional treatment town domestic sewage relies on medicament to be master, controlling from source, can be purified by town domestic sewage, reaches drink, water supply standard；The method uses electrochemical treatments technology electrolysis-coagulation technique, replaces high polymer coagulant polyacrylamide, improves dehydration rate, removes mud viscosity, reduces the generation that slag (mud) is measured；The method is not only substantially reduced town domestic sewage treatment operating costs, and Er Qieshui, slag convert reduction renewable resources and all recycle and reuse, and create efficiency of cycling economy.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator adjustment sewage is 7.5-9, makes the SS value of sewage be reduced to below 50mg/L, it is then injected in collecting tank, sewage in collecting tank flows into sewage water inlet pipe, and sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, makes sewage constantly be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Electrolysis bath is provided with electrode, electrode connects positive and negative polarities DC source respectively, voltage between two pole plates is 5～110V, open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 15-60 minute, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treat that water supply network is transported to user, the mud dredge pump precipitated out in sedimentation tank is extracted out, after the sludge press filtration extracted out, it is transported to micro-fertile workshop and manufactures trace element biological humic organic fertilizer, come into the market sale margin, or fortune goes fertilizer plant to make fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, the neutralization regulator described in step (1) is sodium carbonate, sodium hydroxide, lime cream, sulphuric acid or hydrochloric acid.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (1), the method that sewage injects collecting tank is: utilizes height fall to make sewage overflow inject collecting tank, or uses sewage pump to be injected in collecting tank by sewage.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the electrode material of described anodes in electrolytic cells is mild steel, graphite, metal anode containing precious metal platinum, ruthenium, palladium, iridium or rhodium coatings and scribbles TiO2-RuO2One in the titanium-base anode of coating, the electrode material of negative electrode is mild steel.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (3) recycling, after the sludge press filtration of Precipitation, moisture content is reduced to less than 50%.
nullThe method that above-mentioned urban wastewater treatment and resource recycling utilize，In step (2) electrochemical treatments，The structure of electrolysis bath includes: tank、Electrode bar、Sewage water inlet pipe、Inlet distribution device、Aerator or aerator、Air intake duct and air dispersers，Electrode bar is arranged on the inner peripheral wall place along tank，Form the general layout of inside and outside two circles，The electrode bar of outer ring is connected with the negative pole of power supply，The electrode bar of inner ring is connected with the positive pole of power supply，Positive and negative electrode rod each connects，Be not in contact with each other mutually insulated，Air intake duct is connected to aerator or aerator，And it is connected at the air dispersers of bottom of electrolytic tank，It is local that air dispersers can make the air blasted be distributed to each of bottom of electrolysis bath more uniformly，Make aeration more uniformly and comprehensively，In sewage transport flow process，By the inlet distribution device of bottom of electrolytic tank，Add aeration agitation again、Plug-flow，Sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
The method that urban wastewater treatment renewable resources of the present invention recycles, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity, greatly reduces the cost of sewage disposal.
The invention have the benefit that
null1、The method that urban wastewater treatment of the present invention and resource recycling utilize，Flow process is short，Consuming time few，Sewage is through converging in liquid collecting slagging-off sand setting and regulating，After entering present treatment system，Only through one processing unit of electrochemical treatments，Replace conventional art process: preposition (medicament) processes、Biochemical (activated sludge method) anaerobic-aerobic oxygen of holding concurrently processes、Flocculation (dispensing degraded) processes、Two-stage precipitation (one heavy two sinks) processes、The complicated loaded down with trivial details PROCESS FOR TREATMENT flow processs such as residue mud concentration，The wherein light electrolysis of electrochemical treatment process、Electrolysis-coagulation，Then instead of grain slag to separate、The use of the flocculating polymer medicament polyacrylamide of flocculation sediment，And make waste residue (mud) natural sedimentation rapidly of precipitation separation，Viscosity lowers significantly，Sludge dewatering rate is brought up to 50% by 20%，Mud water content is reduced to less than 50% by 80%，Or else it is " sugar heart egg " state，Fabulous resource and the raw materials recovery of becoming utilizes.
2, the method that urban wastewater treatment of the present invention and resource recycling utilize, contaminated water body purification can be reused, containing various polluters in sewage, by Electrode Field effect in electrolysis bath, these materials occur to convert reduction reaction, generate oxidizing species, the polluter raw material running off in sewage, material, adjuvant, auxiliary agent, medicament etc. renewable resources is recycled, controlling from source, by sewage purification, reach water supply standard, saving water resource.
3, the present invention uses electrochemical treatments technology electrolysis-coagulation technique, overturn Physiochemical and biochemical drug treating conventional art, the mode adopting electrolysis instead of the use of the water purification agent of costliness, flocculant and medicine, process system substantially eliminates secondary pollution, improve waste residue dewatering rate, significantly remove viscosity, reduce slag (mud) amount.And the method that urban wastewater treatment renewable resources of the present invention recycles, in step (2) electrochemical treatments, often process 1 ton of sewage consumption≤0.1 degree electric, greatly reduce the cost of sewage disposal.
4, the method that the urban wastewater treatment of the present invention and resource recycling utilize, sewage sludge harmlessness after treatment, all reclaim, then through the ferment-fermented process of biological humic patent, make the biological humic organic composite fertilizer of high value, or it is configured to trace element biological humic organic composite fertilizer, for developing modern agriculture, promote the ecological agriculture, improve soil, repair vegetation, transform salt-soda soil.
5, the urban wastewater treatment of the present invention and resource recycling utilize method process stabilizing, effluent quality are good, mud generation amount greatly reduces, and operating cost is low, and whole-course automation controls, run, safeguard simple and convenient, there is zero-emission, complete utilization, pollution-free, the feature that increases benefit；Can apply to the waste water control of grassroot project, it is possible to device not up to standard is carried out transformation up to standard and perfect.
6, the method that the urban wastewater treatment of the present invention and resource recycling utilize, discharge water outlet after treatment, the primary standard of the urban wastewater treatment firm process discharge of regulation in " integrated wastewater discharge standard " (GB18918-2002) can be better than, reach the index of recycle-water.And adopting the method to process sewage, the pollutant contained in useless (dirt) water and sewage obtain the whole recycle and reuse of renewable resources；Mud then all reclaims and manufactures biological humic compoiste fertilizer, improves the utilization rate of resource, and it is significantly high that it reclaims income, can continuous extra earning efficiency of cycling economy.The method treatment effeciency and automaticity are high, and flow process is concise simple and direct, and energy consumption is very low, and labour cost greatly reduces, and handling will be substantially reduced.
7, sewage is mainly processed by the urban wastewater treatment of the present invention and the method for resource recycling utilization in the way of electrochemical treatments, it is to integrate the multiple electrode process integrated applications such as light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, in sewage disposal process, the strong oxidation of electrochemical treatments, with the strong oxidizer such as elemental oxygen, ozone, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc. strong oxidizer that produce in processing procedure, can effectively kill all pathogenic bacterias, virus and spore, it is ensured that water outlet is used safely；Many pigments being difficult to degrade, through electrochemical treatments, chromophoric group is destroyed, or molecular entergy level changes, thus, changing absorption spectrum, namely color no longer manifests；Each heavy metal species and harmful substance, through electrochemical treatments, it is ensured that is degraded to less than 0.001 or all removes；Electrolysis-coagulation, replaces the use of flocculating polymer medicament polyacrylamide, makes pulp water natural separation precipitate.Adopt the inventive method that sewage is processed, singly do not decrease the expense of flocculating polymer medicament polyacrylamide, more prominent is, decrease the mud generation of 50%, and eliminate the viscosity of mud, do not have the state of waste residue " mucosa Bao Shui ", and easily precipitate out and filter-press dehydration, the moisture content making mud is reduced to less than 50%, the method adopting the present invention processes sewage, not only thoroughly solve " going out shipwreck to use " and " poison mud besieged city " two hang-ups, and economic benefit, social benefit, environmental benefit etc. aspect, suffer from conventional urban sewage treatment process and be difficult the advantage of analogy, take the course of its own.
Accompanying drawing explanation
Fig. 1 is the process chart of the method for urban wastewater treatment of the present invention and resource recycling utilization；
Fig. 2 is the sectional view that in the method electrochemical treatments that urban wastewater treatment of the present invention and resource recycling utilize, electrolysis bath and sedimentation tank connect, in figure, 1, tank, 2, the electrode bar of outer ring, 3, the electrode bar 4 of inner ring, sewage water inlet pipe, 5, inlet distribution device, 6, aerator or aerator, 7, air intake duct, 8, air dispersers, 9, downflow weir, 10, outlet pipe, 11, sedimentation tank；
Fig. 3 is the top view that in the method electrochemical treatments that urban wastewater treatment of the present invention and resource recycling utilize, electrolysis bath and sedimentation tank connect, in figure, 1, tank, 2, the electrode bar of outer ring, 3, the electrode bar 4 of inner ring, sewage water inlet pipe, 5, inlet distribution device, 6, aerator or aerator, 7, air intake duct, 8, air dispersers, 9, downflow weir, 10, outlet pipe, 11, sedimentation tank.
Detailed description of the invention
Embodiment 1
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator sodium carbonate adjustment sewage is 7.5, the SS value making sewage is reduced to below 50mg/L, then, height fall is utilized to make sewage overflow inject collecting tank, collecting tank constantly injects, the sewage of deposit, water completely after the continuous overflow of upper liquid and go out, the sewage overflowed flows into sewage water inlet pipe, sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, sewage is made constantly to be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Being provided with electrode in electrolysis bath, electrode connects positive and negative polarities DC source respectively, and the voltage between two pole plates is 5V, and the electrode material of anodes in electrolytic cells is graphite, and the electrode material of negative electrode is mild steel；Open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 60 minutes, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treat that water supply network is transported to user, the mud high-performance, the etch-proof rustless steel dredge pump of low energy consumption that precipitate out in sedimentation tank are extracted out, after the sludge press filtration extracted out, moisture content is reduced to less than 50%, being then delivered to micro-fertile workshop and manufacture trace element biological humic organic fertilizer, come into the market sale margin.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, in sewage transport flow process, by the inlet distribution device of bottom of electrolytic tank, add aeration agitation again, plug-flow, sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
Embodiment 2
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator lime cream adjustment sewage is 8, the SS value making sewage is reduced to below 50mg/L, then, use high-performance, sewage is injected collecting tank by the etch-proof horizontal rustless steel sewage pump of low energy consumption, collecting tank constantly injects, the sewage of deposit, water completely after the continuous overflow of upper liquid and go out, the sewage overflowed flows into sewage water inlet pipe, sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, sewage is made constantly to be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Being provided with electrode in electrolysis bath, electrode connects positive and negative polarities DC source respectively, and the voltage between two pole plates is 10V, and the electrode material of the anode in electrolysis bath is mild steel or the metal anode containing precious metal ruthenium coating, and the electrode material of negative electrode is mild steel；Open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 40 minutes, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treats that water supply network is transported to user, and the mud high-performance, the etch-proof engineering plastics dredge pump of low energy consumption that precipitate out in sedimentation tank are extracted out, after the sludge press filtration extracted out, moisture content is reduced to less than 50%, then transports to fertilizer plant and makees fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, in sewage transport flow process, by the inlet distribution device of bottom of electrolytic tank, add aeration agitation again, plug-flow, sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
Embodiment 3
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator sodium hydroxide adjustment sewage is 8.5, the SS value making sewage is reduced to below 50mg/L, then, use high-performance, sewage is injected collecting tank by the etch-proof engineering plastics sewage pump of low energy consumption, collecting tank constantly injects, the sewage of deposit, water completely after the continuous overflow of upper liquid and go out, the sewage overflowed flows into sewage water inlet pipe, sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, sewage is made constantly to be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Being provided with electrode in electrolysis bath, electrode connects positive and negative polarities DC source respectively, and the voltage between two pole plates is 45V, and the electrode material of the anode in electrolysis bath is the metal anode containing precious metal platinum coating, and the electrode material of negative electrode is mild steel；Open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 30 minutes, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treat that water supply network is transported to user, the mud high-performance precipitated out in sedimentation tank, the etch-proof rustless steel of low energy consumption or engineering plastics dredge pump are extracted out, after the sludge press filtration extracted out, moisture content is reduced to less than 50%, it is then delivered to micro-fertile workshop and manufactures trace element biological humic organic fertilizer, or fortune go fertilizer plant to make fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, in sewage transport flow process, by the inlet distribution device of bottom of electrolytic tank, add aeration agitation again, plug-flow, sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
Embodiment 4
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator sodium hydroxide adjustment sewage is 9, the SS value making sewage is reduced to below 50mg/L, then, height fall is utilized to make sewage overflow inject collecting tank, collecting tank constantly injects, the sewage of deposit, water completely after the continuous overflow of upper liquid and go out, the sewage overflowed flows into sewage water inlet pipe, sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, sewage is made constantly to be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Being provided with electrode in electrolysis bath, electrode connects positive and negative polarities DC source respectively, and the voltage between two pole plates is 60V, and the electrode material of the anode in electrolysis bath is for scribbling TiO2-RuO2The titanium-base anode of coating, the electrode material of negative electrode is mild steel；Open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 25 minutes, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treat that water supply network is transported to user, the mud high-performance, the etch-proof rustless steel dredge pump of low energy consumption that precipitate out in sedimentation tank are extracted out, after the sludge press filtration extracted out, moisture content is reduced to less than 50%, being then delivered to micro-fertile workshop and manufacture trace element biological humic organic fertilizer, come into the market sale margin.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, in sewage transport flow process, by the inlet distribution device of bottom of electrolytic tank, add aeration agitation again, plug-flow, sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
Embodiment 5
A kind of method that urban wastewater treatment and resource recycling utilize, comprises the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator sulphuric acid or hydrochloric acid adjustment sewage is 7.5-8, the SS value making sewage is reduced to below 50mg/L, then, use high-performance, sewage is injected collecting tank by the etch-proof horizontal rustless steel sewage pump of low energy consumption, collecting tank constantly injects, the sewage of deposit, water completely after the continuous overflow of upper liquid and go out, the sewage overflowed flows into sewage water inlet pipe, sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, sewage is made constantly to be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, and electrolysis bath is connected to aerator or aerator, and in transport flow, sewage natural produces impulse force, then adds aeration agitation, plug-flow, just constantly seethes continuous flowing in a cell；Electrolysis bath is provided with electrode, electrode connects positive and negative polarities DC source respectively, voltage between two pole plates is 110V, the electrode material of the anode in electrolysis bath contains precious metal platinum, ruthenium, palladium, the metal anode of iridium or rhodium coatings, the electrode material of negative electrode is mild steel, open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 15 minutes, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected in sedimentation tank through outlet pipe by downflow weir and staticly settle；By Electrode Field effect in electrolysis bath, the electrode reaction integrated applications such as collection light electrolysis, electrolysis-coagulation, catalytic oxidation, absorption, and what the chemical substance generation chemical reaction of sewage Central Plains existence constantly produced strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., pollutant are carried out that molecule is broken, chain rupture open loop, thaumatropy, pressure degraded, advanced treating, water and slag are rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag；
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treat that water supply network is transported to user, the mud high-performance precipitated out in sedimentation tank, the etch-proof rustless steel of low energy consumption or engineering plastics dredge pump are extracted out, after the sludge press filtration extracted out, moisture content is reduced to less than 50%, it is then delivered to micro-fertile workshop and manufactures trace element biological humic organic fertilizer, come into the market sale margin, or fortune go fertilizer plant to make fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, often processes 1 ton of sewage consumption≤0.1 degree electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilize, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, in sewage transport flow process, by the inlet distribution device of bottom of electrolytic tank, add aeration agitation again, plug-flow, sewage is made not stop in a cell to seethe continuous flowing；Edge in electrolysis bath upper end is provided with downflow weir, is connected to outlet pipe in downflow weir, and outlet pipe is connected in sedimentation tank.
Wastewater treatment efficiency
The method adopting the present invention carries out process the discharge water outlet that obtains of sewage detect, testing result is: the water quality discharging water outlet after treatment is better than the primary standard that the urban wastewater treatment firm process of regulation in " integrated wastewater discharge standard " (GB18918-2002) is discharged, reach the index of recycle-water, shown in table specific as follows:
Above-mentioned visible, adopt the method that urban wastewater treatment of the present invention and resource recycling utilize that sewage is processed, the water quality of the water outlet obtained is better than in " integrated wastewater discharge standard " (GB18918-2002) discharge standard specified, reaches the index of recycle-water.
Claims (6)
1. the method that a urban wastewater treatment and resource recycling utilize, it is characterised in that comprise the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by scattered municipal sewage, after converging liquid collecting, sewage is carried out sand setting slagging-off process, and the pH with neutralization regulator adjustment sewage is 7.5-9, makes the SS value of sewage be reduced to below 50mg/L, it is then injected in collecting tank, sewage in collecting tank flows into sewage water inlet pipe, and sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, makes sewage constantly be injected into the bottom of electrolysis bath from top to down and by each place of inlet distribution device stream to bottom of electrolytic tank；
(2) electrochemical treatments, pretreated sewage enters electrolysis bath, electrolysis bath is connected to aerator or aerator, electrolysis bath is provided with electrode, electrode connects positive and negative polarities DC source respectively, voltage between two pole plates is 5～110V, open DC source and sewage is carried out continuous electrochemical process, sewage mean residence time in a cell is 15-60 minute, sewage is constantly entered in electrolysis bath by sewage water inlet pipe, through the supernatant of electrochemical treatments in electrolysis bath, then successively overflow and go out to be injected through outlet pipe by downflow weir sedimentation tank staticly settle,
(3) precipitation process and recycling: the sewage after electrochemical treatments flows into sedimentation tank, in sedimentation tank, water and residue are rapidly separated precipitation, Water warfare is clarified, sedimentation tank clean liquid at the middle and upper levels is also by the mode of overflow, successive injected clear water reservoir, treats that water supply network is transported to user, and the mud dredge pump precipitated out in sedimentation tank is extracted out, after the sludge press filtration extracted out, it is transported to micro-fertile workshop or fertilizer plant makees fertilizer.
2. the method that urban wastewater treatment according to claim 1 and resource recycling utilize, it is characterised in that the neutralization regulator described in step (1) is sodium carbonate, sodium hydroxide, lime cream, sulphuric acid or hydrochloric acid.
3. the method that urban wastewater treatment according to claim 1 and resource recycling utilize, it is characterized in that, in step (1), the mode that sewage injects collecting tank is: utilizes height fall to make sewage overflow inject collecting tank, or uses sewage pump to be injected in collecting tank by sewage.
4. the method that urban wastewater treatment according to claim 1 and resource recycling utilize, it is characterized in that, in step (2) electrochemical treatments, the electrode material of described anodes in electrolytic cells is mild steel, graphite, metal anode containing precious metal platinum, ruthenium, palladium, iridium or rhodium coatings and scribbles TiO2-RuO2One in the titanium-base anode of coating, the electrode material of negative electrode is mild steel.
5. the method that urban wastewater treatment according to claim 1 and resource recycling utilize, it is characterised in that in step (3) recycling, after the sludge press filtration of Precipitation, moisture content is reduced to less than 50%.
6. the method that urban wastewater treatment according to claim 1 and resource recycling utilize, it is characterized in that, in step (2) electrochemical treatments, the structure of electrolysis bath includes: tank, electrode bar, sewage water inlet pipe, inlet distribution device, aerator or aerator, air intake duct and air dispersers, electrode bar is arranged on the inner peripheral wall place along tank, form the general layout of inside and outside two circles, the electrode bar of outer ring is connected with the negative pole of power supply, the electrode bar of inner ring is connected with the positive pole of power supply, positive and negative electrode rod each connects, be not in contact with each other mutually insulated, air intake duct is connected to aerator or aerator, and it is connected at the air dispersers of bottom of electrolytic tank, edge in electrolysis bath upper end is provided with downflow weir, downflow weir is connected to outlet pipe, outlet pipe is connected in sedimentation tank.
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