CN105776684B - A kind of method that urban wastewater treatment and resource recycling utilize - Google Patents

A kind of method that urban wastewater treatment and resource recycling utilize Download PDF

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CN105776684B
CN105776684B CN201610320765.2A CN201610320765A CN105776684B CN 105776684 B CN105776684 B CN 105776684B CN 201610320765 A CN201610320765 A CN 201610320765A CN 105776684 B CN105776684 B CN 105776684B
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sewage
electrolytic cell
water
sludge
electrode
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CN105776684A (en
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黄名钟
程洁
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Guangxi Peifeng Technology Co.,Ltd.
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黄名钟
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The present invention relates to a kind of methods that urban wastewater treatment and resource recycling utilize, it mainly include sewage disinfection treatment, electrochemical treatments and precipitation process and three steps of resource utilization, this method can be by contaminated water body purification repeated recycling utilize, by the waste residue (sludge) of Precipitation, conversion, reduction renewable resources recycle, manufacture microelement biological humic organic fertilizer, sale margin.Electrochemical treatments are carried out to sewage using this method, it does not need using flocculating polymer medicament polyacrylamide, main consumption electric energy, every 1 ton of sewage of processing consumes≤0.1 degree of electricity, reduce 30% or more sewage treatment expense, it is more outstanding to be, the sludge for reducing > 50% generates, and the viscosity of sludge is eliminated significantly, be not in the state of waste residue " mucous membrane Bao Shui ", and be easy precipitation and filter-press dehydration, the moisture content of sludge is made to be reduced to 50% or less, solve " shipwreck use out " and " malicious mud besieged city " two hang-ups, also creation efficiency of cycling economy.

Description

A kind of method that urban wastewater treatment and resource recycling utilize
Technical field
The present invention relates to technical field of sewage, and in particular to what a kind of urban wastewater treatment and resource recycling utilized Method.
Background technique
China is the country of shortage of water resources, and currently, increasingly serious water environment pollution and shortage of water resources problem are serious Constrain the development of China's economic society.Municipal sewage is subjected to purified treatment, makes up to the purpose of recycling, can be saved big The water resource of amount.Urban wastewater treatment firm carries the processing heavy burden of most sewage (mainly sanitary sewage) in city, And in water pollutant degradation subtractive process, and will necessarily constantly generate large number of waste residue mud, it is necessary to it is pocessed.City Town sewage treatment plant sewage source, the mostly life of organ, unit, school, hospital, army, restaurant, resident etc. are dirty Water is also discharged to sewage treatment plant furthermore, it is also possible to there is individual enterprises of factory to handle the industrial wastewater of (COD about 400mg/L) still not up to standard After reprocessing (or dilution), discharge together.Therefore, into the sewage of sewage plant processing, composition is more complicated, both containing organic Substance, inorganic substances also contain heavy metal, chemical substance, also have germ virus gemma harmful substance etc..It deals with, Single certain technology or certain Water purification medicament are taken, is all difficult processing thoroughly, realizes the up to standard of real meaning.
For urban wastewater treatment method there are many kinds of, can generally be divided into following three categories: physical method, chemical method And bioanalysis.Physical method is usually to handle sewage with modes such as filtering, precipitating, air bearings, and filtering, the precipitation method have disengaging time Short, the advantages that device is simple, treating capacity is big, but it is higher to processing equipment performance requirement, and investment cost and operating cost are also higher, The operating conditions such as the treatment effeciency of gas floatation process and feed entrance point, air inflow, liquid level, gas floatation agent dosage are closely related, operation Complex management, and muddy waste water can only be handled, it cannot handle containing toxic chemical substance and highly concentrated waste water;Chemical method Generally by the specific chemical reagent of addition, such as flocculant, complexing agent or soda acid inorganic agent, at element toxic in water Reason, has that capital expenditure is few, simple process, operation is easy, low energy consumption, adaptable to the variation of temperature, but disadvantage is also ratio It is more single, it is at high cost, the organic wastewater of the high concentration of content complexity cannot be handled, especially to waste water small molecular organic matter Removal rate is lower, generally requires to be used in combination with other processing methods, and waste water could qualified discharge;Bioanalysis be it is most mature, can One for the treatment of process leaned on, in bioremediation, and it is most widely used with activated sludge process, effect is preferable.Using active dirty Mud method process sanitary sewage has effluent quality preferable, and system running and comparing is stable, and treatment effeciency is higher equal obvious excellent Point, but also there is certain limitation simultaneously: the volume for handling structures is larger, and investment cost is very high, and system is to impact The adaptability of load (pollutant burden of sewage amplifies or becomes smaller at double suddenly) is poor, generate a large amount of excess sludge need into Row processing etc., more have one it is outstanding it is worth improve the serious phenomenon paid attention to, during being exactly Biochemical method town sewage, The indexs such as nitrogen, phosphorus are usually easy exceeded to be difficult to solve.
Treatment of town sewage and sludge is handled at present, is generallyd use mechanical every slag, biochemical degradation, medicament purification, materialization flocculation, filters pressing The conventional process techniques such as dehydration, can effectively degrade the indexs such as COD, SS, but undesirable, generally existing following situations: 1, of degrading Degradation is difficult thoroughly: general pollutant can remove, and to those transparent chain cyclic macromolecular compounds for being dissolved in water, then it is incompetent For power, target water, which is not achieved, in effluent quality to recycle, and have to discharge, significantly waste water resource.2, sludge difficulty is dehydrated: Sewage treatment will necessarily generate a large amount of sludge, it can be described as " resource mislayed ", current nearly all field sewage It handles (including industrial wastewater), when carrying out water, slag separation, all uses high polymer coagulant polyacrylamide bar none, it Have the advantages that use is simple, effective and rapid, still, its separation process is the pollution encased in water with its macromolecule mucous membrane Object molecule is adhesively-bonded together to form colloidal state group and is separated from water especially such as the capsule and pill of Bao Shui, precipitates into sludge precipitation rapidly.Just by In its " mucous membrane Bao Shui " the difficult fatal negative interaction for crushing sad filter, cause sludge dewatering efficiency very poor, filter residue-sludge contains Water rate is up to 70-80%, causes extreme difficulties to deep processing resource utilization, the too high processing of having no idea of moisture uses.It banks up Dry, surface layer seems to have done the inside also like sugared heart egg, cannot use at all, and foul smell disturbs residents and causes to pollute again.Heating is dried It goes ahead, consumption mass energy is more uneconomical.So sludge dewatering problem is simply at insurmountable barrier.
As described above, at present the various processing methods of urban wastewater treatment not can solve " degradation thorough " and The problem of " Treatment of Sludge ", so many chemistry, biology and environmental science worker are in continuous comprehensive study in recent years Sewage water treatment method, 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 treatment, patent right People: Mengzi Mining and Metallurgy Co., Ltd., address: Yunnan Province Hani-Yi Autonomous Prefecture of Honghe Mengzi city day road 66 is plucked : a kind of method of sewage treatment belongs to environmentally friendly metallurgical technology field.The preprocessing process of sewage: first by waste acid and sewage It neutralizes, send comprehensive slag library after physics settles by supernatant siphon the treatment fluid after neutralization, then through in coagulating sedimentation, reduction It is sent to concentrator precipitating after clear liquid hardness and obtains filter-press residues and pressing filtering liquid through filter press filters pressing, filter-press residues return to comprehensive slag library; The advanced treating of sewage: by obtained pressing filtering liquid through electrolytic oxidation, electroreduction, electrolytic flocculation and electrofloatation electrochemistry work Electrochemical treatments liquid is obtained after skill processing;Electrochemical treatments liquid removes suspended matter in water removal through air bearing, again through filtration with manganese sand, activity Filtrate is obtained after charcoal absorption;Filtrate is handled to obtain qualified discharge water quality through membranous system, and wherein membranous system includes nanofiltration, height Press it is reverse osmosis, three groups of low pressure reverse osmosis.This method concentrator waste residue amount reduces, and cleaning cycle extends, and cost is reduced, and extends simultaneously Sedimentation time for the treatment of fluid, water turbidity reduce.
2, Chinese patent, application number: 201410069088.2, a kind of denomination of invention: electrochemistry synchronous denitrification dephosphorizing device And method for the treatment of city waste water, patentee: Ecological Environment Research Center, Chinese Academy of Sciences, address: Haidian District, Beijing City is double clear Road 18, abstract: a kind of electrochemistry synchronous denitrification dephosphorizing device and method for the treatment of city waste water belong to sewage disposal technology neck Domain.By the steady electrode of shape, iron electrode commonly used by electrochemical water treatment technology, aluminium electrode, magnesium electrode and copper modification stainless steel electricity Pole combination can carry out the denitrogenation dephosphorizing processing of municipal sewage in same electrolytic cell, and apparatus structure is simple, easy to operate, efficiency Height, good in nitrate nitrogen removal effect is, it can be achieved that scale, automated sewage processing.The invention method for the treatment of city waste water simple process, behaviour Facilitate, save human and material resources, low energy consumption, and sewage pollution index removal rate is high, municipal sewage index COD, nitric acid Salt nitrogen, ammonia nitrogen, total phosphorus removal rate respectively reach 92% or more.
3, Chinese patent, application number: 201210232453.8, a kind of denomination of invention: place of electrochemistry direct oxidation sludge Science and engineering skill, patentee: Changzhou Expansion New Stuff Technology Co., Ltd., address: Jiangsu Province Xinbei district the Changjiang river Road 25 Numbers three brilliant industry parks the 1st buildings, abstract: it is direct to use two-stage electrochemistry for a kind for the treatment of process of electrochemistry direct oxidation sludge Oxidation technology carries out oxygenolysis processing to the sludge of moisture content 99.6%, and excess sludge reduction is made to reach 95% or more, can be wide It is general to be used for city domestic sewage treatment plant, urban comprehensive wastewater treatment plant, the Treatment of Sludge of city chemical industry sewage treatment plant and place It sets, provides clean, low energy consumption solution for the safe handling disposition of sludge.
It is above-mentioned retrieve processing sewage or handle sludge method, all be have targetedly to sewage carry out processing or Person is to handle again the sludge (filter residue) generated after sewage treatment, such as above-mentioned document 1 and document 2, although to sewage After reason, sewage pollution index removal rate is high, but does not mention in the technical process of the two methods to sewage disposal process The filter residue (sludge) of middle generation how to handle the problem of, therefore still can generate a large amount of excess sludge and be handled, And can also there are problems that the dehydration of sludge difficulty during handling sludge.And document 3 mentioned above is for sewage treatment plant The method that the sludge of middle generation is handled, but if according to the sludge that current urban wastewater treatment obtains, sludge is aqueous Amount is high, and using the treatment process of electrochemistry direct oxidation sludge, its processing cost also can be high, so that sewage treatment plant is to dirt Water, which carries out the cost that processing whole flow process is got off, to be improved.Therefore, it develops and a kind of good treatment effect both was played to sewage Keep its degradation thorough, high-efficient;The moisture content of sludge can reduce again caused by, is not in the shape of waste residue " mucous membrane Bao Shui " The sewage water treatment method of state.The cost that sewage treatment plant can more be reduced simultaneously, is only the only way of urban wastewater treatment.
Summary of the invention
It is an object of the invention to for " degradation is difficult thoroughly " present in existing process for town sewage treatment and " sludge hardly possible The problem of dehydration ", provide a kind of new and high technology method that urban wastewater treatment renewable resources recycle.This method is overturned Conventional treatment town domestic sewage relies on the traditional technology based on medicament that can purify town domestic sewage from being controlled source, reach To drink, water supply standard;This method uses electrochemical treatments technology electrolysis-coagulation technique, replaces high polymer coagulant polyacrylamide Amine improves dehydration rate, removal sludge viscosity, reduces the generation of slag (sludge) amount;This method not only substantially reduces urban life dirt Water process operating cost, Er Qieshui, slag conversion reduction renewable resources all recycle and reuse, and create efficiency of cycling economy.
To achieve the above object, the present invention adopts the following technical scheme:
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and be 7.5-9 with neutralizing regulator to adjust the pH of sewage, so that the SS value of sewage is reduced to 50mg/L hereinafter, being then injected into In collecting tank, the 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 is constantly injected into the bottom of electrolytic cell from top to down and flows to each place of bottom of electrolytic tank by inlet distribution device;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 5~110V, opens DC power supply carries out continuous electrochemical processing to sewage, and the mean residence time of sewage in a cell is 15-60 minutes, sewage It is constantly entered in electrolytic cell by sewage water inlet pipe, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then successively Overflow and go out by overflow weir through outlet pipe inject sedimentation basin in staticly settle;It is acted on, is collected micro- by Electrode Field in electrolytic cell Chemical substance existing for the integrated application of the electrode reactions such as electrolysis, electrolysis-coagulation, catalysis oxidation, absorption and sewage Central Plains occurs Chemically react strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and the Gao Meng constantly generated Hydrochlorate etc., chain rupture open loop, thaumatropy, forced degradation, advanced treating broken to pollutant progress molecule, water and slag divide rapidly From water purifies rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, and the sludge being precipitated in sedimentation basin is extracted out with dredge pump, after the sludge press filtration of extraction, It is transported to micro- fertile workshop manufacture microelement biological humic organic fertilizer, is got a profit into market sale, or fortune goes fertilizer plant to do Fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, neutralization regulator as described in step (1) are Sodium carbonate, sodium hydroxide, milk of lime, sulfuric acid or hydrochloric acid.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (1), by sewage injection collecting tank Method are as follows: make sewage overflow inject collecting tank using height fall, or injected sewage in collecting tank using sewage pump.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, the electrolysis The electrode material of slot Anodic be mild steel, graphite, the metal anode containing precious metal platinum, ruthenium, palladium, iridium or rhodium coatings and It is coated with TiO2-RuO2 One of titanium-base anode of coating, the electrode material of cathode are mild steel.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (3) resource utilization, Precipitation Sludge press filtration after moisture content be reduced to 50% or less.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure includes: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and air Dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and power supply of outer ring Cathode be connected, the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and be not in contact with each other mutually insulated, Air intake duct is connected to air blower or aerator, and is connected at the air dispersers of bottom of electrolytic tank, air dispersers energy The each place for the bottom for being distributed to electrolytic cell for keeping the air blasted more uniform, so that aeration is more uniform and comprehensive, In sewage transport process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage is in electrolytic cell In do not stop to seethe continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe, outlet pipe in overflow weir It is connected in sedimentation basin.
The method that urban wastewater treatment renewable resources of the present invention recycle, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity, greatly reduces the cost of sewage treatment.
The invention has the benefit that
1, the method that urban wastewater treatment and resource recycling of the present invention utilize, process is short, and time-consuming is few, and sewage collects through convergence It in liquid slagging-off sand setting and adjusts, into after present treatment system, only passes through one processing unit of electrochemical treatments, replace traditional technology Technique: preposition (medicament) processing, biochemical (activated sludge method) anaerobic-aerobic and oxygen processing, flocculation (dispensing degradation) processing, two Grade precipitates the cumbersome process processes of complexity such as (one heavy two is heavy) processing, remaining mud concentration, wherein electrochemical treatments Light electrolysis, the electrolysis-coagulation of process then makes instead of the flocculating polymer medicament polyacrylamide of grain slag separation, flocculation sedimentation With, and making waste residue (mud) rapid natural sedimentation of precipitation and separation, viscosity lowers significantly, and sludge dewatering rate is improved by 20% To 50%, mud water content is reduced to 50% hereinafter, be or else " sugared heart egg " state by 80%, fabulous to become resource and raw materials recovery It utilizes.
2, contaminated water body purification can be repeated benefit by the method that urban wastewater treatment and resource recycling of the present invention utilize With, various pollutants matter is contained in sewage, is acted on by Electrode Field in electrolytic cell, conversion reduction reaction occurs for these substances, Oxidizing species are generated, are provided again so that being lost the polluter ﹣ raw material in sewage, material, auxiliary material, auxiliary agent, medicament etc. Sourceization recycles, and from being controlled source, by sewage purification, reaches water supply standard, saves water resource.
3, the present invention uses electrochemical treatments technology electrolysis-coagulation technique, has overturned Physiochemical and biochemical drug-treated tradition skill Art, instead of the use of expensive water purification agent, flocculant and drug by the way of electrolysis, processing system substantially eliminates secondary dirt Dye improves waste residue dewatering rate, significantly removal viscosity, reduces slag (sludge) amount.And urban wastewater treatment of the present invention provides again The method that source recycles, in step (2) electrochemical treatments, every 1 ton of sewage of processing consume≤0.1 degree it is electric, greatly reduce The cost of sewage treatment.
4, the method that urban wastewater treatment of the invention and resource recycling utilize, sewage sludge harmlessness, whole after processing Recycling, then through the ferment-fermented processing of biological humic patent, the biological humic organic composite fertilizer of high value is made, or match Microelement biological humic organic composite fertilizer is made, for developing modern agriculture, promotes the ecological agriculture, improves soil, repair Multiple vegetation, is transformed salt-soda soil.
5, the method and process that urban wastewater treatment of the invention and resource recycling utilize is stable, effluent quality is good, sludge Yield greatly reduces, and operating cost is low, full automatic control, runs, safeguards simple and convenient, has zero-emission, complete Using, it is pollution-free, increase benefit the characteristics of;It can be applied to the waste water control of grassroot project, device not up to standard can also be carried out It is up to standard transformation and it is perfect.
6, the method that urban wastewater treatment of the invention and resource recycling utilize, discharge water outlet after treatment, can The primary standard discharged is handled better than urban wastewater treatment firm specified in " integrated wastewater discharge standard " (GB18918-2002), Reach the index of recycle-water.And sewage is handled using this method, the pollutant contained in useless (dirt) water and sewage is provided again Sourceization all recycles;Then all recycling manufactures biological humic organic compound fertilizer to sludge, improves the utilization of resource Rate, recycling income is very high, can continuous extra earning efficiency of cycling economy.This method treatment effeciency and high degree of automation, Er Qieliu Cheng Jinglian is simple and direct, and energy consumption is very low, and labour cost greatly reduces, and processing cost will substantially reduce.
7, urban wastewater treatment of the invention and resource recycling by method mainly in the way of electrochemical treatments Sewage is handled, it is that integrate a variety of electrode processes such as light electrolysis, electrolysis-coagulation, catalysis oxidation, absorption comprehensive Close application, in sewage disposal process, the strong oxidizer generated in the strong oxidation and treatment process of electrochemical treatments such as: Elemental oxygen, ozone, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc. strong oxidizer, can effectively kill all germs, Virus and gemma, it is ensured that water outlet safe handling;Many is difficult to the pigment degraded, and through electrochemical treatments, chromophoric group is destroyed, Or molecular entergy level changes, thus, absorption spectrum is changed, color no longer shows;Each heavy metal species and harmful substance, Through electrochemical treatments, it is ensured that be degraded to 0.001 or less or be totally removed;Electrolysis-coagulation replaces flocculating polymer medicament poly- third The use of acrylamide precipitates pulp water natural separation.Sewage is handled using the method for the present invention, does not reduce macromolecule singly The expense of flocculation medicament polyacrylamide, it is more outstanding to be, reduce 50% sludge generation, and eliminate the viscosity of sludge, no Will appear the state of waste residue " mucous membrane Bao Shui ", and be easy to be precipitated and filter-press dehydration, make the moisture content of sludge be reduced to 50% with Under, sewage is handled using method of the invention, not only thoroughly solves " shipwreck use out " and " malicious mud besieged city " two hang-ups, but also Economic benefit, social benefit, environmental benefit etc. etc. suffer from the advantage that conventional urban sewage treatment process is difficult analogy, It takes the course of its own.
Detailed description of the invention
Fig. 1 is the process flow chart for the method that urban wastewater treatment of the present invention and resource recycling utilize;
Electrolytic cell and precipitating in the method electrochemical treatments that Fig. 2 utilizes for urban wastewater treatment of the present invention and resource recycling The sectional view of pond connection, in figure, 1, sink, 2, the electrode bar of outer ring, 3, electrode bar 4, the sewage water inlet pipe of inner ring, 5, water inlet point Cloth device, 6, air blower or aerator, 7, air intake duct, 8, air dispersers, 9, overflow weir, 10, outlet pipe, 11, sedimentation basin;
Electrolytic cell and precipitating in the method electrochemical treatments that Fig. 3 utilizes for urban wastewater treatment of the present invention and resource recycling The top view of pond connection, in figure, 1, sink, 2, the electrode bar of outer ring, 3, electrode bar 4, the sewage water inlet pipe of inner ring, 5, water inlet point Cloth device, 6, air blower or aerator, 7, air intake duct, 8, air dispersers, 9, overflow weir, 10, outlet pipe, 11, sedimentation basin.
Specific embodiment
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and be 7.5 with neutralizing regulator sodium carbonate to adjust the pH of sewage, makes the SS value of sewage be reduced to 50mg/L hereinafter, then, Sewage overflow is set to inject collecting tank using height fall, the sewage for constantly injecting, laying in collecting tank, upper liquid is continuous after water is full Overflow and go out, the sewage that overflows flows into sewage water inlet pipe, and sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, makes Sewage is constantly injected into the bottom of electrolytic cell from top to down and flows to each place of bottom of electrolytic tank by inlet distribution device;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 5V, in electrolytic cell The electrode material of anode is graphite, and the electrode material of cathode is mild steel;It opens DC power supply and continuous electrochemical is carried out to sewage Processing, the mean residence time of sewage in a cell are 60 minutes, and sewage constantly enters electrolytic cell by sewage water inlet pipe In, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then successive overflow and go out injected by overflow weir through outlet pipe It is staticly settled in sedimentation basin;It is acted on by Electrode Field in electrolytic cell, the electricity such as collection light electrolysis, electrolysis-coagulation, catalysis oxidation, absorption It is such as former that the strong oxidizer that chemical reaction constantly generates occurs for chemical substance existing for pole reaction integrated application and sewage Central Plains Sub- oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganate etc., chain rupture broken to pollutant progress molecule Open loop, thaumatropy, forced degradation, advanced treating, water and slag are rapidly separated, and water purifies rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, and the sludge high-performance that is precipitated in sedimentation basin, the etch-proof stainless steel of low energy consumption are inhaled Dredge pump is extracted out, and moisture content is reduced to 50% hereinafter, being then delivered to micro- fertile workshop manufacture microelement life after the sludge press filtration of extraction Object humic acid organic fertilizer material is got a profit into market sale.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure include: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and sky Gas dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and electricity of outer ring The cathode in source is connected, and the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and is not in contact with each other mutually absolutely Edge, air intake duct are connected to air blower or aerator, and are connected at the air dispersers of bottom of electrolytic tank, in sewage transport In process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage does not stop to turn in a cell Rise continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe in overflow weir, outlet pipe is connected to heavy In the pond of shallow lake.
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and be 8 with neutralizing regulator milk of lime to adjust the pH of sewage, so that the SS value of sewage is reduced to 50mg/L hereinafter, then, making Sewage is injected into collecting tank with high-performance, low energy consumption etch-proof horizontal stainless steel sewage pump, constantly injects, lay in collecting tank Sewage, the continuous overflow of upper liquid after water is full and go out, the sewage overflowed flows into sewage water inlet pipe, and sewage water inlet pipe connection is electric The inlet distribution device for solving trench bottom, makes sewage constantly be injected into the bottom of electrolytic cell from top to down and flow to by inlet distribution device Each place of bottom of electrolytic tank;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 10V, in electrolytic cell Anode electrode material be mild steel or the metal anode containing precious metal ruthenium coating, the electrode material of cathode is low-carbon Steel;It opens DC power supply and continuous electrochemical processing is carried out to sewage, the mean residence time of sewage in a cell is 40 minutes, Sewage is constantly entered in electrolytic cell by sewage water inlet pipe, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then continuously Continuous overflow and go out to inject in sedimentation basin by overflow weir through outlet pipe and staticly settle;It is acted on by Electrode Field in electrolytic cell, Collect chemical substance existing for the electrode reactions integrated applications such as light electrolysis, electrolysis-coagulation, catalysis oxidation, absorption and sewage Central Plains Occur the strong oxidizer that constantly generates of chemical reaction for example elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and Permanganate etc., chain rupture open loop, thaumatropy, forced degradation, advanced treating broken to pollutant progress molecule, water and slag are fast Speed separation, water purify rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, the sludge high-performance that is precipitated in sedimentation basin, the etch-proof engineering plastics of low energy consumption Dredge pump is extracted out, and moisture content is reduced to 50% and makees fertilizer hereinafter, then transporting to fertilizer plant after the sludge press filtration of extraction.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure include: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and sky Gas dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and electricity of outer ring The cathode in source is connected, and the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and is not in contact with each other mutually absolutely Edge, air intake duct are connected to air blower or aerator, and are connected at the air dispersers of bottom of electrolytic tank, in sewage transport In process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage does not stop to turn in a cell Rise continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe in overflow weir, outlet pipe is connected to heavy In the pond of shallow lake.
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and be 8.5 with neutralizing regulator sodium hydroxide to adjust the pH of sewage, so that the SS value of sewage is reduced to 50mg/L hereinafter, so Afterwards, sewage is injected into collecting tank using high-performance, low energy consumption etch-proof engineering plastics sewage pump, constantly injected in collecting tank, The sewage of deposit, water are expired the rear continuous overflow of upper liquid and are gone out, and the sewage overflowed flows into sewage water inlet pipe, and sewage water inlet pipe connects The inlet distribution device for connecing bottom of electrolytic tank makes sewage constantly be injected into the bottom of electrolytic cell from top to down and by inlet distribution device Flow to each place of bottom of electrolytic tank;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 45V, in electrolytic cell Anode electrode material be the metal anode containing precious metal platinum coating, the electrode material of cathode is mild steel;It opens DC power supply carries out continuous electrochemical processing to sewage, and the mean residence time of sewage in a cell is 30 minutes, and sewage is logical It crosses sewage water inlet pipe constantly to enter in electrolytic cell, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then successively overflows It flows and goes out through overflow weir through being staticly settled in outlet pipe injection sedimentation basin;It is acted on by Electrode Field in electrolytic cell, collects micro- electricity Chemical substance existing for the integrated application of the electrode reactions such as solution, electrolysis-coagulation, catalysis oxidation, absorption and sewage Central Plains Learn strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganic acid that reaction constantly generates Salt etc., chain rupture open loop, thaumatropy, forced degradation, advanced treating broken to pollutant progress molecule, water and slag are rapidly separated, Water purifies rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, the sludge high-performance that is precipitated in sedimentation basin, the etch-proof stainless steel of low energy consumption or Engineering plastics dredge pump is extracted out, and moisture content is reduced to 50% hereinafter, being then delivered to micro- fertile workshop manufacture after the sludge press filtration of extraction Microelement biological humic organic fertilizer, or fortune go fertilizer plant to make fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure include: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and sky Gas dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and electricity of outer ring The cathode in source is connected, and the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and is not in contact with each other mutually absolutely Edge, air intake duct are connected to air blower or aerator, and are connected at the air dispersers of bottom of electrolytic tank, in sewage transport In process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage does not stop to turn in a cell Rise continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe in overflow weir, outlet pipe is connected to heavy In the pond of shallow lake.
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and be 9 with neutralizing regulator sodium hydroxide to adjust the pH of sewage, makes the SS value of sewage be reduced to 50mg/L hereinafter, then, Sewage overflow is set to inject collecting tank using height fall, the sewage for constantly injecting, laying in collecting tank, upper liquid is continuous after water is full Overflow and go out, the sewage that overflows flows into sewage water inlet pipe, and sewage water inlet pipe connects the inlet distribution device of bottom of electrolytic tank, makes Sewage is constantly injected into the bottom of electrolytic cell from top to down and flows to each place of bottom of electrolytic tank by inlet distribution device;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 60V, in electrolytic cell Anode electrode material be coated with TiO2-RuO2 The titanium-base anode of coating, the electrode material of cathode are mild steel;It opens DC power supply carries out continuous electrochemical processing to sewage, and the mean residence time of sewage in a cell is 25 minutes, and sewage is logical It crosses sewage water inlet pipe constantly to enter in electrolytic cell, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then successively overflows It flows and goes out through overflow weir through being staticly settled in outlet pipe injection sedimentation basin;It is acted on by Electrode Field in electrolytic cell, collects micro- electricity Chemical substance existing for the integrated application of the electrode reactions such as solution, electrolysis-coagulation, catalysis oxidation, absorption and sewage Central Plains Learn strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, hydrogen peroxide and permanganic acid that reaction constantly generates Salt etc., chain rupture open loop, thaumatropy, forced degradation, advanced treating broken to pollutant progress molecule, water and slag are rapidly separated, Water purifies rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, and the sludge high-performance that is precipitated in sedimentation basin, the etch-proof stainless steel of low energy consumption are inhaled Dredge pump is extracted out, and moisture content is reduced to 50% hereinafter, being then delivered to micro- fertile workshop manufacture microelement life after the sludge press filtration of extraction Object humic acid organic fertilizer material is got a profit into market sale.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure include: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and sky Gas dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and electricity of outer ring The cathode in source is connected, and the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and is not in contact with each other mutually absolutely Edge, air intake duct are connected to air blower or aerator, and are connected at the air dispersers of bottom of electrolytic tank, in sewage transport In process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage does not stop to turn in a cell Rise continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe in overflow weir, outlet pipe is connected to heavy In the pond of shallow lake.
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 the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting slagging-off to sewage Processing, and with neutralize regulator sulfuric acid or hydrochloric acid adjusting sewage pH be 7.5-8, make the SS value of sewage be reduced to 50mg/L with Under, then, sewage is injected into collecting tank using high-performance, low energy consumption etch-proof horizontal stainless steel sewage pump, in collecting tank not Disconnected injection, deposit sewage, the continuous overflow of upper liquid after water is full and go out, the sewage inflow sewage water inlet pipe overflowed, sewage Water inlet pipe connect bottom of electrolytic tank inlet distribution device, make sewage be constantly injected into from top to down electrolytic cell bottom and by into Water distributor flows to each place of bottom of electrolytic tank;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, In transport flow, sewage natural generate impulse force, then plus aeration stirring, plug-flow, just constantly seethe continuous flowing in a cell;Electricity Electrode is installed in solution slot, electrode connects positive and negative polarities DC power supply respectively, and the voltage between two pole plates is 110V, in electrolytic cell The electrode material of anode contain the metal anodes of precious metal platinum, ruthenium, palladium, iridium or rhodium coatings, the electrode material of cathode be for Mild steel opens DC power supply and carries out continuous electrochemical processing to sewage, and the mean residence time of sewage in a cell is 15 Minute, sewage is constantly entered in electrolytic cell by sewage water inlet pipe, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then Successive overflow and go out to inject in sedimentation basin by overflow weir through outlet pipe and staticly settle;Made by Electrode Field in electrolytic cell With chemicals existing for the electrode reactions integrated application such as collection light electrolysis, electrolysis-coagulation, catalysis oxidation, absorption and sewage Central Plains Strong oxidizer such as elemental oxygen, ozone, dissolved oxygen, chlorine, chlorine dioxide, the hydrogen peroxide that chemical reaction constantly generates occur for matter With permanganate etc., carry out that molecule is broken, chain rupture open loop, thaumatropy, forced degradation, advanced treating to pollutant, water and slag It is rapidly separated, water purifies rapidly clarification, the rapid Precipitation of slag;
(3) precipitation process and resource utilization: sewage after electrochemical treatments flows into sedimentation basin, the water and residual in sedimentation basin Slag is rapidly separated precipitating, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water Reservoir is transported to user to water supply network, the sludge high-performance that is precipitated in sedimentation basin, the etch-proof stainless steel of low energy consumption or Engineering plastics dredge pump is extracted out, and moisture content is reduced to 50% hereinafter, being then delivered to micro- fertile workshop manufacture after the sludge press filtration of extraction Microelement biological humic organic fertilizer is got a profit into market sale, or fortune goes fertilizer plant to make fertilizer.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, every processing 1 Ton sewage consumes≤0.1 degree of electricity.
The method that above-mentioned urban wastewater treatment and resource recycling utilizes, in step (2) electrochemical treatments, electrolytic cell Structure include: sink, electrode bar, sewage water inlet pipe, inlet distribution device, air blower or aerator, air intake duct and sky Gas dispenser, electrode bar are mounted at the inner peripheral wall along sink, form the pattern of inside and outside two circle, the electrode bar and electricity of outer ring The cathode in source is connected, and the electrode bar of inner ring is connected with the anode of power supply, and positive and negative electrode stick respectively connects, and is not in contact with each other mutually absolutely Edge, air intake duct are connected to air blower or aerator, and are connected at the air dispersers of bottom of electrolytic tank, in sewage transport In process, by the inlet distribution device of bottom of electrolytic tank, then plus aeration stirring, plug-flow so that sewage does not stop to turn in a cell Rise continuous flowing;It is equipped with overflow weir in the edge of electrolytic cell upper end, is connected with outlet pipe in overflow weir, outlet pipe is connected to heavy In the pond of shallow lake.
Wastewater treatment efficiency
It is detected to the discharge water outlet that processing sewage obtains is carried out using method of the invention, testing result are as follows: through locating The water quality of water is given off after reason better than urban wastewater treatment firm specified in " integrated wastewater discharge standard " (GB18918-2002) The primary standard for handling discharge, reaches the index of recycle-water, shown in table specific as follows:
It is above-mentioned as it can be seen that using urban wastewater treatment of the present invention and resource recycling using method sewage is handled, The water quality of obtained water outlet has been better than discharge standard specified in " integrated wastewater discharge standard " (GB18918-2002), reaches back With the index of water.

Claims (1)

1. a kind of method that urban wastewater treatment and resource recycling utilize, which is characterized in that comprise the technical steps that:
(1) sewage disinfection treatment, city planting ductwork is by the municipal sewage of dispersion, after converging liquid collecting, carries out sand setting to sewage and removes Slag treatment, And adjusting the pH of sewage with neutralization regulator is 7.5-9, and the SS value of sewage is made to be reduced to 50mg/L hereinafter, being then injected into collecting tank In, 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, make sewage from It is above lower to be constantly injected into the bottom of electrolytic cell and flow to each place of bottom of electrolytic tank by inlet distribution device;
(2) electrochemical treatments, pretreated sewage enter electrolytic cell, and electrolytic cell is connected with aerator or air blower, electrolytic cell In electrode is installed, electrode connects positive and negative polarities DC power supply respectively, the voltage between two pole plates be 5~110V, open direct current Power supply carries out continuous electrochemical processing to sewage, and the mean residence time of sewage in a cell is 15-60 minutes, and sewage passes through Sewage water inlet pipe constantly enters in electrolytic cell, the supernatant liquor in electrolytic cell Jing Guo electrochemical treatments, then successive overflow And go out to inject in sedimentation basin by overflow weir through outlet pipe and staticly settle,
(3) precipitation process and resource utilization: the sewage after electrochemical treatments flows into sedimentation basin, and water and residue are fast in sedimentation basin Fast precipitation and separation, Water warfare clarification, mode of the net liquid of sedimentation basin at the middle and upper levels also by overflow, successive injected clear water storage Pond is transported to user to water supply network, and the sludge being precipitated in sedimentation basin is extracted out with dredge pump, defeated after the sludge press filtration of extraction It is sent to micro- fertile workshop or fertilizer plant makees fertilizer;
Neutralization regulator as described in step (1) is sodium carbonate, sodium hydroxide, milk of lime, sulfuric acid or hydrochloric acid;
In step (1), by the mode of sewage injection collecting tank are as follows: so that sewage overflow is injected collecting tank using height fall, or make Sewage is injected in collecting tank with sewage pump;
In step (2) electrochemical treatments, the electrode material of the anodes in electrolytic cells is mild steel, graphite, contains precious metal Platinum, ruthenium, palladium, iridium or rhodium coatings metal anode and be coated with TiO2-RuO2 One of titanium-base anode of coating, cathode Electrode material is mild steel;
In step (3) resource utilization, moisture content is reduced to 50% or less after the sludge press filtration of Precipitation;
In step (2) electrochemical treatments, the structure of electrolytic cell includes: sink, electrode bar, sewage water inlet pipe, inlet distribution device, drum Blower or aerator, air intake duct and air dispersers, electrode bar is mounted at the inner peripheral wall along sink, in formation The pattern of outer two circle, the electrode bar of outer ring are connected with the cathode of power supply, and the electrode bar of inner ring is connected with the anode of power supply, positive negative electricity Pole stick respectively connects, and be not in contact with each other mutually insulated, and air intake duct is connected to air blower or aerator, and is connected at electrolytic cell The air dispersers of bottom are equipped with overflow weir in the edge of electrolytic cell upper end, outlet pipe are connected in overflow weir, outlet pipe connects It is connected in sedimentation basin.
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CN201817307U (en) * 2010-09-26 2011-05-04 上海交通大学 Integral nitrogen and phosphorus removal electrolysis unit
CN202080972U (en) * 2011-04-29 2011-12-21 东莞市星火环保科技有限公司 Treatment system for printing and dyeing waste water
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