CN102674628B - Sewage treatment and regeneration cyclic utilization device and sewage treatment and regeneration cyclic utilization method - Google Patents
Sewage treatment and regeneration cyclic utilization device and sewage treatment and regeneration cyclic utilization method Download PDFInfo
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
-
- 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
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a sewage treatment and regeneration cyclic utilization device, which is provided with a biochemical system, an electrolysis system, a membrane biological reactor (MBR) system and a deep processing system. A sewage treatment and regeneration cyclic utilization method comprises the following steps of (1) biochemical treatment; (2) electrolysis; (3) MBR system filtering; (4) capacitance desalting and sterilization; and (5) sludge treatment. The device and the method can overcome the defects that in the existing sewage regeneration technology, the quality of the regeneration water is poor, the water consumption water quality requirements are difficult to meet, the investment is high, the operation cost is high, the secondary pollution is caused on the environment, and the like. The sewage discharge can be reduced, the utilization efficiency of the water is improved, meanwhile, the regeneration and the reutilization on the sludge are realized, and the harm possibly caused by the sludge to the environment is eliminated.
Description
Technical field
The present invention relates to a kind of sewage disposal and recycling utilization devices and methods therefor, belong to field of environment protection.
Background technology
Water resources and problem of environmental pollution are subjected to the attention of human society day by day, fresh water dosage constantly increases on the one hand, water resources is in short supply day by day, quantity of wastewater effluent is increasing on the other hand, environmental pollution is serious day by day, therefore, sewage disposal and renewable resource recycle more and more are subjected to the attention of various countries.China is the country of a water resources famine, the Freshwater resources occupancy volume only is 1/4th of world average level per capita, be one of 13 countries of lack of water in the world, at present, in more than 600 city, the whole nation, more than 400 urban water shortage arranged, so the regeneration effluent recycle becomes the key that solves the Freshwater resources deficiency.But, the current sewage disposal of China mostly is qualified discharge, ripe regeneration effluent recycle utilization is few, be applied to the few especially of engineering practice, there is every day a large amount of sewage just directly to enter rivers, lake, marine site through handling back up to standard, not only cause the waste of water resources but also polluted environment, if things go on like this will cause the unsustainable development of water resources.It is introduced that in China's city water resource wastage in bulk or weight, process water accounts for 2/3 greatly, as with being used for process water after the sewage process manipulation of regeneration, aspect water saving, very big potentiality will be arranged, equaled to increase by 2/3 Freshwater resources total amount.
In recent years, China environmentalist is in sewage disposal, extensive work has been made in the recycling utilization aspect, Chinese patent CN200410024576.8 discloses " a kind of sewage extracts technology and the specific equipment of reuse water ", it is after sewage is handled through enzyme, again the method for producing reuse water with ozonization after filtration.Chinese patent CN101108760B discloses the reuse water recycle method of handling through continuous Microfiltration through the sewage that reaches emission standard after the biochemical treatment, it is that tail water with bio-chemical effluent is as source water, enter intermediate pool through cyclone coagulation reaction tank, advection multi-bucket sedimentation basin materialization post precipitation, deliver to that the continuous Microfiltration system carries out advanced treatment and the method for producing reuse water by lift pump.Although the method for regeneration effluent is existing many, governments at all levels and numerous environmentalists are also doing a large amount of work aspect the regeneration effluent recycle, but the reusing sewage amount in process water proportion but less than 2%, the field of reusing sewage also is only limited to the industry not high to water quality requirement, afforest, flush the toilet etc. as industrial flushing cinder dedusting water, water coolant, enterprises and use mixedly, then attempting seldom aspect the higher production technique water of water quality requirement.Analyze its reason, main there are the following problems in industrial recycle because of sewage: 1, reuse water is of low quality: show that at first existing sewage purification regeneration techniques is difficult to remove residual colourity and the stink in the sewage, also residual in the reuse water have various nutritive substances and bacterium, mould, algae etc., running into suitable temperature, illumination condition namely can breed rapidly and cause water body blackout smelly, and produce reluctant biofouling, also can cause detrimentally affect to processing unit, reuse water be used in industrial production be greatly limited; Next is total dissolved salt content height in the sewage, and contain the calcium magnesium salts material that can form incrustation scale in a large number, when it is transported to watering technology equipment by pipeline, can be because of long-term galvanic corrosion effect, watering equipment is damaged, along with the circulation constantly in watering equipment of calcium magnesium salts in the water concentrates, further form incrustation scale, can cause watering equipment to block.2, uneconomical economically: handle through multistage film behind the biochemistry, though can realize regeneration effluent, the disposable apparatus investment is big; running cost is higher than existing water price from the beginning; weigh from economical standard, still not fully up to expectations, the reused water processing recycle can't realize mass-producing.3 secondary pollutions: traditional reclaimed water reuse technology in to the scavenging process of sewage, usually adopt add flocculation agent and sterilant to water in microorganism, colloid thing, solid particulate carry out post precipitation, pass through the purification process of sand filtration filtration, multi-medium filtering and membrane filtration again, its shortcoming is will add flocculation agent and disinfectant in the treating processes, not only the investment is big, running cost is higher, and the flocculation agent that adds and sterilant also cause in various degree pollution to environment.By above problem as can be known; research and development are fit to safe, reliable, efficient, the less energy-consumption of China's economic present situation and developmental level, low investment, reuse water recycle utilization and support equipment cheaply, and establishing solid basis for mass-producing, the industrialized development of reclaimed water reuse becomes an extremely urgent task.
Summary of the invention
The objective of the invention is to the problem at existing regeneration effluent recycle utilization existence, provide a kind of overcome in the existing regeneration effluent technology reuse water second-rate, be difficult to satisfy industrial production technique water water quality requirement, and investment is big, running cost is high and environment produced defective such as secondary pollution, can reduce sewage discharge, improve the waste disposal plant of the utilising efficiency of water.
Another object of the present invention is to provide a kind of sewage disposal and recycling utilization method.
Sewage disposal of the present invention and recycling utilization device are provided with biochemical system, electrolytic system, MBR system and advanced treatment system;
Described biochemical system is used for that sewage is carried out biochemical treatment and obtains bio-chemical effluent, and biochemical system is provided with Vatch basin, coarse rack, lift pump, fine fack, settling pit, one-level distributing well, preliminary sedimentation tank, biological treating equipment, secondary distributing well, second pond and sludge reflux pump; The import of Vatch basin connects with outfall by pipeline, the outlet of Vatch basin connects the import of coarse rack, the outlet of coarse rack connects the import of lift pump, promote the import that pump outlet connects fine fack, the outlet of fine fack connects the import of settling pit, the outlet of settling pit connects the import of one-level distributing well, the outlet of one-level distributing well connects the import of preliminary sedimentation tank, the deliver a child import of thing treatment facility of the outlet of preliminary sedimentation tank, the outlet of biological treating equipment connects the import of secondary distributing well, the outlet of secondary distributing well connects the import of second pond, the water outlet of second pond connects with the import of electrolytic system, the sludge outlet of second pond then one the tunnel connects with the import of biological treating equipment through sludge reflux pump, and another road connects with the import of sludge treating system.
Described biochemical system also comprises a sludge treating system, sludge treating system is used for the mud that biochemical system produces is carried out recycling utilization, and sludge treating system is provided with stopping valve, one-level sludge pump, electrolysis machine, surge tank, secondary sludge pump, sump pump and sludge dehydration device; The import of stopping valve connects by the sludge outlet that pipeline connects second pond, the outlet of stopping valve connects the import of one-level sludge pump, one-level mud pump outlet connects the import of electrolysis machine, the outlet of electrolysis machine connects the import of surge tank, the water outlet of surge tank is through the deliver a child water-in of thing treatment facility of sump pump, surge tank sludge outlet then connect the import of sludge dehydration device through the secondary sludge pump, the filtrate outlet of sludge dehydration device connects with the water-in of second pond by pipeline, and sludge dehydration device is handled the mud cake of gained and then transported outward.
Described biological treating equipment is one or more combination of anaerobic pond, anoxic pond, aeration tank, oxidation ditch, sequencing batch reactor (SBR), biological filter, blodisc or biological contact oxidation pond.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode in the electrolyzer is a kind of in the alloy of graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, metal and the nano-catalytic noble electrode etc.; The top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, the substrate of described nano-catalytic noble electrode can be titanium plate or plastic plate etc., kind electrode has higher electrocatalytic reaction activity, can reduce the overpotential of electrolysis significantly, reduce the generation of side reaction.
Described sludge dehydration device is a kind of in vacuum filtering and dewatering device, filter-press dehydration device, centrifugal dehumidifier and the membrane filter appts, described filter-press dehydration device is the two a kind of of belt filter press, plate-and-frame filter press, and described membrane filter appts is a kind of in the two of micro-filtration, ultrafiltration; The membrane module of described micro-filtration is a kind of in the two of ceramic membrane, metallic membrane assembly, and the membrane module of described ultrafiltration is a kind of in the two of ceramic membrane, metallic membrane assembly.
Described electrolytic system is used for the biochemical treatment sewage effluent is carried out electrolysis treatment, and electrolytic system is provided with stopping valve, working shaft and electrolysis machine; The external bio-chemical effluent relief outlet of the import of stopping valve, the import of working shaft connects the outlet of stopping valve, and the water supply pump outlet connects the import of electrolysis machine, and the outlet of electrolysis machine connects with the import of MBR system.
Described MBR system is used for the electrolytic system gained purified waste water and is further processed, and the MBR system is provided with stopping valve, grid, MBR reaction tank, MBR membrane module, gas blower, aerator, residual sea water pump, goes out water pump, elementary reuse water basin and MBR cleaning system; The import of described stopping valve connects the outlet of the electrolysis machine of electrolytic system, the import of stopping valve outlet adapting grille, the outlet of grid connects the import of MBR reaction tank, the MBR membrane module is immersed in the MBR reaction tank, aerator by gas blower and distribution carries out aeration to it, the filtrate outlet of MBR reaction tank picks out the import of water pump, the water outlet pump outlet connects the import of elementary reuse water basin, the sludge outlet of MBR reaction tank connects the import of residual sea water pump, and mud is pumped to sludge treating system through residual sea water pump and handles; Optional a kind of in polyvinylidene difluoride (PVDF) (PVDF) hollow-fibre membrane, polypropylene (PP) hollow-fibre membrane, polysulfones (PS) hollow-fibre membrane, polyethersulfone (PES), polyacrylonitrile (PAN) and polyvinyl chloride (PVC) hollow-fibre membrane etc. of described MBR membrane module, the membrane pore size of described MBR membrane module can be 0.10～0.2 μ m, can efficiently carry out solid-liquid separation, operating pressure is-1～-50kPa, working temperature is 5～45 ℃, applicable pH is 1～14, go out the hydropexis suspended substance and can be down to 1mg/L, turbidity can be down to below the 1NTU.Bacterium and the intestinal bacteria in the sewage can thoroughly be removed by this system, and the coliform of water outlet is 0, and total number of bacterial colony is lower than 1CFU/mL; Described MBR cleaning system is used for cleaning the MBR membrane module, and the MBR cleaning system is provided with cleaning fluid tank, backwashing pump and stopping valve; The outlet of cleaning fluid tank connects the import of backwashing pump, and the back flushing pump outlet connects the import of stopping valve, and the outlet of stopping valve meets the MBR system.
Described advanced treatment system is used for the elementary reuse water of MBR system handles gained is carried out electric capacity absorption desalination, separation, must dialyse water and condensed water, dialysis water further obtains reuse water by sterilization, and advanced treatment system is provided with stopping valve, lift pump, security personnel's strainer, working shaft, electric capacity desalting plant, sterilizing unit, reuse water basin and condensed water topping-up pump; The import of described stopping valve connects the outlet of MBR system primary reuse water basin, the stopping valve outlet connects the import of lift pump, promote the import that pump outlet connects security personnel's strainer, the outlet of security personnel's strainer connects the import of working shaft, the import of working shaft connects the import of electric capacity desalting plant, the dialysis water out of electric capacity desalting plant connects the import of sterilizing unit, and the outlet of sterilizing unit connects the import of reuse water basin; Advanced treatment system with working shaft pumps into electric capacity desalting plant through security personnel behind the strainer with the elementary reuse water of MBR system gained, through the electric capacity desalting plant handle dialysis water and condensed water, dialysis water enters basin and gets reuse water after the sterilizing unit sterilization; Condensed water then refluxes through the condensed water topping-up pump and enters electrolytic purification system and recycle; Described sterilizing unit is a kind of in electrolysis machine, chlorination system, disinfection by chlorine dioxide device, ozonization system and the uv steriliser; Described electrolysis machine is provided with power supply and electrolyzer; Described chlorination system is provided with chlorinating machine, contact tank, mixing equipment and chlorine bottle; Described ozonization plant is provided with ozonizer, ozone contact tank and tail gas ozone splitter.
A kind of sewage disposal of the present invention and recycling utilization method may further comprise the steps:
1) biochemical treatment: sewage enters biochemical system through Vatch basin, by handling the pollution substances such as grease, scum silica frost, SS, COD and BOD that reduce in the sewage, make its every index reach three grades of emission standards of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard ", enter the subsequent disposal operation again;
2) electrolysis: bio-chemical effluent after water pump extracts, is carried out electrolysis in the input electrolysis machine;
In step 2) in, described electrolysis is the oxygen [O] that bio-chemical effluent is made it to generate chlorine [Cl], hydroxyl [OH] and the status nascendi of status nascendi through electrolysis, in order to organism and ammonia nitrogens such as the vegetable and animals oils in the oxygenolysis sewage, petroleum-type, anion surfactant, coloring matters, and kill microorganism in the sewage, simultaneously, under electric field action, make suspended substance, colloid, charged corpuscle cohesion in the sewage form larger particles; The operating voltage of the electrolyzer of described electrolysis can be 2～250V, and adjacent two interelectrode voltages can be 2～18V, and adjacent two interelectrode optimum voltages are 3～8V, and current density can be 3～400mA/cm
2, the best is 50～210mA/cm for current density
2, bio-chemical effluent enters the MBR system through electrolysis by valve.
3) MBR system filtration: will handle purifying waste water of gained through electrolytic system and flow into the MBR system through pipeline, carry out the MBR system handles separate elementary reuse water;
In step 2) in, described MBR system is the novel wastewater processing technology that membrane separation technique and biotechnology organically combine, it utilizes membrane separation plant that the active sludge in the biochemical reaction tank and larger molecular organics matter are held back, and has advantages such as adaptability is strong, biochemical efficiency is high, anti-load impact ability is strong, floor space is little, treatment effect is good.
4) electric capacity desalination and sterilization: will pump into the electric capacity desalting plant through working shaft through the elementary reuse water of MBR system filtration gained, desalination separate dialysis water and condensed water, dialysis water gets reuse water through entering basin behind the sterilizing unit;
In step 4), the operational condition of described electric capacity desalination is volts DS 110V/m ~ 2 * 10
6V/m.
5) sludge treatment: the mud that biochemical system produces enters sludge treating system, structure through electrolysis and contact reacts destruction mud, crack the microbial cell wall, the microorganism intracellular organic matter flows out, enter water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, and then be back in the biological treating equipment by sump pump, be Institute of Micro-biology's recycle; Excess sludge then enters sludge dehydration device and gets filtrate and mud cake, and filtrate is back to second pond through pipeline, and mud cake is then transported outward.
Adopt the present invention that sewage is handled, the reuse water water quality that produces is good, every index is much better than GB/T19923-2005 " urban sewage reutilization process water water quality " standard, can be used as the production technique water of the industry of various industries, namely be applied directly in each operation of production of industry, reach the purpose of cleaner production.Simultaneously, the present invention can also handle mud, by organic composition in dissolving, the oxidized sludge, be back to biological treating equipment again and carry out Circulation, make that not only microorganism wall is destroyed in the mud, the tenuigenin stripping, improved the biodegradability of mud, be convenient to the degraded of follow-up microorganism, thereby reduce excess sludge production, and the tenuigenin of stripping also can be used as the carbon source of microorganism, replenish its nutritive substance, thereby the increase biological activity improves the efficient of biological treatment of sewage, reaches the effect of sewage, the dual processing of mud.
Adopt this technological line to solve existing sewage disposal and recycling utilization technical barrier, have following advantage:
1, the present invention adopts the method for electrolysis treatment sewage, has following outstanding effect: (1) electrolysis under galvanic action makes macromole open loop or the chain rupture that residues in the sewage, strengthens the biodegradability of sewage; (2) oxygen [O] and the oxygenolysis organism of chlorine [Cl], hydroxyl [OH] and the status nascendi of the status nascendi of electrolysis generation reduce COD fast; (3) ammonia nitrogen in the oxygenolysis sewage makes the further oxidation of residual ammonia nitrogen, and the decreasing ratio of ammonia nitrogen can reach 80～90%, eliminates stink in the water simultaneously.(4) reduce the colourity of sewage significantly, pass through several different methods such as biochemistry, materialization and handled the colourity of back second pond water outlet between 80～300, general treatment process is difficult to further remove colourity, the colourity of sewage can be reduced to 16～32 between 80～300 through electrolysis.(5) suspended substance, colloid, charged corpuscle in the sewage condensed form larger particles under electric field action after, remove to such an extent that purify waste water through follow-up MBR system filtration.(6) heavy metal ion in the sewage moves to the negative electrode of electrolysis machine electrolyzer, forms precipitation at negative electrode, thereby reduces the heavy metal ion content in the sewage.
2, reduce the COD of sewage total release, significantly improve Biodegradability of Wastewater: traditional biochemical end adds membrane filtration technique, though can realize water reuse in the part, but can not reduce the total release of COD of sewage, the oxygen [O] of chlorine [Cl], hydroxyl [OH] and the status nascendi of the status nascendi that electrolysis of the present invention produces makes macromole open loop or chain rupture and the rapid oxygenolysis organism that residues in the sewage, not only reduce the total release of COD of sewage significantly, and improve the biodegradability of sewage;
3, reuse water rate height, cost are low: the reclamation rate of sewage is up to 70%～90%, and sewage effluent is few, and energy consumption is low, and high-purity regenerated aquatic product cost is lower than 1 yuan/ton, far below existing water price from the beginning;
4, reuse water quality height: the reuse water that adopts this technological line to produce is colourless, tasteless, and water quality leading indicator such as table 1 can satisfy the water quality requirement of various industry process waters;
Table 1 reuse water water-quality guideline
5, the present invention adopts electrolysis treatment mud to have following outstanding effect: (1) destroys the mud structure, and mud flco structure is changed, and accelerates sludge hydrolytic; (2) suppress and kill microorganism and virus in the mud, can produce the free radical that has strong oxidizing property in a large number in the electrolytic process, can not only penetrate and penetrate in the microbial cell, the dna replication dna of blocking-up microorganism, can also oxygenolysis microbial cell wall, the cellularstructure of destroy microorganisms makes tenuigenin enter into mud, make and suppress sludge hydrolytic and killing microorganisms; On the other hand, microorganisms a large amount of in the mud is electronegative, under effect of electric field, loses the dead back sedimentation of biological activity thereby these electronegative microorganisms lose electronics; (3) deodorizing, the osmophore in multiple radical (chlorine [Cl], hydroxyl [OH] and oxygen [O]) the oxygenolysis mud that electrolysis produces is removed stench, improves the overall work environment of mud decrement treatment process significantly; (4) decompose large amount of organic in the mud, electrolysis makes macromole open loop or the chain rupture in the mud under galvanic action, make the macromolecular substance of difficult for biological degradation be decomposed into small-molecule substance, B/C brings up to 0.3～0.6 from 0.1～0.2 with mud, the biodegradability of enhancing mud, making it easier is that Institute of Micro-biology utilizes.
6, organic composition in dissolving, the oxidized sludge, make the solidity material of difficult degradation become the dissolved matter of easy degraded, be back to biological treating equipment again and carry out Circulation, not only can be the microorganism supplementary carbon source, by the microbial metabolism recycling, improve the efficient of biological treatment of sewage as its nutritive substance; And can be by the decomposition reaction of microorganism, degraded is by cracking bacteriogenic dissolved matter, thereby reaches the raising wastewater treatment efficiency, reduces the dual purpose of excess sludge production, realizes the recycling utilization of mud.
7, the regeneration by mud reduces the total amount of mud, can eliminate the harm that mud may cause environment on the one hand, saves transportation cost on the other hand, reduces and takes up an area of, and pays the landfill expense less.
Description of drawings
Fig. 1 is that the structure of sewage disposal of the present invention and recycling utilization device embodiment is formed synoptic diagram.
Embodiment
The present invention be after the comparative study of composition, character and the existing processing scheme of existing sewage work bio-chemical effluent being goed deep into system, finish to the purification of sewage and the design of recycling utilization technology, combination by technologies such as biochemical system, electrolysis, MBR system, electric capacity desalinations is used, thereby forms a kind of sewage disposal and recycling utilization devices and methods therefor.
Following embodiment will the present invention is further illustrated by reference to the accompanying drawings.
Referring to Fig. 1, a kind of sewage disposal of the present invention and recycling utilization devices and methods therefor embodiment are provided with:
Biochemical system: biochemical system is used for that sewage is carried out biochemical treatment and obtains bio-chemical effluent, and biochemical system is provided with Vatch basin 1, coarse rack 2, lift pump 3, fine fack 4, settling pit 5, one-level distributing well 6, preliminary sedimentation tank 7, biological treating equipment 8, secondary distributing well 9, second pond 10, sludge reflux pump 11 and stopping valve 12; The import of Vatch basin 1 connects with outfall by pipeline, the outlet of Vatch basin 1 connects the import of coarse rack 2, the outlet of coarse rack 2 connects the import of lift pump 3, the outlet of lift pump 3 connects the import of fine fack 4, the outlet of fine fack 4 connects the import of settling pit 5, the outlet of settling pit 5 connects the import of one-level distributing well 6, the outlet of one-level distributing well 6 connects the import of preliminary sedimentation tank 7, the deliver a child import of thing treatment facility 8 of the outlet of preliminary sedimentation tank 7, the outlet of biological treating equipment 8 connects the import of secondary distributing well 9, the outlet of secondary distributing well 9 connects the import of second pond 10, the water outlet of second pond 10 connects with the import of electrolytic system, the sludge outlet one tunnel of second pond 10 is through sludge reflux pump 11, stopping valve 12 connects with the import of biological treating equipment 8, and another road connects with the import of sludge treating system.
Sludge treating system: sludge treating system is used for the mud that biochemical system produces is carried out recycling utilization, and sludge treating system is provided with stopping valve 21, one-level sludge pump 22, electrolysis machine 23, surge tank 24, stopping valve 25, secondary sludge pump 26, sump pump 27, stopping valve 28 and sludge dehydration device 29; The import of stopping valve 21 connects by the sludge outlet that pipeline connects second pond, the outlet of stopping valve 21 connects the import of one-level sludge pump 22, the outlet of one-level sludge pump 22 connects the import of electrolysis machine 23, the outlet of electrolysis machine 23 connects the import of surge tank 24, the water outlet of surge tank 24 is successively through sump pump 27, the deliver a child water-in of thing treatment facility 8 of stopping valve 28, surge tank 24 sludge outlet then successively through stopping valve 25, secondary sludge pump 26 connects the import of sludge dehydration device 29, the filtrate outlet of sludge dehydration device 29 connects by the water-in of pipeline with second pond 10, and the mud cake that sludge dehydration device 29 is handled gained is then transported outward.
The electrode of described electrolysis machine 23 is the nano-catalytic noble electrode, its top layer is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, the substrate of described nano-catalytic noble electrode can be titanium plate or plastic plate etc., kind electrode has higher electrocatalytic reaction activity, can reduce the overpotential of electrolysis significantly, reduce the generation of side reaction.
Electrolytic system: electrolytic system is used for electrolysis treatment, and electrolytic system is provided with stopping valve 31, working shaft 32 and electrolysis machine 33.The external bio-chemical effluent relief outlet of the import of stopping valve 31, the import of working shaft 32 connects the outlet of stopping valve 31, and the outlet of working shaft 32 connects the import of electrolysis machine 33, and the outlet of electrolysis machine 33 connects with the water-in of MBR system.
The top layer of the nano-catalytic noble electrode of the electrolysis machine 33 of described electrolytic system is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
The MBR system: the MBR system is further processed for the electrolytic system gained is purified waste water.The MBR system establishes stopping valve 41, grid 42, MBR membrane module 43, gas blower 44, aerator 45, MBR reaction tank 46, residual sea water pump 47, goes out water pump 48 and elementary reuse water basin 49.The import of stopping valve 41 connects the outlet of electrolysis machine 33, the import of the outlet adapting grille 42 of stopping valve 41, the outlet of grid 42 successively through MBR reaction tank 46, go out water pump 48 and enter elementary reuse water basin 49, the sludge outlet of MBR reaction tank 46 connects the import of residual sea water pump 47, and mud is pumped to sludge treating system through residual sea water pump 47 and handles.
The MBR cleaning system: the MBR cleaning system is used for cleaning the MBR system, is provided with cleaning fluid tank 51, backwashing pump 52 and stopping valve 53.The outlet of cleaning fluid tank 51 connects the import of backwashing pump 52, and the outlet of backwashing pump 52 connects the import of stopping valve 53, and the outlet of stopping valve 53 connects the outlet of MBR reaction tank 43.
Advanced treatment system: advanced treatment system is used for the elementary reuse water of MBR system handles gained is carried out electric capacity absorption desalination, separation, must dialyse water and condensed water, dialysis water further obtains reuse water by sterilization, and advanced treatment system is provided with stopping valve 61, lift pump 62, security personnel's strainer 63, working shaft 64, electric capacity desalting plant 65, stopping valve 66, sterilizing unit 67, stopping valve 68, reuse water basin 69 and condensed water topping-up pump 70; The import of described stopping valve 61 connects the outlet of MBR system primary reuse water basin 49, stopping valve 61 outlets connect the import of lift pump 62, the outlet of lift pump 62 connects the import of security personnel's strainer 63, the outlet of security personnel's strainer 63 connects the import of working shaft 64, the import of working shaft 64 connects the import of electric capacity desalting plant 65, the dialysis water out of electric capacity desalting plant 65 connects the import of sterilizing unit 67 through stopping valve 66, and the outlet of sterilizing unit 67 connects the import of reuse water basin 69 through stopping valve 68.
The operational condition of the electric capacity desalting plant 65 of described advanced treatment system is volts DS 110V/m ~ 2 * 10
6V/m.
Provide the specific embodiment of sewage disposal and recycling utilization method below in conjunction with Fig. 1.
Embodiment 1
1000 ton per day sewage disposals and recycling utilization engineering.
The water quality situation of described sewage is as shown in table 2.
The water quality situation of table 2 sewage
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 350 | 5 | Turbidity | NTU | 19 |
| 2 | BOD 5 | mg/L | 180 | 6 | Colourity | Doubly | 50 |
| 3 | SS | mg/L | 270 | 7 | pH | — | 7.5 |
| 4 | TN | mg/L | 30 | 8 | Specific conductivity | μS/cm | 380 |
Step 1, biochemical treatment: sewage enters biochemical system through Vatch basin 1, pass through the processing of coarse rack 2, lift pump 3, fine fack 4, settling pit 5, one-level distributing well 6, preliminary sedimentation tank 7, biological treating equipment 8, secondary distributing well 9 and second pond 10 successively, make its every index reach three grades of emission standards of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard ", enter the subsequent disposal operation again.
Step 2, electrolysis: starting working shaft 32, sewage enters electrolysis machine 33 through stopping valve 31 and carries out electrolysis.
The top layer of the nano-catalytic noble electrode of the electrode of the used electrolysis machine 33 of described electrolysis is coated with the metal oxide inertia catalyst coatings that crystal grain is 10nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
The operating voltage of described electrolysis is 6V, and the voltage of two interpolars is 3.5～8.0V, current density 350mA/cm
2
Step 3, MBR system filtration are separated: enter in the MBR reaction tank 46 after purifying waste water again after the electrolysis removes by filter the solid impurity, colloid of the larger particles that produces because of electrolysis in the sewage through grid 41, start gas blower 44 and aerator 45, after the oxidation of sewage process aeration, start and water pump 48, under suction function, water molecules sees through MBR membrane module 43 to be separated, and gets dialysis water, and dialysis water is collected in the elementary reuse water basin 49.
The mould material of described MBR system is polyvinylidene difluoride (PVDF) (PVDF) hollow-fibre membrane in 0.2 micron in aperture.The operating pressure that the MBR system separates is-25～-26 kPa, and working temperature is 15～40 ℃, and the pH value is 5～9.
Step 4, electric capacity desalination and sterilization: will pump into electric capacity desalting plant 65 through stopping valve 61, lift pump 62, security personnel's strainer 63, working shaft 64 successively through the elementary reuse water of MBR system filtration gained, desalination separate dialysis water and condensed water, dialysis water through enter behind the electrolysis machine 67 reuse water basin 69 reuse water.The reclamation rate of sewage is 87%, and the water quality situation of reuse water is as shown in table 3.
The operational condition of described electric capacity desalting plant 65 is volts DS 110V/m ~ 2 * 10
6V/m.
Above-mentioned electrolysis machine 67 is sterilizing unit.Certainly, sterilizing unit can be a kind of in electrolysis machine, chlorination system, disinfection by chlorine dioxide device, ozonization system and the uv steriliser.
Step 5, sludge treatment: the mud that biochemical system produces enters sludge treating system, pumps into electrolysis machine 23 electrolysis through one-level sludge pump 22.The top layer of the nano-catalytic noble electrode of described electrolysis machine 23 electrodes is coated with the metal oxide inertia catalyst coatings that crystal grain is 32 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.Operating voltage is 12V, and the voltage of two interpolars is for 3.5～8.0V, current density 200mA/cm
2Mud after the electrolysis enters surge tank 24, the free radical that makes electrolysis produce further carries out contact reacts with mud, destroy the structure of mud, crack the microbial cell wall, make mud flco structure change, the microorganism intracellular organic matter flows out, enter water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, and then be back in the biological treating equipment 8 by sump pump 27, be the microorganism recycle, not only can be the microorganism supplementary carbon source, can be improved the efficient of biological treatment of sewage by the microbial metabolism recycling; And can be by the decomposition reaction of microorganism, degraded is by cracking bacteriogenic dissolved matter, thereby reaches the purpose that reduces excess sludge production.Excess sludge then enters centrifugal dehumidifier 29 by secondary sludge pump 26 and gets filtrate and mud cake, and filtrate is back to second pond 10 through pipeline, and mud cake is then transported outward.
Above-mentioned centrifugal dehumidifier 29 is sludge dehydration device.Certainly, sludge dehydration device can be a kind of in vacuum filtering and dewatering device, filter-press dehydration device, centrifugal dehumidifier and the membrane filter appts, described filter-press dehydration device is a kind of in the two of belt filter press, plate-and-frame filter press, described membrane filter appts is a kind of in the two of micro-filtration, ultrafiltration, the membrane module of described micro-filtration is a kind of in the two of ceramic membrane, metallic membrane assembly, and the membrane module of described ultrafiltration is a kind of in the two of ceramic membrane, metallic membrane assembly.
The water quality situation of table 3 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | ≤5 | 5 | Turbidity | NTU | ≤1 |
| 2 | BOD 5 | mg/L | ≤5 | 6 | Colourity | Doubly | ≤2 |
| 3 | SS | mg/L | ≤1 | 7 | pH | — | 7.2 |
| 4 | TN | mg/L | ≤4 | 8 | Specific conductivity | μS/cm | ≤200 |
Embodiment 2
Deep purifying regeneration and the recycle engineering of 5000 ton per day sewage.
The water quality situation of described sewage is as shown in table 4.
The water quality situation of table 4 sewage
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 289 | 5 | Turbidity | NTU | 16 |
| 2 | BOD 5 | mg/L | 114 | 6 | Colourity | Doubly | 80 |
| 3 | SS | mg/L | 250 | 7 | pH | — | 7.4 |
| 4 | TN | mg/L | 42 | 8 | Specific conductivity | μS/cm | 510 |
Step 1, biochemical treatment: sewage enters biochemical system through Vatch basin 1, pass through the processing of coarse rack 2, lift pump 3, fine fack 4, settling pit 5, one-level distributing well 6, preliminary sedimentation tank 7, biological treating equipment 8, secondary distributing well 9 and second pond 10 successively, make its every index reach three grades of emission standards of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard ", enter the subsequent disposal operation again.
Above-mentioned biological treating equipment 8 is oxidation ditch.Certainly, biological treating equipment can be one or more combination of anaerobic pond, anoxic pond, aeration tank, oxidation ditch, sequencing batch reactor (SBR), biological filter, blodisc and biological contact oxidation pond.
Step 2, electrolysis: starting working shaft 32, sewage enters electrolysis machine 33 through stopping valve 31 and carries out electrolysis.The electrode of described electrolysis machine 33 is that the top layer is coated with the nano-catalytic noble electrode that crystal grain is the metal oxide inertia catalyst coatings of 15nm, and the substrate of described nano-catalytic noble electrode is the titanium plate.The operating voltage of described electrolysis is 100V, and the voltage of two interpolars is 2～18V, current density 3mA/cm
2
Above-mentioned nano-catalytic inert material is the electrode materials of electrolysis machine.Certainly, electrode materials can be a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the nano-catalytic inert material.
Step 3, MBR system filtration are separated: enter in the MBR reaction tank 46 after purifying waste water again after the electrolysis removes by filter the solid impurity, colloid of the larger particles that produces because of electrolysis in the sewage through grid 41, start gas blower 44 and aerator 45, after the oxidation of sewage process aeration, start and water pump 48, under suction function, water molecules sees through MBR membrane module 43 to be separated, and gets dialysis water, and dialysis water is collected in the elementary reuse water basin 49.
The mould material of described MBR system is polypropylene (PP) hollow-fibre membrane in 0.1 micron in aperture.The operating pressure that the MBR system separates is-20～-23 kPa, and working temperature is 5～45 ℃, and pH is 5～9.
Step 4, electric capacity desalination and sterilization: will pump into electric capacity desalting plant 65 through stopping valve 61, lift pump 62, security personnel's strainer 63, working shaft 64 successively through the elementary reuse water of MBR system filtration gained, desalination separate dialysis water and condensed water, dialysis water enter after through ozonization system 67 reuse water basin 69 reuse water.The reclamation rate of sewage is 80%, and the water quality situation of reuse water is as shown in table 5.
The operational condition of described electric capacity desalting plant 65 is volts DS 110V/m ~ 2 * 10
6V/m.
Above-mentioned ozonization system 67 is sterilizing unit.Certainly, sterilizing unit can be a kind of in electrolysis machine, chlorination system, disinfection by chlorine dioxide device, ozonization system and the uv steriliser.
Step 5, sludge treatment: the mud that biochemical system produces enters sludge treating system, pumps into electrolysis machine 23 electrolysis through one-level sludge pump 22.The operating voltage of described electrolysis machine 23 is 100V, and the voltage of two interpolars is for 2～18V, current density 260mA/cm
2Mud after the electrolysis enters surge tank 24, the free radical that makes electrolysis produce further carries out contact reacts with mud, destroy the structure of mud, crack the microbial cell wall, make mud flco structure change, the microorganism intracellular organic matter flows out, enter water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, and then be back in the biological treating equipment 8 by sump pump 27, be the microorganism recycle, not only can be the microorganism supplementary carbon source, can be improved the efficient of biological treatment of sewage by the microbial metabolism recycling; And can be by the decomposition reaction of microorganism, degraded is by cracking bacteriogenic dissolved matter, thereby reaches the purpose that reduces excess sludge production.Excess sludge then enters belt filter press 29 by secondary sludge pump 26 and gets filtrate and mud cake, and filtrate is back to second pond 10 through pipeline, and mud cake is then transported outward.
Above-mentioned belt filter press 29 is sludge dehydration device.Certainly, sludge dehydration device can be a kind of in vacuum filtering and dewatering device, filter-press dehydration device, centrifugal dehumidifier and the membrane filter appts, described filter-press dehydration device is a kind of in the two of belt filter press, plate-and-frame filter press, described membrane filter appts is a kind of in the two of micro-filtration, ultrafiltration, the membrane module of described micro-filtration is a kind of in the two of ceramic membrane, metallic membrane assembly, and the membrane module of described ultrafiltration is a kind of in the two of ceramic membrane, metallic membrane assembly.
The water quality situation of table 5 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | ≤5 | 5 | Turbidity | NTU | ≤1 |
| 2 | BOD 5 | mg/L | ≤5 | 6 | Colourity | Doubly | ≤2 |
| 3 | SS | mg/L | ≤1 | 7 | pH | — | 7.0 |
| 4 | TN | mg/L | ≤5 | 8 | Specific conductivity | μS/cm | ≤180 |
Embodiment 3
Deep purifying regeneration and the recycle engineering of 10000 ton per day sewage.
The water quality situation of described sewage is as shown in table 6.
The water quality situation of table 6 sewage
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 259 | 5 | Turbidity | NTU | 15 |
| 2 | BOD 5 | mg/L | 99 | 6 | Colourity | Doubly | 80 |
| 3 | SS | mg/L | 300 | 7 | pH | — | 7.7 |
| 4 | NH 3-N | mg/L | 45 | 8 | Specific conductivity | μS/cm | 440 |
Step 1, biochemical treatment: sewage enters biochemical system through Vatch basin 1, pass through the processing of coarse rack 2, lift pump 3, fine fack 4, settling pit 5, one-level distributing well 6, preliminary sedimentation tank 7, biological treating equipment 8, secondary distributing well 9 and second pond 10 successively, make its every index reach three grades of emission standards of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard ", enter the subsequent disposal operation again.
Above-mentioned biological treating equipment 8 is the combination of anaerobic pond and biological contact oxidation pond.Certainly, biological treating equipment can be one or more combination of anaerobic pond, anoxic pond, aeration tank, oxidation ditch, sequencing batch reactor (SBR), biological filter, blodisc and biological contact oxidation pond.
Step 2, electrolysis: starting working shaft 32, sewage enters electrolysis machine 33 through stopping valve 31 and carries out electrolysis.The operating voltage of described electrolysis is 220V, and the voltage of two interpolars is 2～18V, current density 15mA/cm
2
Step 3, MBR system filtration are separated: enter in the MBR reaction tank 46 after purifying waste water again after the electrolysis removes by filter the solid impurity, colloid of the larger particles that produces because of electrolysis in the sewage through grid 41, start gas blower 44 and aerator 45, after the oxidation of sewage process aeration, start and water pump 48, under suction function, water molecules sees through MBR membrane module 43 to be separated, and gets dialysis water, and dialysis water is collected in the elementary reuse water basin 49.
The mould material of described MBR system is polyvinylidene difluoride (PVDF) (PVDF) hollow-fibre membrane in 0.2 micron in aperture.The operating pressure that the MBR system separates is-1～-50 kPa, and working temperature is 5～45 ℃, and the pH value is 1～14.
Step 4, electric capacity desalination and sterilization: will pump into electric capacity desalting plant 65 through stopping valve 61, lift pump 62, security personnel's strainer 63, working shaft 64 successively through the elementary reuse water of MBR system filtration gained, desalination separate dialysis water and condensed water, dialysis water enter after through disinfection by chlorine dioxide device 67 reuse water basin 69 reuse water.The reclamation rate of sewage is 74%, and the water quality situation of reuse water is as shown in table 7.
The operational condition of described electric capacity desalting plant 65 is volts DS 110V/m ~ 2 * 10
6V/m.
Above-mentioned disinfection by chlorine dioxide device 67 is sterilizing unit.Certainly, sterilizing unit can be a kind of in electrolysis machine, chlorination system, disinfection by chlorine dioxide device, ozonization system and the uv steriliser.
Step 5, sludge treatment: the mud that biochemical system produces enters sludge treating system, pumps into electrolysis machine 23 electrolysis through one-level sludge pump 22.The operating voltage of described electrolysis machine 23 is 220V, and the voltage of two interpolars is for 2～18V, current density 15mA/cm
2Mud after the electrolysis enters surge tank 24, the free radical that makes electrolysis produce further carries out contact reacts with mud, destroy the structure of mud, crack the microbial cell wall, make mud flco structure change, the microorganism intracellular organic matter flows out, enter water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, and then be back in the biological treating equipment 8 by sump pump 27, be the microorganism recycle, not only can be the microorganism supplementary carbon source, can be improved the efficient of biological treatment of sewage by the microbial metabolism recycling; And can be by the decomposition reaction of microorganism, degraded is by cracking bacteriogenic dissolved matter, thereby reaches the purpose that reduces excess sludge production.Excess sludge then enters ultrafiltration membrane filter device 29 by secondary sludge pump 26 and gets filtrate and mud cake, and filtrate is back to second pond 10 through pipeline, and mud cake is then transported outward.The membrane module of described ultrafiltration is the metallic membrane assembly.
Above-mentioned ultrafiltration membrane filter device 29 is sludge dehydration device.Certainly, sludge dehydration device can be a kind of in vacuum filtering and dewatering device, filter-press dehydration device, centrifugal dehumidifier and the membrane filter appts, described filter-press dehydration device is a kind of in the two of belt filter press, plate-and-frame filter press, described membrane filter appts is a kind of in the two of micro-filtration, ultrafiltration, the membrane module of described micro-filtration is a kind of in the two of ceramic membrane, metallic membrane assembly, and the membrane module of described ultrafiltration is a kind of in the two of ceramic membrane, metallic membrane assembly.
The water quality situation of table 7 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | ≤5 | 5 | Turbidity | NTU | ≤1 |
| 2 | BOD 5 | mg/L | ≤5 | 6 | Colourity | Doubly | ≤2 |
| 3 | SS | mg/L | ≤1 | 7 | pH | — | 7.1 |
| 4 | TN | mg/L | ≤5 | 8 | Specific conductivity | μS/cm | ≤172 |
Claims (13)
1. a sewage disposal and recycling utilization device is characterized in that being provided with biochemical system, electrolytic system, MBR system and advanced treatment system;
Described biochemical system is used for that sewage is carried out biochemical treatment and obtains bio-chemical effluent, and biochemical system is provided with Vatch basin, coarse rack, lift pump, fine fack, settling pit, one-level distributing well, preliminary sedimentation tank, biological treating equipment, secondary distributing well, second pond and sludge reflux pump; The import of Vatch basin connects with outfall by pipeline, the outlet of Vatch basin connects the import of coarse rack, the outlet of coarse rack connects the import of lift pump, promote the import that pump outlet connects fine fack, the outlet of fine fack connects the import of settling pit, the outlet of settling pit connects the import of one-level distributing well, the outlet of one-level distributing well connects the import of preliminary sedimentation tank, the deliver a child import of thing treatment facility of the outlet of preliminary sedimentation tank, the outlet of biological treating equipment connects the import of secondary distributing well, the outlet of secondary distributing well connects the import of second pond, the water outlet of second pond connects with the import of electrolytic system, the sludge outlet of second pond then one the tunnel connects with the import of biological treating equipment through sludge reflux pump, and another road connects with the import of sludge treating system;
Described biochemical system also comprises a sludge treating system, sludge treating system is used for the mud that biochemical system produces is carried out recycling utilization, and sludge treating system is provided with stopping valve, one-level sludge pump, electrolysis machine, surge tank, secondary sludge pump, sump pump and sludge dehydration device; The import of stopping valve connects by the sludge outlet that pipeline connects second pond, the outlet of stopping valve connects the import of one-level sludge pump, one-level mud pump outlet connects the import of electrolysis machine, the outlet of electrolysis machine connects the import of surge tank, the water outlet of surge tank is through the deliver a child water-in of thing treatment facility of sump pump, the sludge outlet of surge tank then connects the import of sludge dehydration device through the secondary sludge pump, the filtrate outlet of sludge dehydration device connects with the water-in of second pond by pipeline, and sludge dehydration device is handled the mud cake of gained and then transported outward;
Described electrolytic system is used for the biochemical treatment sewage effluent is carried out electrolysis treatment, and electrolytic system is provided with stopping valve, working shaft and electrolysis machine; The external bio-chemical effluent relief outlet of the import of stopping valve, the import of working shaft connects the outlet of stopping valve, and the water supply pump outlet connects the import of electrolysis machine, and the outlet of electrolysis machine connects with the import of MBR system;
Described MBR system is used for the electrolytic system gained purified waste water and is further processed, and the MBR system is provided with stopping valve, grid, MBR reaction tank, MBR membrane module, gas blower, aerator, residual sea water pump, goes out water pump, elementary reuse water basin and MBR cleaning system; The import of described stopping valve connects the outlet of the electrolysis machine of electrolytic system, the import of stopping valve outlet adapting grille, the outlet of grid connects the import of MBR reaction tank, the MBR membrane module is immersed in the MBR reaction tank, aerator by gas blower and distribution carries out aeration to it, the filtrate outlet of MBR reaction tank picks out the import of water pump, the water outlet pump outlet connects the import of elementary reuse water basin, the sludge outlet of MBR reaction tank connects the import of residual sea water pump, and mud is pumped to sludge treating system through residual sea water pump and handles;
Described advanced treatment system is used for the elementary reuse water of MBR system handles gained is carried out electric capacity absorption desalination, separation, must dialyse water and condensed water, dialysis water further obtains reuse water by sterilization, and advanced treatment system is provided with stopping valve, lift pump, security personnel's strainer, working shaft, electric capacity desalting plant, sterilizing unit, reuse water basin and condensed water topping-up pump; The import of described stopping valve connects the outlet of MBR system primary reuse water basin, the stopping valve outlet connects the import of lift pump, promote the import that pump outlet connects security personnel's strainer, the outlet of security personnel's strainer connects the import of working shaft, the import of working shaft connects the import of electric capacity desalting plant, the dialysis water out of electric capacity desalting plant connects the import of sterilizing unit, and the outlet of sterilizing unit connects the import of reuse water basin; Advanced treatment system with working shaft pumps into electric capacity desalting plant through security personnel behind the strainer with the elementary reuse water of MBR system gained, through the electric capacity desalting plant handle dialysis water and condensed water, dialysis water enters basin and gets reuse water after the sterilizing unit sterilization; Condensed water then refluxes through the condensed water topping-up pump and enters electrolytic purification system and recycle.
2. a kind of sewage disposal as claimed in claim 1 and recycling utilization device is characterized in that described biological treating equipment is one or more combination of anaerobic pond, anoxic pond, aeration tank, oxidation ditch, sequencing batch reactor (SBR), biological filter, blodisc or biological contact oxidation pond.
3. a kind of sewage disposal as claimed in claim 1 and recycling utilization device is characterized in that described electrolysis machine is provided with power supply and electrolyzer; Electrode materials in the described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the nano-catalytic inert material.
4. a kind of sewage disposal as claimed in claim 3 and recycling utilization device, the top layer that it is characterized in that described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
5. a kind of sewage disposal as claimed in claim 1 and recycling utilization device, it is characterized in that described sludge dehydration device is a kind of in vacuum filtering and dewatering device, filter-press dehydration device, centrifugal dehumidifier and the membrane filter appts, described filter-press dehydration device is a kind of in the two of belt filter press, plate-and-frame filter press, and described membrane filter appts is a kind of in the two of micro-filtration, ultrafiltration.
6. a kind of sewage disposal as claimed in claim 5 and recycling utilization device, it is characterized in that: the membrane module of described micro-filtration is a kind of in the two of ceramic membrane, metallic membrane assembly, and the membrane module of described ultrafiltration is a kind of in the two of ceramic membrane, metallic membrane assembly.
7. a kind of sewage disposal as claimed in claim 1 and recycling utilization device is characterized in that described MBR membrane module is selected from a kind of in polyvinylidene difluoride (PVDF) hollow-fibre membrane, polypropylene hollow fiber membrane, ps hollow fiber uf membrane, polyethersulfone, polyacrylonitrile and the PVC hollow fiber membrane.
8. as claim 1 or 7 described a kind of sewage disposal and recycling utilization devices, the membrane pore size that it is characterized in that described MBR membrane module is 0.10～0.2 μ m, operating pressure is-1～-50kPa, working temperature is 5～45 ℃, applicable pH is 1～14.
9. a kind of sewage disposal as claimed in claim 1 and recycling utilization device is characterized in that described MBR cleaning system is used for cleaning the MBR membrane module, and the MBR cleaning system is provided with cleaning fluid tank, backwashing pump and stopping valve; The outlet of cleaning fluid tank connects the import of backwashing pump, and the back flushing pump outlet connects the import of stopping valve, and the outlet of stopping valve meets the MBR system.
10. a kind of sewage disposal as claimed in claim 1 and recycling utilization device is characterized in that described sterilizing unit is a kind of in electrolysis machine, chlorination system, disinfection by chlorine dioxide device, ozonization system and the uv steriliser.
11. a sewage disposal and recycling utilization method is characterized in that, use a kind of sewage disposal and recycling utilization device according to claim 1, said method comprising the steps of:
1) biochemical treatment: sewage enters biochemical system through Vatch basin, by handling grease, scum silica frost, SS, COD and the BOD that reduces in the sewage, make its every index reach three grades of emission standards of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard ", enter the subsequent disposal operation again;
2) electrolysis: bio-chemical effluent after water pump extracts, is carried out electrolysis in the input electrolysis machine;
3) MBR system filtration: will handle purifying waste water of gained through electrolytic system and flow into the MBR system through pipeline, carry out the MBR system handles separate elementary reuse water;
4) electric capacity desalination and sterilization: will pump into the electric capacity desalting plant through working shaft through the elementary reuse water of MBR system filtration gained, desalination separate dialysis water and condensed water, dialysis water gets reuse water through entering basin behind the sterilizing unit;
5) sludge treatment: the mud that biochemical system produces enters sludge treating system, structure through electrolysis and contact reacts destruction mud, crack the microbial cell wall, the microorganism intracellular organic matter flows out, enter water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, and then be back in the biological treating equipment by sump pump, be Institute of Micro-biology's recycle; Excess sludge then enters sludge dehydration device and gets filtrate and mud cake, and filtrate is back to second pond through pipeline, and mud cake is then transported outward.
12. a kind of sewage disposal as claimed in claim 11 and recycling utilization method, it is characterized in that in step 2) in, the operating voltage of the electrolyzer of described electrolysis is 2～250V, and adjacent two interelectrode voltages are 2～18V, and current density is 3～400mA/cm
2
13. a kind of sewage disposal as claimed in claim 11 and recycling utilization method is characterized in that in step 4), the operational condition of described electric capacity desalination is volts DS 110V/m ~ 2 * 10
6V/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101328067A CN102674628B (en) | 2012-05-03 | 2012-05-03 | Sewage treatment and regeneration cyclic utilization device and sewage treatment and regeneration cyclic utilization method |
| PCT/CN2013/076367 WO2013163963A1 (en) | 2012-05-03 | 2013-05-29 | Device for sewage treatment and regenerative recycling and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101328067A CN102674628B (en) | 2012-05-03 | 2012-05-03 | Sewage treatment and regeneration cyclic utilization device and sewage treatment and regeneration cyclic utilization method |
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| CN102674628A CN102674628A (en) | 2012-09-19 |
| CN102674628B true CN102674628B (en) | 2013-08-28 |
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| WO (1) | WO2013163963A1 (en) |
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| TWI614218B (en) * | 2016-08-30 | 2018-02-11 | Thomas Wang | Ecological biological water purification system |
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