A kind of organic concentration wastewater treatment method of high salinity high rigidity difficult degradation and systemTechnical field
The present invention relates to sewage water treatment method more particularly to a kind of organic concentration wastewater treatments of high salinity high rigidity difficult degradationMethod.The invention further relates to a kind of high organic concentration waste water treatment systems of salinity high rigidity difficult degradation.
Background technology
At present, study both at home and abroad it is more have coking wastewater, pharmacy waste water (including traditional Chinese medicine wastewater), petrochemical industry/oils waste water,The professionals such as Fine Chemistry Wastewater, paint waste water, landfill leachate waste water is past after conventional materialization, biochemical treatment is passed throughToward needing to can be only achieved discharge standard requirement, and nanofiltration, reverse osmosis process after carrying out advanced treating using nanofiltration, reverse osmosis process20~30% concentrate can be generated, is high salinity, high rigidity, difficult degradation organic film concentration waste water.High salinity, high rigidity,Difficult degradation organic film concentration waste water quality has both higher hardness, the organic pollutant of high concentration, the salinity of high concentration, it is difficult toThe features such as biochemical degradation.So-called " high rigidity " refers to that the total hardness of this kind of waste water is higher, generally in more than 2000mg/L；It is " difficultDegradation " refers to that the biodegradability of this kind of waste water is relatively low, BOD5/ COD value is even lower generally below 0.1, it is difficult to biology dropSolution；Such wastewater organic pollutant concentration is higher simultaneously, generally in more than 2000mg/L, some be even as high as every liter it is tens of thousands of to tenTens of thousands of milligrams.Processing for this kind of such waste water of waste water is the problem that sewage disposal circle both at home and abroad is generally acknowledged at present.Locate at this stageManage with high salt, high rigidity, the technique of difficult degradation organic film concentration waste water mainly has advanced oxidation processes, biological treatment and evaporationCrystallization processes.
Advanced oxidation processes are intended to by adding oxidant, by most of larger molecular organics chain rupture, shape in organic wastewaterInto carbon dioxide and water, achieve the purpose that handle organic wastewater.Advanced oxidation processes mainly have photochemical catalytic oxidation, Fenton chemical oxygenChange, ozone, hydrogen peroxide oxidation etc..During day-to-day operation, Fenton chemical oxidation, hydrogen peroxide oxidation need to add a large amount of medicaments,Operating cost is high.Photocatalyst ozone oxidation cost of investment is higher, and power consumption is larger.And oxidation technology to salinity without removalEffect, need to use with other process integrations.
Bioanalysis is mainly anaerobic hydrolysis technique, and the mechanism of action is in hydrolysis (acidifying) stage, profit by anaerobic digestion controlIt is acted on hydrolysed ferment, within a short period of time dissolves the insoluble organic matter in organic wastewater, soluble hardly degraded organic substanceMolecular structure changes, and part cyclic object open loop, macromolecules degradation is small molecule, so as to mitigate the processing load of aerobic section andTo the inhibitory action of aerobic microbiological, COD removal rates are improved.But this method essence or the absorption degradation effect using microorganismHandle pollutant, limitation is larger, when organic matter has hardness, salinity are higher in bio-toxicity and waste water when be easy to cause lifeChange system crash.
Evaporative crystallization technique is to carry out heating evaporation processing to high rigidity organic wastewater with difficult degradation thereby using high-temperature steam, can be incited somebody to actionOrganic wastewater is separated into clear water and organic matter, salinity.But evaporator cost is higher, and needs to consume substantial amounts of heat in the process of runningAmount；Engineering one-time investment and running cost are higher, and ton water process expense is often as high as 50 yuan or more；And with concentration timesSeveral increases, the organic matter and salt of organic wastewater analyze, and form fouling, need to consume substantial amounts of soda acid and be cleaned, to equipmentSeriously corroded；And it is danger wastes that evaporative crystallization, which generates solid, need to be recycled by professional qualification company.Disadvantages mentioned aboveGreatly limit the application range of the technique.
Chinese patent ZL 201210275572.1 discloses a kind of processing method of high rigidity organic wastewater with difficult degradation thereby,Using the organic matter in oil removal precipitation, coagulation air-float, micro-electrolysis reaction, ultraviolet Fenton oxidation process waste water, water outlet intoEnter and handled in Sewage Disposal biochemical system.This method is the combination of light electrolysis+ultraviolet Fenton oxidation, and this method is to havingMachine object oxidation effectiveness is preferable, but micro-electrolysis stuffing is with the growth of run time and the pollution of organic matter, and due to hard in waste waterDegree is higher, and filler is easily hardened dirty stifled；Ultraviolet Fenton process sections dosage is larger, and generates substantial amounts of sludge, need to carry out twoSecondary disposal.
103626314 A of Chinese patent application CN disclose a kind of high rigidity organic wastewater with difficult degradation thereby-landfill leachate thickContracting liquor treating process uses two-stage material membranous system to carry out concentrating and separating to landfill leachate nanofiltration concentrate.The technique according toPurely physical separation is carried out by membranous system, simply merely pollutant is transferred in dope.And due to one section of concentration, two sectionsMembranous system operating pressure is higher, and operating cost is larger.Further, since the limitation of nanofiltration membrane aperture, two-stage film process can only separatePart divalent ion to monovalent salt substantially without centrifugation, is unfavorable for the stable operation of system.
The content of the invention
An object of the present invention is to provide a kind of organic concentration wastewater treatment method of high salinity high rigidity difficult degradation, fullOn the premise of sufficient Sewage Disposal monolithic stability operation, by preconditioned, the fouling factor concentration in waste water is reduced, is then enteredThe organic matter in organic concentration waste water is separated using UF membrane mode, finally into horizontal high voltage reverse-osmosis treated, to monovalenceSalt, remaining organic and inorganic pollution are separated, and make the final qualified discharge of water outlet.
The second object of the present invention is to provide the system for realizing the above method.
An object of the present invention is to be achieved through the following technical solutions：A kind of high salinity high rigidity difficult degradation is organic denseContracting wastewater treatment method, comprises the following steps：
(1) preconditioned：Organic concentration waste water is passed through preconditioned device and carries out water quality adjustment, adjusting pH is 6-8, Ran HoutianAdd conditioning medicament, staticly settle, the foulings factor such as calcium, magnesium and silicon ion in removing waste water；
(2) UF membrane：Through step (1), treated that organic concentration waste water enters that separation membrane device carries out membrane separation,It is filtered under the pressure of 6-15bar, separates organic pollution and water, water enters through seperation film to be handled in next step；
(3) high pressure is reverse osmosis：The water that membrane separation comes out enters high pressure reverse osmosis unit into horizontal high voltage reverse-osmosis treated,Monovalent salt and contaminant remaining in water removal are gone, makes water outlet qualified discharge and reuse.
Organic concentration waste water of the present invention includes machine film concentration waste water, such as nanofiltration concentrate, landfill leachate thickContracting liquid etc..
In the step (1), pH adjustings are carried out to organic concentration waste water using hydrochloric acid, sodium hydroxide and lime etc.；InstituteStating conditioning medicament mainly has more than one or both of sodium hydroxide, sodium carbonate, lime and calcium carbonate etc. combination；Nurse one's health medicineCalcium, magnesium and silicon ion of the specific dosage of ratio and conditioning medicament in agent between each component in organic concentration waste waterConcentration carries out calculating adjustment.
In the step (2), preferably use can separate organic matter of the molecular weight more than 500 dalton in separation membrane deviceSeparating film module.
In the step (3), the high pressure reverse osmosis membrane assembly of high pressure reverse osmosis unit uses network pipe type and superposed pipe film groupPart, water inlet pH value are adjusted to 6~8 or so, and operating pressure is between 60~90bar.
Present invention additionally comprises the high pressure reverse osmosis membrane groups of the separating film module to separation membrane device and high pressure reverse osmosis unitPart carries out cleaning step, when separating film module and high pressure reverse osmosis membrane assembly processing capacity decline, has for pollutant typeThe corresponding cleaning agents of membrane of use of selectivity carries out cleaning recovery to membrane component.When the pollution factor for influencing film properties is dirty for microorganismDuring dye, the cleaning agents of membrane main component used is combination more than one or both of alkali, dodecyl sodium sulfate salt etc.；WhenInfluence film properties pollution factor for inorganic scaling because of the period of the day from 11 p.m. to 1 a.m, the cleaning agents of membrane main component used is oxalic acid, citric acid, hydrochloric acidWith combination more than one or both of bisulfite amine etc..
The object of the invention second is that being achieved through the following technical solutions：A kind of high organic concentration of salinity high rigidity difficult degradationWaste water treatment system, including along the sequentially connected preconditioned device of organic concentration wastewater treatment process, separation membrane device and high pressureReverse osmosis unit, the separation membrane device include at least level-one separation membrane element, and separation membrane elements at different levels are included along organic concentrationThe sequentially connected seperation film high-pressure pump of wastewater treatment process and separating film module combination, the water inlet end of the seperation film high-pressure pump withPreconditioned device water outlet connects；It is anti-that the high pressure reverse osmosis unit includes at least level-one high pressure reverse osmosis units, high pressures at different levelsPermeation unit is included along the sequentially connected high pressure reverse osmosis high-pressure pump of organic concentration wastewater treatment process and high pressure reverse osmosis membrane groupPart combines, the water outlet connection that the high pressure reverse osmosis high-pressure pump water inlet end is combined with separating film module.Organic concentration waste water existsAddition conditioning medicament is nursed one's health water quality and is stood in preconditioned device, does not dissolve in the calcium in waste water, magnesium and silicon ion reaction generationThe substance and precipitation of water, afterwards organic concentration waste water sequentially enter separation membrane device and high pressure reverse osmosis unit carry out UF membrane andHigh pressure reverse-osmosis treated, so as to qualified discharge or reuse.
The separating film module combination includes n sections of separating film modules, and n >=1 is cycled per being equipped between two-phase seperation membrane modulePump, by increasing surface cross-flow velocity, to reduce film and block risk by dirt.The separating film module optionally separates pointSon amount is organic matter more than 500 dalton.
The separation membrane device, which further includes, is arranged on being sequentially connected between preconditioned device and first order separation membrane elementSeperation film intake pump and seperation film accurate filter, seperation film intake pump water inlet end be connected with the water outlet of preconditioned device,And the water outlet of seperation film accurate filter is connected with first order separation membrane element water inlet end, from the organic dense of preconditioned deviceContracting waste water sequentially enters separation membrane elements at different levels and is handled again after first passing through the filtering of seperation film accurate filter.
The separation membrane element at different levels further includes the organic liquid waste for the water outlet connection that influent side is combined with separating film moduleTank, for storing the concentrate generated after UF membrane.
The separation membrane element at different levels further includes seperation film cleaning device, for when separating film module processing capacity declinesCleaning recovery is carried out, including sequentially connected cleaning agent storage tank, flushing water pump and cleaning agent filter, cleaning agent filterWater outlet is connected with separating film module water inlet end.
The high pressure reverse osmosis membrane assembly combination is made of n sections of high pressure reverse osmosis membrane assemblies, n >=1.High pressure reverse osmosis membrane groupPart uses network pipe type and superposed pipe membrane module.
The high pressure reverse osmosis unit, which further includes, to be arranged between separation membrane device and first order high pressure reverse osmosis unitsSequentially connected booster and the reverse osmosis accurate filter of high pressure, the water inlet end of booster are connected with separation membrane device water outlet,The water outlet of the reverse osmosis accurate filter of high pressure is connected with first order high pressure reverse osmosis units water inlet end, from separation membrane deviceWaste water first passes through booster boosting, is filtered subsequently into the reverse osmosis accurate filter of high pressure, then sequentially enters high pressure reverse osmosis at different levelsSaturating unit is handled.
The high pressure reverse osmosis units at different levels further include the water outlet connection that influent side is combined with high pressure reverse osmosis membrane assemblyConcentration liquid storage tank, for store high pressure it is reverse osmosis after generate concentrate.
The high pressure reverse osmosis units at different levels further include the reverse osmosis cleaning device of high pressure, in high pressure reverse osmosis membrane assemblyProcessing capacity carries out cleaning recovery when declining, including sequentially connected cleaning agent storage tank, flushing water pump and cleaning agent filter,The water outlet of cleaning agent filter is connected with high pressure reverse osmosis membrane assembly water inlet end.
The preconditioned device includes at least a set of conditioning medicine feeding apparatus, pretreatment pool and reaction settling basin, conditioningMedicine feeding apparatus and pretreatment pool, pretreatment pool are connected with reaction settling basin, and at least one set of blender is equipped in pretreatment pool.
Present invention additionally comprises the raw water tank being connected with Sewage outlet, the raw water tank water outlet through raw water intake pump with it is presettingManage device connection.
Present invention additionally comprises and the water tank that is arranged between separation membrane device and high pressure reverse osmosis unit, for keeping inWaste water from separation membrane device.
The present invention has the following advantages：
1. method and system leading portion provided by the invention by preconditioned remove foulings such as calcium, magnesium and silicon in permeate fromSon effectively protects the stability of total system operation；Stage casing is dense to high salinity, high rigidity, difficult degradation organic film using UF membraneOrganic matter in contracting waste water is separated, and the organic liquid waste after concentration can be down to less than the 5% of stoste；Latter end uses high pressure reverse osmosisRow advanced treating is penetrated into, since larger molecular organics and scale-forming ion have removed in preconditioned and UF membrane, can substantially be carriedThe rate of recovery of high pressure reverse osmosis units, high pressure reverse osmosis water outlet can directly qualified discharge or reuses.
2. method provided by the invention removes calcium, magnesium and silicon plasma, reduces organic thickened waste in preconditioned processingThe hardness of water avoids separating film module and high pressure reverse osmosis membrane assembly in follow-up UF membrane and high pressure reverse-osmosis treated from being blocked,Follow-up fouling membrane is effectively controlled, improves the separating effect of organic matter, reduces the operation and maintenance cost of subsequent technique, ensures subsequent filmThe stable operation of system, the more conventional treatment process of total system operating cost are greatly lowered, and 1 ton of cost of water treatment is can be controlled inLess than 18 yuan, and the stability of system and longtime running feasibility are higher.
3. the present invention first carries out organic concentration waste water preconditioned, effectively control fouling membrane and improve the separation effect of organic matterFruit makes the organic liquid waste after membrane separation concentration be down to less than the 5%, even up to less than 2% of original machine concentration waste water, producing water ratioUp to more than 98%, the organic concentration in permeate reduces by more than 70%, while ensures the stable operation of follow-up membranous system.
4. the present invention after preconditioned and membrane separation due to waste water in influence membranous system stable operation factor it is basicIt has all removed, for the reverse osmosis producing water ratio of high pressure up to 80%~85%, water outlet can qualified discharge or reuse.
5. the present invention is when separating film module and high pressure reverse osmosis membrane assembly processing capacity decline, to separating film module and heightPressure reverse osmosis membrane assembly carries out cleaning recovery, to ensure the stability of the processing capacity of system and operation.
6. the separating film module that the present invention selects optionally separates molecular weight as organic matters more than 500 dalton,The organic pollution of organic concentration waste water is separated, reduces follow-up high pressure reverse osmosis membrane assembly fouling risk.
7. the present invention concentrates waste water, such as the treatment effect of nanofiltration concentrate, landfill leachate concentration liquid for organic filmHighly significant.
Description of the drawings
Fig. 1 is the processing system schematic diagram of the present invention；
1. raw water tank, 2. raw water pumps, 3. reaction settling basins, 4. seperation film intake pumps, 5. seperation film accurate filters, 6. pointsFrom film high-pressure pump, the combination of 7. separating film modules, 8. water tanks, 9. boosters, the reverse osmosis accurate filter of 10. high pressures, 11. high pressuresReverse osmosis high-pressure pumps, the combination of 12. high pressure reverse osmosis membrane assemblies, 13~15. conditioning medicine feeding apparatus, 16. cleaning agent storage tanks,17. flushing water pump, 18. cleaning agent filters, 19. organic waste flow containers, 20. cleaning agent storage tanks, 21. flushing water pumps, 22. cleaning agentsFilter, 23. concentration liquid storage tanks, 31. pretreatment pools, 32. blenders.
Fig. 2 is the process flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail technical scheme, but does not formAny limitation of the invention.As described below is only present pre-ferred embodiments, all institutes in spirit of the invention and spiritAny modification equivalent substitution made, should all be included in the protection scope of the present invention.
Embodiment 1
The organic concentration waste water treatment system of high salinity high rigidity difficult degradation as shown in Figure 1 is one embodiment of the invention,By raw water tank 1, raw water intake pump 2, preconditioned device, separation membrane device, water tank 8 and high pressure reverse osmosis unit along organic concentrationWastewater treatment process is sequentially connected composition.
Preconditioned device includes three sets of conditioning medicine feeding apparatus 13,14,15, pretreatment pool 31 and reaction settling basin 3, in advanceProcessing pond 31 is connected with reaction settling basin 3, and three groups of blenders 32 are equipped in pretreatment pool 31.Nurse one's health medicine feeding apparatus 13,14,15 are connected with pretreatment pool 31.In wastewater treatment process, the conditioning waste water into pond of medicine feeding apparatus 13,14,15 adds tuneManage medicament, while three groups of blenders 32 start by waste water with conditioning medicament be uniformly mixed, after pretreatment waste water enter reaction precipitatePrecipitation is reacted in pond 3.
Separation membrane device includes seperation film intake pump 4, seperation film accurate filter 5, single-stage separation membrane element, organic liquid wasteTank 19 and seperation film cleaning device.Single-stage separation membrane element includes seperation film high-pressure pump 6 and separating film module combination 7.Seperation filmIntake pump 4, seperation film accurate filter 5, seperation film high-pressure pump 6 and separating film module combination 7 are sequentially connected.Wherein, seperation film4 water inlet end of intake pump is connected with the water outlet of reaction settling basin 3, the water outlet and water storage through side of separating film module combination 7Tank 8 connects, and the water outlet that separating film module combines 7 influent sides is connected with organic waste flow container 19, from having for preconditioned deviceMachine concentration waste water, which is first passed through after seperation film accurate filter 5 filters, to be entered back into separation membrane element and is handled, generation it is organic denseContracting waste liquid is left concentratedly in organic waste flow container 19, and the water through UF membrane enters water tank 8 and stores.In the present embodiment, seperation filmThe membrane module of organic matter of the component combination 7 by n sections of separation molecular weight more than 500 dalton is formed, n >=1.Every two sections of membrane modulesBetween be equipped with circulating pump, can be reduced film by increasing surface cross-flow velocity and risk blocked by dirt in processing procedure.SeparationMembrane cleaning device includes sequentially connected cleaning agent storage tank 16, flushing water pump 17 and cleaning agent filter 18, cleaning agent filter18 water outlet combines the connection of 7 water inlet ends with separating film module, when separating film module combines 7 processing capacities and declines, toward separationMembrane module combination 7 is passed through cleaning agent and is cleaned, to recover processing capacity.
High pressure reverse osmosis unit include booster 9, the reverse osmosis accurate filter 10 of high pressure, single-stage high voltage reverse osmosis units,Concentrate liquid storage tank 23 and the reverse osmosis cleaning device of high pressure.Single-stage high voltage reverse osmosis units include the reverse osmosis height of sequentially connected high pressurePress pump 11 and high pressure reverse osmosis membrane assembly combination 12.The reverse osmosis accurate filter 10 of booster 9, high pressure, high pressure reverse osmosis high-pressurePump 11 and high pressure reverse osmosis membrane assembly combination 12 are sequentially connected, wherein, the water inlet end of booster 9 is connected with 8 water outlet of water tank,The water outlet that high pressure reverse osmosis membrane assembly combines 12 influent sides is connected with concentration liquid storage tank 23, and the waste water from water tank 8 first passes throughIt crosses after booster 9 boosts and is filtered into the reverse osmosis accurate filter 10 of high pressure, enter back into high pressure reverse osmosis units and handled, it is highThe concentrate of pressure reverse osmosis membrane assembly 12 influent sides of combination enters concentration liquid storage tank 23 and stores, high pressure reverse osmosis membrane assembly combination 12Through side water through water outlet discharge or reuse.In the present embodiment, the combination 12 of high pressure reverse osmosis membrane assembly is by n sections of high pressure reverse osmosisPermeable membrane component is formed, n >=1.High pressure reverse osmosis membrane assembly uses network pipe type and superposed pipe membrane module.The reverse osmosis cleaning device of high pressureIncluding sequentially connected cleaning agent storage tank 20, flushing water pump 21 and cleaning agent filter 22, the water outlet of cleaning agent filter 22The connection of 12 water inlet ends is combined with high pressure reverse osmosis membrane assembly.It is past when high pressure reverse osmosis membrane assembly combines 12 processing capacities and declinesHigh pressure reverse osmosis membrane assembly combination 12 is passed through cleaning agent and is cleaned, to recover processing capacity.
In the present embodiment, cleaning agent filter 18 and cleaning agent filter 22 use accurate filter.
Embodiment two
(1) preconditioned：Organic film concentration waste water-nanofiltration concentrate in raw water tank 1 is passed through preconditioned device and carries out waterMatter is adjusted.The property of waste water is concentrated according to organic film, the pH of organic film concentration waste water is adjusted using hydrochloric acid, sodium hydroxide and limeIt is worth for 6.Then addition conditioning medicament stands reaction precipitation, removes calcium, magnesium and the silicon ion in waste water, total hardness is down to originalLess than the 15% of water.Conditioning medicament is made of sodium hydroxide, sodium carbonate and lime, between sodium hydroxide, sodium carbonate and limeThe specific dosage of ratio and conditioning medicament carries out calculating adjustment depending on calcium, magnesium and the silicon plasma concentration in waste water.
(2) UF membrane：Through step (1) treated organic film concentration waste water after the filtering of seperation film accurate filter 5Into separation membrane element, under the pressure of 6bar filtering separate organic pollution and waste water, producing water ratio is up to more than 98%, and waterIn organic matter concentrating and separating be reduced to less than the 30% of stoste, waste water is through separating film module combination 7 into water tanks 18Storage, to be further processed.
(3) high pressure is reverse osmosis：After boosted 9 boosting of pump of waste water of water tank 18, high pressure reverse osmosis units are entered back into,Reverse osmosis into horizontal high voltage under 90bar pressure, water outlet meets qualified discharge and reuse standard.
(4) clean：When separating film module combination 7 and high pressure reverse osmosis membrane assembly are combined 12 processing capacities and are declined, forPollutant type is selectively using compound cleaning agents of membrane to separating film module combination 7 and high pressure reverse osmosis membrane assembly combination 12Carry out cleaning recovery.Specifically, when the pollution factor for influencing film properties is microbial contamination, compound cleaning agents of membrane main componentFor alkali, dodecyl sodium sulfate salt etc.；When influence film properties pollution factor for inorganic scaling because of the period of the day from 11 p.m. to 1 a.m, compound cleaning agents of membrane masterIngredient is wanted as oxalic acid, citric acid, hydrochloric acid, bisulfite amine etc..Each group distribution ratio is according to pollutant component in compound cleaning agents of membraneConcentration carries out calculating adjustment.
(5) the conditioning sludge that preconditioned generates carries out Treatment of Sludge in sewage plant.Organic-condensed wastewater after UF membraneDisposal is then transported outward with concentrate of the high pressure after reverse osmosis.
Embodiment three
(1) preconditioned：Organic film concentration waste water in raw water tank 1-landfill leachate concentration liquid is passed through preconditioned deviceWater quality adjustment is carried out, the property of waste water is concentrated according to organic film, organic film thickened waste is adjusted using hydrochloric acid, sodium hydroxide and limeThe pH value of water is 6.Then addition conditioning medicament stands reaction precipitation, calcium, magnesium and the silicon ion in waste water is removed, by total hardnessIt is down to less than the 15% of raw water.Conditioning medicament is made of sodium hydroxide, sodium carbonate, lime and calcium carbonate, sodium hydroxide, sodium carbonateThe specific dosage of ratio and conditioning medicament between lime carries out calculating adjustment depending on the calcium ions and magnesium ions concentration in waste water.
(2) UF membrane：Through step (1) treated organic film concentration waste water after the filtering of seperation film accurate filter 5Into separation membrane element, being filtered under the pressure of 10bar separates organic pollution and waste water, and waste water penetrates separating film module group7 are closed, is stored into water tank 18, to be further processed.
(3) high pressure is reverse osmosis：After boosted 9 boosting of pump of waste water of water tank 18, high pressure reverse osmosis units are entered back into,Reverse osmosis into horizontal high voltage under the pressure of 80bar, water outlet meets qualified discharge and reuse standard.
(4) clean：When separating film module combination 7 and high pressure reverse osmosis membrane assembly are combined 12 processing capacities and are declined, forPollutant type is selectively using specific complex cleaning agents of membrane to separating film module combination 7 and high pressure reverse osmosis membrane assembly groupIt closes 12 and carries out cleaning recovery.Specifically, when the pollution factor for influencing film properties is microbial contamination, compound cleaning agents of membrane is mainIngredient is alkali, dodecyl sodium sulfate salt etc.；When influence film properties pollution factor for inorganic scaling because of the period of the day from 11 p.m. to 1 a.m, compound Membrane cleaningAgent main component is oxalic acid, citric acid, hydrochloric acid, bisulfite amine etc..Each group distribution ratio is according to pollutant in compound cleaning agents of membraneConstituent concentration carries out calculating adjustment.
(5) the conditioning sludge that preconditioned generates carries out Treatment of Sludge in sewage plant.Organic-condensed wastewater after UF membraneDisposal is then transported outward with concentrate of the high pressure after reverse osmosis.
Example IV
(1) preconditioned：Organic concentration waste water in raw water tank 1 is passed through preconditioned device and carries out water quality adjustment, according to havingMachine concentrates the property of waste water, and hydrochloric acid, sodium hydroxide and lime is used to adjust the pH value of organic concentration waste water as 6.Then addition is adjustedMedicament is managed, reaction precipitation is stood, removes calcium, magnesium and the silicon ion in waste water, total hardness is down to less than the 15% of raw water.ConditioningMedicament is made of sodium hydroxide, sodium carbonate, lime and calcium carbonate, ratio and tune between sodium hydroxide, sodium carbonate and limeThe specific dosage of reason medicament carries out calculating adjustment depending on the calcium ions and magnesium ions concentration in waste water.
(2) UF membrane：It is filtered through step (1) treated organic concentration waste water by seperation film accurate filter 5 laggardEnter separation membrane element, being filtered under the pressure of 15bar separates organic pollution and waste water, and waste water is combined through separating film module7, it is stored into water tank 18, to be further processed.
(3) high pressure is reverse osmosis：After boosted 9 boosting of pump of waste water of water tank 18, high pressure reverse osmosis units are entered back into,Reverse osmosis into horizontal high voltage under 60bar pressure, water outlet meets qualified discharge and reuse standard.
(4) clean：When separating film module combination 7 and high pressure reverse osmosis membrane assembly are combined 12 processing capacities and are declined, forPollutant type is selectively using specific complex cleaning agents of membrane to separating film module combination 7 and high pressure reverse osmosis membrane assembly groupIt closes 12 and carries out cleaning recovery.When the pollution factor for influencing film properties is microbial contamination, compound cleaning agents of membrane main component isAlkali, dodecyl sodium sulfate salt etc.；When the pollution factor for influencing film properties is inorganic scaling because of the period of the day from 11 p.m. to 1 a.m, compound cleaning agents of membrane is mainIngredient is oxalic acid, citric acid, hydrochloric acid, bisulfite amine etc..Each group distribution ratio is dense according to pollutant component in compound cleaning agents of membraneDegree carries out calculating adjustment.
(5) the conditioning sludge that preconditioned generates carries out Treatment of Sludge in sewage plant.Organic-condensed wastewater after UF membraneDisposal is then transported outward with concentrate of the high pressure after reverse osmosis.