CN101033107A - Separator and immersion membrane bioreactor combined water purifying device and system - Google Patents
Separator and immersion membrane bioreactor combined water purifying device and system Download PDFInfo
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- CN101033107A CN101033107A CN 200710056769 CN200710056769A CN101033107A CN 101033107 A CN101033107 A CN 101033107A CN 200710056769 CN200710056769 CN 200710056769 CN 200710056769 A CN200710056769 A CN 200710056769A CN 101033107 A CN101033107 A CN 101033107A
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Abstract
This invention relates to a clean water device and a system including an immerged film bio-reactor, water, an aeration system, a separator, a technics flow and pipelines, a water safeguarding system, a chemical flush system and a program control system, in which, at least a separator is connected between an original pump of an adjusting basin and the original pipe of the reaction basin of the immerged film bio-reactor, which is suitable for poor water quality with many combos of oil and waste-soap solution with humanbody fat in particular and increases the ability of anti-pollution of the immerged hollow fiber film bio-reactor, and this filter separator can be taken as a generator for collecting and growing biochemical films.
Description
Technical field
The present invention relates to the purifier and the system of the combination of a kind of separator and immersion membrane bioreactor, can be used for sanitary sewage disposal, particularly food and drink is abandoned water, shower draining and is contained the processing that the silt particle draining accounts for the sewage of larger proportion towards car, belongs to the environmental protection field.
Background technology
It is little that immerseable hollow-fiber membrane bioreactor (be called for short MBR membrane bioreactor) has a volume as the integral water purifying device of the water body of handling sanitary sewage, the efficient height, effluent characteristics is stable, contain the characteristics that low and all the other indexs of bacterial count directly reach the reuse water standard of China national, it is very big that but the purifier of prior art is used to handle the water quality difference of sanitary sewage, abandon water for food and drink, shower draining and contain the sewage that the silt particle draining accounts for larger proportion towards car, because oil-containing or useless soap lye and body fat binding substances or silt particle are more in this water quality, can biochemical decompose organic less, general anerobe or aerobic bacteria are difficult to adapt to, and pollutants in sewage can not be quick, effectively utilize the digestion of anerobe or aerobic bacteria; And the hole of hollow-fibre membrane is generally at 0.02 μ m, oily and useless soap lye and body fat binding substances are easy to make hole result in blockage (film pollution), often can not adopt general gas, water recoil or air water to unite recoil to the hollow-fiber membrane bioreactor that the film pollution takes place and just can solve, the flushing of general now employing chemical process solves.After the serious decline of the strainability of film, the present restoration methods first is with former water emptying in the water body, manually the immerseable hollow-fibre membrane is pulled down from pipeline, be put into the clean container rinsing, time-consuming, the effort of each rinsing membrane module is easy to cause the damage of hollow-fibre membrane, owing to have peculiar smell, on-the-spot muddy, workman's operational condition is very poor; Or charge into chemical cleaning solution from film silk inside, cleaning the back all bleeds off the water body in the water body, each rinsing membrane module waste great lot of water resources, this situation has significantly reduced the product water efficient of membrane bioreactor, also have a strong impact on the work-ing life of MBR membrane bioreactor, improved running cost.In addition, many users since the foundation of civil work height restriction, the MBR membrane bioreactor that needs more shallow submergence height, this just arranges dead mud to the bottom, flat pond of the reaction tank of MBR membrane bioreactor and brings difficulty, will have a strong impact on the product quality if can not get rid of dead mud for a long time.Also having a key issue is to reduce current consumption, reduces project total cost and improves the problem of automatization level, all requires further improvement and improves.
We are in the public technology data of existing purifier, still after not finding that technical conceive according to the innovation utilizes filtrate separator or dissolved air flotation device or inclined tube separator to remove solid substance in sewage, utilize the MBR membrane bioreactor to remove the technology report of organic purifier and system again.
Summary of the invention
The present invention abandons water for solving for food and drink, and the sewage disposal immersion membrane bioreactor that the shower draining accounts for larger proportion is difficult to utilize the problem of bacterial digestion, the purifier and the system that provide separator and immersion membrane bioreactor to make up.
The present invention seeks to satisfying under less energy-consumption, low investment, the high efficiency prerequisite, proposition utilizes separator to carry out physical sepn and utilizes the technical scheme that the MBR membrane bioreactor is biochemical and filter the purifier of combination again, as the further selection of such purifier.
The MBR membrane bioreactor that in Figure 11,15 and 16, has shown a kind of purifier that has sold in two kinds of markets; This MBR membrane bioreactor is to adopt the vertical hollow fiber film assembly that uses of film tow to constitute.Each reactor is made of two hollow fiber film assemblies in Figure 11, and four reactors are arranged in Figure 15 and 16, and four reactors are placed on respectively in two reaction tanks; Each reactor is made of 16 hollow fiber film assemblies, more hollow fiber film assemblies or reactor can also be adopted formation in the same way, and the reactor of multiple pattern describes in detail sees following examples.The membrane module that the MBR membrane bioreactor also can adopt film tow level to use, the preferred version of the reactor of the hollow fiber film assembly that level is used are seen my patent application " immerseable hollow fiber film assembly and hollow fiber film assembly unit thereof " Chinese patent application numbers 200610065807.9; The sheet curtain formula that also has reactor immerses membrane module or post curtain formula immerses membrane module or several forms of pipe curtain formula immersion membrane module are available, and these all are prior arts.
The purifier of separator and immersion membrane bioreactor combination and system realize with following technical scheme 1: purifier and system comprise MBR membrane bioreactor, Yuan Shui, aerating system, separator, process system flow process and pipeline, water body containment system, chemical rinse-system and sequence control system; This purifier is provided with at least a pair of (A and B) MBR membrane bioreactor, every pair of MBR membrane bioreactor comprises at least one immerseable hollow fiber film assembly; Each MBR membrane bioreactor is immersed in the reaction tank of water body containment system formation, the casing of reaction tank for opening wide; Sanitary sewage enters the equalizing tank of purifier, and connecting between the raw water tubes of the raw water pump of equalizing tank and reaction tank is communicated with at least one separator; One of them separator adopts the filtrate separator, and the filtrate separator comprises casing, grills, raw water tubes, emptying water pipe, row's recoil water pipe, recoil tracheae and the filter material layer of sealing; Filtrate separator bottom is provided with permeable hole and can stops the grills that the filtrate of larger particles degree does not run off, and the filtrate of absorption is filled on grills top, and this filtrate is filled 30%～70% of filtrate separator internal box volume total height; A port of raw water tubes enters the equal stringing of former water on the top of filtrate separator internal adsorption filtrate, the equal stringing of this former water is arranged on the upper surface of a little higher than filter material layer, and be Z place apart from the degree of depth on the casing top of sealing, another port of raw water tubes is by the raw water pipeline of raw water pump connection upstream; A port of emptying water pipe is communicated with the water distribution mouth of pipe of the emptying water pipe of grills bottom in the filtrate separator, and the another port of emptying water pipe is communicated with the reaction tank that each water body containment system constitutes by the valve of coupling respectively; A port of recoil tracheae is communicated with row's water purifying water distribution mouth of pipe of grills in valve F2 and the filtrate separator, and another port of recoil tracheae is communicated with the high pressure gas pipeline of the gas blower of aerating system; The inlet of row's recoil water pipe is arranged on the closed box top, and row's recoil water pipe is communicated with the equal stringing that refluxes by air valve F3.Shore pipe is set by valve F11, F12 are communicated with sludge sump 11 separately at the bottom of the pond of reaction tank.
Filtrate can be selected quartz filter sand for use, plastics filter pearl, also can select gac for use, can also select the good filtrates of absorption property such as commercially available soft spandex fiber filtrate for use, the loss of filtrate when selecting for use the lighter filtrate of proportion should consider to be provided with measure such as filter screen to prevent to recoil at row recoil pipe inlet.
The working method of the present invention when purifying waste water is: A or B reaction tank adopt by timed interval alternate run; At first the A reaction tank is carried out suction and is produced the water task, this moment, the A reaction tank had the biochemical sophisticated former water that stops certain hour, suction valve F8, suction pump 20, under meter 19 and sterilizer 18 under this former water connects by the film tow 56 of the MBR membrane bioreactor 16 under the A reaction tank, the pipeline that confluxes have become water outlet up to standard, this water outlet up to standard is transported to regeneration pond 17 by producing the water adapter, and aerating system is to the hollow-fibre membrane tow aeration of MBR membrane bioreactor in the time of suction; When the A reaction tank is carried out suction product water task, when being lower than setting height, the water level of B reaction tank begins to mend full former water, close air valve F3, by raw water pump former water is passed through filter material layer 8, pass the water distribution mouth of pipe 10 that grills 9 enters the emptying water pipe, former penstock F7, water distributing pipe by emptying water pipe 10g, B pond coupling enter under B reaction tank casing, when the water level of B reaction tank is higher than setting height, close former penstock F7 and raw water pump; Carrying out suction product water at the A reaction tank is through with task time, B begins reaction tank and carries out suction product water task, when being lower than setting height, the water level of A reaction tank begins moisturizing, steering routine is similar to above-mentioned B pond water supplementing method, only open and close whole valves of its coupling, so go round and begin again, infinite loop is until finishing the sewage purification task.
Sewage is by behind the filtrate of separator, oil-containing and useless soap lye and body fat binding substances are adsorbed on filter material surface by filtrate, water is abandoned in the food and drink of this technology particularly suitable, the shower draining accounts for the processing of the sewage of larger proportion, hole between the filtrate can guarantee not blocked with the pressure adequate compensation, also be unlikely to excessive and lose filteration, the regeneration of filtrate also can be carried out with fairly simple method, can utilize time variable control when the filtrate obstruction has especially severe, just not recoil, prevent that solid shape pollutent from making the filtrate bonding, and utilize the cohesiveness of its absorption principle that the solid substance in the sewage is retained in the filtrate, the air-flow for the treatment of high-strength flow velocity thereafter is from the recoil that the bottom makes progress, filtrate is rolling, the phase mutual friction, when shampooing and rubbing dirt is broken away from, media filtration is regenerated; Because than low water flow rate the time, biochemical film can adhere at filtrate, and this separator can be used as the producer of assembling the biochemical film of growth and when recoil biochemical film fragment transferred in the former trip equipment waterborne and use as active bacteria.
A kind of working method of filtrate separator recoil of the present invention is: raw water tubes stops to supply water; The valve closes of all emptying water pipes, the air valve F3 that the recoil tracheae is communicated with opens, the high pressure bubble of the gas blower of aerating system enters the water distribution mouth of pipe 10 of emptying water pipe in grills bottom in the filtrate separator, it is in the former water layer more than the Z that the high pressure bubble passes the degree of depth apart from the closed box top that filtrate carries the top of the filtrate separator internal adsorption filtrate that impurity rises, supply with former water by raw water pump from raw water tubes, the former water that carries impurity that proportion is bigger is discharged outside the filtrate separator from row's recoil water pipe, repercussion effect was directly proportional with the recoil time, and effect is set recoil time and pitch time in auto-programming on the estimation.The present invention has given full play to physical method and has directly removed some tangible impurity in the sewage, can preferentially adopt physical method to reach purpose of energy saving in the characteristics that compare more than the biochemical method unit consumption of energy minimizing several times; The filtering material filter saving recoil water 90% that theoretical estimation is more traditional is handled again because the recoil water generally also will be got back to system, therefore not only can save the recoil time 60%, has also improved the processing power and the efficient of equipment; In addition, the recoil water generally contains the organic matter of higher concentration, the recoil process makes and contain the time lengthening that the former water of high density stops in first section flow process of system, can increase its time biochemical under hyperoxia concentration or anaerobism atmosphere in conjunction with other measure, for example make to contain the former water of high density and carry and return equalizing tank and continue biochemical.
Further alternative scheme 2 on the system-based of the purifier of scheme 1, its difference is, the dissolved air flotation device 21 of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, dissolved air flotation device 21 comprises unlimited casing 25, bubble generation head 26, raw water tubes 2h, receives pure water pipe 24, row's muddy water pipe 23 and turbidity detector (not drawing among the figure); Dissolved air flotation device 21 bottoms are provided with bubble generation head 26, and another port that bubble generation head 26 is taken over is communicated with the high pressure gas pipeline 1g of the gas blower 1 of aerating system by valve F13; Dissolved air flotation device 21 tops are provided with overflow weir 22; Receipts pure water pipe 24 is arranged on the top of rectangular box in the dissolved air flotation device 21, the port upper tube wall of this receipts pure water pipe 24 is h apart from the lower height of 22 mouthfuls of overflow weirs, and the another port of receiving pure water pipe 24 is communicated with the inlet of the raw water tubes 2g of downstream filtrate separator 5 by raw water pump 2; The bottom land of overflow weir 22 is communicated with the mouth of pipe of an end of row's muddy water pipe 23, and the mouth of pipe of the other end of row's muddy water pipe 23 is communicated with mud thickener (not drawing among the figure); At the bottom of 22 mouthfuls of the distance overflow weirs degree of depth k transmitter of turbidity detector is set, the distance that this sensor location is higher than the port upper tube wall of emptying water pipe is G, h=k+G; The port of raw water tubes 2h is communicated with lower section pipe arrangement 27 in the dissolved air flotation device, and another port of raw water tubes is communicated with equalizing tank 3 by raw water pump 2b.
Working method and the difference of scheme 1 of this scheme when purifying waste water is as follows, all the other are basic identical: former water enters dissolved air flotation device 21 bottoms from equalizing tank 3, pump 2a and distribution piping 27, air forms micro bubble by valve F13, bubble generation head 26 and takes former liter waterborne, solid substance in the former water, the insoluble substance that the oil droplet isodensity is lighter, in the way of rising, move to overflow weir 22 1 sides, particularly close when stopping to supply water at former penstock, insoluble substance accumulates in dissolved air flotation device 21 upper positions apart from the original water gauge face more than the bottom degree of depth k of overflow crest of weir; When the A reaction tank is carried out suction product water task, when the water level of B reaction tank is lower than setting height, the former penstock F7 of intermittently starting mends full former water by raw water pump in the B reaction tank, at this moment, close air valve F3, will enter affiliated B reaction tank casing by affiliated former penstock F7, the water distributing pipe 12 of receiving pure water pipe 24, filtrate separator, B pond at the G section water purification layer below the degree of depth k of the bottom of distance overflow crest of weir by raw water pump again; When the B reaction tank was carried out suction product water task, when the water level of A reaction tank was lower than setting height, steering routine was similar to above-mentioned B pond water supplementing method, only opened and closed its affiliated valve, so went round and began again, and infinite loop is until finishing the sewage purification task; According to the sensor detecting of turbidity detector to raw water turbidity apart from the bottom degree of depth k of overflow crest of weir, when greater than set(ting)value, intake from raw water tubes by Controlling System unlatching raw water pump or former water valve, discharge by overflow weir with the water of discharging more than the new former water degree of depth k section that turbidity is high from equalizing tank, turbidity stops the raw water tubes water inlet during less than set(ting)value when liquid level reaches the overflow crest of weir.The turbidity detector is the variation according to insoluble substance Guinier-Preston zone and water purifying transmittance, finishes the output that muddy water is discharged signal by the signal processing of photo-sensor, reaches the control of discharging muddy water, and the turbidity detector is a public technology.The effect of this dissolved air flotation device of connecting is to strengthen separating effect, particularly butyraceous sewage at first enters the dissolved air flotation device from equalizing tank, lighter grease aggregation rises under the effect of the micro bubble that the bubble generation head discharges, can be discharged to equalizing tank again by overflow weir, in circulation, do usefulness with airborne oxygen, or in equalizing tank, have an effect with anerobe and constantly digested, perhaps be discharged to sludge sump and concentrate.
Further alternative scheme 3, the preceding raw water pump of port that enters the filtrate separator adopts the air-flow water-jet pump, replaces the air-flow water-jet pump 2 of the general impeller pump that adopts to comprise high pressure gas nozzle 65, former water inlet adapter 64, vacuum chamber 62 and dilating catheter 61; Vacuum chamber 62 is hollow cylinder thin-walled tube, and former water inlet is taken over 64 1 ends and is communicated with raw water tubes 2g, and former water inlet is taken over 64 the other ends and is communicated with thin-walled tube 62; Dilating catheter 61 is the circular cone thin-walled tube; The axis of high pressure gas nozzle 65, vacuum chamber 62 and dilating catheter 61 is concentric; Dilating catheter 61 is arranged in the vacuum chamber 62, high pressure gas nozzle 65 straight smaller diameter end to dilating catheter 61; Being connected with vacuum chamber 62 lower ends and sealing than the larger diameter end outer wall of dilating catheter 61 also is communicated with the equal stringing 6 of former water by conduit 63, and the tube wall of high pressure gas nozzle 65 is connected with vacuum chamber 62 upper ends; The other end of high pressure gas nozzle 65 is communicated with the high pressure gas pipeline 1g of the gas blower 1 of aerating system by valve F1; Be communicated with row's recoil water pipe 4g at the top of filtrate separator 5, row's recoil water pipe 4g one end is communicated with air valve F3, the air valve F3 the other end is communicated with the equal stringing 4 of backflow in dissolved air flotation device or inclined tube/dissolved air flotation device or the equalizing tank inner chamber bottom water, or after crossing air valve by sealing, gas is threaded a pipe in the water of connected reaction pond bottom.It is public technology that sealing is crossed air valve, and it can make gas pass through, and liquid can not pass through.
Working method and the difference of scheme 1 of this scheme when purifying waste water is as follows, all the other are basic identical: when the water level of reaction tank is lower than setting height, when opening the former penstock of reaction tank, the negative pressure that the high pressure gas of air-flow water-jet pump 2 produces at vacuum chamber 56 injections with the former water of equalizing tank by former water equal stringing 6 inject in the casing 7 of filtrate separator 5, gas and former water sepn, the gas temporal aggregate is on casing 7 tops, the high pressure gas of air-flow water-jet pump 2 will be passed through filter material layer 8 with former water, pass the water distribution mouth of pipe 10 that grills 9 enters, by emptying water pipe emptying water pipe 10g, the former penstock of A or B pond coupling, water distributing pipe enters affiliated reaction tank casing; When the water level of reaction tank is higher than setting height, close former penstock, open air valve F3, continuation is injected former water in the casing 7 of filtrate separator 5 by the equal stringing 6 of former water, if after being full of former water in the casing 7, air valve F1 that can closed gas flow water-jet pump 2 also can work on, the air water mixed stream enters in the container of the equal stringing 4 of backflow of equalizing tank or upstream and downstream, to the former water aeration in this container by row recoil water pipe 4g, air valve F3 simultaneously.
This scheme is as follows with the difference of scheme 1 in the working method of filtrate separator recoil, and all the other are basic identical: raw water tubes 2g stops water supply; The valve closes of all emptying water pipes, the air valve F3 that the recoil tracheae is communicated with opens, the high pressure bubble of the gas blower of aerating system enters the water distribution mouth of pipe 10 of grills bottom emptying water pipe 10g in the filtrate separator, it is in the former water layer more than the Z that the high pressure bubble passes the degree of depth apart from the closed box top that filtrate carries the top of the filtrate separator internal adsorption filtrate that impurity rises, open valve F1 this moment again, supply with former water and air mixed stream by air-flow water-jet pump 2 from raw water tubes 2g, the former water that carries impurity that proportion is bigger is discharged the filtrate separator from row's recoil water pipe 4g, because back flushing air entrapped air so recoil time are shorter, more save recoil water.
It is shorter that employing this programme is particularly suitable for the distance of equalizing tank and separator, and from the nearer occasion of gas blower high pressure pipe.Utilize the air-flow water-jet pump directly former water to be risen to the filtrate separator from equalizing tank, thereby saved the big and higher pump of running cost of other investment, impeller pump for example, and in the Jiang Yuanshui conveying, utilize air oxygen supply the aerobic bacteria of former water, promoted aerobic processes; Finish air that former water the carries aerobic bacteria of former water of above-mentioned each inner chamber that can import the oxygen supply that all can further utilize air in dissolved air flotation device or inclined tube/dissolved air flotation device or the equalizing tank inner chamber bottom water, because of water delivery has taken into account the oxygen supply of aerobic processes simultaneously, has energy-saving effect.
Another optional scheme 4 on the system-based of the purifier of such scheme 1 or 2, the inclined tube separator 28 of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, inclined tube separator 28 comprises unlimited casing 29, grills 31, raw water tubes 2i, receives pure water pipe 24, row mud valve F15 and inclined tube 30; Casing 29 bottoms are provided with grills 31, and inclined tube 30 is filled on grills 31 tops; The port of raw water tubes 2i enters grills bottom distribution nozzle 27 in the inclined tube separator, and another port of raw water tubes is communicated with equalizing tank 3 by raw water pump 2c; Raw water pipeline 2i is communicated with dosing pump 33 high-pressure outlets, and dosing pump 33 low-pressure inlets are communicated with flocculation agent medicinal cupping 32; A port receiving pure water pipe 24 is arranged on the top that the inclined tube separator is filled inclined tube, and the another port of receiving pure water pipe 24 is communicated with the raw water tubes 2g inlet of downstream separator by raw water pump 2a; The port of row's mud valve F15 is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve F15 is communicated with sludge thickener 11 by pipeline.The equal stringing 24 that refluxes is set on the intravital inclined tube of inclined tube separator case 31 tops.
Working method and the difference of scheme 1 of this programme 4 when purifying waste water is as follows, as follows with the difference of scheme 1, all the other are basic identical: former water enters inclined tube separator 21 bottoms from equalizing tank 3, pump 2b and distribution piping 27, in the former liter waterborne way, insoluble substance sedimentation downwards under the stratified effect of inclined tube that solid substance isodensity in the water is heavier, particularly cohesion is deposited to the inclined tube bottom for bigger floss under the effect of flocculation agent, regularly discharges floss to sludge thickener from inclined tube separator bottom row's mud valve F15.Water purification rises and enters the raw water tubes 2g of downstream separator from receiving pure water pipe.This method is effective especially to removing the bigger solid substance of useless soap lye and body fat binding substances or proportion in the former water, can reduce the segregational load of follow-up dissolved air flotation device or filtrate separator.Can between dissolved air flotation device and filtrate separator, the inclined tube separator being set, this mode is to needing useless soap lye of removal and body fat binding substances more for a long time in the former water, particularly contain silt particle more for a long time, or when requiring further reduction equipment volume, purify effective especially.
On the system-based of the purifier of scheme 1, association schemes 2 and scheme 4 further alternative schemes 5; Raw water pump at equalizing tank is provided with inclined tube/dissolved air flotation device 34 with being communicated with of filtrate separator between the raw water tubes, inclined tube/dissolved air flotation device 34 comprises unlimited casing 35, bubble generation head 36, the turbidity detector, grills 31, raw water tubes 2j, receive pure water pipe 24, row's muddy water pipe 23, row mud valve F17 and inclined tube 30, the rectangular box 35 of inclined tube/dissolved air flotation device is divided into dissolved air flotation section and inclined tube segregation section up and down, inclined tube segregation section is in the bottom, the dissolved air flotation section is on top, two ends are the series connection of head and the tail order up and down, the dissolved air flotation pars infrasegmentalis is provided with bubble generation head 36, and another port that bubble generation head 36 is taken over is communicated with the high pressure gas pipeline 1g of the gas blower of aerating system by valve F16; Dissolved air flotation section top is provided with overflow weir 22; A port receiving pure water pipe is arranged on the middle and upper part of rectangular box in the dissolved air flotation section, the port upper tube wall of this receipts pure water pipe is h apart from the lower height of overflow crest of weir, and the another port of receiving pure water pipe is communicated with the inlet of the raw water tubes 2g of downstream filtrate separator by raw water pump; The bottom land of overflow weir 22 is communicated with the mouth of pipe of an end of row's muddy water pipe 23, and the mouth of pipe of the other end of row's muddy water pipe 23 is communicated with the mud thickener; Inclined tube segregation section bottom is provided with grills 31, fills inclined tube 30 between grills 31 tops and the bubble generation head; The port of raw water tubes 2j enters the distribution nozzle 27 of rectangular box in the inclined tube segregation section, and another of raw water tubes 2j is communicated with equalizing tank 3 by raw water pump 2d; Raw water pipeline 2j is communicated with dosing pump 33 high-pressure outlets, and dosing pump 33 low-pressure inlets are communicated with flocculation agent medicinal cupping 32; The port of row's mud valve F17 is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve F17 is communicated with sludge thickener 11 by pipeline.At the bottom of the distance overflow crest of weir degree of depth k transmitter of turbidity detector is set, the distance that this sensor location is higher than the port upper tube wall of emptying water pipe is G, h=k+G;
Working method and the difference of scheme 1 following working method with scheme 2 and the scheme 3 comprehensive back of this programme 5 when purifying waste water is basic identical; This scheme only needs when using to detect raw water turbidity apart from the bottom degree of depth k of overflow crest of weir according to the turbidity detector, when greater than set(ting)value, intake from raw water tubes by Controlling System unlatching raw water pump or former water valve, the former water of discharging from equalizing tank at first enters inclined tube segregation section, directly rise and enter the dissolved air flotation section, muddy water with the new former water degree of depth k section that turbidity is high is discharged by overflow weir, and turbidity is to stop less than set(ting)value; Alternative 2 and scheme 3, this programme is in the same place two kinds of function synthesizeds of inclined tube separator and air supporting separator, more compact structure, material is saved, and the path shortens, non-power consumption, separation efficiency is higher, wider to water quality treatment.
Another optional scheme 6, in each reaction tank one side of soaking the MBR membrane bioreactor microbial film filtrate district is set, the distribution piping of microbial film filtrate and connection raw water tubes 2g is set in microbial film filtrate district, microbial film filtrate 49 is laid on the hole pattern 48, hole pattern 48 utilizes web member to be fixed on the reaction pool wall, hole pattern 48 bottoms are provided with aeration tube, and the aeration tube the other end is communicated with the high pressure gas pipeline of the gas blower of aerating system by valve; The raw water tubes of the discharge of filtrate separator is communicated with the distribution piping that microbial film filtrate district is provided with.This programme has increased former aquaticization effect, has improved the reliability of sewage biochemistry.
Further alternative scheme 7, chemical rinse-system of the present invention comprises that chemical medicine is washed subsystem and the MBR membrane bioreactor moves and lifting machine, it is between the reaction tank 16 and 13 that soaks each MBR membrane bioreactor the membrance chemistry medicine to be set to wash soaking box 41 that the chemistry medicine is washed subsystem, the chemistry medicine is washed soaking box 41 tops physic liquor intake tube 42 is set, physic liquor intake tube is communicated with the high-pressure side to spray pump 45, the low pressure end of giving spray pump 45 is respectively by series washing soup hold tank valve and coupling thereof and that be communicated with bottom, the chemistry medicine is washed soaking box 41 bottoms and is communicated with emptying valve emptying valve F24 respectively and returns drug liquid tube 43, returns drug liquid tube 43 the other ends by drain pump 44, valve separately is communicated with the washing soup hold tank top of coupling; It is on each top of soaking the reaction tank of MBR membrane bioreactor crane beam to be set that described MBR membrane bioreactor moves with the lifting assembly, crane beam is fixed on reaction pool wall, the foundation of civil work by portalframe, crane beam is provided with the lifting machine of the portable MBR membrane bioreactor of coupling, move with lifting machine be market sale move horizontally electric bicycle and vertical electric hoist associated plant.This moves horizontally electric bicycle can make refining plant move toward complex line along cable guide rail, can also utilize this crane loading MBR membrane bioreactor and move up and down, with finish installations, chemistry washes and maintenance task.Mobile and lifting machine itself is a prior art.During cleaning, the hollow-fibre membrane that pollutes is immersed in the membrance chemistry medicine to be washed in the water purification of soaking box, in the suitable water purification of temperature, drop into high concentrated acid or the alkali cleaning medicine is diluted to proper ratio, can be when soaking to the hollow-fibre membrane aeration to accelerate cleaning speed, after the cleaning MBR membrane bioreactor is washed soaking box 41 from chemical medicine and hang out, the last clear liquid medicine of post precipitation utilizes drain pump 44 to be transported to washing soup hold tank 46,47 respectively from valve F20, the F22 that returns drug liquid tube 43 couplings and uses for cleaning another MBR membrane bioreactor; Sedimentary dirt soup is got rid of by emptying valve F24; MBR membrane bioreactor after acid or alkali cleaning soup clean reuses after with water purification rinsing only.
Further alternative scheme 8 is provided with separator between the reaction tank of two immersion MBR membrane bioreactors.Can holding concurrently of the separator of this programme washed soaking box for the membrance chemistry medicine of chemical rinse-system, for the filtrate separator a kind of benefit arranged more, also filtrate carried out chemical medicine when exactly filtrate separator loam cake being opened back immersion MBR membrane bioreactor and washes.
Another optional scheme 9 on the basis of such scheme 6 or 7, be clipped in two A that soak the MBR membrane bioreactor, chemical medicine between the B reaction tank 16 and 13 is washed soaking box 41 bottoms and is communicated with, can regard as like this by A, the B reaction tank constitutes same Da Chi 40, near these Da Chi 40 left and right sides walls microbial film filtrate district 37 is being set all, the raw water tubes 2g of the discharge of filtrate separator is communicated with A, the distribution piping 38 that the microbial film filtrate district 37 in B pond is provided with, distribution piping 38 is separately positioned on 37 places, microbial film filtrate district, in 37 bottoms, microbial film filtrate district aeration tube 39 is set, aeration tube 39 the other ends are communicated with the high pressure gas pipeline 1g of the gas blower of aerating system by valve; A, B pond are washed soaking box 41 left and right sides sidewalls at close membrance chemistry medicine MBR membrane bioreactor 15 are set.Though adopt the liquid of two reaction tanks of this programme to circulate mutually, but because distribution piping 38 is separately positioned on the microbial film filtrate district of Da Chi 40 both sides, away from the MBR membrane bioreactor, distribution piping 38 effusive former water just enter the film tow of MBR membrane bioreactor after stopping certain hour through aeration biochemical, so only be beneficial to producing quality.At A, the MBR membrane bioreactor in B pond adopts when taking turns to aspirate, when the former water of intermittent entry is taken turns in anti-circulation, when the MBR in A pond membrane bioreactor aspirates, when the MBR membrane bioreactor in B pond is in and stops suction and go forward side by side former water, at the MBR in the B pond membrane bioreactor water of original stop long period, at first flow into the MBR membrane bioreactor in A pond from the fluid passage between two reaction tanks, produce water for suction pump, since otherwise in another circulation, this migration of former water has increased mixing of former water and aeration and has prolonged the residence time of air at former water, increased the amount that former water carries oxygen molecule, therefore has energy-saving effect, and be beneficial to avoid the dead angle that produces the mud of being detained at the bottom of the case, help in addition participating in following bad as bacterial classification after the backflow of active sludge in the reaction tank.
Further alternative scheme 10 for the reaction tank of the immersion MBR membrane bioreactor at the bottom of this routine flat pond, is provided with at the bottom of the flat pond and scrapes the mud assembly; Scrape that the mud assembly comprises mechanical transmission mechanism, scrapes the mud car, tow, Driving-mud Pump and control stopper; Mechanical transmission mechanism comprises electric reducer, drives arbor wheel, bearing support and driven arbor wheel, and the length direction both sides utilize bearing support to be provided with respectively and drive arbor wheel and driven arbor wheel at the bottom of flat pond; The shaft extension of driving arbor wheel goes out to react pool wall and seals with sealing member, and the axle head that stretches out that drives arbor wheel utilizes shaft coupling and electric reducer to connect, and the pedestal of electric reducer is fixed on the basis; Scrape the mud car and comprise framework, cleaning shoe, castor and axle, castor is bound up on framework by axle, and framework is a rectangle, about two cleaning shoes be symmetrical set on framework, mesh the Ping Chi baseplane of castor and reaction tank; Tow one end is fixed on the left end of scraping the mud car, the tow the other end passes driven arbor wheel and is fastened in mid-game between left side dish that drives arbor wheel and mid-game, it twines length of run above length direction two lateral extents at the bottom of the flat pond, and the back continues to be fixed on the right-hand member of scraping the mud car after winding is stretched out between mid-game and the right dish; Two Driving-mud Pump are separately positioned on length direction both sides at the bottom of the flat pond, and the spoil disposal slurry of Driving-mud Pump is communicated with sludge thickener by conduit.Scrape the mud car and regularly move back and forth the mud that is deposited at the bottom of the reactor lower part pond is scraped to both sides Driving-mud Pump import, available pump is discharged.
This equipment can be considered following system known per and operation thereof respectively when finishing technical process of above-mentioned several system principle scheme and piping system and using method thereof:
A) this purifier can adopt technologies such as aerobic anaerobic process or ICEAS;
B) use of this equipment can be finished by the automatic train control system of PLC sequence controller.
Advantage and positively effect that the present invention has are:
1, the water body of the present invention's requirement does not have special restriction to its water quality, particularly adapt to the more abominable water quality of oil-containing or useless soap lye and body fat binding substances or silt particle, improved MBR membrane bioreactor antifouling property, reduced to MBR membrane bioreactor chemistry wash number of times; The principle of utilizing biochemical film to adhere at filtrate, this separator can be used as the producer of assembling the biochemical film of growth and use, and make biochemical and filtration mechanism combines; Because media such as filtrate are cheap and easy to get, loading capacity is big, should not stop up; The present invention has reduced running cost in sum, and operation is simplified more.
2, mud car assembly is scraped in employing, and water depth only need guarantee the minimum requirement of vertical range of the biochemical reactor of submergence purifier, has solved the low difficulty of sewage disposal station height.
3, adopt air water to unite recoil for the filtrate separator, water-saving has improved efficient, reduced system operation cost, utilized filtrate absorption dissolved oxygen characteristics further to improve biochemical efficiency, automatization level further improves, can accomplish unmanned, intelligent control fully.
4, utilize the lifting assembly of chemical rinse-system and portable MBR membrane bioreactor to reduce installation and maintenance labour intensity.
Description of drawings
Fig. 1 is the system schematic of the purifier of employing filtrate separator of the present invention and immersion membrane bioreactor combination.
Fig. 2 is the system flow synoptic diagram that the present invention adopts the dissolved air flotation device.
Fig. 3 is the system flow synoptic diagram that the present invention adopts the inclined tube separator.
Fig. 4 is the system flow synoptic diagram that the present invention adopts inclined tube/dissolved air flotation device.
Fig. 5 is that the present invention adopts the filtrate separator, at two reaction tank intermediate connections of A, B, and the system flow synoptic diagram that the membrance chemistry medicine is washed soaking box is set.
Fig. 6 is that the present invention adopts two reaction tank intermediate connections at A, B, and the system flow synoptic diagram of filtrate separator is set.
Fig. 7 is the structural representation of the purifier of the system flow that shows of Fig. 4, or the C-C sectional view of Fig. 8.
Fig. 8 is the structural representation of the purifier of the system flow that shows of Fig. 4, or the A-A sectional view of Figure 10.
Fig. 9 is the front view of structure of the purifier of the system flow that shows of Fig. 4.
Figure 10 is the structural representation of the purifier of the system flow that shows of Fig. 4, or the B-B sectional view of Fig. 9.
The structural representation of the purifier of the system flow that Figure 11 Fig. 4 shows, or the vertical view of Fig. 9.
Figure 12 is the sectional view that the air-flow water-jet pump amplifies.
Figure 13 is the structural representation of the purifier of the system flow that shows of Fig. 5, or the D-D sectional view of Figure 14.
Figure 14 is the front view of structural representation of the purifier of the system flow that shows of Fig. 5.
Figure 15 is the structural representation of the purifier of the system flow that shows of Fig. 5, or the vertical view of Figure 14.
Figure 16 is the vertical view that the part 73 of the purifier of the system flow that shows of Fig. 5 amplifies.
Wherein: the 1-gas blower, 1g-high pressure gas pipeline, 2,2b, 2c, the 2d-pump, 2a air-flow water-jet pump, 2g, 2h, 2i, the 2j-raw water tubes, 3-equalizing tank, the 4-equal stringing that refluxes, 4g-row recoil water pipe, 5-filtrate separator, the equal stringing of the former water of 6-, 7-closed box, 8-filter material layer, 8a, 8b, the 8c-filtrate, the 9-grills, 10-water purification water shoot inlet, 10g-emptying water pipe, the 11-sludge sump, 12-aeration spray tube, 13-reaction tank B, 14-upflow tube, the 15a-web member, 15b, 15c-immerseable hollow fiber film assembly, 15-MBR membrane bioreactor, 16-reaction tank A, the 17-pond of regenerating, the 18-sterilizer, 19-under meter, 20-suction pump, 21-dissolved air flotation device, the 22-overflow weir, 23-row muddy water pipe, 24-receives pure water pipe, the 25-casing, 26-bubble generation head, the 27-distribution piping, 28-inclined tube separator, 29-casing, the 30-inclined tube, the 31-grills, 32-flocculation agent medicinal cupping, 33-dosing pump, 34-inclined tube/dissolved air flotation device, the 35-casing, 36-bubble generation head, 37-microbial film filtrate district, the 38-distribution piping, the 39-aeration tube, 40-Da Chi, 41-membrance chemistry medicine is washed soaking box, the 42-physic liquor intake tube, 43-returns drug liquid tube, 44-drain pump, 45-spray pump, 46-washing soup hold tank, 47-washing soup hold tank, 48-hole pattern, 49-microbial film filtrate, the 50-visor, the 51-hand hole, the transmitter of 52-turbidity detector, 53-aspirates equilibration tube, the 55-collecting pipe, 56-film tow, 57-effuser, the 57a-aeration pipeline that confluxes, the 58-header, the 58a-pipeline that confluxes, 59-MBR membrane bioreactor framework, 60-distribution piping, the 61-dilating catheter, 62-vacuum chamber, the 63-conduit, the former water inlet of 64-is taken over, 65-high pressure gas nozzle, the 66-travelling hoist, 67, the 67a-portalframe, the 68-hoist cable, the 69-cleaning shoe, 70-castor, 71-are scraped the mud car, the 72-framework, the 72a-structural uprights, the 73-tow, the vertical electric hoist of 74-, 75-moves horizontally electric bicycle, the 76-crane beam, the driven arbor wheel of 77-, 78-mechanical transmission mechanism, 79-Driving-mud Pump, the 80-mid-game, the right dish of 81-, 82-drives arbor wheel, 83-bearing support, the 84-sealing member, the 86-shaft coupling, 87-electric reducer, 88-basis, 89-left side dish, the 90-bearing support, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15, F16, F17, F18, F19, F20, F21, F22, F23, the F24-valve, F25-aspirates equilibrium valve.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Show that at Fig. 1,11,12 the present invention adopts the system flow embodiment 1 of filtrate separator; The purifier of separator and immersion membrane bioreactor combination and system realize with following technical scheme 1: purifier and system comprise MBR membrane bioreactor, Yuan Shui, aerating system, separator, process system flow process and pipeline, water body containment system, chemical rinse-system and sequence control system; Process system flow process and piping system comprise the pipeline that former water transfer line and filtrate are discharged; The MBR membrane bioreactor 15 that has shown the purifier that has sold in market at Figure 11.This reactor comprises the pipeline 58a that confluxes that two membrane module 15b, 15c and filtrate are discharged, and the long medullary ray of all membrane modules of each reactor is parallel to each other; Membrane module comprises film tow 56 and collecting pipe 55; The film silk of many tubular fibres is formed the film tow 56 of pectination, and film tow bore passages two ends are communicated with up and down collecting pipe 55; All membrane modules utilize web member 15a to hang and are arranged in the reaction tank 16,13 that opens wide up and down, reaction tank is that tubular is gone along with sb. to guard him casing, tubular go along with sb. to guard him casing by with the vertical wall of sea line and surrounding, the described flange that confluxes is fixed on the web member of wall of tubular fender body; The collecting pipe 55 of all membrane modules all is communicated with by the pipeline 58a that confluxes that header 58 and filtrate are discharged, and the pipeline 58a that confluxes is communicated with by pipeline and suction pump 20; The serial aeration spray tube 12 of aerating system is by connecting the bottom that rope spare is fixedly installed on each film tow 56, and all aeration spray tubes 12 are communicated with by effuser 57 and the aeration pipeline 57a that confluxes, and the aeration pipeline that confluxes is communicated with aeration main 1g by pipeline; MBR membrane bioreactor 15 is to adopt the vertical membrane module that uses of film tow.These all are prior arts.
This purifier is provided with a pair of (A and B) MBR membrane bioreactor 16,13, every pair of MBR membrane bioreactor comprises two immerseable hollow fiber film assembly 15b, 15c; Each MBR membrane bioreactor is immersed in the reaction tank of water body containment system formation, the casing of reaction tank for opening wide; Sanitary sewage enters the equalizing tank 3 of purifier, connecting between the raw water tubes of the raw water pump 2 of equalizing tank 3 and reaction tank is communicated with filtrate separator 5, and filtrate separator 5 comprises closed box 7, grills 9, raw water tubes 2g, emptying water pipe 10g, row's recoil water pipe 4g, recoil tracheae and filter material layer 8; Filtrate separator bottom is provided with permeable hole and can stops the grills 9 of the filtrate of larger particles degree, and the filtrate of absorption is filled on grills 9 tops, and this filtrate is filled 30%～70% of filtrate separator internal box volume total height; The port of raw water tubes 2g enters the equal stringing 6 of former water on the top of filtrate separator internal adsorption filtrate, the equal stringing of this former water is arranged on the upper surface of a little higher than filter material layer, and be Z place apart from the degree of depth on the casing top of sealing, another port of raw water tubes 2g is by the raw water pipeline of raw water pump 2 connection upstreams; The port of emptying water pipe 10g is communicated with the water distribution mouth of pipe 10 of grills bottom in the filtrate separator, and the another port of emptying water pipe 10g is communicated with two reaction tanks 16,13 that each water body containment system constitutes by valve F6, F7 respectively; A port of recoil tracheae is communicated with the water distribution mouth of pipe 10 of the water purification water shoot 10g of grills in valve F2 and the filtrate separator, and another port of recoil tracheae is communicated with the high pressure gas pipeline 1g of the gas blower of aerating system; The inlet of row's recoil water pipe 4g is arranged on closed box 7 tops, and row's recoil water pipe 4g is communicated with the equal stringing 4 that refluxes by air valve F3; Shore pipe is set by valve F11, F12 are communicated with sludge sump 11 separately at the bottom of the pond of reaction tank 16,13.The filtrate of present embodiment is selected quartz filter sand for use.
Together with suction equilibrium valve F25 and suction equilibration tube 53, suction equilibration tube 53 1 ends are communicated with suction equilibrium valve F25 at the suction pump suction port, and the port of suction equilibration tube 53 the other ends is higher than the maximum water level in the reaction tank.
In Fig. 2, shown the system flow embodiment 2 that the present invention includes filtrate separator and air supporting separator, present embodiment is on the system-based of purifier shown in Figure 1, its difference is, the dissolved air flotation device 21 of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, dissolved air flotation device 21 comprises unlimited casing 25, bubble generation head 26, raw water tubes 2h, receives pure water pipe 24, row's muddy water pipe 23 and turbidity detector (not drawing among the figure); Dissolved air flotation device 21 bottoms are provided with bubble generation head 26, and another port that bubble generation head 26 is taken over is communicated with the high pressure gas pipeline 1g of the gas blower 1 of aerating system by valve F13; Dissolved air flotation device 21 tops are provided with overflow weir 22; Receipts pure water pipe 24 is arranged on the top of rectangular box in the dissolved air flotation device 21, the port upper tube wall of this receipts pure water pipe 24 is h apart from the lower height of 22 mouthfuls of overflow weirs, and the another port of receiving pure water pipe 24 is communicated with the inlet of the raw water tubes 2g of downstream filtrate separator 21 by raw water pump 2a; The bottom land of overflow weir 22 is communicated with the mouth of pipe of an end of row's muddy water pipe 23, and the mouth of pipe of the other end of row's muddy water pipe 23 is communicated with mud thickener (not drawing among the figure); At the bottom of 22 mouthfuls of the distance overflow weirs degree of depth k transmitter of turbidity detector is set, the distance that this sensor location is higher than the port upper tube wall of emptying water pipe is G, h=k+G, k=G; The port of raw water tubes 2h is communicated with lower section pipe arrangement 27 in the dissolved air flotation device, and another port of raw water tubes is communicated with equalizing tank 3 by raw water pump 2b; A port receiving pure water pipe 24 is communicated with the top that is arranged on dissolved air flotation device 21, and the another port of receiving pure water pipe 24 is communicated with the inlet of downstream filtrate separator 5 by pump 2.
The raw water pump that this example enters the filtrate separator adopts air-flow water-jet pump 2a (seeing Figure 12), replaces the air-flow water-jet pump 2 of the general impeller pump that adopts to comprise high pressure gas nozzle 65, former water inlet adapter 64, vacuum chamber 62 and dilating catheter 61; Vacuum chamber 62 is hollow cylinder thin-walled tube, and former water inlet is taken over 64 1 ends and is communicated with raw water tubes 2g, and former water inlet is taken over 64 the other ends and is communicated with thin-walled tube 62; Dilating catheter 61 is the circular cone thin-walled tube; The axis of high pressure gas nozzle 65, vacuum chamber 62 and dilating catheter 61 is concentric; Dilating catheter 61 is arranged in the vacuum chamber 62, high pressure gas nozzle 65 straight smaller diameter end to dilating catheter 61; Being connected with vacuum chamber 62 lower ends and sealing than the larger diameter end outer wall of dilating catheter 61 also is communicated with the equal stringing 6 of former water by conduit 63, and the tube wall of high pressure gas nozzle 65 is connected with vacuum chamber 62 upper ends; The other end of high pressure gas nozzle 65 is communicated with the high pressure gas pipeline 1g of the gas blower 1 of aerating system by valve F1; Be communicated with row's recoil water pipe 4g at the top of filtrate separator 5, row's recoil water pipe 4g one end is communicated with air valve F3, the air valve F3 the other end is communicated with the equal stringing 4 of backflow in dissolved air flotation device or inclined tube/dissolved air flotation device or the equalizing tank inner chamber bottom water, or after crossing air valve by sealing, gas is threaded a pipe in the water of connected reaction pond bottom.
In Fig. 3, shown the system flow embodiment 3 that the present invention includes filtrate separator and inclined tube separator; Present embodiment is on the system-based of the purifier shown in Fig. 1,2, the inclined tube separator 28 of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, inclined tube separator 28 comprises unlimited casing 29, grills 31, raw water tubes 2i, receives pure water pipe 24, row mud valve F15 and inclined tube 30; Casing 29 bottoms are provided with grills 31, and inclined tube 30 is filled on grills 31 tops; The port of raw water tubes 2i enters grills bottom distribution nozzle 27 in the inclined tube separator, and another port of raw water tubes is communicated with equalizing tank 3 by raw water pump 2c; Raw water pipeline 2i is communicated with dosing pump 33 high-pressure outlets, and dosing pump 33 low-pressure inlets are communicated with flocculation agent medicinal cupping 32; A port receiving pure water pipe 24 is arranged on the top that the inclined tube separator is filled inclined tube, and the another port of receiving pure water pipe 24 is communicated with the raw water tubes 2g inlet of downstream separator by raw water pump 2a; The port of row's mud valve F15 is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve F15 is communicated with sludge thickener 11 by pipeline.The equal stringing 24 that refluxes is set on the intravital inclined tube of inclined tube separator case 31 tops.
In Fig. 4,8,9,10,11, shown the purifier embodiment 4 that the present invention includes filtrate separator and inclined tube/dissolved air flotation device; Present embodiment is on the system-based of the purifier of Fig. 1, raw water pump at equalizing tank is provided with inclined tube/dissolved air flotation device 34 with being communicated with of filtrate separator between the raw water tubes, inclined tube/dissolved air flotation device 34 comprises unlimited casing 35, bubble generation head 36, turbidity detector (not drawing among the figure), grills 31, raw water tubes 2i, receive pure water pipe 24, row's muddy water pipe 23, row mud valve F17 and inclined tube 30, the rectangular box 35 of inclined tube/dissolved air flotation device is divided into inclined tube segregation section and air supporting segregation section up and down, inclined tube segregation section is in the bottom, the dissolved air flotation section is on top, two ends are the series connection of head and the tail order up and down, the dissolved air flotation pars infrasegmentalis is provided with bubble generation head 36, and another port that bubble generation head 36 is taken over is communicated with the high pressure gas pipeline 1g of the gas blower of aerating system by Flow-rate adjustment air valve F13; Dissolved air flotation section top is provided with the overflow weir 22 shared with reaction tank (can pass through overflow weir opposite side crest of weir (14), upflow tube eliminating during reaction tank water superelevation); 24 1 ports of receipts pure water pipe are arranged on the left side of the middle and upper part of rectangular box in the dissolved air flotation section, the port upper tube wall of this receipts pure water pipe 24 is h apart from the lower height of overflow crest of weir, and the another port of receiving pure water pipe 24 is communicated with the inlet of the raw water tubes 2g of downstream filtrate separator by raw water pump 2a; The bottom land of overflow weir 22 is communicated with the mouth of pipe of an end of row's muddy water pipe 23, and the mouth of pipe of the other end of row's muddy water pipe 23 is communicated with the mud thickener; Inclined tube segregation section bottom is provided with grills 31, fills inclined tube 30 between grills 31 tops and the bubble generation head; The port of raw water tubes 2i enters the distribution nozzle 27 of rectangular box in the inclined tube segregation section, and another of raw water tubes 2j is communicated with equalizing tank 3 by raw water pump 2d; Raw water pipeline 2j is communicated with dosing pump 33 high-pressure outlets, and dosing pump 33 low-pressure inlets are communicated with flocculation agent medicinal cupping 32.The equal stringing 24 that refluxes is set on the intravital inclined tube of inclined tube separator case 31 tops; At the bottom of the distance overflow crest of weir degree of depth k transmitter of turbidity detector is set, the port upper tube wall distance that this sensor location is higher than the emptying water pipe is G, h=k+G, k=G; The equal stringing 4 of backflow of filtrate separator is set on the intravital inclined tube of inclined tube segregation section case top; The port of row's mud valve F17 is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve F17 is communicated with sludge thickener 11 by pipeline.
The embodiment that has shown the purifier of native system in Fig. 8,9,10,11 is the structural representation that separator is set between the reaction tank of two immersion MBR membrane bioreactors.All parts in the system diagram 1 all can be able to be sat in the right seat in the figure.For make grills 9 filtrates do not run off and also flow resistance little, the granularity of filter material layer is from top to bottom according to reducing to distribute the granularity of the granularity of the granularity of filtrate 8a＜filtrate 8b＜filtrate 8c gradually.On the pool wall top of filtrate separator visor 50 is set in addition, the bottom is provided with hand hole 51, in order to change filtrate and to observe the filtration situation.
In each reaction tank one side of soaking the MBR membrane bioreactor microbial film filtrate district is set, the distribution piping 60 of microbial film filtrate 49 and connection raw water tubes 2g is set in microbial film filtrate district, microbial film filtrate 49 is laid on the hole pattern 48, hole pattern 48 utilizes web member to be fixed on the reaction pool wall, hole pattern 48 bottoms are provided with aeration tube, the aeration tube the other end is by the high pressure gas pipeline of the gas blower of valve connection aerating system, and aeration tube is used the aeration tube of hollow-fiber membrane bioreactor to save air; The raw water tubes of the discharge of filtrate separator is communicated with the distribution piping that microbial film filtrate district is provided with.
Shown that in Fig. 5,14,15,16,17,18 and 19 the present invention adopts the purifier embodiment 5 of the system flow of filtrate separator; Present embodiment is on the system-based of the purifier of Fig. 1, the filter material layer of present embodiment comprises plastics filter pearl and filter, grills 9 in plastics filter pearl bottom is provided with filter, and the slit on the filter is less than the diameter (known technology does not draw among the figure) of plastics filter pearl.The chemistry rinse-system comprises that chemical medicine is washed subsystem and the MBR membrane bioreactor moves and the lifting assembly.Its chemistry flushing subsystem is between the reaction tank 16 and 13 that soaks each MBR membrane bioreactor the membrance chemistry medicine to be set to wash soaking box 41, the membrance chemistry medicine is washed soaking box 41 tops physic liquor intake tube 42 is set, physic liquor intake tube is communicated with the high-pressure side to spray pump 45, pass through valve F21, F23 and be communicated with washing soup hold tank 46,47 bottoms respectively for the low pressure end of spray pump 45, the membrance chemistry medicine is washed soaking box 41 bottoms and is communicated with emptying valve 13 respectively and returns drug liquid tube 43, returns drug liquid tube 43 the other ends and is communicated with washing soup hold tank 46,47 tops by drain pump 44, valve F20, F22; It is on each top of soaking the reaction tank of MBR membrane bioreactor crane beam 76 to be set that described MBR membrane bioreactor moves with the lifting assembly, crane beam 76 is by portalframe 67,67a is fixed on reaction tank 40 walls, on the foundation of civil work, crane beam 76 is provided with the travelling hoist 66 of the portable MBR membrane bioreactor of coupling, travelling hoist 66 be market sale move horizontally electric bicycle 75 and vertical electronic lifting machine 74 associated plants, vertical electronic lifting machine 74 is connected conflux water lines and aerating pipelines that this framework is held concurrently MBR film biologic component by hoist cable 68 with MBR membrane bioreactor framework 59 web members.
At two A that soak the MBR membrane bioreactor, membrance chemistry medicine between the B reaction tank 16 and 13 is washed soaking box 41 bottoms and is communicated with, can regard as like this by A, the B reaction tank constitutes same Da Chi 40, near these Da Chi 40 left and right sides walls microbial film filtrate district 37 is being set all, the raw water tubes 2g of the discharge of filtrate separator is communicated with A, the distribution piping 38 that the microbial film filtrate district 37 in B pond is provided with, distribution piping 38 is separately positioned on 37 places, microbial film filtrate district, in 37 bottoms, microbial film filtrate district aeration tube 39 is set, aeration tube 39 the other ends pass through valve F18 separately, F19 is communicated with the high pressure gas pipeline 1g of the gas blower of aerating system; A, B pond are washed soaking box 41 left and right sides sidewalls at close membrance chemistry medicine MBR membrane bioreactor 15 (see figure 5)s are set.
For the reaction tank of the immersion MBR membrane bioreactor at the bottom of this routine flat pond, be provided with at the bottom of the flat pond and scrape the mud assembly; Scrape that the mud assembly comprises mechanical transmission mechanism 78, scrapes mud car 71, tow 73, Driving-mud Pump 79 and control stopper; Mechanical transmission mechanism comprises electric reducer 87, drives arbor wheel 82, bearing support 83,90 and driven arbor wheel 77, and the length direction both sides utilize bearing support to be provided with respectively and drive arbor wheel 82 and driven arbor wheel 77 at the bottom of flat pond; The shaft extension that drives arbor wheel 82 goes out to react pool wall 85 and uses sealing member 84 sealings, and the axle head that stretches out that drives arbor wheel 82 utilizes shaft coupling 86 and electric reducer 87 to connect, and the pedestal of electric reducer 87 is fixed on basic 88; Scraping mud car 71 comprises and scrapes mud frame 72, cleaning shoe 69, castor 70 and axle, castor 70 is bound up on by axle and scrapes mud frame 72, scrape mud frame 72 and be rectangle, about two cleaning shoes 69 be symmetrical set and scraping on mud frame 72 and the structural uprights 72a, the Ping Chi baseplane engagement of castor 70 and reaction tank 40; Tow 73 1 ends are fixed on the left end of scraping mud car 71, the tow the other end passes driven arbor wheel 77 and is fastened in mid-game 80 between left side dish 89 that drives arbor wheel and mid-game 80, it twines length of run above length direction two lateral extents at the bottom of the flat pond, and the back continues to be fixed on the right-hand member of scraping mud car 71 after winding is stretched out between mid-game 80 and the right dish 81; Two Driving-mud Pump 79 are separately positioned on length direction both sides at the bottom of the flat pond, and the spoil disposal slurry of Driving-mud Pump 79 is communicated with sludge thickener 11 by conduit.
All the other are substantially the same manner as Example 1 for present embodiment.
Shown that in Fig. 6 the present invention adopts the system flow embodiment 6 of filtrate separator; Present embodiment is on the system-based of the purifier of Fig. 5, between the reaction tank of two immersion MBR membrane bioreactors filtrate separator 5 is set.Be communicated with in the A of two immersion MBR membrane bioreactors, filtrate separator 5 bottoms between the B reaction tank 16 and 13.All the other are substantially the same manner as Example 5 for present embodiment.
Obviously, in all embodiment of the present invention, the relevant technologies feature can reasonably exchange and omit in the rights protection scope.
Claims (10)
1, the purifier and the system of the combination of a kind of separator and immersion membrane bioreactor, purifier and system comprise immerseable hollow-fiber membrane bioreactor (being called for short the MBR membrane bioreactor), former water, aerating system, separator, process system flow process and pipeline, water body containment system, chemical rinse-system and sequence control system; It is characterized in that, this purifier is provided with at least a pair of (A and B) MBR membrane bioreactor, every pair of MBR membrane bioreactor comprises at least one immerseable hollow fiber film assembly; Each MBR membrane bioreactor is immersed in the reaction tank of water body containment system formation, the casing of reaction tank for opening wide; Sanitary sewage enters the equalizing tank of purifier, and connecting between the raw water tubes of the raw water pump of equalizing tank and reaction tank is communicated with at least one separator; One of them separator adopts the filtrate separator, and the filtrate separator comprises closed box, grills, raw water tubes, emptying water pipe, row's recoil water pipe, recoil tracheae and filter material layer; Filtrate separator bottom is provided with permeable hole and can stops the grills that the filtrate of larger particles degree does not run off, and the filtrate of absorption is filled on grills top, and this filtrate is filled 30%～70% of filtrate separator internal box volume total height; A port of raw water tubes enters the equal stringing of former water on the top of filtrate separator internal adsorption filtrate, the equal stringing of this former water is arranged on the upper surface of a little higher than filter material layer, and be Z place apart from the degree of depth on the casing top of sealing, another port of raw water tubes is by the raw water pipeline of raw water pump connection upstream; A port of emptying water pipe is communicated with the water distribution mouth of pipe of the emptying water pipe of grills bottom in the filtrate separator, and the another port of emptying water pipe is communicated with the reaction tank that each water body containment system constitutes by the valve of coupling respectively; A port of recoil tracheae is communicated with row's water purifying water distribution mouth of pipe of grills in valve (F2) and the filtrate separator, and another port of recoil tracheae is communicated with the high pressure gas pipeline of the gas blower of aerating system; Row's recoil pipe inlet is arranged on the closed box top, and row's recoil water pipe is communicated with the equal stringing that refluxes by air valve F3.
2, the system of the purifier of separator according to claim 1 and immersion membrane bioreactor combination, it is characterized in that, the dissolved air flotation device (21) of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, the dissolved air flotation device comprises unlimited casing, bubble generation head, raw water tubes, receipts pure water pipe, muddy water vent pipe and turbidity detector; Dissolved air flotation device bottom is provided with the bubble generation head, and another port that the bubble generation head is taken over is communicated with the high pressure gas pipeline of the gas blower of aerating system by valve (F15); Dissolved air flotation device top is provided with overflow weir; A port receiving pure water pipe is arranged on the top of rectangular box in the dissolved air flotation device, the port upper tube wall of this receipts pure water pipe is h apart from the lower height of overflow weir (22) mouth, and the another port of receiving pure water pipe is communicated with the inlet of downstream filtrate separator (5) raw water tubes by raw water pump; The bottom land of overflow weir is communicated with the mouth of pipe of an end of muddy water vent pipe, and the mouth of pipe of the other end of muddy water vent pipe is communicated with the mud thickener; At the bottom of the distance overflow crest of weir degree of depth k transmitter of turbidity detector is set, the port upper tube wall distance that this sensor location is higher than the emptying water pipe is G, h=k+G; A port of raw water tubes enters bottom distribution nozzle in the dissolved air flotation device, and another port of raw water tubes is communicated with the raw water pipeline of upstream.
3, the system of the purifier of separator according to claim 1 and 2 and immersion membrane bioreactor combination, it is characterized in that, the inclined tube separator (28) of between the connection raw water tubes of the raw water pump of equalizing tank and filtrate separator, connecting, inclined tube separator (28) comprises unlimited casing (29), grills (31), raw water tubes (2i), receives pure water pipe (24), row's mud valve (F15) and inclined tube (30); Casing (29) bottom is provided with grills (31), and inclined tube (30) is filled on grills (31) top; A port of raw water tubes (2i) enters grills bottom distribution nozzle (27) in the inclined tube separator, and another port of raw water tubes is communicated with equalizing tank (3) by raw water pump (2b); Raw water pipeline (2i) is communicated with dosing pump (33) high-pressure outlet, and dosing pump (33) low-pressure inlet is communicated with flocculation agent medicinal cupping (32); A port receiving pure water pipe (24) is arranged on the top that the inclined tube separator is filled inclined tube, and the another port of receiving pure water pipe (24) is communicated with raw water tubes (2g) inlet of downstream separator by raw water pump; A port of row's mud valve (F15) is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve (F15) is communicated with sludge thickener (11) by pipeline.
4, the system of the purifier of separator according to claim 1 and immersion membrane bioreactor combination, it is characterized in that, the raw water pump of equalizing tank with inclined tube/dissolved air flotation device (34) is set between the raw water tubes being communicated with of filtrate separator, inclined tube/dissolved air flotation device (34) comprises unlimited casing (35), bubble generation head (36), the turbidity detector, grills (31), raw water tubes (2i), receive pure water pipe (24), row's muddy water pipe (23), row's mud valve (F17) and inclined tube (30), the rectangular box (35) of inclined tube/dissolved air flotation device is divided into inclined tube segregation section and air supporting segregation section up and down, inclined tube segregation section is in the bottom, the dissolved air flotation section is on top, two ends are the series connection of head and the tail order up and down, the dissolved air flotation pars infrasegmentalis is provided with bubble generation head (36), and another port that bubble generation head (36) is taken over is communicated with the high pressure gas pipeline (1g) of the gas blower of aerating system by valve (F16); Dissolved air flotation section top is provided with overflow weir (22); A port receiving pure water pipe (24) is arranged on the left side of the middle and upper part of rectangular box in the dissolved air flotation section, the port upper tube wall of this vent pipe is h apart from the lower height of overflow crest of weir, and the another port of receiving pure water pipe (24) is communicated with the inlet of the raw water tubes (2g) of downstream filtrate separator by raw water pump; The bottom land of overflow weir (22) is communicated with the mouth of pipe of an end of row's muddy water pipe (23), and the mouth of pipe of the other end of row's muddy water pipe (23) is communicated with the mud thickener; Inclined tube segregation section bottom is provided with grills (31), fills inclined tube (30) between grills (31) top and the bubble generation head; A port of raw water tubes (2j) enters the distribution nozzle (27) of rectangular box in the inclined tube segregation section, and another of raw water tubes (2j) is communicated with equalizing tank (3) by raw water pump (2b); Raw water pipeline (2j) is communicated with dosing pump (33) high-pressure outlet, and dosing pump (33) low-pressure inlet is communicated with flocculation agent medicinal cupping (32); A port of row's mud valve (F17) is arranged on the bottom that the inclined tube separator is filled inclined tube, and the another port of row's mud valve (F17) is communicated with sludge thickener (11) by pipeline; At the bottom of the distance overflow crest of weir degree of depth k transmitter of turbidity detector is set, the port upper tube wall distance that this sensor location is higher than the emptying water pipe is G, h=k+G.
5, according to the system of the purifier of claim 1 or 2 or 3 or 4 described separators and immersion membrane bioreactor combination, it is characterized in that, the preceding raw water pump of port that enters the filtrate separator adopts the air-flow water-jet pump, and air-flow water-jet pump (2) comprises high pressure gas nozzle (65), the adapter of former water inlet (64), vacuum chamber (62) and dilating catheter (61); Vacuum chamber (62) is hollow cylinder thin-walled tube, and former water inlet is taken over (64) one ends and is communicated with raw water tubes (2g), and former water inlet is taken over (64) the other end and is communicated with thin-walled tube (62); Dilating catheter (61) is the circular cone thin-walled tube; The axis of high pressure gas nozzle (65), vacuum chamber (62) and dilating catheter (61) is concentric; Dilating catheter (61) is arranged in the vacuum chamber (62), and high pressure gas nozzle (65) is directly to the smaller diameter end of dilating catheter (61); Being connected with vacuum chamber (62) lower end and sealing than the larger diameter end outer wall of dilating catheter (61) also is communicated with the equal stringing of former water (6) by conduit (63), is connected on the tube wall of high pressure gas nozzle (65) and the vacuum chamber (62); The other end of high pressure gas nozzle (65) is communicated with the high pressure gas pipeline (1g) of the gas blower (1) of aerating system by valve (F1); Be communicated with row's recoil water pipe (4g) at the top of filtrate separator (5), row's recoil water pipe (4g) end is communicated with air valve (F3), air valve (F3) the other end is communicated with the equal stringing of backflow (4) in dissolved air flotation device or inclined tube/dissolved air flotation device or the equalizing tank inner chamber bottom water, or after crossing air valve by sealing, gas is threaded a pipe in the water of connected reaction pond bottom.
6, the purifier of separator according to claim 1 and immersion membrane bioreactor combination, it is characterized in that, in each reaction tank one side of soaking the MBR membrane bioreactor microbial film filtrate district is set, the distribution piping of microbial film filtrate and connection raw water tubes (2g) is set in microbial film filtrate district, microbial film filtrate (49) is laid on the hole pattern (48), hole pattern (48) utilizes web member to be fixed on the reaction pool wall, hole pattern (48) bottom is provided with aeration tube, and the aeration tube the other end is communicated with the high pressure gas pipeline of the gas blower of aerating system by valve; The raw water tubes of the discharge of filtrate separator is communicated with the distribution piping that microbial film filtrate district is provided with.
7, the purifier of hanging rotary biochemical reactor according to claim 1, it is characterized in that, described chemical rinse-system comprises that chemical medicine is washed subsystem and the MBR membrane bioreactor moves and lifting machine, it is between the reaction tank (16) that soaks each MBR membrane bioreactor and (13) the membrance chemistry medicine to be set to wash soaking box (41) that the chemistry medicine is washed subsystem, the chemistry medicine is washed soaking box (41) top physic liquor intake tube (42) is set, physic liquor intake tube is communicated with the high-pressure side to spray pump (45), the low pressure end of giving spray pump (45) is respectively by series washing soup hold tank valve and coupling thereof and that be communicated with bottom, the chemistry medicine is washed soaking box (41) bottom and is communicated with emptying valve (F24) respectively and returns drug liquid tube (43), returns drug liquid tube (43) the other end by drain pump (44), valve separately is communicated with the washing soup hold tank top of coupling; It is on each top of soaking the reaction tank of MBR membrane bioreactor crane beam to be set that described MBR membrane bioreactor moves with the lifting assembly, crane beam is fixed on reaction pool wall, the foundation of civil work by portalframe, crane beam is provided with the lifting machine of the portable MBR membrane bioreactor of coupling, move with lifting machine be market sale move horizontally electric bicycle and vertical electric hoist associated plant.
8, the purifier of separator according to claim 1 and immersion membrane bioreactor combination is characterized in that, between the reaction tank of two immersion MBR membrane bioreactors separator is set.
9, purifier according to claim 6 or 7 or 8 described separators and immersion membrane bioreactor combination, it is characterized in that, be clipped in two A that soak the MBR membrane bioreactor, chemical medicine between B reaction tank (16) and (13) is washed soaking box (41) bottom and is communicated with, can regard as like this by A, the B reaction tank constitutes same Da Chi (40), near this Da Chi (40) left and right sides wall microbial film filtrate district (37) is being set all, the raw water tubes of the discharge of filtrate separator (2g) is communicated with A, the distribution piping (38) that the microbial film filtrate district (37) in B pond is provided with, distribution piping (38) is separately positioned on microbial film filtrate district (37) and locates, in bottom, microbial film filtrate district (37) aeration tube (39) is set, aeration tube (39) the other end is communicated with the high pressure gas pipeline (1g) of the gas blower of aerating system by valve; A, B pond are washed soaking box (41) left and right sides sidewall at close membrance chemistry medicine MBR membrane bioreactor (15) are set.
10, the purifier of separator according to claim 1 and immersion membrane bioreactor combination is characterized in that, for the reaction tank of the immersion MBR membrane bioreactor at the bottom of this routine flat pond, is provided with at the bottom of the flat pond and scrapes the mud assembly; Scrape that the mud assembly comprises mechanical transmission mechanism, scrapes the mud car, tow, Driving-mud Pump and control stopper; Mechanical transmission mechanism comprises electric reducer, drives arbor wheel, bearing support and driven arbor wheel, and the length direction both sides utilize bearing support to be provided with respectively and drive arbor wheel and driven arbor wheel at the bottom of flat pond; The shaft extension of driving arbor wheel goes out to react pool wall and seals with sealing member, and the axle head that stretches out that drives arbor wheel utilizes shaft coupling and electric reducer to connect, and the pedestal of electric reducer is fixed on the basis; Scrape the mud car and comprise and scrape mud frame, cleaning shoe, castor and axle, castor is bound up on by axle and scrapes on the mud frame, and scraping the mud frame is rectangle, about two cleaning shoes be symmetrical set and scraping on the mud frame, mesh the Ping Chi baseplane of castor and reaction tank; Tow one end is fixed on the left end of scraping the mud car, the tow the other end passes driven arbor wheel and is fastened in mid-game between left side dish that drives arbor wheel and mid-game, it twines length of run above length direction two lateral extents at the bottom of the flat pond, and the back continues to be fixed on the right-hand member of scraping the mud car after winding is stretched out between mid-game and the right dish; Two Driving-mud Pump are separately positioned on length direction both sides at the bottom of the flat pond, and the spoil disposal slurry of Driving-mud Pump is communicated with sludge thickener by conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710056769 CN101033107A (en) | 2007-02-12 | 2007-02-12 | Separator and immersion membrane bioreactor combined water purifying device and system |
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| CN 200710056769 CN101033107A (en) | 2007-02-12 | 2007-02-12 | Separator and immersion membrane bioreactor combined water purifying device and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830607A (en) * | 2010-05-24 | 2010-09-15 | 哈尔滨工程大学 | Alternate two-stage aerobic membrane bioreactor |
| CN101851034A (en) * | 2010-06-08 | 2010-10-06 | 河海大学 | Small automatic multi-stage oil-containing waste water treating device |
| CN102173544A (en) * | 2011-03-25 | 2011-09-07 | 南通京源水工自动化设备有限公司 | Hydraulic reclaimed water recycling device |
| CN102190405A (en) * | 2011-03-25 | 2011-09-21 | 南通京源水工自动化设备有限公司 | Low-energy reuse device for cleaning reclaimed water by using membrane |
| CN103663820A (en) * | 2013-12-30 | 2014-03-26 | 大连宏博水科技有限公司 | Air-flotation and membrane-filtration purification system |
| CN109868863A (en) * | 2019-03-27 | 2019-06-11 | 辽宁科技大学 | Water rinses toilet device in a kind of utilization |
| CN111285506A (en) * | 2020-03-30 | 2020-06-16 | 无锡市政设计研究院有限公司 | Pretreatment system and pretreatment method for wastewater membrane treatment process |
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2007
- 2007-02-12 CN CN 200710056769 patent/CN101033107A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830607A (en) * | 2010-05-24 | 2010-09-15 | 哈尔滨工程大学 | Alternate two-stage aerobic membrane bioreactor |
| CN101851034A (en) * | 2010-06-08 | 2010-10-06 | 河海大学 | Small automatic multi-stage oil-containing waste water treating device |
| CN101851034B (en) * | 2010-06-08 | 2012-05-23 | 河海大学 | Small automatic multi-stage oil-containing waste water treating device |
| CN102173544A (en) * | 2011-03-25 | 2011-09-07 | 南通京源水工自动化设备有限公司 | Hydraulic reclaimed water recycling device |
| CN102190405A (en) * | 2011-03-25 | 2011-09-21 | 南通京源水工自动化设备有限公司 | Low-energy reuse device for cleaning reclaimed water by using membrane |
| CN102173544B (en) * | 2011-03-25 | 2013-02-13 | 南通京源水工自动化设备有限公司 | Hydraulic reclaimed water recycling device |
| CN103663820A (en) * | 2013-12-30 | 2014-03-26 | 大连宏博水科技有限公司 | Air-flotation and membrane-filtration purification system |
| CN109868863A (en) * | 2019-03-27 | 2019-06-11 | 辽宁科技大学 | Water rinses toilet device in a kind of utilization |
| CN109868863B (en) * | 2019-03-27 | 2023-11-03 | 辽宁科技大学 | Device for flushing toilet bowl by using reclaimed water |
| CN111285506A (en) * | 2020-03-30 | 2020-06-16 | 无锡市政设计研究院有限公司 | Pretreatment system and pretreatment method for wastewater membrane treatment process |
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