CN203960013U - A kind of intermediate water reuse system based on membrane bioreactor - Google Patents
A kind of intermediate water reuse system based on membrane bioreactor Download PDFInfo
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- CN203960013U CN203960013U CN201420388797.2U CN201420388797U CN203960013U CN 203960013 U CN203960013 U CN 203960013U CN 201420388797 U CN201420388797 U CN 201420388797U CN 203960013 U CN203960013 U CN 203960013U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 221
- 239000012528 membrane Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 241000276438 Gadus morhua Species 0.000 claims abstract description 7
- 235000019516 cod Nutrition 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000015556 catabolic process Effects 0.000 claims abstract description 4
- 230000004059 degradation Effects 0.000 claims abstract description 4
- 238000006731 degradation reaction Methods 0.000 claims abstract description 4
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000004519 grease Substances 0.000 claims abstract description 3
- 238000001556 precipitation Methods 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- 238000001223 reverse osmosis Methods 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 9
- 229910052904 quartz Inorganic materials 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 5
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- RECVMTHOQWMYFX-UHFFFAOYSA-N oxygen(1+) dihydride Chemical compound [OH2+] RECVMTHOQWMYFX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 description 9
- 239000010865 sewage Substances 0.000 description 9
- 238000005429 turbidity Methods 0.000 description 8
- 238000010612 desalination reaction Methods 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 238000000108 ultra-filtration Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
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- 238000002203 pretreatment Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
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- 229920005989 resin Polymers 0.000 description 2
- 235000019600 saltiness Nutrition 0.000 description 2
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- 238000009287 sand filtration Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
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- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
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- 238000001728 nano-filtration Methods 0.000 description 1
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- 230000001839 systemic circulation Effects 0.000 description 1
- 230000001702 transmitter Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model relates to middle water recycling field, particularly relates to a kind of intermediate water reuse system based on membrane bioreactor.Described system comprises oil trap, settling tank, equalizing tank, oxygen compatibility pool, biological respinse membrane cisterna, recycle pump and middle water reuse case; Described oil trap connects settling tank, after the grease thing in filtered wastewater and larger individual particles thing, processes water and enters settling tank; Described settling tank is connected with equalizing tank, and the foreign material in precipitation process water also regulate ammonia nitrogen in water level degradation water; And connect oxygen compatibility pool, biological respinse membrane cisterna; Described processing water flows into oxygen compatibility pool and biological respinse membrane cisterna carries out chemical oxygen demand COD in aeration minimizing water, and biological respinse membrane cisterna filters and produces water; Described oxygen compatibility pool and biological respinse membrane cisterna are provided with water circulating pump; Water reuse case during described biological respinse membrane cisterna connects.The utility model is used biological degradation method, membrane technology, and product water water quality is good, meets more, higher water demand.
Description
Technical field
The utility model relates to the recycling field of middle water, particularly relates to a kind of intermediate water reuse system based on membrane bioreactor.
Background technology
The shortage of water resources and the environmental protection pressure of blowdown, restricting the development of China's economic society.Therefore, the numerous and confused trial such as each industrial enterprise, municipal wastewater factory starts to carry out advanced treatment of wastewater and middle water reuse, and to realize sewage recycling utilization, better protection of the environment, solves water problems.
For middle water reuse, the basic basis of first considering is the field of employment of reuse.Industrial enterprise's water occasion comprises: recirculated cooling water, feedwater, process water, wash-down water etc.Municipal water use mainly comprises: tap water, greening water, landscape water etc.These water water quality standard generally all comprise two main, comprehensive indexs: turbidity/suspended solids (ss), saltiness (TDS).
The process of using embrane method technology of middle water recycle mainly to comprise is divided into two steps:
1) turbidity removal, removal suspended particle: ultra-filtration membrane, microfiltration membrane, the biological floe of sewage disposal remnants, mushroom etc. are held back, use clarification of water, can reach reuse or further process reuse.Membrane technique for turbidity removal comprises: hollow fiber ultrafiltration membrane, membrane bioreactor (MBR) etc.
2) desalination: reverse osmosis membrane RO or nanofiltration NF, the water outlet of clarification is carried out to film desalination, be divided into two strands of dense water (discharge) and fresh water (reuse).
Utility model content
The purpose of this utility model is, a kind of intermediate water reuse system based on membrane bioreactor is provided.
The technical solution of the utility model is as follows:
An intermediate water reuse system based on membrane bioreactor, described system comprises oil trap, settling tank, equalizing tank, oxygen compatibility pool, biological respinse membrane cisterna, recycle pump and middle water reuse case;
Described oil trap connects settling tank, after the grease thing in filtered wastewater and larger individual particles thing, processes water and enters settling tank;
Described settling tank is connected with equalizing tank, and the foreign material in precipitation process water also regulate ammonia nitrogen in water level degradation water; And connect oxygen compatibility pool, biological respinse membrane cisterna;
Described processing water flows into oxygen compatibility pool and biological respinse membrane cisterna carries out chemical oxygen demand COD in aeration minimizing water, and biological respinse membrane cisterna filters and produces water; Described oxygen compatibility pool and biological respinse membrane cisterna are provided with water circulating pump;
Water reuse case during described biological respinse membrane cisterna connects.
Further, described system also comprises a biological reaction plate film, and described biological respinse flat sheet membrane is installed on carries out water ion filtration in biological respinse membrane cisterna.
Further, described system is also connected with pure water treatment facility, and described pure water treatment facility comprises:
Quartz filter, activated charcoal filter, accurate filter, high-pressure pump, reverse osmosis membrane and pure water box;
Water in described middle water reuse case passes through quartz filter successively, activated charcoal filter, accurate filter, the impurity of water and the pigment in water in quartz filter and activated charcoal filter filtration and absorption; Larger ion and heavy metal ion in accurate filter isolated water;
High-pressure pump is pressurizeed and is made water pass through to flow into pure water box after reverse osmosis membrane hole.
Further, described system also comprises a PLC Controlling System level controlling box, the enforcement of the whole flow process of Controlling System.
Further, described middle water reuse case is connected to domestic water district, landscape pond, toilet is provided, waters flowers and use mixedly the water of water spot.
Further, described system also comprises and also comprises a dosing tank, is connected with biological respinse membrane cisterna, and the processing water dosing that biological respinse membrane cisterna is flowed out is disinfected.
The beneficial effects of the utility model are:
1, use membrane technology, product water water quality is good, meets more, higher water demand;
2, membrane technique is contained several functions, comprises turbidity removal, the desalination system of different removal efficiencies, and application choice is wider;
3, high salt timesharing, embrane method cost is better than resin method;
4, mould material cost declines, and technical stability improves, and makes embrane method become general.
Accompanying drawing explanation
Fig. 1 intermediate water reuse system structure iron based on membrane bioreactor of the present utility model.
Fig. 2 is the utility model pure water treatment facility structure iron.
Wherein, 1-oil trap, 2-settling tank, 3-equalizing tank, 4-oxygen compatibility pool, 5-biological respinse membrane cisterna, 6-recycle pump, water reuse case in 7-, 8-biological respinse flat sheet membrane, the newborn pure water treatment facility of 9-, 10-domestic water district, 11-dosing tank, the active dirty mud of 12-pond, 13-topping-up pump, 14-activated charcoal filter, 15-resin softening filter, 16-accurate filter, 17-one-level high-pressure pump, 18-first-stage reverse osmosis film, 19-intermediate water tank, 20-secondary high-pressure pump, 21-PH setter, 22-two-pass reverse osmosis film, the newborn pure water box of 23-, 24-cleaning system.What arrow was indicated is the flow direction of processing water.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is further described.
Process selection: the advanced treatment to general biochemical second pond water outlet, the most frequently used treatment step filters exactly, and the biological floe of second pond water outlet and colloidalmaterial can be trapped in above filtrate, reduces SS and the turbidity of water outlet.Advanced treatment to waste water, often adopts sand filtration and activated carbon filtration.Sand filtration is removed SS, colloidalmaterial as being mainly used in, and gac can Filtration Adsorption organism, heavy metal class, oxidizing substance.During for water outlet ss, there is fluctuation, for guaranteeing to filter, can stablize long-time running, can set up the measures such as coagulating sedimentation to water inlet, to extend the recoil cycle of strainer.
Through filtering the SS of water outlet, can be reduced to < 5mg/L, most large particle diameter colloidal solids also can be removed, but the particulate being less than below 0.1um is still partly existed, and to the operation of RO film, are still pollutions.Therefore, be necessary carrying out pre-filtering before RO film.The filtration particle diameter of tubular fibre membrane ultrafiltration be 0.01um to 0.2um, the delivery turbidity that sees through in principle tubular fibre membrane ultrafiltration is 0, the bacterium in trap water, prevents the bacterial contamination of rear class film simultaneously.And the rate of recovery of system is high, can reach more than 90%.Therefore tubular fibre membrane ultrafiltration, to RO film, is a good pre-treatment.
Reverse osmosis (RO) film is an ideal chose for desalination.The NaCl rejection of standard reverse osmosis membrane is more than 99%, and the product water that sees through in principle film only has pure water.More thorough to holding back of polyvalent ion, organism etc.Reverse osmosis system generally reaches more than 95% the ratio of desalinization of sewage desalting treatment, and to COD, BOD clearance, more than 85%, the water rate of recovery is 70%～85%, produces water quality stabilizing reliable.The indexs such as water outlet saltiness, hardness, turbidity, COD, SS are extremely low, generally can direct reuse or further desalination as uses such as pure water, boiler feedwaters.
Reverse osmosis membrane is due to the general rolled film structure that adopts, for guaranteeing the steady running normally and efficiently of reverse osmosis system, sewage needs to adopt certain pre-treatment before entering reverse osmosis membrane, remove particle insoluble in waste water, colloid etc., to meet the requirement of feed water by reverse osmosis SDI < 3, and reduction causes the ionic concn of face fouling, idiozome etc.
Membrane bioreactor (Membrane Biological Reactor is called for short MBR) technique is by improving existing aerobic treatment system, improves water quality treatment and realizes pretreated.MBR technique has following advantage:
(1) MBR, for the shortcoming of traditional activated sludge process, holds back completely to mud, has improved some organic residence time of difficult explanation, can significantly reduce the COD of water outlet;
(2) by film, hold back, improved the sludge concentration in Aerobic Pond, reduce the loss of mud, preferably anti impulsion load;
(3), because MBR effluent quality turbidity is extremely low, need not process again can directly enter follow-up RO film system and carry out desalination;
(4) due to water outlet COD very low (expectation can reach 40～6mg/L), the dense water of follow-up like this RO film system can directly discharge conventionally, does not need to consider that dense water processes problem again.
The Main Basis that these Technologies are selected, combined is: the water quality situation of (1) enterprise waste discharge; (2) treatment scale; (3) reuse object reaches after namely processing requires water quality; (4) comparison of Technical Economy.
Unit treatment process is be equivalent to a certain amount of different pollutent and arrange, and unit treatment process is assisted mutually, has jointly completed the removal to pollutent, makes purification of waste water reach the object of reuse.Certainly, might not all need the flow process grown so for Treatment for Reuse, unit technique can combine flexibly, as long as can complete processing requirement separately, just can select suitable technique.
Middle water reuse project case:
MBR system work process:
Note: sewage working shaft, blower fan, suction pump, MBR pond recycle pump (the oxygen cycle pump of holding concurrently), middle water working shaft can manually boot separately respectively (joining switch).Suction pump is accelerated and be 10 seconds deceleration time.In MBR system, having 3 electronic grout flow meters will pass to PLC shows.On pure water equipment, having 1 electronic grout flow meter will pass to PLC shows.System power is passed to PLC and is shown.
Before system is carried out to sludge acclimatization, need to be clean to all foreign material cleanings in Sewage treatment systems.The all power-equipments of system all must possess manually and automatic mode master mode.In each treating pond, inject clear water, under manual mode, drive starting outfit, guarantee that each equipment operation is normal.Emptying equalizing tank clear water drops into the kind mud after screening according to the ratio of 5kg/m3 in oxygen compatibility pool, opens sludge circulation pump, regularly adds nutritive salt.Sludge part overflow after breeding enters MBR pond.When treating that MBR pond sludge concentration reaches 3kg/m3, MBR system can enter automatic running status.
I, concise and to the point step:
The normal operation of A, whole plant
The normal operation in B, MBR pond
The cleaning process of C, MBR
II, concrete steps:
The A the first step, equalizing tank has water level sensor to sense water yield 20cm, opens into sewage working shaft water is got in oxygen compatibility pool; To oxygen compatibility pool lower curtate.The water level overflow after 170cm that reach a certain height enters MBR pond.MBR pool water level inductor block senses, in MBR pond, the water yield starts (while starting systematic water level (1.7m)): blower fan, MBR pond recycle pump (the oxygen cycle pump of holding concurrently) be after 60 seconds, then accelerates to start suction pump and produce water; Blower fan is opened and aeration suction pump is carried out in MBR pond is produced water (system is normally worked).Middle cistern water level inductor block senses that the water yield is more than ordinary water-level 15cm, and in startup, cistern water supply pump is to toilet flushing water and use mixedly water spot and supply water.(but by pressure transmitter, the pressure that is greater than 2KG is passed to PLC when working as toilet and using mixedly water spot without water, PLC provides instruction: working shaft quits work, during PLC shows, water working shaft stops) adopting automatic pump to control, when if the water yield arrives safe water port water level 39cm, water can be arranged Fs3 by check valve from safe water port and go out to landscape pond, and check valve Fs3 prevents that landscape pond water is back in foul water tank.(the sump pump band liquid level meter of equalizing tank).
B, when equalizing tank water level during to low-water level (0.1m) water level sensor signal is passed to PLC (vision-control pond low-water level, sewage working shaft stops); MBR pool water level during to low-water level (1.6m) water level sensor signal is passed to PLC, PLC provides instruction: suction pump, blower fan, recycle pump quit work.System now has equalizing tank sump pump, and middle cistern water supply pump work is supplied water with water spot at any time.System is in automatic mode, and during oxygen compatibility pool water level 190cm, sump pump stops, other normal mode,
When equalizing tank water level is during to working water level (0.25m), system starts: A.
Second step: (Fd1, Fd2 often open, and Fd3, Fd4 are normally closed) in service under system automatic mode, every product water 8 minutes, suction pump decelerates to 0 (stopping 2 minutes).Accelerate to again 2000 transhipment row 8 minutes.(every 5 cycle backwashes once).All the other times only aeration wash away, not backwash.
Backwash procedure: suction pump decelerates to 0 and accelerates to 1000 transhipment row 1 minute again.Suction pump decelerates to 0 o'clock Fd1 pass Fd3 and opens, after 1 second, Fd2 closes Fd4 and opens that (flow control is at 100L/H pressure 1Mpa, if superpressure " pressure > 1Mpa " system alarm quits work, prompting backwash superpressure, when " pressure < 1Mpa ", system starts again).MBR film is carried out to backwash 1 minute.Suction pump decelerates to 0-and accelerates to 2000 again and turn (10 seconds).Suction pump decelerates to 0 o'clock Fd4 pass Fd2 and opens, and Fd1 opens Fd3 and closes work 8 minutes.The cycle operation of system automatic mode.(sewage working shaft, blower fan, suction pump, MBR pond recycle pump (oxygen compatibility pool recycle pump), middle water working shaft are all in automatic mode state)
Note: send while being shown as-0.2 when vacuum pressure becomes, when PLC detects the signal of pressure unit, system carries out MBR film to clean 1 minute: start backwash procedure
During 1000 (approximately 15 days) rear backwashes of systemic circulation work backwash, dosing sterilization backwash is once carried out in dosing simultaneously
The 3rd step: the water level sensor when warning water level 5cm of the water level in central water tank is passed to PLC signal; PLC provides instruction: start the magnetic valve Fd5 (check valve works, and tap water can not be back in middle water tank) in (but not opening) tap water pipe line.When needing water with water spot, water flow sensing unit is given to PLC signal, and during the low 1KG of pressure of supply water, PLC provides instruction: on the pipeline of municipal tap water, magnetic valve Fd5 opens, and starts suction pump simultaneously, with water spot, is supplied water.
Water level water level 15cm inductor block in ordinary water-level central water tank is passed to PLC signal; PLC provides instruction: close the magnetic valve Fd5 on the pipeline of municipal tap water.Intermediate water tank system is carried out normal water supply.If (now use water spot without water, pressure do not reach pressure of supply water do not start in water working shaft " pump is automatic pump ").
The 4th step: the safe water port in oxygen compatibility pool, MBR pond is first discharged in equalizing tank, in equalizing tank in safe water port be discharged to safe blowdown water channel.(can there is not this kind of situation under normal circumstances)
The 5th step: when system will be rinsed MBR film, if system detects in pure water box when water level is lower than barrier line (0.2m), system quits work, and with alarm pure water box water shortage, asks moisturizing.While being greater than (0.2m) in pure water equipment water processed to the water yield, system works on.
The 6th step: newborn pure water equipment reverse osmosis: start, close
Start newborn pure water equipment reverse osmosis equipment, after opening that entering water electromagnetic valve controller Fd6 starts, topping-up pump starts, finishing the work, after startup controller 2 has been worked, switching value signal is passed to PLC starting P1, when middle Water in Water Tank letter starts P2 when ordinary water-level is, start HP setter simultaneously, when HP conditioning agent during in low-water level level two and HP setter quit work, give the alarm simultaneously and require to add HP conditioning agent.Intermediate water tank water level P2 when low-water level stops, HP setter stops.When newborn pure water box water is full, P2 stops, HP setter stops.When controller 1, controller 2 cleaning, P1 stops, startup after cleaning completes.Excessive low water level protection 1 lack of water P1 stops, water conservation 2 lack of water P2 (lack of water switching value).Electronic grout flow meter is passed to PLC (4mA-20mA) flow.Conductivitimeter is passed to PLC newborn pure water specific conductivity, to producing water water quality, carries out Real-Time Monitoring.When producing discharge, product water water quality conductive over maximum set value, system is returned medicine cleaning.Start cleaning system, cleaned rear system and entered normal work.
Claims (6)
1. the intermediate water reuse system based on membrane bioreactor, described system comprises oil trap, settling tank, equalizing tank, oxygen compatibility pool, biological respinse membrane cisterna, recycle pump and middle water reuse case;
Described oil trap connects settling tank, after the grease thing in filtered wastewater and larger individual particles thing, processes water and enters settling tank;
Described settling tank is connected with equalizing tank, and the foreign material in precipitation process water also regulate ammonia nitrogen in water level degradation water; And connect oxygen compatibility pool, biological respinse membrane cisterna;
Described processing water flows into oxygen compatibility pool and biological respinse membrane cisterna carries out chemical oxygen demand COD in aeration minimizing water, and biological respinse membrane cisterna filters and produces water; Described oxygen compatibility pool and biological respinse membrane cisterna are provided with water circulating pump;
Water reuse case during described biological respinse membrane cisterna connects.
2. a kind of intermediate water reuse system according to claim 1, is characterized in that: described system also comprises a biological reaction plate film, and described biological respinse flat sheet membrane is installed on carries out water ion filtration in biological respinse membrane cisterna.
3. a kind of intermediate water reuse system according to claim 1, is characterized in that, described system is also connected with pure water treatment facility, and described pure water treatment facility comprises:
Quartz filter, activated charcoal filter, accurate filter, high-pressure pump, reverse osmosis membrane and pure water box;
Water in described middle water reuse case passes through quartz filter successively, activated charcoal filter, accurate filter, the impurity of water and the pigment in water in quartz filter and activated charcoal filter filtration and absorption; Larger ion and heavy metal ion in accurate filter isolated water;
High-pressure pump is pressurizeed and is made water pass through to flow into pure water box after reverse osmosis membrane hole.
4. a kind of intermediate water reuse system according to claim 1, is characterized in that: described system also comprises a PLC Controlling System level controlling box, the enforcement of the whole flow process of Controlling System.
5. a kind of intermediate water reuse system according to claim 1, is characterized in that: described middle water reuse case is connected to domestic water district, landscape pond, toilet is provided, waters flowers and use mixedly the water of water spot.
6. a kind of intermediate water reuse system according to claim 1, is characterized in that: described system also comprises and also comprises a dosing tank, is connected with biological respinse membrane cisterna, and the processing water dosing that biological respinse membrane cisterna is flowed out is disinfected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986922A (en) * | 2015-07-16 | 2015-10-21 | 三达水（北京）科技有限公司 | Sewage reuse system and sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986922A (en) * | 2015-07-16 | 2015-10-21 | 三达水（北京）科技有限公司 | Sewage reuse system and sewage treatment method |
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