CN105347533A - System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane - Google Patents

System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane Download PDF

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Publication number
CN105347533A
CN105347533A CN201510866155.8A CN201510866155A CN105347533A CN 105347533 A CN105347533 A CN 105347533A CN 201510866155 A CN201510866155 A CN 201510866155A CN 105347533 A CN105347533 A CN 105347533A
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China
Prior art keywords
charcoal
water
pond
submerged ultrafiltration
mixing
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Inventor
刘鲁建
董俊
覃将伟
聂忠文
刘卫勇
熊蔚
方潇
张双峰
陈亮
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HUBEI JUNJI WATER TREATMENT CO Ltd
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HUBEI JUNJI WATER TREATMENT CO Ltd
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Priority to CN201510866155.8A priority Critical patent/CN105347533A/en
Publication of CN105347533A publication Critical patent/CN105347533A/en
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Abstract

The invention discloses a system and method for performing advanced treatment of sewage through a submerged ultrafiltration membrane. The system comprises a powder carbon mixing tank, a carbon and water pre-mixing pond, a submerged ultrafiltration membrane separation pond, an outflow water storage pond, a concentration precipitation pond and a pressing and filtering device. An external pressing type submerged membrane is arranged in the submerged ultrafiltration membrane separation pond, and the powder carbon mixing tank conveys powder active carbon to the submerged ultrafiltration membrane separation pond through a carbon adding pipe. Tail water of an industrial sewage treatment plant is conveyed into the carbon and water pre-mixing pond through a water inflow pipeline, and the tail water and carbon slurry flowing back through a return pipe in the submerged ultrafiltration membrane separation pond are subjected to carbon and water pre-mixing; part of water separated through the submerged ultrafiltration membrane separation pond is discharged through a water outflow pipe, and the other part of the water is stored in the outflow water storage pond; the carbon slurry in the carbon and water pre-mixing pond is conveyed into the concentration precipitation pond to be subjected to concentration and then is conveyed into the pressing and filtering device to be subjected to dewatering recovery. The sewage treatment technology is simple in technological process, high in automatic control degree, stable in treatment effect and capable of recycling active carbon for regeneration.

Description

One utilizes submerged ultrafiltration to carry out advanced sewage treatment system and method
Technical field
The invention belongs in advanced treatment of wastewater field, relate to a kind of advanced sewage treatment system and method, be specifically related to a kind of advanced sewage treatment system and the method that adopt powder electroless plating and submerged membrane separation and combination.
Background technology
Industrial sewage has the features such as colourity is dark, COD concentration is high, difficult degradation.Industrial sewage is still difficult to qualified discharge after routine biochemistry and chemical precipitation method process, needs to adopt further treatment technique to process further.And the tail water that the Industrial Waste Water Treatments factory of conventional secondary biochemical and chemical precipitation process discharges, usually have the characteristics such as difficult biochemical, difficult oxidation, difficult flocculation, traditional method is difficult to gather effect.Advanced oxidation as ozone oxidation good decolorizing effect, but removes COD ability; Fenton oxidation decoloring ability is strong, COD is effective in removal, but it is large to produce sludge quantity, and sludge disposal difficulty is large, and secondary pollution is serious; Membrane separation technique also fails effectively to solve due to fouling membrane and dense water handling problems; Deep biochemical technology needs with high-level oxidation technology in conjunction with coupling as BAF, cause that investment is large, technique controlling difficulty is large, operating performance is unstable, the domestic BAF successful case for large-scale industry advanced treatment of wastewater is rarely seen.
Powdered Activated Carbon has the features such as surface-area is large, adsorptive power is strong.Therefore, be widely used in the decolouring of the products such as food, medicine, monosodium glutamate chemical industry, impurity removal and purification, micro-pollution is removed in the deodorization of tap water technique, also can be used for the advanced treatment of waste water.
Because Powdered Activated Carbon is large to organic adsorptive power, adds more convenient, be widely used in tap water and Sewage advanced treatment, often use in environmental emergency process.In running water by disposal of depth, consumption is less, and large-scale application through engineering approaches example is few, generally disposablely adds, and Powdered Activated Carbon is not easy to recycle.
About the technology that Powdered Activated Carbon is separated with water, conventional has a series of traditional technology of coagulating sedimentation filtration, millipore filtration, filter-cloth filtering, filler filtration etc.Mainly add the dirty water pollutant of powder electroless plating, dosing coagulant polymerize aluminum chloride etc., catch Powdered Activated Carbon particle afterwards, then through filtering.Powdered Activated Carbon and water shorter for duration of contact, add concentration low, the Powdered Activated Carbon mud of formation contains a large amount of polymerize aluminum chlorides, is not easy reclaiming.
Although traditional separating technology technology maturation, but still exist a lot of not enough.As not high in: filtering accuracy (0.1-10 micron), causes the rejection of Powdered Activated Carbon lower; Easy blocking, backwash frequency is high and the backwash water yield large, causes operation energy consumption large; Go out water suspension content and turbidity is higher; For the situation that water fluctuation is larger, the not shock-resistant effluent quality that causes of system is unstable; Large by charcoal amount, complexes floor space is larger.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of advanced sewage treatment system and the method that adopt powder electroless plating and submerged membrane separation and combination.
The technical scheme that system of the present invention adopts is: one utilizes submerged ultrafiltration to carry out advanced sewage treatment system, it is characterized in that: comprise dust active carbon and join charcoal tank, charcoal water pre-mixing pond, submerged ultrafiltration separate tank, water outlet storage pond, concentrating and precipitating pond and filtering equipment;
Be provided with external-compression type submerged membrane in submerged ultrafiltration separate tank, described dust active carbon joins charcoal tank by adding charcoal pipe to described submerged ultrafiltration separate tank conveying powder gac; Industrial Waste Water Treatments plant tail water sends into described charcoal water pre-mixing pond by inlet channel, starches carry out the pre-mixing of charcoal water with the charcoal refluxed by return line in described submerged ultrafiltration separate tank; Mixed charcoal water is sent into submerged ultrafiltration separate tank through pipeline and is separated; The water separated through described submerged ultrafiltration separate tank is discharged by an outlet conduit part, another part is stored in described water outlet storage pond;
The charcoal slurry in described charcoal water pre-mixing pond is sent into concentrated rear the feeding in filtering equipment in described concentrating and precipitating pond by row's charcoal pipe and is carried out dewatering and recovery.
As preferably, described external-compression type submerged membrane adopts external-compression type tubular fibre to strengthen cortina, and membrane pore size is micron order, and film silk material is polyvinylidene difluoride (PVDF), film silk component film curtain and membrane module.
As preferably, described system is also configured with gas blower, described gas blower utilizes connecting tube to be connected with the boring aeration pipe arranged bottom charcoal water pre-mixing pond and submerged ultrafiltration separate tank respectively, stirs air source used for charcoal water pre-mixing pond and submerged ultrafiltration separate tank provide.
As preferably, described system is also configured with backwashing equipment, comprises backwashing pump, pneumavalve and magnetic flow meter; Described backwashing pump one end and described water outlet are stored up pond and are connected, and send water to carry out back flushing after the other end connects pneumavalve and magnetic flow meter successively by outlet conduit to described submerged ultrafiltration separate tank.
As preferably, described system is also configured with charcoal reclaim equiment, the charcoal slurry in described charcoal water pre-mixing pond by row's charcoal pipe send into dewater in described filtering equipment after utilize connecting tube to send in charcoal reclaim equiment to regenerate, finally utilize connecting tube to send into described dust active carbon and join recycle in charcoal tank.
As preferably, described Industrial Waste Water Treatments plant tail water sends into described charcoal water pre-mixing pond by inlet channel, inlet channel is configured with inlet channel pump, battery valve and magnetic flow meter; Described dust active carbon joins charcoal tank by adding charcoal pipe to described submerged ultrafiltration separate tank conveying powder gac, adds on charcoal pipe and is configured with METERING DIAPHRAGM PUMPS; Be connected with described charcoal water pre-mixing pond by return line in described submerged ultrafiltration separate tank, return line be provided with ball valve, circulating pipe pump and magnetic flow meter; The water that described submerged ultrafiltration separate tank is separated is discharged by an outlet conduit part, outlet conduit is configured with vacuum pressure gauge, pneumavalve and magnetic flow meter; The charcoal slurry in described charcoal water pre-mixing pond is sent in described filtering equipment by row's charcoal pipe and is dewatered, and row's charcoal pipe is provided with ball valve and pneumatic diaphragm pump.
The technical scheme that method of the present invention adopts is: a kind of method utilizing submerged ultrafiltration to carry out advanced treatment of wastewater, is characterized in that, comprise the following steps:
Step 1: add Powdered Activated Carbon;
Join to dust active carbon the Powdered Activated Carbon that charcoal tank adds certain metering, adopt Powdered Activated Carbon jet to suck and mix with water, configure certain density charcoal slurry, then squeeze in submerged ultrafiltration separate tank by METERING DIAPHRAGM PUMPS;
Step 2: charcoal water pre-mixing;
Industrial Waste Water Treatments plant tail water is flowed in charcoal water pre-mixing pond to starch with the charcoal refluxed by return line in described submerged ultrafiltration separate tank and fully mixes;
Step 3: charcoal absorption and charcoal water are separated;
Be provided with external-compression type submerged membrane in submerged ultrafiltration separate tank, sewage completes advanced treatment process through film silk;
Step 4: charcoal slurry precipitation concentration dehydration;
Charcoal slurry is sent into concentrating and precipitating pond from row's charcoal pipe that charcoal water pre-mixing pond end is arranged and is concentrated, and dense charcoal slurry drains into filtering equipment dehydration slurry through surge pump.
As preferably, in step 1, the metering of the Powdered Activated Carbon of dosage is 10 ~ 1000mg/L, and the charcoal slurry concentration be configured to is about 5%.
As preferably, the flow starched from the charcoal of described submerged ultrafiltration separate tank internal reflux in step 2 is 1 ~ 1.5 times that flows into tail water flow in charcoal water pre-mixing pond, and charcoal concentration about 5 ~ 100g/L after mixing, mixing time is 20 ~ 40min.
The inventive method has following feature and beneficial effect:
(1) in membrane cisterna, charcoal concentration is very high, in film case, Powdered Activated Carbon cumulative concentration is up to 5 ~ 100g/L, and a large amount of Powdered Activated Carbons mixes rapidly with water, stronger for water damping of shocks ability, better, gac utilising efficiency improves for adsorb organic compound pollutent and decolorizing effect;
(2) due to the autohension of Powdered Activated Carbon, a large amount of Powdered Activated Carbons, except planar water small molecular and medium molecule organism, also has encapsulation to polymer and suspended substance, thus not easily contamination and plugging ultra-filtration membrane, do not have traditional technology blockage problem.
(3) decrease the pollution of film, the flux of film compares large 3 times of traditional membrane bioreactor, and corresponding membrane cost of investment is original 30%, hydraulic detention time 1h, decreases structures and takes up an area;
(4) the discharge concentration of charcoal slurry can up to 3%, and concentrating and precipitating pond is taken up an area few, and dehydration facility is few, the recyclable regeneration of Powdered Activated Carbon.
(5) this Process for Effluent water conditioning, colourity is low, the feature that suspended substance is few.
(6) to have level of automation high for this technique, operation and operational management simple, large-scale engineeringization adopts modular assembly, safeguards to change convenient, and large-scale engineering practices simply.
Accompanying drawing explanation
Fig. 1: the system construction drawing of the embodiment of the present invention;
Fig. 2: the Method And Principle figure of the embodiment of the present invention.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Ask for an interview Fig. 1, one provided by the invention utilizes submerged ultrafiltration to carry out advanced sewage treatment system, comprises dust active carbon and joins charcoal tank, charcoal water pre-mixing pond, submerged ultrafiltration separate tank, water outlet storage pond, concentrating and precipitating pond, filtering equipment, gas blower, backwashing equipment, charcoal reclaim equiment and automatic control equipment; Be provided with external-compression type submerged membrane in submerged ultrafiltration separate tank, external-compression type submerged membrane adopts external-compression type tubular fibre to strengthen cortina, and membrane pore size is micron order, and film silk material is polyvinylidene difluoride (PVDF), film silk component film curtain and membrane module; Dust active carbon joins charcoal tank by adding charcoal pipe to submerged ultrafiltration separate tank conveying powder gac; Industrial Waste Water Treatments plant tail water sends into charcoal water pre-mixing pond by inlet channel, starches carry out the pre-mixing of charcoal water with the charcoal refluxed by return line in submerged ultrafiltration separate tank; Gas blower utilizes connecting tube to be connected with the boring aeration pipe arranged bottom charcoal water pre-mixing pond and submerged ultrafiltration separate tank respectively, stirs air source used for charcoal water pre-mixing pond and submerged ultrafiltration separate tank provide.Mixed charcoal water is sent into submerged ultrafiltration separate tank through pipeline and is separated; The water separated through submerged ultrafiltration separate tank is discharged by an outlet conduit part, another part is stored in water outlet storage pond; Backwashing equipment comprises backwashing pump, pneumavalve and magnetic flow meter; Backwashing pump one end and water outlet are stored up pond and are connected, and send water to carry out back flushing after the other end connects pneumavalve and magnetic flow meter successively by outlet conduit to submerged ultrafiltration separate tank; The charcoal slurry in charcoal water pre-mixing pond by row's charcoal pipe send into dewater in filtering equipment after utilize connecting tube to send in charcoal reclaim equiment to regenerate, finally utilize connecting tube to send into dust active carbon and join recycle in charcoal tank.
The Industrial Waste Water Treatments plant tail water of the present embodiment sends into charcoal water pre-mixing pond by inlet channel, inlet channel is configured with inlet channel pump, battery valve and magnetic flow meter; Dust active carbon joins charcoal tank by adding charcoal pipe to submerged ultrafiltration separate tank conveying powder gac, adds on charcoal pipe and is configured with METERING DIAPHRAGM PUMPS; Be connected with charcoal water pre-mixing pond by return line in submerged ultrafiltration separate tank, return line be provided with ball valve, circulating pipe pump and magnetic flow meter; The water that submerged ultrafiltration separate tank is separated is discharged by an outlet conduit part, outlet conduit is configured with vacuum pressure gauge, pneumavalve and magnetic flow meter; The charcoal slurry in charcoal water pre-mixing pond is sent in filtering equipment by row's charcoal pipe and is dewatered, and row's charcoal pipe is provided with ball valve and pneumatic diaphragm pump.
Know-why of the present invention is: adopt high density Powdered Activated Carbon and the abundant mixing and absorption water pollutant of sewage, adopts the Powdered Activated Carbon that external-compression type tubular fibre enhancing silk microfiltration membrane is come in Separation of Water, and adsorption process is about membrane sepn engineering and combines.Hollow fiber film thread component film curtain, multiple film curtain forms membrane module, and arrange perforated pipe aerating regulation under assembly, aeration tolerance parameter is 0.4 ~ 0.6m 3/ (m 2water surface min), air-flow drives current strong disturbance can make Powdered Activated Carbon and the abundant contact reacts of sewage and upgrades film surface.Produce water conservancy siphon or vacuum primingpump formation negative pressure extraction clear water.The whole service cycle, each step time water yield was set flexibly by automatic control equipment containing producing water, standing, backwash process.A charcoal water pre-mixing pond is set before submerged ultrafiltration separate tank, mix from membrane cisterna internal reflux high density charcoal slurry with water inlet, hydraulic detention time is 20 ~ 40min about, charcoal water pre-mixing pond end arranges row's charcoal pipe and connects row's charcoal pump, row's charcoal underflow is entered concentrating and precipitating pond and is concentrated, and dense charcoal slurry drains into filtering equipment dehydration through surge pump again.
Ask for an interview Fig. 2, specific implementation of the present invention comprises the following steps:
Step 1: add Powdered Activated Carbon, dosage 10 ~ 1000mg/L, adopts Powdered Activated Carbon jet to suck and mixes with water, is configured to the charcoal slurry of about 5%.Measured by pump after charcoal slurry is uniformly mixed and squeeze into submerged membrane separate tank (membrane cisterna) front end.
Step 2: charcoal water pre-mixing, charcoal water pre-mixing pond, hydraulic detention time 20 ~ 40min, water is separated rear dense charcoal and starches rear mixing of refluxing with membrane cisterna, complete pre-mixing process, and after backflow charcoal slurry mixes with water, charcoal concentration is about 30g/L.Pre-mixing can by perforated pipe aerating regulation or pushing flow mixer mixing.
Step 3: in submerged ultrafiltration separate tank, charcoal absorption and charcoal water are separated, external-compression type immersion type membrane component is arranged in submerged ultrafiltration separate tank, membrane module is assemblied by multiple film curtain, a film curtain is fixed with thousands of hollow fiber film threads, and membrane module bottom is provided with boring aeration pipe, header, rising pipe.Add the charcoal slurry that new Powdered Activated Carbon configures in membrane cisterna front end, utilize the dirty organic pollutants of powder electroless plating; The rising pipe of multiple membrane module connects primary flow pipe, and producing water is utilize to produce the negative pressure of water pump or syphonic effect is drawn water, and sewage is through the membrane separating process that film silk enters membrane module header, rising pipe, primary flow pipe complete charcoal water.The cycle of operation, backwash was, by impeller pump, the reverse direction that water and product water cross film is extruded film silk in order to produce water, standing, backwash, about 15 minutes whole cycle.Whole process aeration meets charcoal water mixing object and film fusain layer Surface Renewal.
Film adopts external-compression type tubular fibre to strengthen cortina, and membrane pore size is micron order.Be equipped with perforated pipe aeration apparatus in aeration membrane cisterna, aeration tolerance parameter is 0.4 ~ 0.6m 3/ (m 2water surface min), air-flow drives current strong disturbance can make Powdered Activated Carbon and the abundant contact reacts of sewage and upgrades film surface, the cycle of operation sets flexibly, the regular backwash of film is with restorability, backwash flow is 1.5 ~ 2 times of flooding velocity, the backwash accumulation water yield is about water production rate 3 ~ 10%, runs vacuum tightness 1 ~ 4m hydraulic pressure.Powdered Activated Carbon cumulative concentration in membrane cisterna is up to 5 ~ 100g/L and maintenance is stable.
Step 4: charcoal slurry thickening, row's charcoal pipe is set from pre-mixing pond end and connects row's charcoal pump, row's charcoal underflow is entered concentrating and precipitating pond and is concentrated, and dense charcoal slurry drains into filtering equipment dehydration through surge pump, and on concentrating and precipitating pond, cleer and peaceful filtering equipment pressure filtration yielding water is collected for preparing new charcoal slurry.
The present invention is all by automatic control equipment controlling run, sets forth the present invention further below by two embodiments.
Embodiment 1:
The second stage of the project 400,000 tons/day of certain large-scale printing and dyeing industry garden sewage work, adopt water quality conditioning+extended aeration technique, hydraulic detention time 72h, bio-chemical effluent discharges after sedimentation in secondary sedimentation tank, do advanced treatment for waste discharge and put forward mark engineering, pilot scale 200m3/d.Influent COD cr value 160 ~ 180mg/L, suspended substance 70mg/L, colourity 80 times.
Its processing unit type selecting parameter is as follows:
(1) charcoal water pre-mixing pond;
Size: length, width and height 1.8m × 0.8m × 4.0m, hydraulic detention time 20min; Reflux line impeller pump, power is 1.1kw; Lift is 12m, and flow is 12m 3/ h; DN40 magnetic flow meter one;
(2) formula Ultra filtration membrane pond is not had;
Function: be provided with curtain type membrane 220m 2, boring aeration pipe aeration agitation is installed in bottom, realizes charcoal water and fully contacts, and the membrane separation apparatus (hereinafter referred to as C-UF) of the similar MBR installed in the body of pond take stainless steel as film frame, fixing membrane module, during negative pressure-pumping, realizes charcoal water and is separated.Employing vacuum primingpump draws water, impeller pump backwash, and vacuum primingpump is opened 8min and stopped 2min, and 30s opened by impeller pump, and operation time parameters can adjust flexibly.Size: length, width and height 1.8m × 1.8m × 4.0m, hydraulic detention time 53min, operating water level: 3.0m ~ 3.5m;
Equipment: membrane module is 220m 2, flux is 50L/m 2h, aspiration vacuum level is 0.01 ~ 0.04MPa;
Suction pump: power is 1.5kw, H is 8m, and flow is 15m 3/ h.
Pneumavalve: Dn50,2, for controlling vacuum primingpump and backwashing pump.
Under meter: DN40, water inlet, each 1 of backwash;
Backwashing pump: impeller pump power is 2.2kw, flow is 25m 3/ h, H are 14m;
Blower fan: power is 5.5kw, pressure is 45kpa, and tolerance is 3.5m 3/ min, the using and the reserved.
(3) water outlet storage pond;
Function: Chu Chi is for storing backwashing pump backwash hourly water consumption.Parameter: PE tank body 2m 3;
(4) charcoal system is added;
For configuring new gac slurry, adopting water inlet for joining charcoal water, adding Powdered Activated Carbon, the mixing of turn on agitator slurry charcoal slurry, adopts electronic METERING DIAPHRAGM PUMPS to supplement new charcoal.
Equipment: PE tank body: 2m 3, one; Stirrer: rotating speed is 20r/min, 3kw, one; Electric diaphragm pump volume pump: 1000L/H, 370w, one; Magnetic flow meter: Dn20, one;
(5) charcoal system is arranged;
(6) for exhaust-valve bottom pre-mixing pond connects a microdiaphragm pump, by charcoal slurry drain into filter press, after filter-press dehydration, institute arrange saturated charcoal for charcoal regenerate.Parameter: pneumatic diaphragm pump: 6000L/H, 60m lift, one; Magnetic flow meter: Dn20, one;
(7) complete machine can realize PLC full automatic control;
Process operating parameters:
(1) add charcoal: add charcoal twice day, daytime, once once, ensured that the concentration of joining in charcoal bucket is about 6%, daily adds charcoal amount and is about 700mg/L in the evening.
(2) charcoal is arranged: pilot scale plant row charcoal frequency is once a day, each 1 ~ 2 hour, and row's charcoal amount is about 8m 3/ d, concentration is 15g/L, row's charcoal amount with add charcoal amount and maintain and balance.
(3) C-UF system charcoal slurry internal circulating load: make it mix together with water inlet by charcoal slurry circulation in C-UF system, make unsaturated charcoal starch pollutent in absorption effluent in advance, it is slightly larger than flooding quantity that charcoal starches quantity of circulating water.To form Pollutant levels difference, adsorb more multi-pollutant.Charcoal slurry internal circulating load is 1.5 ~ 2 times of flooding velocity.
(4) C-UF intrasystem charcoal concentration: intrasystem charcoal concentration can up to 10 ~ 100g/L, and the charcoal concentration in this pilot test system ensures at 30g/L.
(5) swabbing pressure: owing to possessing higher charcoal concentration in C-UF system, pollutent is fully adsorbed by gac, fouling membrane situation is minimum, swabbing pressure is between 0.01 ~ 0.015MPa, is generally 0.0125MPa.
(6) backwash pressure and the backwash water yield: backwash pressure is 0.045MPa, backwash water flow is 1.5 ~ 2 times of water flow, and each cycle backwash time is 30s, and the backwash water yield accounts for 10% of water production rate.
(7) aeration rate: the object of aeration is that Powdered Activated Carbon is not deposited in water, and wash away film silk surface with the turbulent water that bubble rising is formed, avoid forming concentration polarization at film silk, reduce film surface pollution, therefore wash away strength of turbulence by bubble in the unit water area unit time bloat intensity determine.Aeration rate 0.5m 3/ (m 2water surface min).
(8) cycle of operation: the cycle of operation is 10 minutes one-period, and the carrying out practically cycle is: run 8 minutes, shut down 1 point 30 seconds, backwash 30 seconds.
(9) charcoal regeneration: this pilot scale plant charcoal regeneration situation is as follows, methylene blue recovery rate 100%, rate of loss 10%.
After taking above art breading, result is as follows, reaches injection water quality standard, and water conditioning.The present embodiment result is as shown in table 1 below.
Table 1 processes rear effluent quality parameter
Classification COD(mg/l) SS(mg/l) Colourity
Water inlet 160-180 70 80
Water outlet ≦60 ≦5 ≦15
Embodiment 2:
The second stage of the project 400,000 tons/day of certain large-scale printing and dyeing industry garden sewage work, adopt water quality conditioning+extended aeration technique, hydraulic detention time 72h, bio-chemical effluent discharges after sedimentation in secondary sedimentation tank after air supporting dosing, do advanced treatment for air supporting discharge tail water and put forward mark engineering, pilot scale 200m3/d.Influent COD cr value 120mg/L, suspended substance 40mg/L, colourity 60 times.Its processing unit type selecting parameter is as follows:
(1) gac dosage: daily add charcoal amount and be about 500mg/L.
(2) arrange charcoal: pilot scale plant row charcoal frequency be once a day, each 1 ~ 2 hour, row's charcoal amount is about 3m3/d, and concentration is 35g/L, row's charcoal amount and add charcoal amount and maintain and balance.
(3) C-UF system charcoal slurry internal circulating load: be 1.5 ~ 2 times of flooding velocity.
(4) C-UF intrasystem charcoal concentration: intrasystem charcoal concentration can up to 10 ~ 100g/L, and the charcoal concentration in pilot test system ensures at 70g/L.
(5) swabbing pressure and water production rate: owing to possessing higher concentration of activated carbon in C-UF system, pollutent is fully adsorbed by gac, fouling membrane situation is minimum, swabbing pressure is between 0.01 ~ 0.015MPa, is generally 0.0125MPa.Flow mainly controls by vacuum primingpump outlet valve, field control 14.5m 3/ h.The transmembrane pressure meter water yield according to long-play record is analyzed, and transmembrane pressure changing value is very little, and illustrate that fouling membrane stopping state is minimum, stability is high.
(6) backwash pressure and the backwash water yield: table display pressure 0.025MPa when shutting down static; table display pressure 0.045MPa during backwash; backwash pressure is 0.02MPa; backwash water flow is 1.5 ~ 2 times of water flow; the each cycle backwash time is 15s, and the backwash water yield accounts for 3.33% of water production rate.
(7) aeration rate: 0.64m 3/ (㎡ water surface min), the amount that in unit water area, bubble is routed up determines strength of turbulence, determines the scouring intensity of film.
(8) cycle of operation: the cycle of operation is 10 minutes one-period, and the carrying out practically cycle is: run 8 minutes, shut down 1 point 45 seconds, backwash 15 seconds.
(9) charcoal regeneration: this pilot scale plant charcoal regeneration situation is as follows, methylene blue recovery rate 100%, rate of loss 10%.
After taking above art breading, result is as follows, reaches injection water quality standard, and water conditioning.The present embodiment result is as shown in table 2 below.
Table 2 processes rear effluent quality parameter
The Powdered Activated Carbon physical and chemical adsorption process in sewage disposal that present invention incorporates is separated sewage unit and combines deeply treating wastewater technology with submerged membrane, powder electroless plating and submerged ultrafiltration are concentrated in a membrane cisterna, realize that technical process is simple, automatic control level is high, treatment effect is stablized, gac can the sewage treatment process of reclaiming.
Should be understood that, the part that this specification sheets does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.

Claims (9)

1. utilize submerged ultrafiltration to carry out an advanced sewage treatment system, it is characterized in that: comprise dust active carbon and join charcoal tank, charcoal water pre-mixing pond, submerged ultrafiltration separate tank, water outlet storage pond, concentrating and precipitating pond and filtering equipment;
Be provided with external-compression type submerged membrane in submerged ultrafiltration separate tank, described dust active carbon joins charcoal tank by adding charcoal pipe to described submerged ultrafiltration separate tank conveying powder gac; Industrial Waste Water Treatments plant tail water sends into described charcoal water pre-mixing pond by inlet channel, starch with the charcoal refluxed by return line in described submerged ultrafiltration separate tank and carry out the pre-mixing of charcoal water, mixed charcoal water is sent into submerged ultrafiltration separate tank through pipeline and is separated; The water separated through described submerged ultrafiltration separate tank is discharged by an outlet conduit part, another part is stored in described water outlet storage pond;
The charcoal slurry in described charcoal water pre-mixing pond is sent into concentrated rear the feeding in filtering equipment in described concentrating and precipitating pond by row's charcoal pipe and is carried out dewatering and recovery.
2. the submerged ultrafiltration that utilizes according to claim 1 carries out advanced sewage treatment system, it is characterized in that: described external-compression type submerged membrane adopts external-compression type tubular fibre to strengthen cortina, membrane pore size is micron order, and film silk material is polyvinylidene difluoride (PVDF), film silk component film curtain and membrane module.
3. the submerged ultrafiltration that utilizes according to claim 1 carries out advanced sewage treatment system, it is characterized in that: described system is also configured with gas blower, described gas blower utilizes connecting tube to be connected with the boring aeration pipe arranged bottom charcoal water pre-mixing pond and submerged ultrafiltration separate tank respectively, stirs air source used for charcoal water pre-mixing pond and submerged ultrafiltration separate tank provide.
4. the submerged ultrafiltration that utilizes according to claim 1 carries out advanced sewage treatment system, it is characterized in that: described system is also configured with backwashing equipment, comprises backwashing pump, pneumavalve and magnetic flow meter; Described backwashing pump one end and described water outlet are stored up pond and are connected, and send water to carry out back flushing after the other end connects pneumavalve and magnetic flow meter successively by outlet conduit to described submerged ultrafiltration separate tank.
5. the submerged ultrafiltration that utilizes according to claim 1 carries out advanced sewage treatment system, it is characterized in that: described system is also configured with charcoal reclaim equiment, the charcoal slurry in described charcoal water pre-mixing pond by row's charcoal pipe send into dewater in described filtering equipment after utilize connecting tube to send in charcoal reclaim equiment to regenerate, finally utilize connecting tube to send into described dust active carbon and join recycle in charcoal tank.
6. the submerged ultrafiltration that utilizes according to claim 1,2,3,4 or 5 carries out advanced sewage treatment system, it is characterized in that: described Industrial Waste Water Treatments plant tail water sends into described charcoal water pre-mixing pond by inlet channel, inlet channel is configured with inlet channel pump, battery valve and magnetic flow meter; Described dust active carbon joins charcoal tank by adding charcoal pipe to described submerged ultrafiltration separate tank conveying powder gac, adds on charcoal pipe and is configured with METERING DIAPHRAGM PUMPS; Be connected with described charcoal water pre-mixing pond by return line in described submerged ultrafiltration separate tank, return line be provided with ball valve, circulating pipe pump and magnetic flow meter; The water that described submerged ultrafiltration separate tank is separated is discharged by an outlet conduit part, outlet conduit is configured with vacuum pressure gauge, pneumavalve and magnetic flow meter; The charcoal slurry in described charcoal water pre-mixing pond is sent in described filtering equipment by row's charcoal pipe and is dewatered, and row's charcoal pipe is provided with ball valve and pneumatic diaphragm pump.
7. utilize the system described in claim 1 to carry out a method for advanced treatment of wastewater, it is characterized in that, comprise the following steps:
Step 1: add Powdered Activated Carbon;
Join to dust active carbon the Powdered Activated Carbon that charcoal tank adds certain metering, adopt Powdered Activated Carbon jet to suck and mix with water, configure certain density charcoal slurry, then squeeze in submerged ultrafiltration separate tank by METERING DIAPHRAGM PUMPS;
Step 2: charcoal water pre-mixing;
Industrial Waste Water Treatments plant tail water is flowed in charcoal water pre-mixing pond to starch with the charcoal refluxed by return line in described submerged ultrafiltration separate tank and fully mixes;
Step 3: charcoal absorption and charcoal water are separated;
Be provided with external-compression type submerged membrane in submerged ultrafiltration separate tank, sewage completes advanced treatment process through film silk;
Step 4: charcoal slurry precipitation concentration dehydration;
Charcoal slurry is sent into concentrating and precipitating pond from row's charcoal pipe that charcoal water pre-mixing pond end is arranged and is concentrated, and dense charcoal slurry drains into filtering equipment dehydration slurry through surge pump.
8. method according to claim 7, is characterized in that: in step 1, the metering of the Powdered Activated Carbon of dosage is 10 ~ 1000mg/L, and the charcoal slurry concentration be configured to is about 5%.
9. method according to claim 7, it is characterized in that: the flow starched from the charcoal of described submerged ultrafiltration separate tank internal reflux in step 2 is 1 ~ 1.5 times that flows into tail water flow in charcoal water pre-mixing pond, charcoal concentration about 5 ~ 100g/L after mixing, mixing time is 20 ~ 40min.
CN201510866155.8A 2015-11-27 2015-11-27 System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane Pending CN105347533A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106277205A (en) * 2016-09-21 2017-01-04 湖北君集水处理有限公司 A kind of device and method utilizing submerged ultrafiltration to carry out water body purification
CN106630003A (en) * 2016-11-02 2017-05-10 深圳市康源环境纳米科技有限公司 Oily wastewater treatment device and method
CN106904756A (en) * 2017-02-27 2017-06-30 同济大学 Gravity type ultrafiltration membrance filter and purifier associated with powder electroless plating
CN107021597A (en) * 2017-06-20 2017-08-08 湖北君集水处理有限公司 Improve the system and method for biochemical and deeply treating wastewater using Powdered Activated Carbon
CN107376653A (en) * 2017-09-22 2017-11-24 南京中医药大学 A kind of method for reducing fouling membrane in Chinese medicine extract or waste water membrane separating process
CN107892400A (en) * 2017-11-28 2018-04-10 北京中科康仑环境科技研究院有限公司 A kind of mud contacts type powder electroless plating processing system and its method based on UF membrane
CN108375951A (en) * 2018-02-13 2018-08-07 广州资源环保科技股份有限公司 A kind of creek dissolved oxygen automatic monitoring method
CN108375950A (en) * 2018-02-13 2018-08-07 广州资源环保科技股份有限公司 A kind of creek dissolved oxygen automatic monitored control system
CN108503056A (en) * 2018-03-29 2018-09-07 同济大学 A kind of processing unit for rural potable water

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