CN103613168A - Method and system for recycling waste water by combining spark generation plasma with multistage membrane technology - Google Patents
Method and system for recycling waste water by combining spark generation plasma with multistage membrane technology Download PDFInfo
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- CN103613168A CN103613168A CN201310615254.XA CN201310615254A CN103613168A CN 103613168 A CN103613168 A CN 103613168A CN 201310615254 A CN201310615254 A CN 201310615254A CN 103613168 A CN103613168 A CN 103613168A
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Abstract
The invention discloses a method and a system for recycling waste water by combining a spark generation plasma with a multistage membrane technology. The method comprises the steps of 1) by taking a thyratron switching power supply and a needle plate type spark discharge plasma generator as a basis, modifying an ultrafiltration membrane and a reverse osmosis membrane by adopting spark discharge to generate plasma; 2) pretreating waste water in a plug flow reactor through activated carbon adsorption and a microfiltration membrane; 3) controlling the conductivity of to-be-treated waste water by controlling the feeding amount of organic loads, so as to ensure that waste water treatment is carried out under a spark discharge mode; 4) combining plasma, generated by pulse discharge by adopting a spark discharge plasma technology, with activated carbon and ultraviolet radiation to treat waste water; and 5) treating waste water by combining an ultrafiltration/reverse osmosis double-membrane technology with a plasma technology. According to the method and system, the turbidity removal rate of various printing and dyeing waste water can achieve more than 99%, the conductance removal rate can achieve more than 99%, the COD (Chemical Oxygen Demand) removal rate can achieve more than 97%, the BOD (Biochemical Oxygen Demand) removal rate can achieve more than 96%, and the membrane pollution degree can be minimized.
Description
Technical field
The waste water recycling method and the system that the present invention relates to spark generating plasma body cooperative Using Multistage Membranes technology, belong to field of waste water treatment.
Background technology
Along with the fast development of dyestuffs industries, its factory effluent has become one of current topmost pollution source of water body, and its water quality presents high chroma, high density, high COD and BOD value.Dyeing waste water accounts for 30% of enterprise wastewater total release, once dyeing waste water enters the Waste Water Treatment of enterprise, will make water treatment effect reduce, and intractability and processing cost increase.
Reverse osmosis technology has the plurality of advantages such as low equipment investment, energy expenditure is low, the construction period is short, utilize RO technology to carry out Treatment for Reuse to waste water of far-reaching significance as non-direct drinking water source, and film pollution is the bottleneck of this technology widespread use of restriction all the time, lack at present the measure that effectively reduction film pollutes.
It is also a kind of selection of commonly using that using ozone is processed waste water, but at least also has at present two key issues to need to solve: the one, and ozone energy consumption is higher, and productive rate is lower, and the cost of operation is increased; The 2nd, the solubleness of ozone in water is lower, is not utilized effectively and overflows.
Finally, single plasma technique, technology of biological membrane or high-level oxidation technology process range are limited, and comprehensive various technology not only need to overcome above-mentioned various technical problem, also need cross-cutting experience and knowledge.Therefore, the current combined system that still lacks a kind of coordination can make every discharge of wastewater index effectively reduce simultaneously.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of this invention is to provide waste water recycling method and the system of spark generating plasma body cooperative Using Multistage Membranes technology.
The waste water recycling method of spark generating plasma body cooperative Using Multistage Membranes technology,
1) adopting thyratron switch power supply and needle plate type spark discharge plasma generator is basis, adopts spark discharge to produce plasma body ultra-filtration membrane, reverse osmosis membrane are carried out to modification;
2) in plug flow reactor, by charcoal absorption and microfiltration membrane, waste water is carried out to pre-treatment;
3) by controlling the dosage of organic loading, control pending useless electrical conductivity of water, guarantee to carry out wastewater treatment under spark discharge pattern;
4) adopt spark discharge plasma technique Pulsed Discharge plasma body and gac, uv-radiation associated treatment waste water under the bag Oxygen Condition ozoniferous that exposes to the sun;
5) utilize the collaborative plasma technology of the two membrane techniquies of ultrafiltration/reverse osmosis to process waste water.
Further, 6) regularly utilize EDTA to clean reverse osmosis membrane.
Preferably, described needle plate type spark discharge plasma generator, electrion pin electrode comprises 16 hollow stainless steel needles, 0.8mm, outer ring is ellipticity, be uniformly distributed 12 pin electrodes, be spaced apart 20mm, inner ring is 4, successively decrease in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, and the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm, plate electrode ground connection; The crest voltage 0-25KV of described impulsive discharge power supply, pulse-repetition 100-300Hz; The spacing of described pin electrode and plate electrode is 1.0-4.0cm.
Preferably, effluent adopting intermittent operation mode, produces water 10 min, empty aeration 2 min.
Preferably, adopt three gallery plug-flow aeration tanks, to weaken the impact of waste water to Using Multistage Membranes, spiral advancing under differential pressure action, makes waste water fully contact and then be effectively addressed with film.
Described waste water is dyeing waste water, and pH value is 4-10, applies after described method, and turbidity removal rate is more than 99%, and electricity is led clearance more than 99%, and COD clearance is more than 97%, and BOD clearance is more than 96%.
A waste water reuse system for spark generating plasma body cooperative Using Multistage Membranes technology, comprises needle plate type spark discharge plasma generator, plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor, conductivity control system;
Described needle plate type spark discharge plasma generator comprises electrion pin electrode, plate electrode, water jacket, thyratron switch high-voltage pulse power source, anemometer, air chamber, gas tank, microtubule, water coolant;
The ventilating pit at electrion pin electrode place is made by microtubule, is connected with air chamber, and gas tank is filled with bag oxygen ozoniferous, gas flows through air valve, anemometer, microtubule in turn, needle point at electrion pin electrode forms bubble, and plate electrode ground connection, passes into water coolant by water jacket;
Described plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor comprises hollow fiber microfiltration membrane assembly, fluid level controller, intake pump, PCL controller, ultra-filtration membrane, reverse osmosis membrane, PVC carrier, waste water enters reactor by intake pump by water inlet pipe, by fluid level controller, control water level, and feed back to PCL controller; Waste water is first through the filter membrane pre-treatment that declines of polyvinylidene fluoride hollow fiber curtain, by aeration tank continuous aeration, utilize needle plate type spark discharge plasma generator to expose to the sun and produce plasma body into bag oxygen ozoniferous, simultaneously in spark discharge, gac in the UV-light radiating from plasma channel and device PVC carrier, with constantly expose to the sun into ozone form the combination of ozone/uv-radiation, ozone is strengthened the processing to waste water with the synergistic high-level oxidation technology of gac; Going out under the effect of water pump negative pressure-pumping, waste water sees through ultra-filtration membrane, reverse osmosis membrane successively;
Described conductivity control system comprises sampling tube, described PCL controller, described goes out water pump, conductivity meter, by sampling tube, regularly draws water sample, by conductivity meter, is measured, and feeds back to PCL controller, leads and monitors simultaneously in addition to going out the water power that outes of water pump.
Preferably, described aeration tank is three gallery plug-flow aeration tanks.
Preferably, described ultra-filtration membrane adopts PSF/SPSF; Described reverse osmosis membrane adopts CPA2-4040 composite polyamide.
Preferably, described needle plate type spark discharge plasma generator, electrion pin electrode comprises 16 hollow stainless steel needles, 0.8mm, and outer ring is ellipticity, be uniformly distributed 12 pin electrodes, be spaced apart 20mm, inner ring is 4, successively decreases in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, and the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm.
The useful benefit that the present invention has, rely on spark discharge to produce plasma body cooperative micro-filtration/ultrafiltration/reverse osmosis Using Multistage Membranes technology pollution degradation material, use membrane separation technique, plasma technique and high-level oxidation technology to process waste water simultaneously, to the turbidity removal rate of all kinds of dyeing waste waters more than 99%, electricity is led clearance more than 99%, COD clearance is more than 97%, and BOD clearance is more than 96%, and all reaches printing-dying wastewater recycling index.And film pollution level is dropped to minimum, produce hardly secondary pollution, created good economic benefit and good environmental benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the waste water reuse system of spark generating plasma body cooperative Using Multistage Membranes technology of the present invention;
Fig. 2 is the structural representation of three gallery plug-flow aeration tank floor plan of the present invention;
Fig. 3 is the structural representation of electrion pin electrode of the present invention;
In figure, hollow fiber microfiltration membrane assembly 1, sampling tube 2, fluid level controller 3, intake pump 4, PCL controller 5, electrion pin electrode 6, plate electrode 7, water jacket 8, ultra-filtration membrane 9, reverse osmosis membrane 10, tensimeter 11, go out water pump 12, high-voltage pulse power source 13, under meter 14, gas blower 15, anemometer 16, air chamber 17, gas 18, microtubule 19, water coolant 20, PVC carrier 21.
Embodiment
As shown in Figure 1, the waste water reuse system of spark generating plasma body cooperative Using Multistage Membranes technology, comprises needle plate type spark discharge plasma generator, plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor, conductivity control system;
Described needle plate type spark discharge plasma generator comprises electrion pin electrode 6, plate electrode 7, water jacket 8, thyratron switch high-voltage pulse power source 13, anemometer 16, air chamber 17, gas tank 18, microtubule 19, water coolant 20;
The ventilating pit at electrion pin electrode 6 places is made by microtubule 19, be connected with air chamber 17, gas tank 18 is filled with bag oxygen ozoniferous, gas flows through air valve, anemometer 16, microtubule 19 in turn, needle point at electrion pin electrode 6 forms bubble, plate electrode 7 ground connection, pass into water coolant 20 by water jacket 8;
Described plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor comprises hollow fiber microfiltration membrane assembly 1, fluid level controller 3, intake pump 4, PCL controller 5, ultra-filtration membrane 9, reverse osmosis membrane 10, tensimeter 11, PVC carrier 21, waste water enters reactor by intake pump 4 by water inlet pipe, by fluid level controller 3, control water level, and feed back to PCL controller 5; Waste water is first through filter membrane 1 pre-treatment that declines of polyvinylidene fluoride hollow fiber curtain, by aeration tank continuous aeration, waste water ecto-entad sees through film, trapped particles impurity and microorganism, reach the object of purification, simultaneously decelerating membrane pollution, the duration of service that extends film, the operation steady in a long-term of assurance reverse osmosis membrane system.
Utilize needle plate type spark discharge plasma generator to expose to the sun and produce plasma body into bag oxygen ozoniferous, simultaneously in spark discharge, gac in the UV-light radiating from plasma channel and device PVC carrier 21, with constantly expose to the sun into ozone form the combination of ozone/uv-radiation, ozone is strengthened the processing to waste water with the synergistic high-level oxidation technology of gac; Going out under water pump 12 negative pressure-pumping effects, waste water sees through ultra-filtration membrane 9, reverse osmosis membrane 10 successively, and waste water is purified, and going out near setting pressure table 11 water pump 12, with control pump, in declared working condition, moves, and guarantees the normal use of pump; Gac is placed in to 4 spherical PVC carriers 21, can prevents that gac from moving in pulling flow type reaction tank, affects the normal operation of combined films and plasma generator on a large scale.
Described conductivity control system comprises sampling tube 2, described PCL controller 5, described goes out water pump 12, conductivity meter, by sampling tube 2, regularly draw water sample, by conductivity meter, measured, feed back to PCL controller 5, to going out the water power that outes of water pump 12, lead and monitor simultaneously in addition.
Preferably, as shown in Figure 2, described aeration tank is three gallery plug-flow aeration tanks.Plasma modification multi-stage biofilm is worked in coordination with plasma technology plug flow reactor, adopt three gallery plug-flow aeration tank floor plan, to weaken the impact of waste water to Using Multistage Membranes, spiral advancing under differential pressure action, makes waste water fully contact and be effectively addressed with film.
Preferably, described ultra-filtration membrane 9 adopts PSF/SPSF (SPSF), and ultra-filtration membrane 9 is pressed particle diameter and selected particulate and the macromole in separation solution, can effectively reduce turbidity.Utilize plasma technique to process and can improve its surperficial wetting ability ultra-filtration membrane 9 surfaces, improve the resistance to crocking of ultra-filtration membrane simultaneously.
Described reverse osmosis membrane 10 adopts CPA2-4040 composite polyamide, can not only under low pressure effectively remove organism, reduce COD, and have significant desalting effect.Utilize plasma technology to carry out modification to reverse osmosis membrane and can make flux raising, the rejection of film increase, and can improve chlorine resistance and the resistance to crocking of film, improve reverse osmosis membrane permeability and selectivity, the adhesion of supporting layer and active coating is more solid simultaneously.Mould material after modification more easily cleans, and resistance to crocking is greatly improved.
Preferably, as shown in Figure 3, described needle plate type spark discharge plasma generator, electrion pin electrode comprises 16 hollow stainless steel needles (0.8mm), outer ring is ellipticity, be uniformly distributed 12 pin electrodes, be spaced apart 20mm, inner ring is 4, successively decreases in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, and the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm.Layout to center centralization type contributes to obtain higher pulse energy, makes spark discharge have higher energy efficiency, liquid phase O in discharge process simultaneously
3concentration reach 6.5mmol/L.
The waste water recycling method of spark generating plasma body cooperative Using Multistage Membranes technology,
1) adopting thyratron switch power supply and needle plate type spark discharge plasma generator is basis, adopts spark discharge to produce plasma body ultra-filtration membrane, reverse osmosis membrane are carried out to modification;
2) in plug flow reactor, by charcoal absorption and microfiltration membrane, waste water is carried out to pre-treatment;
3) by controlling the dosage of organic loading, control pending useless electrical conductivity of water, guarantee to carry out wastewater treatment under spark discharge pattern; Conductivity control system, for controlling the specific conductivity of spark discharge position, regularly draws water sample by sampling tube 2, by conductivity meter, is directly measured, and feeds back to PCL controller 5, controls influent load, to reduce the ion content in reaction unit.To going out the water power that outes of water pump 12, lead and monitor simultaneously in addition, guarantee that electricity leads clearance more than 99%, when water quality is not up to standard, feedback, adjusts and produces water aeration time ratio, to extend the treatment time in time.
4) adopt spark discharge plasma technique Pulsed Discharge plasma body and gac, uv-radiation associated treatment waste water under the bag Oxygen Condition ozoniferous that exposes to the sun;
5) utilize the collaborative plasma technology of the two membrane techniquies of ultrafiltration/reverse osmosis to process waste water.
Further, 6) regularly utilize EDTA to clean reverse osmosis membrane.
Preferably, described needle plate type spark discharge plasma generator, electrion pin electrode comprises 16 hollow stainless steel needles, 0.8mm, outer ring is ellipticity, be uniformly distributed 12 pin electrodes, be spaced apart 20mm, inner ring is 4, successively decrease in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, and the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm, plate electrode ground connection; The crest voltage 0-25KV of described impulsive discharge power supply, pulse-repetition 100-300Hz; The spacing of described pin electrode and plate electrode is 1.0-4.0cm.
Preferably, effluent adopting intermittent operation mode, produces water 10 min, empty aeration 2 min.Going out under water pump 12 negative pressure-pumping effects, waste water ecto-entad sees through micro-filtration/ultrafiltration/reverse osmosis successively, and graininess impurity and microorganism are retained in contrive equipment, thereby reaches the object of purification of waste water and reuse.
Preferably, adopt three gallery plug-flow aeration tanks, to weaken the impact of waste water to Using Multistage Membranes, spiral advancing under differential pressure action, makes waste water fully contact and then be effectively addressed with film.
Described waste water is dyeing waste water, and pH value is 4-10, applies after described method, and turbidity removal rate is more than 99%, and electricity is led clearance more than 99%, and COD clearance is more than 97%, and BOD clearance is more than 96%.
Below by example, illustrate that the present invention is at the unusual effect aspect controlling diaphragm pollution.
embodiment 1
(1) take reverse osmosis membrane, to produce water be former water, under the pressure of 15Mpa, moves 24h.Record unit pressure, unit surface, the sign of the water outlet in unit time flux J.
(2) before wastewater treatment operations, measure initial flux J
0.
(3) with standard flux J/J
0the degree characterization of membrane pollution level declining.
The membrane flux decline per-cent that observation experiment records, finds that the ultra-filtration membrane membrane flux after Wastewater Pretreatment, plasma modification changes hardly, and the membrane flux decline per-cent of reverse osmosis membrane is in 8% left and right, therefore the present invention has reduced film pollution well.
Optimal conditions below by example in detail processing of the present invention.
1) adopting thyratron switch power supply and pin-plate reactor is basis, adopts spark discharge to produce plasma body;
2) crest voltage of regulating impulse power supply is 15KV, and pulse-repetition is 100Hz;
3) adjust the height of plate electrode, making pin electrode and plate electrode distance is 1.0cm, weak acid brilliant blue simulated wastewater is entered in the collaborative plasma technology plug flow reactor of plasma modification multi-stage biofilm by water inlet pipe by intake pump, by the water level in fluid level controller control device, regulating the pH value of simulation dyeing waste water is 4;
4) plasma body producing with needle plate type spark discharge plasma generator, to ultra-filtration membrane, reverse osmosis membrane modification, is measured the contact angle on membrane flux decline degree and film surface;
5) charcoal absorption in the ball type carrier in use device and hollow fiber microfiltration membrane are processed weak acid brilliant blue simulated wastewater To Implement Pre;
6) utilize needle plate type spark discharge plasma generator to expose to the sun and produce plasma body into bag oxygen ozoniferous, simultaneously in spark discharge, gac in plasma channel radiates stronger UV-light and device PVC carrier, with constantly expose to the sun into ozone form the combination of ozone/uv-radiation, ozone is strengthened the processing to waste water with the synergistic high-level oxidation technology of gac;
7) utilize the collaborative plasma technology advanced treatment used water difficult to degradate of the two membrane techniquies of ultrafiltration/reverse osmosis simultaneously;
8) in the going out under the effect of water pump negative pressure-pumping of intermittent operation, obtain reuse waste water, sampling records delivery turbidity, COD value, BOD value.
Other conditions are constant, change the crest voltage 15KV of the pulse power in the step in embodiment 2 (2) into 20KV.
embodiment 4
Other conditions are constant, change the crest voltage 15KV of the pulse power in the step in embodiment 2 (2) into 25KV.
Other conditions are constant, change the pulse-repetition 100Hz of the pulse power in the step in embodiment 2 (2) into 200Hz.
embodiment 6
Other conditions are constant, change the pulse-repetition 100Hz of the pulse power in the step in embodiment 2 (2) into 300Hz.
Other conditions are constant, change the pin electrode of 1.0cm in step (3) in embodiment 2 and the spacing of plate electrode into 2.0cm.
Other conditions are constant, change the pin electrode of 1.0cm in step (3) in embodiment 2 and the spacing of plate electrode into 3.0cm.
Other conditions are constant, change the pin electrode of 1.0cm in step (3) in embodiment 2 and the spacing of plate electrode into 4.0cm.
Other conditions are constant, change the pH value 4 of the simulation dyeing waste water in step (3) in embodiment 2 into 7.
Other conditions are constant, change the pH value 4 of the simulation dyeing waste water in step (3) in embodiment 2 into 10.
By example, confirm pollution substance in the dyeing waste water top condition of degrading in the wastewater recycling device of spark generating plasma body cooperative Using Multistage Membranes technology of the present invention: the pulsed voltage of the thyratron switch pulse power is 25KV, pulse-repetition is 200Hz, the optimum distance of pin electrode and plate electrode is 1cm, and the optimal ph of simulation dyeing waste water is 10.
principle of the present invention
1) adopting thyratron switch power supply and pin-plate reactor is basis, adopts spark discharge to produce plasma body ultra-filtration membrane, reverse osmosis membrane are carried out to modification; (2) in plug flow reactor, by charcoal absorption and microfiltration membrane, dyeing waste water is carried out to pre-treatment; (3) by controlling the dosage of organic loading, control pending useless electrical conductivity of water, guarantee to carry out wastewater treatment under spark discharge pattern; (4) adopt spark discharge plasma technique Pulsed Discharge plasma body and gac associated treatment used water difficult to degradate under the bag Oxygen Condition ozoniferous that exposes to the sun; (5) utilize the collaborative plasma technology advanced treatment used water difficult to degradate of the two membrane techniquies of ultrafiltration/reverse osmosis; (6) regularly add EDTA to clean reverse osmosis membrane.
Comprise needle plate type spark discharge plasma generator, the collaborative plasma technology plug flow reactor of plasma modification multi-stage biofilm, conductivity control system; Needle plate type spark discharge plasma generator has three aspects: effect, and (1) is processed and can be made film surface contact angle significantly reduce ultra-filtration membrane surface with plasma technique, thereby improves its surperficial wetting ability, improves the resistance to crocking of ultra-filtration membrane simultaneously; (2) utilizing Surface Treatment with Plasma technology to carry out modification to reverse osmosis membrane can make flux raising, the rejection of film rise, and can improve chlorine resistance and the resistance to crocking of film, improve reverse osmosis membrane permeability and selectivity, the adhesion of supporting layer and active coating is more solid simultaneously; (3) by spark discharge, expose to the sun and wrap oxygen generation plasma body ozoniferous, simultaneously in spark discharge, from radiation paths, radiate the gac in stronger UV-light and device, with constantly expose to the sun into ozone form the combination of ozone/uv-radiation, ozone is strengthened the processing to waste water with the synergistic high-level oxidation technology of gac.
Needle plate type spark discharge plasma generator adopts spininess plate electrode structure, successively decrease in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, layout to center centralization type contributes to obtain higher pulse energy, makes spark discharge have higher energy efficiency, discharge process liquid phase O simultaneously
3concentration reach 6.5mmol/L, adopt indigo blue sodium spectrophotometry to record.
Higher for ozone energy consumption in using ozone high-level oxidation technology, productive rate is lower, the problem that the solubleness of ozone in water is low, and the present invention is exposed to the sun into the oxygen that comprises a small amount of ozone as plasma body by spark pulse discharge technology, can greatly reduce the consumption of ozone, improve energy utilization rate.Impulsive discharge under the condition being existed by oxygen in addition, not only produces a large amount of OH degradation of contaminant, and produces for example ozone, superoxide (O
2 -) and singlet oxygen (
1o
2) isoreactivity material participates in reaction, although the ozone that oxygen constantly produces with constantly expose to the sun into ozone concentration large not, but by chance met the low feature of ozone solubleness in water, ozone is participated in high-level oxidation technology processing endlessly, the ozone newly entering in reaction unit also can well be dissolved in water, can greatly save ozone, reduce the pollution of ozone to air simultaneously.
Reverse osmosis technology has the plurality of advantages such as low equipment investment, energy expenditure is low, the construction period is short.It is universal that the working cost pollute increasing due to film has restricted this technology.The present invention cleans farthest reduction film by Wastewater Pretreatment, plasma modification, film and pollutes, and makes this wastewater recycling device have more application prospect.
Utilize plasma technique to process and can improve its surperficial wetting ability ultra-filtration membrane surface, improve the resistance to crocking of ultra-filtration membrane simultaneously; Utilize plasma technology to carry out modification to reverse osmosis membrane and can make flux raising, the rejection of film increase, and can improve chlorine resistance and the resistance to crocking of film, improve reverse osmosis membrane permeability and selectivity, the adhesion of supporting layer and active coating is more solid simultaneously.Mould material after modification more easily cleans, and resistance to crocking is greatly improved.Because plasma surface treatment is a kind of dry process, saved the operations such as oven dry indispensable in wet chemical process technique, wastewater treatment, possess province's energy, the advantage such as nuisanceless.
Adopt immersed microfiltration film as reverse osmosis technology pretreatment technology, hollow fiber film assembly is immersed in membrane filtration groove, by plug-flow aeration tank continuous aeration, waste water ecto-entad sees through film, trapped particles impurity and microorganism, reach the object of purification, simultaneously decelerating membrane pollution, the duration of service that extends film, the operation steady in a long-term of assurance reverse osmosis membrane system.
Adopt the ultra-filtration membrane of PSF/SPSF (SPSF) system to press particulate and the macromole in particle diameter selection separation solution, can effectively reduce turbidity.CPA2-4040 composite polyamide reverse osmosis membrane can not only under low pressure effectively be removed organism, reduce COD, and has significant desalting effect.
Adopt the dissolved organic matter matter in the water inlet of granulated active carbon Adsorption, guarantee RO membrane permeability energy and produce water water quality.Pulsed Discharge plasma body (O under the bag Oxygen Condition ozoniferous that exposes to the sun
3) process used water difficult to degradate with the ultraviolet cooperating of gac, spark discharge generation, effect is remarkable.
The spark discharge pattern that emmission spectrum interval forms when 400～500nm has higher single pulse energy, energy transfer efficiency and energy utilization efficiency, with respect to other discharge modes, spark discharge meeting produces the plasma channel of higher temperature and stronger UV-light, to produce more hydroxyl radical free radical, improves degradation effect.
Utilize plasma technology modified membrane, can give the performance of the various excellences of modified surface, and the thickness of modified layer (several nanometers to hundreds of nanometers) as thin as a wafer; Make the bulk property of matrix constant; Do not produce a large amount of byproducts and dyestuff, non-environmental-pollution.
Plasma technique coordinates Using Multistage Membranes separation that the organic concentration of dyeing waste water is reduced, C/N is reduced, contribute to reduce film thickness, prevent that microbial film is blocked up and increase the outer field resistance to mass transfer of microbial film, hinder substrate and enter microbial film internal layer, thereby the content of controlling bacterial digestion, prevents that aerobic heterotrophic bacterium amount reproduction from increasing biomembranous thickness.
The film that calcium ion in waste water causes pollutes the most serious, therefore regularly add EDTA, permutoid reaction occurs and make pollution layer become loose, and then wash pollutent under the effect of flow shear, weakens the pollution to reverse osmosis membrane.
Claims (10)
1. a waste water recycling method for spark generating plasma body cooperative Using Multistage Membranes technology, is characterized in that,
1) adopting thyratron switch power supply and needle plate type spark discharge plasma generator is basis, adopts spark discharge to produce plasma body ultra-filtration membrane, reverse osmosis membrane are carried out to modification;
2) in plug flow reactor, by charcoal absorption and microfiltration membrane, waste water is carried out to pre-treatment;
3) by controlling the dosage of organic loading, control pending useless electrical conductivity of water, guarantee to carry out wastewater treatment under spark discharge pattern;
4) adopt spark discharge plasma technique Pulsed Discharge plasma body and gac, uv-radiation associated treatment waste water under the bag Oxygen Condition ozoniferous that exposes to the sun;
5) utilize the collaborative plasma technology of the two membrane techniquies of ultrafiltration/reverse osmosis to process waste water.
2. method according to claim 1, is characterized in that, further, 6) regularly utilize EDTA to clean reverse osmosis membrane.
3. method according to claim 1, is characterized in that, described needle plate type spark discharge plasma generator, electrion pin electrode comprises 16 hollow stainless steel needles, 0.8mm, outer ring is ellipticity, is uniformly distributed 12 pin electrodes, be spaced apart 20mm, inner ring is 4, successively decreases in spray point electrode mind-set both sides in plate, and left and right is all symmetric up and down, the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm, plate electrode ground connection; The crest voltage 0-25KV of described impulsive discharge power supply, pulse-repetition 100-300Hz; The spacing of described pin electrode and plate electrode is 1.0-4.0cm.
4. method according to claim 1, is characterized in that, effluent adopting intermittent operation mode produces water 10 min, empty aeration 2 min.
5. method according to claim 1, is characterized in that, adopts three gallery plug-flow aeration tanks, and to weaken the impact of waste water to Using Multistage Membranes, spiral advancing under differential pressure action, makes waste water fully contact and then be effectively addressed with film.
6. method according to claim 1, is characterized in that, described waste water is dyeing waste water, pH value is 4-10, applies after described method, and turbidity removal rate is more than 99%, electricity is led clearance more than 99%, and COD clearance is more than 97%, and BOD clearance is more than 96%.
7. the waste water reuse system of spark generating plasma body cooperative Using Multistage Membranes technology, it is characterized in that, it comprises needle plate type spark discharge plasma generator, plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor, conductivity control system;
Described needle plate type spark discharge plasma generator comprises electrion pin electrode (6), plate electrode (7), water jacket (8), thyratron switch high-voltage pulse power source (13), anemometer (16), air chamber (17), gas tank (18), microtubule (19), water coolant (20);
The ventilating pit that electrion pin electrode (6) is located is made by microtubule (19), be connected with air chamber (17), gas tank (18) is filled with bag oxygen ozoniferous, gas flows through air valve, anemometer (16), microtubule (19) in turn, needle point at electrion pin electrode (6) forms bubble, plate electrode (7) ground connection, passes into water coolant (20) by water jacket (8);
Described plasma modification multi-stage biofilm coordinated with plasma technology plug flow reactor comprises hollow fiber microfiltration membrane assembly (1), fluid level controller (3), intake pump (4), PCL controller (5), ultra-filtration membrane (9), reverse osmosis membrane (10), PVC carrier (21), waste water enters reactor by intake pump (4) by water inlet pipe, by fluid level controller (3), control water level, and feed back to PCL controller (5); Waste water is first through the polyvinylidene fluoride hollow fiber curtain filter membrane 1 that declines) pre-treatment, by aeration tank continuous aeration, utilize needle plate type spark discharge plasma generator to expose to the sun and produce plasma body into bag oxygen ozoniferous, simultaneously in spark discharge, gac in the UV-light radiating from plasma channel and device PVC carrier (21), with constantly expose to the sun into ozone form the combination of ozone/uv-radiation, ozone is strengthened the processing to waste water with the synergistic high-level oxidation technology of gac; Going out under water pump (12) negative pressure-pumping effect, waste water sees through ultra-filtration membrane (9), reverse osmosis membrane (10) successively;
Described conductivity control system comprises sampling tube (2), described PCL controller (5), described goes out water pump (12), conductivity meter, by sampling tube (2), regularly draw water sample, by conductivity meter, measured, feed back to PCL controller (5), to going out the water power that outes of water pump (12), lead and monitor simultaneously in addition.
8. system according to claim 7, is characterized in that, described aeration tank is three gallery plug-flow aeration tanks.
9. system according to claim 7, is characterized in that, described ultra-filtration membrane (9) adopts PSF/SPSF; Described reverse osmosis membrane (10) adopts CPA2-4040 composite polyamide.
10. system according to claim 7, it is characterized in that, described needle plate type spark discharge plasma generator, electrion pin electrode (6) comprises 16 hollow stainless steel needles, 0.8mm, outer ring is ellipticity, is uniformly distributed 12 pin electrodes, is spaced apart 20mm, inner ring is 4, successively decrease in spray point electrode mind-set both sides in plate, left and right is all symmetric up and down, and the ventilating pit at pin electrode place is made with stainless steel microtubule 1.0mm * 4.0mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310615254.XA CN103613168B (en) | 2013-11-28 | 2013-11-28 | Method and system for recycling waste water by combining spark generation plasma with multistage membrane technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310678A (en) * | 2014-10-17 | 2015-01-28 | 南京大学 | Continuous catalytic plasma water pollution purification device |
| CN105110566A (en) * | 2015-09-11 | 2015-12-02 | 江苏大学 | Low-pollution type membrane separation device based on low-temperature plasma technology |
| CN105347553A (en) * | 2015-11-17 | 2016-02-24 | 南京麦得文环保科技有限公司 | LED industrial chip production wastewater processing system and processing method |
| CN112880968A (en) * | 2021-01-15 | 2021-06-01 | 哈尔滨工程大学 | Experimental device for many spark bubbles research in shear flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103102042A (en) * | 2012-10-19 | 2013-05-15 | 郑州江河环保技术有限公司 | Treatment process and device for wastewater containing benzene |
| CN103145284A (en) * | 2013-01-24 | 2013-06-12 | 南京大学 | Multi-functional water purifier integrated with activated carbon and low-temperature plasma |
| CN203625089U (en) * | 2013-11-28 | 2014-06-04 | 南通大学 | Wastewater recycling system of spark discharge plasma synergistic multi-level membrane technology |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102042A (en) * | 2012-10-19 | 2013-05-15 | 郑州江河环保技术有限公司 | Treatment process and device for wastewater containing benzene |
| CN103145284A (en) * | 2013-01-24 | 2013-06-12 | 南京大学 | Multi-functional water purifier integrated with activated carbon and low-temperature plasma |
| CN203625089U (en) * | 2013-11-28 | 2014-06-04 | 南通大学 | Wastewater recycling system of spark discharge plasma synergistic multi-level membrane technology |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310678A (en) * | 2014-10-17 | 2015-01-28 | 南京大学 | Continuous catalytic plasma water pollution purification device |
| CN104310678B (en) * | 2014-10-17 | 2016-01-20 | 南京大学 | A kind of continous way catalyze plasma water pollutions refining plant |
| CN105110566A (en) * | 2015-09-11 | 2015-12-02 | 江苏大学 | Low-pollution type membrane separation device based on low-temperature plasma technology |
| CN105347553A (en) * | 2015-11-17 | 2016-02-24 | 南京麦得文环保科技有限公司 | LED industrial chip production wastewater processing system and processing method |
| CN105347553B (en) * | 2015-11-17 | 2018-07-13 | 南京麦得文环保科技有限公司 | A kind of LED industry chip production waste water treatment system and processing method |
| CN112880968A (en) * | 2021-01-15 | 2021-06-01 | 哈尔滨工程大学 | Experimental device for many spark bubbles research in shear flow |
| CN112880968B (en) * | 2021-01-15 | 2022-11-01 | 哈尔滨工程大学 | Experimental device for research on multi-spark bubbles in shear flow |
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| CN103613168B (en) | 2015-05-13 |
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