CN103708652B - Industrial wastewater treatment method - Google Patents
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- CN103708652B CN103708652B CN201410009191.8A CN201410009191A CN103708652B CN 103708652 B CN103708652 B CN 103708652B CN 201410009191 A CN201410009191 A CN 201410009191A CN 103708652 B CN103708652 B CN 103708652B
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Abstract
The invention relates to an industrial wastewater treatment method and belongs to the field of water treatment. The industrial wastewater treatment method comprises the steps that pretreated industrial wastewater enters a water tank to regulate the pH value of the wastewater; most of water enters an ultrafiltration membrane group from the water tank; after the water is treated by the ultrafiltration membrane group, a part of water in the ultrafiltration membrane group returns to the water tank again, and the pH value of the water is regulated; after most of water in the ultrafiltration membrane group is subjected to ultrafiltration treatment by the ultrafiltration membrane group, the treated water is fed into a resin adsorption group and is subjected to adsorption treatment; if tested to be qualified, the water subjected to adsorption treatment flows into a pure water tank; if tested to be not qualified, the water subjected to adsorption treatment is fed into the resin adsorption group and is subjected to adsorption treatment again; and when the level of the industrial wastewater in the water tank falls to a liquid level switch in the water tank, a part of water in the water tank is mixed with sludge and enters a sludge tank, the water and the sludge in the sludge tank enter a sludge bag, the water in the sludge bag is separated from the sludge by virtue of pressurization and enters a vessel, sewage in a container enters the water tank again, and the pH value is regulated. The method has the advantages of economy, practicability, energy saving, environmental protection, simple structure, stable running performance and high water recovery rate.
Description
Technical field
The present invention relates to a kind of process for treating industrial waste water, belong to water treatment field.
Background technology
Along with developing rapidly of industry, kind and the quantity of trade effluent rapidly increase, and the pollution of water body, also increasingly extensively with serious, threatens the health and safety of the mankind gradually.Containing the pollutent produced in the industrial production materials, intermediate product and the product that outflow with water and production process in trade effluent, these are all the major causes causing water pollution.Therefore, for protection of the environment, the water treatment system of exploitation trade effluent is particularly important.Water treatment system the trade effluent with pollution can be reached the water quality standard that can discharge of national regulation by a series of purifying treatment or recycle is used for industrial production again.
About water treatment system, have been reported in prior art, as Chinese invention patent (publication number: CN1473768A) relates to the technique of a kind of first-stage reverse osmosis and electric salt remover producing high purity water, its technique comprises the steps: that pretreated water is after softening agent is softening, add the pH value that NaOH regulates water inlet, then the cartridge filter of reverse osmosis is entered by pipeline, pretreated water is stable enters reverse osmosis high-pressure pump by pipeline, reverse osmosis membrane group is entered by pipeline after pressurization, directly intermediate water tank is put into by pipeline, pipeline is passed through again by middle water pump, major part is sent into electric salt remover and is carried out smart desalination, a part adds through piping the dense water circulation system be made up of pipeline, water circulating pump to, and the dense water of unnecessary circulation, through piping, after being pressurizeed, is again sent into reverse osmosis membrane group and carried out pro desalting by high-pressure pump, and the product water of electric salt remover, if test passes, flow into finished product water tank by pipeline, if test failure, then put back to intermediate water tank by pipeline.In this water technology, reverse osmosis membrane needs that joint is many, hydraulic pressure is high, failure rate and the probability that leaks relatively high; Complex structure, price are more expensive, and add that electric salt remover whole water technology energy consumption is higher, cost of water treatment is higher.
Summary of the invention
The defect that the present invention exists in for existing technique, provides one not need reverse osmosis membrane, and structure is simple, and good economy performance, energy consumption is low, and the rate of recovery of water is the process for treating industrial waste water of 100%.
Above-mentioned purpose of the present invention is implemented by the following technical programs: a kind of process for treating industrial waste water, the method comprises pretreated trade effluent and enters water tank adjust pH by pipeline by after the first electrically operated valve unlatching, second electrically operated valve is opened, most of water in water tank by pipeline by high-pressure pump pressurize and electrically operated valve open laggard enter ultra-filtration membrane group, after the process of ultra-filtration membrane group, a part of water in ultra-filtration membrane group is by pipeline, water tank adjust pH got back to again by water circulating pump, most of water in ultra-filtration membrane group is sent into resin absorption group by pipeline through water pump and is carried out adsorption treatment after ultra-filtration membrane group uf processing, through the water of adsorption treatment, if test passes, pure water water tank is flowed into by pipeline, if test failure, then send into resin absorption group by pipeline through water pump and again carry out adsorption treatment, when the trade effluent water level decreasing in water tank is to liquid level switch place in water tank, first electrically operated valve and the second electrically operated valve are all closed, 3rd electrically operated valve is opened simultaneously, a part of water in water tank confuses after mud is pressurizeed by sludge pump by pipeline and enters sludge box, close the 3rd electrically operated valve, water in sludge box and mud enter mud bag by pipeline, water process pressurization in mud bag is separated with mud and enters container by pipeline, and the sewage in container reenters water tank adjust pH by pipeline by motor-mount pump pressurization.
After the pretreated trade effluent of the present invention enters water tank adjust ph after being opened by the first electrically operated valve by pipeline, major part water is pressurizeed by high-pressure pump by pipeline, open the second electrically operated valve laggard enter ultra-filtration membrane group, part water confuses after mud pressurizeed by sludge pump by sludge pipe, open the 3rd electrically operated valve and enter sludge box, then mud bag is entered by pipeline, close the 3rd electrically operated valve, water in mud to be separated with mud through pressurization at mud bag and to enter container by pipeline, sewage in container reenters water tank adjust ph by pipeline by motor-mount pump pressurization, thus form the water-flow circuit in a mud, through the water of uf processing, major part is sent into resin absorption group and is carried out adsorption treatment, remainder water is again sent into ultra-filtration membrane group after again getting back to water tank adjust pH by pipeline, water circulating pump and is carried out uf processing, thus form the water-flow circuit on another ultra-filtration membrane, water through adsorption treatment sends into detector detection, test passes, flows into pure water water tank by pipeline, if test failure, then sends into resin absorption group by pipeline through water pump and again carries out adsorption treatment, thus form and the water-flow circuit of another resin absorption.Like this, trade effluent carries out the circulation gone round and begun again by the inventive method, thus realizes zero discharge of industrial waste water, greatly improves the utilization ratio of water.
As preferably, the water in described sludge box and mud control to enter in mud bag and container by vent valve and intake valve.When in water tank 90% water enter ultra-filtration membrane, dense water in water tank is about 10% when being down to liquid level switch, open the 3rd electrically operated valve on sludge pipe, close the intake valve in sludge box, and the vent valve opened in sludge box carries out spoil disposal, close the 3rd electrically operated valve on sludge pipe after 1min, open the intake valve in sludge box, and the vent valve of closing in sludge box, stop spoil disposal.
As preferably, described pretreated water enters by alkali and nano-calcium carbonate after water tank, and both weight ratios are 10:(1-2); The pH value of Water in Water Tanks controls at 8.0-9.0.The mass ratio of alkali and nano-calcium carbonate is 10:(1-2) time, in trade effluent, sedimentary generating rate is maximum, effectively can remove the Ni in trade effluent
+, Cu
2+, Zn
2+and Ca
3+ion.
As preferably, described alkali is the one of calcium hydroxide, sodium hydroxide, potassium hydroxide.Further preferably, described alkali is calcium hydroxide.Hydroxide radical on the one hand in calcium hydroxide can regulate the pH value of trade effluent, forms solid precipitation with most metals impurity simultaneously, and the calcium ion on the other hand in calcium hydroxide can not cause new pollution.
As preferably, described ultra-filtration membrane group adopts cannulated tunica fibrosa, and the external diameter of described cannulated tunica fibrosa is 4.0-5.0mm.In water pump feeding resin absorption group, adsorption treatment is carried out by pipeline by the water after ultra-filtration membrane uf processing, and the ion exchange resin in resin absorption group is easy to by organic substance and bacterial contamination, for ensureing that resin absorption group intermediate ion exchanges the long-term normal of mixed bed and uses, the crown_interception of ultra-filtration membrane is most important.The volume of smallest bacteria is approximately 0.02 micron, and the micropore of ultra-filtration membrane of the present invention only has 0.01 micron, therefore, water and small-molecule substance is only allowed to pass through, and the material that in trade effluent, volume is greater than film surface micropore footpath such as bacterium and the colloid, iron rust, suspended substance, silt, larger molecular organics etc. more much bigger than bacterium volume can be trapped in the liquid feeding side of film by ultra-filtration membrane, become concentrated solution to come back in water tank and process, so realize constantly purifying trade effluent, isolation and identification.
As preferably, described resin absorption group is made up of ion exchange resin mixed bed.The yin and yang resin ratio of ion exchangemixed bed is 2:1, be contained in a pressurized vessel, and fully mix, negative resin is had to surround around each positive resin, become anions and canons group, be equivalent to numerous yin, yang bed string together, trade effluent just can complete the process of many level anions and canons exchange by mixed bed, thus removes the zwitterion remaining trace in trade effluent.
The present invention has the following advantages:
1, the system architecture of process for treating industrial waste water of the present invention is simple, and operating performance is stablized, and the rate of recovery of water is high, can reach 100%.
2, economical and practical, the energy-conserving and environment-protective of process for treating industrial waste water of the present invention.
Accompanying drawing explanation
Accompanying drawing 1 is the schema of a kind of operational path of the present invention.
In figure, the 1, first electrically operated valve; 2, the second electrically operated valve; 3, the 3rd electrically operated valve; 4, liquid level switch; 10, water tank; 20, ultra-filtration membrane group; 21, high-pressure pump; 30, resin absorption group; 40, detector; 50, sludge box; 51, sludge pump; 52, intake valve; 53, vent valve; 60, mud bag; 70, container; 71, motor-mount pump.
Embodiment
Be below specific embodiments of the invention, and accompanying drawings is further described technical scheme of the present invention, but the present invention is not limited to these embodiments.
Embodiment 1:
Pretreated trade effluent enters in water tank 10 by pipeline after the first electrically operated valve 1 is opened, regulate the pH value of this trade effluent by the mixed solution be placed in water tank 10 and its pH value is adjusted to 8, mixed solution is that the calcium hydroxide of (10:1) and nano-calcium carbonate form by mass ratio, mud is had because trade effluent mixes, entering after in water tank 10, mud proportion in water tank 10 is greater than trade effluent, sludgd deposition is bottom water tank 10, therefore the trade effluent in water tank 10 is divided into two-layer gradually, lower floor is the trade effluent carrying a large amount of mud, upper strata is the trade effluent without mud, when the second electrically operated valve 2 is opened, in water tank 10, the trade effluent on upper strata flows into ultra-filtration membrane group 20 through pipeline by high-pressure pump 21 pressurization, the hollow-fibre membrane that ultra-filtration membrane group 20 is 4mm by external diameter forms, after ultra-filtration membrane group 20 uf processing, part trade effluent to get back to water tank 10 in also adjust pH again by pipeline again through water circulating pump, major part trade effluent flows in resin absorption group 30 by pipeline through water pump, water after resin absorption group 30 adsorption treatment flows in detector 40 through pipeline, if test passes, water flows into pure water water tank 10 by pipeline, if test failure, then to be fed through in resin absorption group 30 through water pump by pipeline and again to carry out adsorption treatment, when the trade effluent water level decreasing in water tank 10 is to liquid level switch 4 place in water tank 10, first electrically operated valve 1 and the second electrically operated valve 2 are all closed, 3rd electrically operated valve 3 is opened simultaneously, intake valve 52 in sludge box 50 cuts out, vent valve 53 is opened, open due to the vent valve 53 in sludge box 50 and the air in sludge box 50 is discharged, therefore the air pressure in sludge box 50 is less than the air pressure in water tank 10, under the effect of draught head, the trade effluent (namely in water tank 10, lower floor carries the trade effluent of a large amount of mud) remained in water tank 10 flows in sludge box 50 by pipeline through sludge pump 51, after after one minute, 3rd electrically operated valve 3 is closed, first electrically operated valve 1 is opened and is made pending trade effluent again flow in water tank 10, second valve is also opened and makes the trade effluent in water tank 10 flow in ultra-filtration membrane group 20 simultaneously, while the 3rd electrically operated valve 3 is closed, intake valve 52 in sludge box 50 is opened, vent valve 53 is closed, by intake valve 52 by the air intake in the external world in sludge box 50, therefore the air pressure of sludge box 50 increases gradually, under the influence of air pressure, trade effluent in sludge box 50 is driven into in mud bag 60 together with mud by pipeline, by sludge box 50 and mud bag 60 draught head between the two the trade effluent in mud bag 60 extruded in mud bag 60 and make it flow in container 70, mud is then trapped in mud bag 60, flow into trade effluent in container 70 to reenter after being pressurizeed by motor-mount pump 71 in water tank 10 regulate pH value by pipeline again.
Embodiment 2:
Pretreated trade effluent enters in water tank 10 by pipeline after the first electrically operated valve 1 is opened, regulate the pH value of this trade effluent by the mixed solution be placed in water tank 10 and its pH value is adjusted to 8.5, mixed solution is that the calcium hydroxide of (10:1.5) and nano-calcium carbonate form by mass ratio, mud is had because trade effluent mixes, entering after in water tank 10, mud proportion in water tank 10 is greater than trade effluent, sludgd deposition is bottom water tank 10, therefore the trade effluent in water tank 10 is divided into two-layer gradually, lower floor is the trade effluent carrying a large amount of mud, upper strata is the trade effluent without mud, when the second electrically operated valve 2 is opened, in water tank 10, the trade effluent on upper strata flows into ultra-filtration membrane group 20 through pipeline by high-pressure pump 21 pressurization, the hollow-fibre membrane that ultra-filtration membrane group 20 is 4.5mm by external diameter forms, after ultra-filtration membrane group 20 uf processing, part trade effluent to get back to water tank 10 in also adjust pH again by pipeline again through water circulating pump, major part trade effluent flows in resin absorption group 30 by pipeline through water pump, water after resin absorption group 30 adsorption treatment flows in detector 40 through pipeline, if test passes, water flows into pure water water tank 10 by pipeline, if test failure, then to be fed through in resin absorption group 30 through water pump by pipeline and again to carry out adsorption treatment, when the trade effluent water level decreasing in water tank 10 is to liquid level switch 4 place in water tank 10, first electrically operated valve 1 and the second electrically operated valve 2 are all closed, 3rd electrically operated valve 3 is opened simultaneously, intake valve 52 in sludge box 50 cuts out, vent valve 53 is opened, open due to the vent valve 53 in sludge box 50 and the air in sludge box 50 is discharged, therefore the air pressure in sludge box 50 is less than the air pressure in water tank 10, under the effect of draught head, the trade effluent (namely in water tank 10, lower floor carries the trade effluent of a large amount of mud) remained in water tank 10 flows in sludge box 50 by pipeline through sludge pump 51, after after one minute, 3rd electrically operated valve 3 is closed, first electrically operated valve 1 is opened and is made pending trade effluent again flow in water tank 10, second valve is also opened and makes the trade effluent in water tank 10 flow in ultra-filtration membrane group 20 simultaneously, while the 3rd electrically operated valve 3 is closed, intake valve 52 in sludge box 50 is opened, vent valve 53 is closed, by intake valve 52 by the air intake in the external world in sludge box 50, therefore the air pressure of sludge box 50 increases gradually, under the influence of air pressure, trade effluent in sludge box 50 is driven into in mud bag 60 together with mud by pipeline, by sludge box 50 and mud bag 60 draught head between the two the trade effluent in mud bag 60 extruded in mud bag 60 and make it flow in container 70, mud is then trapped in mud bag 60, flow into trade effluent in container 70 to reenter after being pressurizeed by motor-mount pump 71 in water tank 10 regulate pH value by pipeline again.
Embodiment 3:
Pretreated trade effluent enters in water tank 10 by pipeline after the first electrically operated valve 1 is opened, regulate the pH value of this trade effluent by the mixed solution be placed in water tank 10 and its pH value is adjusted to 9, mixed solution is that the calcium hydroxide of (10:2) and nano-calcium carbonate form by mass ratio, mud is had because trade effluent mixes, entering after in water tank 10, mud proportion in water tank 10 is greater than trade effluent, sludgd deposition is bottom water tank 10, therefore the trade effluent in water tank 10 is divided into two-layer gradually, lower floor is the trade effluent carrying a large amount of mud, upper strata is the trade effluent without mud, when the second electrically operated valve 2 is opened, in water tank 10, the trade effluent on upper strata flows into ultra-filtration membrane group 20 through pipeline by high-pressure pump 21 pressurization, the hollow-fibre membrane that ultra-filtration membrane group 20 is 5mm by external diameter forms, after ultra-filtration membrane group 20 uf processing, part trade effluent to get back to water tank 10 in also adjust pH again by pipeline again through water circulating pump, major part trade effluent flows in resin absorption group 30 by pipeline through water pump, water after resin absorption group 30 adsorption treatment flows in detector 40 through pipeline, if test passes, water flows into pure water water tank 10 by pipeline, if test failure, then to be fed through in resin absorption group 30 through water pump by pipeline and again to carry out adsorption treatment, when the trade effluent water level decreasing in water tank 10 is to liquid level switch 4 place in water tank 10, first electrically operated valve 1 and the second electrically operated valve 2 are all closed, 3rd electrically operated valve 3 is opened simultaneously, intake valve 52 in sludge box 50 cuts out, vent valve 53 is opened, open due to the vent valve 53 in sludge box 50 and the air in sludge box 50 is discharged, therefore the air pressure in sludge box 50 is less than the air pressure in water tank 10, under the effect of draught head, the trade effluent (namely in water tank 10, lower floor carries the trade effluent of a large amount of mud) remained in water tank 10 flows in sludge box 50 by pipeline through sludge pump 51, after after one minute, 3rd electrically operated valve 3 is closed, first electrically operated valve 1 is opened and is made pending trade effluent again flow in water tank 10, second valve is also opened and makes the trade effluent in water tank 10 flow in ultra-filtration membrane group 20 simultaneously, while the 3rd electrically operated valve 3 is closed, intake valve 52 in sludge box 50 is opened, vent valve 53 is closed, by intake valve 52 by the air intake in the external world in sludge box 50, therefore the air pressure of sludge box 50 increases gradually, under the influence of air pressure, trade effluent in sludge box 50 is driven into in mud bag 60 together with mud by pipeline, by sludge box 50 and mud bag 60 draught head between the two the trade effluent in mud bag 60 extruded in mud bag 60 and make it flow in container 70, mud is then trapped in mud bag 60, flow into trade effluent in container 70 to reenter after being pressurizeed by motor-mount pump 71 in water tank 10 regulate pH value by pipeline again.
Embodiment 4:
Pretreated trade effluent enters in water tank 10 by pipeline after the first electrically operated valve 1 is opened, regulate the pH value of this trade effluent by the mixed solution be placed in water tank 10 and its pH value is adjusted to 8, mixed solution is that the calcium hydroxide of (10:2) and nano-calcium carbonate form by mass ratio, mud is had because trade effluent mixes, entering after in water tank 10, mud proportion in water tank 10 is greater than trade effluent, sludgd deposition is bottom water tank 10, therefore the trade effluent in water tank 10 is divided into two-layer gradually, lower floor is the trade effluent carrying a large amount of mud, upper strata is the trade effluent without mud, when the second electrically operated valve 2 is opened, in water tank 10, the trade effluent on upper strata flows into ultra-filtration membrane group 20 through pipeline by high-pressure pump 21 pressurization, the hollow-fibre membrane that ultra-filtration membrane group 20 is 4mm by external diameter forms, after ultra-filtration membrane group 20 uf processing, part trade effluent to get back to water tank 10 in also adjust pH again by pipeline again through water circulating pump, major part trade effluent flows in resin absorption group 30 by pipeline through water pump, water after resin absorption group 30 adsorption treatment flows in detector 40 through pipeline, if test passes, water flows into pure water water tank 10 by pipeline, if test failure, then to be fed through in resin absorption group 30 through water pump by pipeline and again to carry out adsorption treatment, when the trade effluent water level decreasing in water tank 10 is to liquid level switch 4 place in water tank 10, first electrically operated valve 1 and the second electrically operated valve 2 are all closed, 3rd electrically operated valve 3 is opened simultaneously, intake valve 52 in sludge box 50 cuts out, vent valve 53 is opened, open due to the vent valve 53 in sludge box 50 and the air in sludge box 50 is discharged, therefore the air pressure in sludge box 50 is less than the air pressure in water tank 10, under the effect of draught head, the trade effluent (namely in water tank 10, lower floor carries the trade effluent of a large amount of mud) remained in water tank 10 flows in sludge box 50 by pipeline through sludge pump 51, after after one minute, 3rd electrically operated valve 3 is closed, first electrically operated valve 1 is opened and is made pending trade effluent again flow in water tank 10, second valve is also opened and makes the trade effluent in water tank 10 flow in ultra-filtration membrane group 20 simultaneously, while the 3rd electrically operated valve 3 is closed, intake valve 52 in sludge box 50 is opened, vent valve 53 is closed, by intake valve 52 by the air intake in the external world in sludge box 50, therefore the air pressure of sludge box 50 increases gradually, under the influence of air pressure, trade effluent in sludge box 50 is driven into in mud bag 60 together with mud by pipeline, by sludge box 50 and mud bag 60 draught head between the two the trade effluent in mud bag 60 extruded in mud bag 60 and make it flow in container 70, mud is then trapped in mud bag 60, flow into trade effluent in container 70 to reenter after being pressurizeed by motor-mount pump 71 in water tank 10 regulate pH value by pipeline again.
Process for treating industrial waste water of the present invention can reclaim and utilize trade effluent in 100% ground, has saved water resources, and treatment process is simple, and less investment, cost is low, has good economy and environment benefit.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (3)
1. a process for treating industrial waste water, it is characterized in that: the method comprise enter water tank after pretreated trade effluent is opened by the first electrically operated valve by pipeline after be alkali and the nano-calcium carbonate calcium solution adjust pH of 10:1 ~ 10:2 by weight ratio, the pH value of Water in Water Tanks controls at 8.0-9.0;
Second electrically operated valve is opened, most of water in water tank by pipeline by high-pressure pump pressurize and electrically operated valve open laggard enter ultra-filtration membrane group, after the process of ultra-filtration membrane group, a part of water in ultra-filtration membrane group gets back to water tank adjust pH again by pipeline, water circulating pump, and the most of water in ultra-filtration membrane group is sent into resin absorption group by pipeline through water pump and carried out adsorption treatment after ultra-filtration membrane group uf processing;
Through the water of adsorption treatment, if test passes, flow into pure water water tank by pipeline, if test failure, then send into resin absorption group by pipeline through water pump and again carry out adsorption treatment;
When the trade effluent water level decreasing in water tank is to liquid level switch place in water tank, first electrically operated valve and the second electrically operated valve are all closed, 3rd electrically operated valve is opened simultaneously, a part of water in water tank confuses after mud is pressurizeed by sludge pump by pipeline and enters sludge box, close the 3rd electrically operated valve, water in sludge box and mud enter mud bag by pipeline, water process pressurization in mud bag is separated with mud and enters container by pipeline, and the sewage in container reenters water tank adjust pH by pipeline by motor-mount pump pressurization;
Wherein, described alkali is the one of calcium hydroxide, sodium hydroxide, potassium hydroxide; Described ultra-filtration membrane group employing external diameter is the cannulated tunica fibrosa of 4.0-5.0mm; Described resin absorption group is made up of ion exchange resin mixed bed.
2. process for treating industrial waste water according to claim 1, is characterized in that: the water in described sludge box and mud control to enter in mud bag and container by vent valve and intake valve.
3. process for treating industrial waste water according to claim 2, is characterized in that: when the 3rd electrically operated valve is opened, the intake valve in sludge box cuts out, exhaust valve opening, when the 3rd electrically operated valve is closed, and the inlet open in sludge box, exhaust valve closure.
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| CN201410009191.8A CN103708652B (en) | 2014-01-08 | 2014-01-08 | Industrial wastewater treatment method |
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| CN201410009191.8A CN103708652B (en) | 2014-01-08 | 2014-01-08 | Industrial wastewater treatment method |
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| CN104711657A (en) * | 2015-03-10 | 2015-06-17 | 宁波恺谱瑞膜科技有限公司 | Secondary filtration method of ultra-filtration membrane for electroplate liquid |
| CN106587457A (en) * | 2016-11-14 | 2017-04-26 | 无锡艾科瑞思产品设计与研究有限公司 | Purification and detection supplying equipment of tap water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219838A (en) * | 2008-01-25 | 2008-07-16 | 北京交通大学 | Method for processing heavy metal industrial waste water with low concentration |
| CN101434444A (en) * | 2007-11-16 | 2009-05-20 | 中国石油化工股份有限公司 | Membrane bioreactor and use thereof in wastewater treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434444A (en) * | 2007-11-16 | 2009-05-20 | 中国石油化工股份有限公司 | Membrane bioreactor and use thereof in wastewater treatment |
| CN101219838A (en) * | 2008-01-25 | 2008-07-16 | 北京交通大学 | Method for processing heavy metal industrial waste water with low concentration |
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