CN101792239B - Method for treatment of waste emulsion - Google Patents
Method for treatment of waste emulsion Download PDFInfo
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- CN101792239B CN101792239B CN2010101369509A CN201010136950A CN101792239B CN 101792239 B CN101792239 B CN 101792239B CN 2010101369509 A CN2010101369509 A CN 2010101369509A CN 201010136950 A CN201010136950 A CN 201010136950A CN 101792239 B CN101792239 B CN 101792239B
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Abstract
The invention discloses a method for the treatment of waste emulsion, more particularly a method for the treatment of waste emulsion generated in the machining processes such as cutting, grinding and the like. The method comprises the following steps: separation of stored emulsion breakers, mechanical air flotation, ion-carbon electrolysis, coagulating sedimentation, oil separation with inclined plate, microorganism purification, sedimentation, sand filtering, etc.; the method has the advantages of simple technology and standard-reaching wastewater, and devices for the implementation of the method have small floor area, little investment, low running cost, low energy consumption, maximal recycling of waste oil resource and prominent operability and is widely suitable for machining and the treatment of waste emulsion in other industries. The waste oil recycled according to the method is completely capable of being used for the production of patented product, the protective grease, thus idealized application of resources is achieved.
Description
Technical field
The present invention relates to a kind of treatment process of waste emulsified mixture, the treatment process of the waste emulsified mixture that particularly cuts, produces in the course of processing such as grinding belongs to the liquid waste disposal technique field.
Background technology
China is the country of a shortage of water resources, is classified as one of 13 poor-water countries by United Nations; Simultaneously, the waters of China also is faced with the pressure of water pollution always, and wherein trade effluent is the important source of pollution in waters.Emulsion mainly is made up of 2～10% the mineral oil and emulsifying agent, additive (chlorine, sulphur, phosphorus etc.) and the water of anionic or non-ionic type, have cooling, lubricated, cleaning, effect such as antirust, be discharged through causing rotten after the operations such as cold rolling, broaching, fraising, polishing, smooth, cutting.Waste emulsified mixture is as first of the trade effluent, and it comes source distribution also very extensive, mainly in mechanical workout industry, especially produces in the cutting of bearing and auto parts machinery processing enterprise, attrition process process.Along with developing rapidly of industry, the quantity discharged of this oily(waste)water and day sharp increase.Oily substance in the waste emulsified mixture floats on the water surface, forms oil film, stops airborne oxygen soluble in water, causes hydrobiont dead because of anoxic, finally makes water body degenerate contaminate environment.Waste emulsified mixture is except that the harm with general oily(waste)water, because the effect of tensio-active agent, the machinery oil high dispersing is in water, animals and plants, the easier absorption of hydrobiont, and tensio-active agent itself is also harmful to biology, also can make some water-fast toxic substances dissolved, finally enter human body by different approach, the health of serious harm human body.
Because contain the tensio-active agent of some amount in the emulsion, it is firm especially to make that oil molecule and water molecules get, so the waste emulsified mixture processing is a kind of of sense difficulty in the wastewater treatment.Existing waste emulsified mixture method of disposal has settling process, burning method, air supporting method etc., and settling process mainly is to make the profit simple separation by adding emulsion splitter, obtains the oil slick on upper strata, and this technology is simple, but the DeGrain of disposing, and can produce the pollution of secondary water.Burning method is with high-temperature incinerator waste emulsified mixture to be carried out perfect combustion, this technology energy base conditioning waste emulsified mixture, and the burning but the mineral oil that contains in the waste liquid then is wasted can not fully be recycled.The air supporting method is with mechanical blower waste emulsified mixture to be carried out air blast to stir, utilize small bubbles as the oleaginous materials in the carrier adhesion waste liquid, make its buoyancy greater than resistance, oleaginous materials floats on liquid level on then, thereby collecting oil slick recycles, but (the COD value is meant under certain condition the COD value in the waste liquid, the amount of the oxygenant that reducing substances consumed in the oxidation one premium on currency sample, be called chemical oxygen demand (COD), it has reflected the degree that polluted by reducing substances) still higher, can not reach ideal and dispose effect.
Chinese patent 200810089391.3 discloses a kind of device that adopts the method for the multiple class waste emulsified mixture of ultrafiltrationmembrane process processing high density and realize this method, and its main body invented technology is " air-dissolving air-float-ultra-filtration membrane-electrofloatation ".Utilize the disposal of twice air supporting, isolate more oil slick waste emulsified mixture; By ultra-filtration membrane waste water is carried out filtering separation, next step disposal is carried out in water outlet, alleviates the difficulty of follow-up disposal, and this technology has the following disadvantages: the film of disposing waste emulsified mixture will regularly replace, and makes that equipment running cost is bigger; The ultrafiltration water outlet need add emulsion splitter once more and carry out breakdown of emulsion; Standby charcoal absorption system increases the input at equipment initial stage equally.
Summary of the invention
The objective of the invention is to overcome existing above-mentioned deficiency in the prior art, a kind of treatment process of waste emulsified mixture is provided and realizes the device of this method.
Technical scheme of the present invention is:
A kind of treatment process of waste emulsified mixture comprises following processing step:
(1) pre-treatment:
Place the pond, ground to filter solid shape impurity the waste emulsified mixture of collecting, the waste emulsified mixture of removing behind the solid shape impurity is pumped into the pre-treatment jar, add CaCl
2And Al
2(SO
4)
3, being heated to 55 ℃～80 ℃, breakdown of emulsion under agitation stirs standing sedimentation 10～15h behind 1～2h, separates, and reclaims oil phase;
(2) mechanical air flotation:
Waste liquid behind the Separation and Recovery oil phase changes with lift pump expects that carrying out air supporting to the mechanical air flotation system handles, pneumatically supported volume pressure is 0.2～0.5MPa, the volume ratio of molten gas and waste liquid is 1:20～30, reclaims oleaginous materials and further utilizes, and the waste water behind the separation oleaginous materials enters equalizing tank;
(3) iron carbon electrolysis:
The waste water of equalizing tank enters iron carbon electrolysis cells, pH value to 2～4 of regulator solution, electrolysis 30～50min under the normal temperature; Utilize the electrode reaction product that the organic pollutant in the waste water is activated, convert thereof into non-poisonous material, reduce the COD value of waste water, the content of oils;
(4) secondary wastewater treatment:
Iron carbon electrolysis water outlet, pumps into the secondary Waste Water Treatment after compiling with trade effluent and handles in sewage-collecting well by pipe influx:
With lift pump the waste water in the sewage-collecting well is pumped in the distributing reservoir, adds water glass and flocculate, add water glass quality be 0.3～0.7% of waste water;
Waste water behind the sediment separate out enters the inclined plate grease pond and further separates oil slick, waste water behind the separation oil slick enters the microbially decontaminate system, organism in the waste water is degraded by microorganisms, after the settling bowl sedimentation, enter the sand filtration system, flow into industrial impounding reservoir behind the stone sand of water after the degraded in the sand filtration system, the activated carbon filtration recycling, and the microorganism of settling bowl lower floor returns and is used for purification system and recycles.
The described solid shape impurity of step (1) is solid substances such as the cotton yarn that contains in the waste emulsified mixture, iron filings, paper scrap.
In the treatment process of above-mentioned waste emulsified mixture, CaCl in the step (1)
2And Al
2(SO
4)
3Consumption be respectively 0.1～0.6% and 0.2～0.5% of waste emulsified mixture weight.
Waste emulsified mixture after the removal of impurities can enter and enter the pre-treatment jar again after the waste emulsified mixture hold-up vessel long-term storage and carry out pre-treatment.
The mass ratio of iron filings, carbon granules is iron filings: carbon granules=1:1～3:1 in the middle iron carbon electrolysis cells of above-mentioned steps (3), carries out electrolytic reaction under acidic conditions, and the pH value of solution is controlled in 2～4 scopes.
Microorganism described in the above-mentioned steps (4) is whiterot fungi (production of HuaTe Science Sichuan Genie et Environnement), and this bacterium is strong to the adaptability of various waste water, and the self-reproduction growth rapidly, and is fast to organic katabolism speed.
The device of realizing above-mentioned technology comprises pond, ground, hold-up vessel, pre-treatment jar, mechanical air flotation device, equalizing tank, iron carbon electrolysis cells, sewage-collecting well, distributing reservoir, inclined plate grease pond, microbially decontaminate treatment system, settling bowl, sand filtration system, between ground pond and the hold-up vessel, between hold-up vessel and the pre-treatment jar, between pre-treatment jar and the iron carbon electrolysis cells, also be provided with lift pump between sewage-collecting well and the distributing reservoir, be connected by pipeline between respectively installing.
Described microbially decontaminate treatment system comprises microbially decontaminate system pool body, the two side, front and back of pond body is respectively arranged with water-in, water outlet, be installed with in the body of pond in order to load the support frame of microorganism, described support frame is a tridimensional network, the bottom of support frame is provided with many aeration flexible pipes arranged side by side, and described aeration flexible pipe is fixed in the bottom of support frame by the aeration flexible pipe positioning pipe.Described microbially decontaminate system makes the organism in the waste water degrade by microbiological oxidation by the aeration flexible pipe oxygen supply, and waste water is purified.
The pond body inwall of described microbially decontaminate treatment system also is provided with at least one and selects the stream plate.Select the left and right sides wall that the stream plate is fixed in the pond body, the pond body is separated into relatively independent two or more Xiao Chi bodies of end sealing, end connection, the waste water that enters the microbially decontaminate treatment system carries out microbially decontaminate successively in each Xiao Chi body handles, and can improve the efficient that microbially decontaminate is handled.
Described iron carbon electrolysis cells comprises at least one electrolyzer, electrolyzer sidewall, diapire are respectively arranged with water-in, water outlet, the electrolyzer bottom also is provided with female pipe of the gas distribution that is connected and aeration flexible pipe, the female pipe of described gas distribution is connected with mechanical blower, is disposed with cobble supporting layer, iron filings layer and active carbon layer in the electrolyzer from bottom to top.Waste water enters electrolyzer after overregulating the pH value, under the effect of mechanical blower, to the electrolyzer aeration, to reach the electrolytic action that increases iron carbon, reach the effect that reduces organic content in the waste water after the female pipe of gas distribution divides gas.
Described settling bowl is a circular pond, the pool wall inboard of settling bowl is provided with the annular exhalent canal, the center of settling bowl is provided with a central draft tube, described central draft tube is connected with water inlet pipe, the below of central draft tube is provided with a leg-of-mutton reflector, flow into from water inlet pipe by the waste water after the disposal of microbially decontaminate system, downward through the center thrust-augmenting nozzle, outwards flow out ringwise after meeting reflector, the settled stillness of night of process outwards overflows gradually, finally flow out through exhalent canal, settled mud is returned to the microbially decontaminate pond through reflux pump and carries out recycle, and the intermediary pond can be used as the view use.
Described sand filtration system comprises a pond body, and pond body inner bottom part is provided with recoil tracheae, cobble filtering layer, cotton pad filtering layer, activated carbon filter layer.Pebble bed is mainly isolated solid impurity, and usefulness is filtered less impurity to cotton bed course simultaneously as laying pebble bed, active carbon layer absorption minute impurities, and the recoil tracheae mainly is when being used for the filtering layer obstruction, to increase the effect that air blast reaches the mediation filtering layer.
The present invention will remove the waste emulsified mixture CaCl behind the solid substance impurity
2And Al
2(SO
4)
3Carry out pre-treatment, pretreated waste emulsified mixture enters the mechanical air flotation system, owing to passed through the demulsification of emulsion splitter, waste emulsified mixture more easily with bubble as carrier, adhere to the oleaginous materials in the waste liquid, make its buoyancy, float on liquid level on the oleaginous materials greater than resistance, recycle thereby collect oil slick, reduce oils content in the waste water.Waste emulsified mixture after air supporting is handled enters iron carbon electrolysis cells, because the difference in Electrode Potential between iron and the carbon can form numerous little galvanic cell in the waste water, wherein the iron that current potential is low becomes anode, the carbon that current potential is high becomes negative electrode, under acidic conditions electrochemical reaction takes place, and its reaction process is as follows:
Anode (Fe): Fe-2e → Fe
2+,
Negative electrode (C): 2H
++ 2e → 2[H] → H
2,
From reaction, find out, produced the Fe of status nascendi in the electrolytic process
2+And nascent state [H], they are to have high chemically reactive, can change many organic structures and characteristic in the waste water, make effects such as organism generation chain rupture, open loop, organism is destroyed, make it become simple non-poisonous material, thereby reach the purpose that reduces the COD value.As long as the temperature of reaction of iron carbon electrolysis cells reaches the treatment effect that normal temperature just can arrive expection, temperature improves, and can accelerate by electrolytic speed.
The electrolysis water outlet enters the secondary Waste Water Treatment and handles, the device of secondary Waste Water Treatment comprises sewage-collecting well, distributing reservoir, the inclined plate grease pond, the microbially decontaminate system, settling bowl, the sand filtration system, produce water reservoir, waste water after distributing reservoir carries out flocculation sediment is through the laggard biological purification system in a subtle way of the further oil removing in inclined plate grease pond, carry out disaggregating treatment through whiterot fungi, adopt convective exchange, the following current blended contacts principle entirely, this bacterium can round-the-clock dispose of wastewater, can be not dead because of reusing after stagnating, (seeing accompanying drawing 4), most organism after handling through the hydrolysis chain rupture are easy to be resolved into by bacterial oxidation materials such as water and carbonic acid gas, part organism is absorbed as nutrition source by microorganism, thereby the organism in the waste water is degraded.Water outlet after the processing enters settling bowl, does not then continue to dispose through pipe flow will to sewage-collecting well if water outlet is up to standard.
The oil slick of each collection step all is used to make the patented product barrier cream in present method after processing treatment, realizes the theory that turns waste into wealth.Technology of the present invention is simple, wastewater to reach standard, and realize that its floor space of device of this invention is little, and less investment, running cost is low, and energy consumption is low, and the waste oil resource is reclaimed in maximization, has tangible operability.When utilizing method and apparatus of the present invention, one time breakdown of emulsion just can make oily water separation, reaches the ideal demulsification; Microbially decontaminate can separate the organism in the waste water fully to the disposal of waste water; Last sand filtration system can remove by filter the fine suspended substance that remains in the water.If only through breakdown of emulsion, then the COD value can not significantly reduce; If only through the electrolysis of iron carbon, then the COD value can reduce, but can not reach the ideal standard; If only pass through microbially decontaminate, then the COD value also can reduce, but can not reach the ideal standard, have only comprehensive utilization, can make just that indexs such as COD value, petroleum content can reach national sewage comprehensive emission standard (GB8978-1996) fully in the waste water by each stage among the present invention.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is a microbially decontaminate system architecture side schematic view.
Fig. 3 is a microbially decontaminate system vertical view.
Fig. 4 contacts principle schematic entirely for convective exchange, the following current blended of microbially decontaminate treatment system;
Fig. 5 is an iron carbon electrolysis cells structural representation
Fig. 6 is an iron carbon electrolysis cells vertical view.
Fig. 7 is the settling bowl structural representation
Fig. 8 is the settling bowl vertical view.
Fig. 9 is a sand filtration system architecture synoptic diagram.
Mark among the figure: 1 is waste emulsified mixture, and 2 is the pond, ground, and 3,5,9,15 is lift pump, and 4 is waste emulsified mixture long period hold-up vessel, and 6 is waste emulsified mixture pre-treatment jar, and 7,8 are respectively high-efficient demulsifier CaCl
2And Al
2(SO
4)
3, 10 is the mechanical air flotation system, 11 is equalizing tank, 12 is iron carbon electrolysis cells, and 13 is sewage-collecting well, and 14 is trade effluent, 16 is distributing reservoir, and 17 is the efficient flocculant water glass, and 18 is the inclined plate grease pond, 19 is the microbially decontaminate system, and 20 is settling bowl, and 21 are waste water not up to standard, 22 is microorganism, 23 are the sand filtration system, and 24 is industrial impounding reservoir, 25-secondary Waste Water Treatment;
1901 is the water-in of microbially decontaminate system, and 1902 is the filler support frame, and 1903 for selecting the stream plate, 1904 is the water outlet of microbially decontaminate system, 1905 is aeration flexible pipe, and 1906 is the aeration flexible pipe positioning pipe, and 1907 is the mechanical blower of microbially decontaminate system; 1908 is the pond body of microbially decontaminate system;
1201 is the water-in of iron carbon electrolysis cells, and 1202 is active carbon layer, and 1203 is the iron filings layer, 1204 is the cobble supporting layer, and 1205 is aeration tube, and 1206 is the water outlet of iron carbon electrolysis cells, 1205 is aeration tube, and 1207 is the female pipe of gas distribution, and 1208 is the mechanical blower of iron carbon electrolysis cells; 1209 is electrolyzer;
2001 is the settling bowl water inlet pipe, and 2002 is central draft tube, and 2003 is reflector, and 2004 is mud, and 2005 is rising pipe, and 2006 is the settling bowl pool wall, and 2007 is the view pond, and 2008 is exhalent canal;
2301 are the water inlet pipe of sand filtration system, and 2302 is activated carbon filter layer, and 2303 is cotton pad filtering layer, and 2304 is the cobble filtering layer, and 2305 is boulder bed, and 2306 are recoil tracheae, 2307 rising pipes.
Embodiment
The present invention is described in further detail below in conjunction with embodiment.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, allly all belong to scope of the present invention based on the technology that content of the present invention realized.
A kind of treatment process of waste emulsified mixture comprises following processing step:
(1) pre-treatment:
Place pond, ground 2 to filter solid shape impurity the waste emulsified mixture of collecting 1, start lift pump 3, the waste emulsified mixture of removing behind the solid shape impurity is pumped into pre-treatment jar 4, after treating that liquid level reaches the height of setting, start lift pump 5 waste emulsified mixture is promoted to pre-treatment jar 6, add high-efficient demulsifier 7,8, i.e. CaCl
2And Al
2(SO
4)
3, being heated to 55 ℃～80 ℃, breakdown of emulsion under agitation stirs standing sedimentation 10～15h behind 1～2h, separates, and reclaims oil phase;
(2) mechanical air flotation:
Waste liquid behind the Separation and Recovery oil phase changes with lift pump 9 expects that carrying out air supporting to mechanical air flotation system 10 handles, pneumatically supported volume pressure is 0.2～0.5MPa, the volume ratio of molten gas and waste liquid is 1:20～30, reclaims oleaginous materials and further utilizes, and the waste water behind the separation oleaginous materials enters equalizing tank 11;
(3) iron carbon electrolysis:
The waste water of equalizing tank 11 enters iron carbon electrolysis cells 12, pH value to 2～4 of regulator solution, electrolysis 30～50min under the normal temperature; Utilize the electrode reaction product that the organic pollutant in the waste water is activated, convert thereof into non-poisonous material, reduce the COD value of waste water, the content of oils;
(4) secondary wastewater treatment:
Iron carbon electrolysis water outlet by pipe influx in sewage-collecting well 13, pumping into secondary Waste Water Treatment 25 after compiling with trade effluent 14 handles: 1 starts lift pump 15 delivers to distributing reservoir 16 with waste water, and add flocculation agent water glass 17, add water glass quality be 0.3～0.7% of waste water; Fully enter inclined plate grease pond 18 after the reaction and remove the upper strata oil slick, enter microbially decontaminate system 19 again, waste water after the disposal flow to settling bowl 20, record the qualified back of index clear water and enter sand filtration system 23, not up to standardly then flow to sewage-collecting well 13 through pipeline 21, and the microorganism 22 that falls to the bottom is returned to 19 recycles of microbially decontaminate system, and finally handling water after up to standard, to enter industrial impounding reservoir 24 stand-by.
In the treatment process of above-mentioned waste emulsified mixture, CaCl in the step (1)
2And Al
2(SO
4)
3Consumption be respectively 0.1～0.6% and 0.2～0.5% of waste emulsified mixture weight.
The mass ratio of iron filings, carbon granules is iron filings: carbon granules=1:1～3:1 in the middle iron carbon electrolysis cells of above-mentioned steps (3), carries out electrolytic reaction under acidic conditions, and the pH value of solution is controlled in 2～4 scopes.
Microorganism described in the above-mentioned steps (4) is whiterot fungi (production of HuaTe Science Sichuan Genie et Environnement).
Embodiment 1:
Waste emulsified mixture from certain steel pipe source mill, contain a large amount of iron filings, tensio-active agent in this waste liquid, and 1.5% oily substance, its COD value is 80000～100000mg/L, adopt method and apparatus of the present invention that this waste emulsified mixture is handled, add emulsion splitter CaCl
2And Al
2(SO
4)
3Consumption be respectively 4kg/m
3And 5kg/m
3Temperature is controlled at 70～80 ℃, stir 2h, 15h is left standstill in the breakdown of emulsion sedimentation, treatment capacity is 10t, and after sewage works was disposed, the COD value was that 40～100mg/L, petroleum content are 1～5mg/L in the effluent quality, reach primary standard among " national sewage comprehensive emission standard " GB8978-1996 fully, the waste oil of collecting in the disposal is used to produce patented product---barrier cream after making with extra care through regenerating.
Embodiment 2:
From the waste emulsified mixture of certain mechanical workout factory, contain 5% waste oil, tensio-active agent and water in this waste liquid, its COD value is 40000～80000mg/L, adopts method and apparatus of the present invention that this waste emulsified mixture is handled, and adds emulsion splitter CaCl
2And Al
2(SO
4)
3Consumption be respectively 3kg/m
3And 4kg/m
3Temperature is controlled at 70～80 ℃, stir 2h, 15h is left standstill in the breakdown of emulsion sedimentation, treatment capacity is 10t, and after sewage works was disposed, the COD value was that 40～100mg/L, petroleum content are 1～5mg/L in the effluent quality, reach primary standard among " national sewage comprehensive emission standard " GB8978-1996 fully, the waste oil of collecting in the disposal is used to produce patented product---barrier cream after making with extra care through regenerating.
Claims (4)
1. the treatment process of a waste emulsified mixture is characterized in that comprising following processing step:
(1) pre-treatment:
Place the pond, ground to filter solid shape impurity the waste emulsified mixture of collecting, the waste emulsified mixture of removing behind the solid shape impurity is pumped into the pre-treatment jar, add CaCl
2And Al
2(SO
4)
3, being heated to 55 ℃～80 ℃, breakdown of emulsion under agitation stirs standing sedimentation 10～15h behind 1～2h, separates, and reclaims oil phase;
(2) mechanical air flotation:
Waste liquid behind the Separation and Recovery oil phase changes with lift pump expects that carrying out air supporting to the mechanical air flotation system handles, pneumatically supported volume pressure is 0.2～0.5MPa, the volume ratio of molten gas and waste liquid is 1:20～30, reclaims oleaginous materials and further utilizes, and the waste water behind the separation oleaginous materials enters equalizing tank;
(3) iron carbon electrolysis:
The waste water of equalizing tank enters iron carbon electrolysis cells, pH value to 2～4 of regulator solution, electrolysis 30～50min under the normal temperature;
(4) secondary wastewater treatment:
Iron carbon electrolysis water outlet, pumps into the secondary Waste Water Treatment after compiling with trade effluent and handles in sewage-collecting well by pipe influx:
With lift pump the waste water in the sewage-collecting well is pumped in the distributing reservoir, adds water glass and flocculate, add water glass quality be 0.3～0.7% of waste water;
Waste water behind the sediment separate out enters the inclined plate grease pond and further separates oil slick, waste water behind the separation oil slick enters the microbially decontaminate system, organism in the waste water is degraded by microorganisms, after the settling bowl sedimentation, enter the sand filtration system, flow into industrial impounding reservoir behind the stone sand of water after the degraded in the sand filtration system, the activated carbon filtration recycling, and the microorganism of settling bowl lower floor returns and is used for purification system and recycles.
2. the treatment process of waste emulsified mixture according to claim 1 is characterized in that: in the treatment process of described waste emulsified mixture, and CaCl in the step (1)
2And Al
2(SO
4)
3Consumption be respectively 0.1～0.6% and 0.2～0.5% of waste emulsified mixture weight.
3. the treatment process of waste emulsified mixture according to claim 1 is characterized in that: in the treatment process of described waste emulsified mixture, in the step (3) in the iron carbon electrolysis cells mass ratio of iron filings, carbon granules be iron filings: carbon granules=1:1～3:1.
4. the treatment process of waste emulsified mixture according to claim 1, it is characterized in that: in the treatment process of described waste emulsified mixture, microorganism is a whiterot fungi described in the above-mentioned steps (4).
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| CN113121030B (en) * | 2019-12-30 | 2023-06-02 | 山东东顺环保科技有限公司 | Oily wastewater treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19532476A1 (en) * | 1995-09-02 | 1997-03-06 | Winfried Prof Dr Schmidt | Oil-contg. waste water treatment, esp. for separating oil-in-water emulsions |
| CN1238282C (en) * | 2003-12-31 | 2006-01-25 | 马晓鸥 | Treatment technology of emulsion contained spent water |
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