CN101723546A - Biological treating and filtering system for wastewater and the method of recycling the wastewater - Google Patents
Biological treating and filtering system for wastewater and the method of recycling the wastewater Download PDFInfo
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- CN101723546A CN101723546A CN200910180901A CN200910180901A CN101723546A CN 101723546 A CN101723546 A CN 101723546A CN 200910180901 A CN200910180901 A CN 200910180901A CN 200910180901 A CN200910180901 A CN 200910180901A CN 101723546 A CN101723546 A CN 101723546A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2101/00—Types of filters having loose filtering material
- B01D2101/02—Carbon filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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Abstract
The device comprises a screening groove for introducing the waste water generated by a waste water treatment plane and filtering the waste water; an aeration tank for nitrifying the waste water filtered by the screening froove; a MBR groove for removing the organic material and ammoniacal nitrogen in the nitrified waste water; an arbitrary denitrification groove for denitrifying the treated waste water from the MBR groove by arbitrary Thiobacillus; a sensor for measuring the C/N ratio of the treated waste water from the arbitrary denitrification groove; a UF filter groove with an ultrafiltration membrane and a porous pressure-resistance support tube with 200-200,000 dalton pores for removing the residual heavy metal and difficultly-decomposed compound in the treated water from the arbitrary denitrification groove; a R/O filter groove for removing the residual heavy metal and difficultly-decomposed compound in the treated water from the UF filter groove; an active carbon filter groove arranged between the UF filter groove and the R/O filter groove for removing the suspended material, heavy metal, difficulty-decomposed organic compound, offensive odor or the like in the treated water. If only the C/N ratio measured by the sensor is below 5, the water can be directly returned to the aeration tank from the arbitrary denitrification groove.
Description
[technical field]
The present invention is the system that effectively handles from effusive waste water such as factory, herding farmers', families.More particularly, the present invention is the technology of relevant waste water advanced processes with biological processes and filtration unit and waste water reuse method.
Invention is by biological processes and the parallel operation of physical filtering method, in the biological processes system, remove materials such as the high organic substance of Biodegradable, nitrogen, and the hardly-degradable substance that can't carry out biological processes is by utilizing the physical filtering system, waste water being carried out advanced processes.Therefore, the present invention and the technical field of preventing environmental pollution, especially closely related with the technical field of improving condition of water quality with the prevention water pollution.In addition, because the present invention also is associated with the postprocessing working procedures that water that waste water is released is recycled, also has dependency with the technology in resource reutilization field.
[background technology]
Studying at present the apparatus and method that relevant factory, herding farmers', family etc. locate effusive wastewater treatment widely.If observe original most of treatment process, it is commonplace that principal focal point is placed on the biological processes method of removing on the organism, but attempting the physics method parallel with separatory membrane widely recently.
Biological processes is mainly to utilize the biological chemistry metabolism of microorganism, and organism in the waste water or suspended matter are handled.For example, on Republic of Korea's publication communique 2003-84119 number, putting down in writing the treatment process of the nitrated microorganism that the anaerobies that passes through mud or aerobic digestion liquid cultivates.
Yet above-mentioned biological processes method has problems economically because floor space is big, moreover, because relatively more fragile on the water quality of introducing water and water yield load change link, some difficulty in the maintenance management, and antihygienic phenomenon such as stench can appear taking place on the sludge treatment.
In addition, the physical chemistry processing is to utilize physical phenomenon or chemical reaction, so methods such as utilization PH adjusting, filtration, oxidation, reduction, adsorbed ion exchanges.This type of physical chemistry processing can move off and on, thus in the maintenance management than being easier to.Yet, compare with the biological processes method, have the lower shortcomings of clearance such as organism, bacterium, micropartical.
The treatment process of utilizing separatory membrane according to the size of removing particle, is utilized filtering membranes such as secondary filter film, ultra-filtration membrane, reverse osmosis membrane as the method for just optionally extracting the water in the waste water.Secondary filter is that separation solute size is the membrane sepn operation of 0.1～10 μ m left and right sides solute, about 0.01～10 μ m of film as the aperture that use this moment.Above-mentioned secondary filter phenomenon can be enumerated the calm phenomenon of the lip-deep colloidalmaterial of film, and this is the phenomenon that reduces the secondary filter effect because colloidalmaterial stops up film surface pore relatively, should periodically change shortcomings such as film or repair membrane so have.
Ultrafiltration is meant that molecular size is 10～1000A Macromolecule, but the membrane sepn operation of separable colloidal particle.Membrane sepn almost is subjected to the domination of solute and pore size, according to spatial obstacle (steric hindrance) and the solute in the pore and the embodiment of the friction resistance between the porous wall separating effect of minute aperture ingress.
The aperture of reverse osmosis membrane is about about 10A, owing to almost do not have pore, can be called non-porous film usually, and it is by finishing the processing that material passes between the micelle of organic polymer formation micelle at interval.In the reverse osmosis method, because organic macromolecule dielectric coefficient is low, fused salt is difficult for being adsorbed on this film, moreover, solvent water passes according to the permeable pressure head ratio in high pressure, and is not to pass according to the working pressure difference, because water is compared with fused salt, pass easily comparatively speaking, so will improve separating effect.In addition, reverse osmosis is not the lock out operation that carries out according to molecular size, so the calm phenomenon of the same organism of secondary filter or ultrafiltration is less, therefore, has the long advantage in work-ing life of film.
Yet the existing treatment unit that utilizes reverse osmosis membrane, its equipment are very complicated, and the initial investment cost consumption is many, and the treatment effect of bacterium is reduced.
In filter type, if use a kind of mode to carry out wastewater treatment, when the filtering membrane pore opening hour, processing efficiency such as suspended matter and colibacillus will improve, but owing to stop up easily, consecutive periods and replacement cycle will reduce, so its maintenance management is difficult; When the filtering membrane pore is big,,, preferably handle by the parallel filtering mode of pre-treatment and subsequent disposal notion owing to be difficult to remove fine suspended matter etc. though maintenance management is easier to.
[summary of the invention]
Therefore, the present invention will have the problem conduct that exists in wastewater treatment equipment and the method now and mainly deal with problems, and for this reason, the present invention aims to provide with better simply equipment, carries out the system of waste water advanced processes.
In addition, the present invention also aims to provide waste water that said system the handles water recycling method of releasing.
In order to address the above problem and realize above-mentioned purpose, the present invention includes following structure:
The waste water that introduction produces from the waste water treatment plant also carries out filtering screening groove;
To carry out nitrated aeration tank from the waste water that above-mentioned screening groove is filtered;
The MBR groove of the removal organic substance in the itrated waste water and ammonium-nitrogen on above-mentioned aeration tank;
To carry out the arbitrariness denitrifying tank of denitrogenation processing from any thiobacillus of the effusive treating water utilization of above-mentioned MBR groove;
To carry out measured sensor from the C/N ratio that above-mentioned any denitrifying tank flows out treating water;
In order to remove remaining heavy metal and the difficult decomposed substance that is included in the effusive treating water of above-mentioned arbitrariness denitrifying tank, and form, and be provided with the UF filter vat of ultra-filtration membrane by the porous matter resistance to pressure supporting tube that is provided with the big aperture of 200～200,000 dalton;
The final removal is included in above-mentioned UF filter vat and flows out the remaining heavy metal in the water and the reverse osmosis filter vat (or claiming R/O filter vat) of difficult decomposed substance;
Be located between above-mentioned UF filter vat and the reverse osmosis filter vat, and remove the activated carbon filtration groove be included in the suspended matter that flows out in the water, heavy metal, difficult decomposing organic matter matter, stench etc.
In addition, the present invention includes following steps:
The waste water that will produce from the waste water treatment plant is introduced the stage of screening groove;
In above-mentioned screening groove, the filtration treatment water stage first time;
The treating water that screens the above-mentioned first time is introduced aeration tank and carry out the nitrated stage;
Introduce the MBR groove from the effusive treating water of above-mentioned aeration tank, and remove the stage of organic substance and ammonium-nitrogen;
To introduce the arbitrariness denitrifying tank from the effusive treating water of above-mentioned MBR groove, and utilize any thiobacillus to carry out the stage of denitrogenation processing;
Utilize transmitter to flow out the C/N for the treatment of water than the stage of measuring from above-mentioned any denitrifying tank;
To introduce extremely from the effusive treating water of above-mentioned arbitrariness denitrifying tank and form, and be provided with the UF filter vat of ultra-filtration membrane, the stage of removing remaining heavy metal and difficult decomposed substance by the porous matter resistance to pressure supporting tube that is provided with 200～200, the 000 big aperture of dalton;
To introduce the activated carbon filtration groove from the effusive treating water of above-mentioned UF filter vat, and remove suspended matter, heavy metal, difficult decomposing organic matter matter, malodorous stage;
Introduce reverse osmosis filter vat, the stage of finally removing remaining heavy metal and difficult decomposed substance from the effusive treating water of above-mentioned activated carbon filtration groove.
In addition, as long as the C/N ratio of measuring in the sensor is below 5, above-mentioned any denitrifying tank will directly be returned to aeration tank in inside.
Therefore, as long as utilize wastewater treatment equipment of the present invention, need not the injection of external carbon source, just can reach denitrification effect, also can obtain almost not have the high-quality treating water of suspended matter, and in biological processes, fail the difficult decomposed substance handled well etc. and can improve the standard of releasing and utilize the unusual removal efficient of water water quality again by R/O filter vat (or claiming reverse osmosis filter vat) and A/C filter vat (or title activated carbon filtration groove).
In addition, when the present invention is used for the subsequent disposal facility of present waste water disposal facility,, recycle the water device so can be used as owing to can remove the micropollution material that still has been untreated.
[description of drawings]
Fig. 1 is a Waste Water Treatment summary synoptic diagram of the present invention.
[embodiment]
Below by drawings and Examples, describe content of the present invention in detail.
Fig. 1 is a Waste Water Treatment summary synoptic diagram of the present invention.As shown in the figure, the present invention is made up of screening groove, aeration tank, MBR groove, UF filter vat, activated carbon filtration groove and reverse osmosis filter vat (or claiming the R/O filter vat).
Waste water reuse water treatment operation structure of the present invention is as follows: organic substance and the materials such as nitrogen, phosphorus of staying the waste water treatment plant at first are introduced into the screening groove, and most of hotchpotch and suspended matter will be carried out filtration.After this, in aeration tank and MBR groove, carry out the biological processes operation.
Be described in detail as follows: in aeration tank, will carry out nitratedly from the waste water that screens of screening groove, than low, nitrogen becomes the nitre nitrogen form through the treating water C/N of above-mentioned nitrifying process.Afterwards, in the MBR groove, utilize removal of microorganisms in above-mentioned aeration tank, to be carried out organic substance and ammonium-nitrogen in the nitrated waste water.
Effusive treating water is being carried out denitrogenation processing in the denitrifying tank arbitrarily from above-mentioned MBR groove, and utilize any thiobacillus to carry out denitrogenation processing this moment.As the case may be, if utilize heterotrophism and autotrophy simultaneously feasible any thiobacillus carry out denitrogenation processing, just almost 100% remove organic substance and nitrogen.In this process, prior art is because C/N than low, utilizes external carbon source such as methyl alcohol, but the present invention with the sulphur in the water and a small amount of organic substance as carbon source, advantage such as denitrogenate so have save energy and solution.
Usually, biology heterotroph denitrification reaction utilizes organic carbon source as electron donor, so in order effectively to remove nitrogen by the heterotroph denitrogenation processing, the waste water planted agent is contained the organism of sufficient quantity.Yet the characteristics of domestic waste water are that nitrogen concentration is higher relatively than organic concentration, so in order to handle nitrogen, by external carbon source such as injection methyl alcohol, carry out the heterotroph denitrogenation processing.
One of the shortcoming alkali of sulphur denitrogenation operation that utilizes thiobacillus is also in order to improve its consumption, and by carrying out autotrophy/heterotroph denitrogenation processing simultaneously, the present invention has utilized the aspect that helps nitric efficiency and economical efficiency.In order to remove nitrogen, when the nitrogen concentration in the waste water is higher than organic concentration, once utilized the high organism of price (methyl alcohol etc.) to remove nitrogen, but in contrast, cheap sulphur and a small amount of organism after nitrated carried out in utilization of the present invention, and utilize autotrophy and heterotroph to carry out denitrogenation processing simultaneously, remove nitrogen by back denitrogenation operation, so this operation is to be applicable to that C/N is than low and by the denitrogenation operation of nitration waste water.
The utilization of the present invention sulphur particle more cheap than external carbon source carries out denitrogenation processing, and drop into a small amount of external carbon source and carry out denitrification of autotrophic organism when handling, the supply of carbonic acid gas and guide heterotroph and autotrophic organism carries out denitrogenation processing simultaneously when ruined basicity and autotrophic microorganism denitrogenation processing, the nitre nitrogen overload phenomenon that flows into when reducing autotrophic microorganism denitrogenation processing in the reactor thus, and improve denitrogenation speed.Nitrated different with heterotroph, the organism of input will can not be stayed and flow out in the water, and also can carry out autotrophy and heterotroph nitration treatment simultaneously with organic matters, therefore can reach almost and 100% remove denitrification effect.
Remove factory, herding farmers', family etc. by biological processes and ultra-filtration membrane and locate material such as residual BOD and TOC, SS in the effusive waste water.Show below by table 1:
| Classification | Former water | The MBR treating water | MBR clearance (%) |
| ??CODO 2??(mg/L) | ??42.5??(33.4-54.2) | ??23.3??(17.0-31.4) | ??44.8??(18.6-60.9)) |
| ??TOC??(mg/L) | ??17.8??(13.2-20.2) | ??11.4??(8.7-15.2) | ??36.1??(23.2-45.5) |
| ??BOD??(mg/L) | ??11??(3.0-21.0) | ??5.8??(2.0-17.0) | ??51.5??(0-88.9) |
| ??COD Mn??(mg/L) | ??18.8??(14.0-24.0) | ??14.4??(12.0-18.0) | ??27.5??(5.3-38.1) |
| ??T-N??(mg/L) | ??7.0??(4.5-9.6) | ??6.4??(4.1-8.5) | ??4.8??(0-11.5) |
| ??T-P??(mg/L) | ??0.7??(0.3-0.9) | ??0.5??(0.1-0.8) | ??34.6??(4.1-98.8) |
| Turbidity (NTU) | ??2.3??(1.6-3.7) | ??0.039??(0.027-0.06) | ??98.3??(97.2-99.0) |
Table 1: the various composition treatment effects of the inflow waste water of biological processes groove of the present invention
The thiobacillus of using in above-mentioned biological processes unit is autotrophic microorganism or autotrophic microorganism fully arbitrarily preferably.
At this moment, the complete autotrophic microorganism in the thiobacillus (Thiobacillus) is preferably selected the mixture more than a kind or 2 kinds in Thiobacillus ferrooxidans, Thiobacillus albertis, Thiobacillus prosperus and Thiobacillus thiooxidans.
In addition, any autotrophic microorganism in the thiobacillus is preferably selected mixture more than a kind or 2 kinds in Thiobacillusacidophilus and Thiobacillus cuprinus, but is not limited thereto.
By measuring the C/N ratio that flows out treating water from above-mentioned arbitrariness denitrifying tank, as long as below 5, just directly be returned to aeration tank in inside.This is in order more correctly and effectively to carry out denitrogenation processing.
In the ultrafiltration groove, will handle the difficult decomposing organic matter that still has been untreated by said process or heavy metal etc.Above-mentioned ultrafiltration groove is provided with by 200～200, the ultra-filtration membrane that the porous matter resistance to pressure supporting tube that the big hole-shaped of 000 dalton becomes is formed, and that its material can use is heat-resisting, acid resistance, macromolecular material-polyethersulfone that mechanical property is good.Wastewater treatment by above-mentioned ultrafiltration groove is that the porous matter resistance to pressure supporting tube that is covered with film toward the inboard injects mud with pressuring method, and is undertaken by the mode that the treating water that the supporting tube outside is passed is concentrated.
Above-mentioned ultra-filtration membrane is carried out and is held optionally obstructive action.Therefore, as long as use ultra-filtration membrane with above-mentioned big aperture, just can effectively remove and have 300～500, the organic substance of 000 dalton left and right sides molecular weight, heavy metal etc., and have a material than above-mentioned big slight molecular weight, just being used as is to be cleaned into the degree that satisfies substantially, so can freely drop into processing.
Ultrafiltration groove among the present invention is the filtering membrane that is provided with tube shape in water, by extracting mud in the resistance to pressure supporting tube, and pass treating water by the above-mentioned supporting tube outside, so most of hard-decomposed organic in the waste water or heavy metal etc. are removed by barrier film, can obtain the treating water of stabilizing water quality, have simple in structurely, be provided with, safeguard and keep in repair advantages such as easy.
By the activated carbon filtration groove, will remove through above-mentioned ultrafiltration operation and also still fail last heavy metal and the difficult decomposed substance removed.After the removal of activated carbon filtration groove, finally the organic components such as TOC that reverse osmosis membrane is made a very bad impression will be reduced to minimum.
As shown in table 2 below, when reducing difficult decomposing organic matter, water quality will reach the degree that can directly release by activated carbon filtration groove (or claiming the A/C filter vat).
Table 2. is by organism, the removal efficiency of heavy metals of A/C filter vat (A/C Filter)
As long as according to Waste Water Treatment of the present invention and method, with the prior biological treatment process or utilize the treatment process of film to compare, owing to utilize simple more and the low equipment of cost, and by biological processes and utilize UF, can remove residual BOD and materials such as TOC, SS in the waste water.In addition, remove the difficult decomposing organic matter still be untreated etc. by activated charcoal filter, it is minimum finally can be that the TOC composition is reduced to the organic components that reverse osmosis membrane is made a very bad impression, and can guarantee stable production water water quality and condensed water water quality.Produce water and be used for utilizing again water, and condensed water need not just can directly release through the otherwise processed operation.
The present invention is as need not to inject oxidation and solidify mode with chemicals, and do not need additionally to carry out PH by chemical sludge and medicine and regulate, so compare with existing chemical method, is more prone to carry out maintenance management, but and decrease cost.
Claims (4)
1. device with biological processes, filtered wastewater comprises following structure:
The waste water that introduction produces from the waste water treatment plant also carries out filtering screening groove;
To carry out nitrated aeration tank from the waste water that above-mentioned screening groove is filtered;
The MBR groove of the removal organic substance in the itrated waste water and ammonium-nitrogen on above-mentioned aeration tank;
To carry out the arbitrariness denitrifying tank of denitrogenation processing from any thiobacillus of the effusive treating water utilization of above-mentioned MBR groove;
To carry out measured sensor from the C/N ratio that above-mentioned any denitrifying tank flows out treating water;
In order to remove remaining heavy metal and the difficult decomposed substance that is included in the effusive treating water of above-mentioned arbitrariness denitrifying tank, and form, and be provided with the UF filter vat of ultra-filtration membrane by the porous matter resistance to pressure supporting tube that is provided with the big aperture of 200～200,000 dalton;
The final removal is included in above-mentioned UF filter vat and flows out the remaining heavy metal in the water and the reverse osmosis filter vat of difficult decomposed substance; And,
Be located between above-mentioned UF filter vat and the reverse osmosis filter vat, and remove the activated carbon filtration groove be included in the suspended matter that flows out in the water, heavy metal, difficult decomposing organic matter matter, stench etc.
2. device according to claim 1 further comprises an equipment, makes: as long as the C/N ratio of measuring in the sensor is below 5, above-mentioned arbitrariness denitrifying tank will directly be returned to aeration tank in inside.
3. a waste water reuse method of utilizing the described device of claim 1 comprises the steps:
The waste water that will produce from the waste water treatment plant is introduced the stage of screening groove;
In above-mentioned screening groove, the filtration treatment water stage first time;
The treating water that screens the above-mentioned first time is introduced aeration tank and carry out the nitrated stage;
Introduce the MBR groove from the effusive treating water of above-mentioned aeration tank, and remove the stage of organic substance and ammonium-nitrogen;
To introduce the arbitrariness denitrifying tank from the effusive treating water of above-mentioned MBR groove, and utilize any thiobacillus to carry out the stage of denitrogenation processing;
Utilize transmitter to flow out the C/N for the treatment of water than the stage of measuring from above-mentioned any denitrifying tank;
To introduce extremely from the effusive treating water of above-mentioned arbitrariness denitrifying tank and form, and be provided with the UF filter vat of ultra-filtration membrane, the stage of removing remaining heavy metal and difficult decomposed substance by the porous matter resistance to pressure supporting tube that is provided with 200～200, the 000 big aperture of dalton;
To introduce the activated carbon filtration groove from the effusive treating water of above-mentioned UF filter vat, and remove suspended matter, heavy metal, difficult decomposing organic matter matter, malodorous stage; And,
Introduce reverse osmosis filter vat, the stage of finally removing remaining heavy metal and difficult decomposed substance from the effusive treating water of above-mentioned activated carbon filtration groove.
4. method according to claim 3 further comprises step: as long as the C/N ratio of measuring in the sensor is below 5, above-mentioned arbitrariness denitrifying tank will directly be returned to aeration tank in inside.
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| KR10-2008-0105612 | 2008-10-28 | ||
| KR1020080105612A KR100882802B1 (en) | 2008-10-28 | 2008-10-28 | Biological treating and filtering system for wastewater and the method of recycling the wastewater |
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| KR101336875B1 (en) | 2012-01-06 | 2013-12-04 | (주)한라산업개발 | Advanced treatment system of wastewater |
| KR101269261B1 (en) | 2012-12-28 | 2013-05-29 | 주식회사 한화건설 | A method for advanced wastewater treatment combined with chemical coagulation processes and the system |
| KR101743642B1 (en) * | 2015-12-10 | 2017-06-05 | 엘지히타치워터솔루션 주식회사 | Water treating apparatus including bubble generator |
| KR101795698B1 (en) | 2017-07-11 | 2017-12-01 | 남궁엽 | Waste water Treatment Method and apparatus by Centrifuges |
| CN107364999A (en) * | 2017-08-09 | 2017-11-21 | 过蕊 | A kind of organic waste-water treating apparatus |
| CN110204140A (en) * | 2019-05-06 | 2019-09-06 | 苏州久沛环保科技有限公司 | A kind of hospital sewage treatment device and its sewage water treatment method |
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| JPH07232192A (en) * | 1994-02-23 | 1995-09-05 | Kubota Corp | Treatment of sewage |
| JP3382766B2 (en) * | 1995-12-27 | 2003-03-04 | アタカ工業株式会社 | Method and apparatus for treating human wastewater |
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Application publication date: 20100609 |