CN1196336A - Method for disposing printing and dyeing waste water and filter installation used - Google Patents
Method for disposing printing and dyeing waste water and filter installation used Download PDFInfo
- Publication number
- CN1196336A CN1196336A CN 97104496 CN97104496A CN1196336A CN 1196336 A CN1196336 A CN 1196336A CN 97104496 CN97104496 CN 97104496 CN 97104496 A CN97104496 A CN 97104496A CN 1196336 A CN1196336 A CN 1196336A
- Authority
- CN
- China
- Prior art keywords
- filter
- wastewater
- pipe
- modified
- tank body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
A process for treating waste dyeing and printing water includes such technological steps as introducing the waste water into tank in which there is filter-interceptor with improved filter tube to capture granules and suspended substance of 5 microns or more and form cake having filter action, addition of iron polysulfate, oxidant and flocculating aid for catalytic oxidation and flocculation, and filtering through millipore filter, and features less investment and low cost.
Description
The present invention belongs to a treatment method of industrial waste water, more specifically a treatment method of printing and dyeing waste water and its special-purpose filtering equipment.
Industrial wastewater accounts for a large proportion of environmental pollution, so that the treatment of industrial wastewater is a very important problem in the task of environmental protection. Especially, industrialized construction is carried out on vast cities and countrysides in China, and governments and enterprises need to be considered seriously. There are three types of processes for treating industrial wastewater: namely biochemical method, physicochemical method andbiochemical and physicochemical combined methods. In recent years, with the development of petroleum industry, new products of synthetic fibers are emerging, and the types of dyes used are increased correspondingly, such as vat dyes, naftidrofury dyes, disperse dyes, cationic dyes, reactive dyes, vat dyes, sulfur dyes, and the like. And various auxiliary agents, sizing agents, acid-base surfactants and inorganic salts which all cause chemical oxygen demand COD in the printing and dyeing wastewatercrBiological oxygen demand BOD5Increase in chromaticity and heavy metal ions. When BOD is in the printing and dyeing wastewater5/CODcrWhen the amount is 0.2-0.3, the treatment is difficult by biochemical methods, and particularly, some dyes (such as reactive dyes) have inhibiting and poisoning effects on the zoogloea subjected to biochemical treatment. In order to effectively treat the printing and dyeing wastewater, high-efficiency physicochemical treatment methods are explored in all countries in the world at present.
Japanese patent laid-open No. 51-80348 discloses a method for treating printing and dyeing wastewater by a coagulation filtration method, which comprises introducing carbon dioxide into the wastewater to adjust the pH value of the solution to 5.5-7.2, adding aluminum sulfate as a coagulant to maintain ppm level, and then separating and filtering the precipitate.
Another method described in Japanese patent laid-open No. 53-94297 is: iron (III) ions and reactive dyes form a phthalocyanine iron complex, the iron complex is condensed under the action of a catalyst, and when the pH value is 3, the oxidation effect of the iron complex can remove harmful substances in the printing and dyeing wastewater. The method needs treatment equipment such as a rinsing tank, a dephosphorization tank, a regeneration tank, a precipitation static tank and the like, the investment is large, the water content of the treated waste residue is high, and secondary pollution can be caused by improper treatment. In particular, the method can only be applied to specific conditions of wastewater containing reactive dye components, and the application range is limited.
The patent publication of CN91104222.9 discloses a method and equipment for treating printing and dyeing wastewater in three units, namely, the idea of three steps of coarse filtration, catalytic oxidation flocculation and microporous filtration for intercepting filter cakes, but some of the technologies are not mature, and the quantitative range in the technologies is not clear enough, so the practical operation is inconvenient.
The invention aims to overcome the defects of the prior art, further improve the method for treating the printing and dyeing wastewater by three units, ensure that the method has wider application range, simple and feasible process, less investment and better effect, and further improve the technical problems of the used filtering equipment.
The invention achieves the purpose through the following technical scheme.
The treatment method of the printing and dyeing wastewater comprises three treatment units of coarse filtration, catalytic oxidation flocculation and microporous filtration, wherein the first treatment unit is used for leading the wastewater to enter a modified filter pipe in a filter interceptor for coarse filtration, so that particles with the particle size of more than 5 microns in the wastewater are intercepted and attached to the pipe wall of the modified filter pipe to gradually form a filter cake, and the removal rate of suspended matters in the wastewater can reach 30-50%. The second treatment unit is to carry out catalytic oxidation flocculation on the filtrate filtered by the filter interceptor in a feed liquid pool, namely, 30-50ppm of flocculating agent polymeric ferric sulfate is sequentially added into the filtrate, then 5-10ppm of strong oxidant hydrogen peroxide or sodium hypochlorite is added to carry out catalytic oxidation to destroy chromophoric groups in dye molecules, simultaneously iron ions are combined with OH<-> in water to form iron (III) hydroxide floccules, and then 0.3-0.6ppm of coagulant aid polyacrylamide or 5-15ppm of lime milk is added to enhance the flocculation precipitation effect of suspended matters in the filtrate, so that the color in the wastewater is lightened or clarified. And the third treatment unit is to pump the filtrate after the flocculation and precipitation of the second treatment unit into a microporous filter, so that the wastewater is filtered by a modified microporous filter pipe with smaller pores (1-5 microns), and fine suspended matters in the wastewater are removed to obtain clear and recyclable effluent or wastewater reaching the discharge standard.
The polyferric sulfate used in the second treatment unit, namely the catalytic oxidation and flocculation steps, isa high-efficiency inorganic polymeric flocculant, generates a multi-core complex in the hydrolysis process, promotes the aggregation of colloidal particles in the filtrate through the actions of adsorption, bridging, cross-linking and the like, and simultaneously neutralizes the charges on the surfaces of the colloidal particles and suspended matters, reduces the zeta potential of micelles, destroys the stability of the micelles, and thus forms flocculent aggregate precipitates.
The hydrolysis and polymerization sedimentation reaction of the polymeric ferric sulfate are as follows:
as can be seen from the above reaction, the polymeric ferric sulfate provides a large amount of polymeric ferric complex ion [ Fe (H) with high cohesion in the aqueous solution2O]3+The flocculent ferric hydroxide has the functions of coagulation and purification and removing COD in the wastewatercrBOD5The chroma, suspended matters and heavy metal ions play a strong role. In addition, Fe in polymeric ferric sulfate3+And Fe2+Has catalytic effect on hydrogen peroxide and can generate OH with strong oxidizing power-The free radicals are used for oxidizing and decomposing organic matters and other harmful substances in the printing and dyeing wastewater by utilizing the oxidizing capability of the free radicals to destroy chromophoric groups in dye molecules. Such as:
so as to reduce the chemical oxygen consumption in the wastewater and remove the chroma in the wastewater. The coagulant aid is added to accelerate flocculation, increase the density of the condensate, accelerate precipitation and improve the filtering and clarifying effect.
The filtering equipment used in the invention comprises a filtering interceptor of a first unit and a microporous filter of a third unit, wherein the two devices have basically the same structure and respectively comprise a tank body, a sludge discharge device, a water inlet pipe, a water outlet pipe, a filtering device and the like, wherein the tank body is sealed, the upper part of the tank body is a top cover, the lower part of the tank body is provided with the sludge discharge device which can be opened and closed, the water inlet pipe and the water outlet pipe are respectively communicated with the middle part and the top cover of the tank body, the filtering device comprises a mounting disc and a modified filtering pipe, through holes are formed in the mounting disc, the through holes are fixedly connected with the upper part of the modified filtering pipe one by one, the filtering device is positioned in the tank body, and the periphery. The filter trap and the microporous filter differ only in the porosity of the modified filter tube.
The filter interceptor used in the first treatment unit was equipped with modified filter tubes having a wall thickness of 8-10 mm and pores of 5-10 μm. Along with the filtering process, a filter cake is gradually formed on the pipe wall of the filtering pipe, so that the interception capability is greatly improved, and suspended particles with the particle size of more than 5 microns in the wastewater can be intercepted. The filtration resistance is gradually increased along with the thickening of the filter cake, when the requirement of the filtration water yield can not be met, the filtration is stopped, compressed air is used for back blowing and stripping, the filter cake is stripped off, and then the filter cake is washed by purified water. After these operations are completed, the filter trap is regenerated for reuse. The washed waste slag is removed from the sludge discharge port.
The microporous filter used in the third treatment unit is provided with a modified filter pipe with the wall thickness of 8-10 mm and the pore size of 1-5 microns, and is used for filtering the filtrate flocculated by the second unit.
The modified filter tube can be made into different shapes according to different purposes, and the manufacturing process is as follows. The modified filter tube is prepared by respectively using polyvinyl chloride, polyethylene, polypropylene or ABC engineering plastics as master batches, adding a proper amount (5% by weight) of active materials (active diatomite, active carbon, active defluorination filter material or quick lime) to mix and fill in a mould for sintering, wherein the sintering temperature is 300-350 ℃. The modified filter pipes with different pores can be obtained by controlling the charging quantity and the mechanical vibration times in the die. The additive can be one or more of the active materials. The most common and economical parent material is polyvinyl chloride, activated diatomaceous earth is used as an additive for turbidity removal, activated carbon is used for decolorization, defluorinated plastic is used for defluorination, and quicklime is used for heavy metal removal. The sintered microporous filter tube has high strength (pressure resistance of 0.7MP3), strong adsorption effect and high treatment effect.
The mud discharging device arranged at the lower part of the filter capturer and the microporous filter consists of a bottom cover, a locking cylinder and an uncovering cylinder. The bottom cover is positioned at the opening at the bottom of the tank body, one side of the bottom cover is provided with a rotating shaft, and the bottom cover can rotate downwards around the rotating shaft to be opened; the locking cylinder is fixed on one side of the lower part of the tank body, and the end part of a piston rod of the locking cylinder is provided with a locking hook; the cylinder for opening the cover is fixed on the other side of the lower part of the tank body, and a piston rod of the cylinder is interlocked with the bottom cover through a crank connecting rod, so that the pneumatic automatic mud discharging device can be manufactured.
The filter interceptor and the microporous filter in the first and third treatment units can be used singly or in series or in parallel.
The invention has the characteristics of small occupied area, low investment and good treatment effect. The investment cost is only one third of that of the air floatation method. The pneumatic automatic mud discharging device adopted by the equipment is convenient to operate and can reduce the labor intensity. The modified filter tube adopted by the filter equipment has proper porosity, and can form filter cakes to intercept suspended matters, colloidal substances and particulate matters in filtrate. And simultaneously has an adsorption function for decoloring. The filter cake formed outside the modified filter pipe has an additional filtering function, and the filtering efficiency is improved. The back flushing regeneration of the device is very simple, the water content of the mud cake after back flushing is about 80 percent, sludge deep-condensation and dehydration equipment can be saved, and the treatment cost is greatly reduced.
Through determination, the pH value of the treated water is about 7, the chroma of the printing and dyeing wastewater is removed by 90-95%, the removal rate of suspended matters is 95-98%, and the removal rate of chemical oxygen consumption is 70-83%.
The water quality treated by the method is clear and transparent, and can be reused for primary and secondary rinsing process water, flushing workshop floor and greening water. Thus saving a large amount of water resources and having considerable economic and social benefits.
Description of the drawings:
FIG. 1 is a schematic diagram of the filter trap and microporous filter configurations in the examples.
Fig. 2 is a schematic view of the sludge discharge device in an open state.
Wherein: 1-tank, 11-top cover, 12-blow-down pipe, 13-exhaust pipe, 14-pressure gauge, 15-pressure gauge, 16-tank supporting seat, 17-water inlet baffle, 111-back blowing air inlet pipe and 121-positive blowing air inlet pipe;
2-mud discharging device, 21-bottom cover, 22-uncovering cylinder, 23-locking cylinder, 211-rotating shaft, 221-uncovering cylinder piston rod, 222-crank connecting rod, 231-locking cylinder piston rod and 232-locking hook;
3-water inlet pipe
4-water outlet pipe, 41-back blowing air inlet pipe;
5-a filtering device, 51-a mounting disc, 52-a modified filtering pipe, 52-an upper gasket, 54-a lower gasket and 55-a locking nut;
6-operating the platform.
The inlet tube sets up a water baffle with jar body junction in this embodiment, prevents that rivers from directly impacting the modification filter tube, and the modification filter tube adopts lock nut with the mounting disc to be connected to the dismouting. The modified filter tube has an outer diameter of 85 mm, an inner diameter of 65 mm and a length of 1000 mm, and 31 filter tubes are uniformly distributed on the mounting disc. For a modified filter tube of the filter interceptor, 1.4 kg of polyvinyl chloride is charged, vibrated for 30 times and the pores are 5-10 microns; the modified filter tube of the microporous filter is charged with 1.6 kg, vibrated for 34 times, and the pore size can be controlled to be 1-5 microns.
The operation process is as follows:
firstly, a valve on the water inlet pipe 3 is opened in the filtering operation, so that the treated water enters the tank body 1 along the water inlet pipe 3 and then is filtered inwards through the outer wall of the modified filtering pipe. Suspended matters and floccules in the water are intercepted on the outer wall of the modified filter pipe, and the filtered water is discharged from the water outlet pipe 4 upwards along the inner wall of the modified filter pipe.
Second, removing filter residue and regenerating and washing operationWhen the quality of the outlet water exceeds the standard or the resistance of the modified filter pipe reaches 0.3MPa, the filter needs to discharge slag and regenerate, and a valve A on the water inlet pipe 3 is closed0The valve A5 on the vent pipe 12 is opened to allow the remaining water in the tank to flow back to the reaction tank. Open the emptying valve A4Closing the valve A5Opening the valve A on the forward blowing intake pipe 1216Introducing pressure air into the tank body to blow off water in the filter cake. Then close valve A6And A1Opening valve A4And opens the valve Aon the back-blowing air inlet pipe 412And (3) back blowing air inlet, wherein compressed air penetrates outwards from the inner wall of the modified filter pipe, so that filter cakes on the outer wall of the filter pipe are blown off. When the pressure gauge 14 and the pressure gauge 15 read substantially the same, the filter cake was considered to have completely broken off. And a small amount of clear water is used for backwashing, so that the regeneration can be more thorough.
And thirdly, when the filter cake on the pipe wall falls to the bottom of the tank body in the operation of opening the cover and discharging the sludge, the air pump is started to feed air into the locking cylinder 23, the piston rod 231 moves downwards to drive the locking hook 232 to move and separate from the bottom cover 21, meanwhile, the piston rod 221 in the opening cylinder also drives the crank connecting rod 222 to move, the bottom cover 21 rotates downwards by taking the rotating shaft 211 as the axial direction and falls, and filter residues are discharged. Then, the two cylinders are started to jointly complete the processes of closing the cover and locking.
Through determination, the water quality before and after the treatment by the invention has the following quality:
| pH | color intensity | Suspension (SS) (mg/l) | CODcr(mg/l) | |
| Inflow water | 9.5 | 260 | 300 | 379.2 |
| Discharging water | 7.1 | 10 | 6 | 111 |
| Removal rate | 96.2 | 98 | 70.7 |
The invention overcomes the defects of the prior art, has low cost, small occupied area, less investment, good effect and wider application range, can treat the printing and dyeing wastewater, can also correspondingly treat the wastewater in the industries of metallurgymanufacturing, instrument processing, electroplating, paper making and the like and high-concentration organic wastewater, and has extremely wide application prospect.
Although the present invention has been described with reference to the above embodiments, the present invention is not limited to the above embodiments. Various modifications that may occur to those skilled in the art upon reading the specification, which are intended to be within the scope of the invention, are to be considered as within the scope of the invention, provided they utilize the basic concept of the invention and be within the scope and range of equivalents of the claims.
Claims (9)
1. A method for treating printing and dyeing wastewater comprises three treatment units of coarse filtration, catalytic oxidation flocculation and microporous filtration, and is characterized in that a first treatment unit is used for enabling the wastewater to enter a modified filter pipe in a filter interceptor for coarse filtration, so that particles with the particle size of more than 5 microns in the wastewater are intercepted and attached to the pipe wall of the modified filter pipe to gradually form a filter cake; the second treatment unit is to carry out catalytic oxidation flocculation on the filtrate filtered by the filter interceptor in a feed liquid pool, namely 40ppm of flocculating agent polymeric ferric sulfate is sequentially added into the filtrate, 5-10ppm of strong oxidant hydrogen peroxide or sodium hypochlorite is added, and 0.5ppm of coagulant aid polyacrylamide or 10ppm of lime milk is added to enhance the flocculation precipitation effect of suspended matters in the filtrate; and the third treatment unit is to pump the filtrate after the flocculation and precipitation of the second treatment unit into a microporous filter, so that the wastewater is filtered by a modified microporous filter pipe with smaller pores (1-5 microns), and fine suspended matters in the wastewater are removed to obtain clear and recyclable effluent or wastewater reaching the discharge standard.
2. The method of treating printing and dyeing wastewater according to claim 1, characterized in that the strong oxidizing agent is preferably sodium hypochlorite.
3. A filter device for use in a method of treating printing and dyeing wastewater according to claim 1, characterized in that the filter device comprises a first unit of filter trap and a third unit of microporous filter, each of which is composed of five parts of a tank, a sludge discharge device, a water inlet pipe, a water outlet pipe and a filter device; the tank body is sealed, the upper part of the tank body is a top cover, the lower part of the tank body is provided with an openable sludge discharge device, and the water inlet pipe and the water outlet pipe are respectively communicated with the middle part of the tank body and the top cover; the filter equipment includes mounting disc and modification filter tube, division utensil through-hole on the mounting disc, through-hole department and modification filter tube top tube portion one-to-one fixed connection, and filter equipment is located jar internal portion, and the junction at the top cap and the middle part jar body is fixed to the periphery of mounting disc.
4. A filter device according to claim 3, wherein the wall thickness of the modified filter tube is 8-10 mm.
5. A filter device according to claim 3 or 4, characterised in that the modified filter tube in the filter trap has a pore size of 5-10 microns.
6. A filter device according to claim 3 or 4, wherein the modified filter tubes in the microporous filter have a pore size of 1-5 microns.
7. The filtering apparatus as claimed in claim 3 or 4, wherein the modified filtering pipe is made by sintering a master batch of one of polyvinyl chloride, polyethylene, polypropylene or ABS engineering plastics in a mold with an active material added thereto at a sintering temperature of 300 ℃ and 350 ℃ and controlling the amount of the filler and the number of mechanical vibrations to control the pore diameter of the pores.
8. The filtering equipment as claimed in claim 7, wherein the added active material is one or more of active diatomite, active carbon, defluorination filter material or quicklime.
9. The filter equipment according to claim 3, wherein the sludge discharge device is composed of a bottom cover, a locking cylinder and an uncovering cylinder, the bottom cover is positioned at the opening at the bottom of the tank body, a rotating shaft is arranged on one side of the bottom cover, and the cover can rotate downwards around the rotating shaft to be opened; the locking cylinder is fixed on one side of the lower part of the tank body, and the end part of a piston rod of the locking cylinder is provided with a locking hook; the cylinder for opening the cover is fixed on the other side of the lower part of the tank body, and a piston rod of the cylinder for opening the cover is interlocked with the bottom cover through a crank connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97104496 CN1196336A (en) | 1996-10-29 | 1997-06-23 | Method for disposing printing and dyeing waste water and filter installation used |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120426 | 1996-10-29 | ||
| CN96120426.5 | 1996-10-29 | ||
| CN 97104496 CN1196336A (en) | 1996-10-29 | 1997-06-23 | Method for disposing printing and dyeing waste water and filter installation used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1196336A true CN1196336A (en) | 1998-10-21 |
Family
ID=25744053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97104496 Pending CN1196336A (en) | 1996-10-29 | 1997-06-23 | Method for disposing printing and dyeing waste water and filter installation used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1196336A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436346C (en) * | 2006-11-16 | 2008-11-26 | 五邑大学 | Multiple phase catalytic oxidation-coagulation precipitation method for processing active dye printing waste water |
| CN102417251A (en) * | 2011-10-14 | 2012-04-18 | 韩小满 | Textile sewage treatment and recycling system |
| CN103833161A (en) * | 2014-03-03 | 2014-06-04 | 常州友邦净水材料有限公司 | Pretreatment method and application of glass fiber wastewater |
| CN105130062A (en) * | 2015-09-25 | 2015-12-09 | 浙江奇彩环境科技有限公司 | Anthraquinone wastewater treatment method |
| CN106517582A (en) * | 2016-11-25 | 2017-03-22 | 南宁市黑晶信息技术有限公司 | Method for treating printing and dyeing wastewater of pure wool textile fabrics |
| CN106914063A (en) * | 2017-04-18 | 2017-07-04 | 合肥通用机械研究院 | The oil removing system step by step and its deoiling method of a kind of oil-containing material |
| CN107935094A (en) * | 2017-11-22 | 2018-04-20 | 沈阳艾柏瑞环境科技有限公司 | Resin adsorption regenerates the treatment process device and method of high concentrated organic waste liquid |
| CN107970658A (en) * | 2017-12-04 | 2018-05-01 | 上海大张过滤设备有限公司 | Candle filter |
| CN108698867A (en) * | 2016-02-15 | 2018-10-23 | 威立雅水务技术支持公司 | Method for reducing sulfide from water and waste water |
| CN109843543A (en) * | 2016-10-13 | 2019-06-04 | 史太林格有限责任公司 | Device and method for filtering plastic fusant |
-
1997
- 1997-06-23 CN CN 97104496 patent/CN1196336A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436346C (en) * | 2006-11-16 | 2008-11-26 | 五邑大学 | Multiple phase catalytic oxidation-coagulation precipitation method for processing active dye printing waste water |
| CN102417251A (en) * | 2011-10-14 | 2012-04-18 | 韩小满 | Textile sewage treatment and recycling system |
| CN103833161A (en) * | 2014-03-03 | 2014-06-04 | 常州友邦净水材料有限公司 | Pretreatment method and application of glass fiber wastewater |
| CN105130062A (en) * | 2015-09-25 | 2015-12-09 | 浙江奇彩环境科技有限公司 | Anthraquinone wastewater treatment method |
| CN108698867A (en) * | 2016-02-15 | 2018-10-23 | 威立雅水务技术支持公司 | Method for reducing sulfide from water and waste water |
| CN108698867B (en) * | 2016-02-15 | 2021-11-23 | 威立雅水务技术支持公司 | Process for sulfide reduction from water and wastewater |
| US11008240B2 (en) | 2016-02-15 | 2021-05-18 | Veolia Water Solutions & Technologies Support | Process for reduction of sulfide from water and wastewater |
| CN109843543A (en) * | 2016-10-13 | 2019-06-04 | 史太林格有限责任公司 | Device and method for filtering plastic fusant |
| CN109843543B (en) * | 2016-10-13 | 2021-03-09 | 史太林格有限责任公司 | Device and method for filtering plastic melts |
| CN106517582A (en) * | 2016-11-25 | 2017-03-22 | 南宁市黑晶信息技术有限公司 | Method for treating printing and dyeing wastewater of pure wool textile fabrics |
| CN106914063A (en) * | 2017-04-18 | 2017-07-04 | 合肥通用机械研究院 | The oil removing system step by step and its deoiling method of a kind of oil-containing material |
| CN107935094A (en) * | 2017-11-22 | 2018-04-20 | 沈阳艾柏瑞环境科技有限公司 | Resin adsorption regenerates the treatment process device and method of high concentrated organic waste liquid |
| CN107935094B (en) * | 2017-11-22 | 2020-05-22 | 沈阳艾柏瑞环境科技有限公司 | Treatment process device and method for resin adsorption regeneration high-concentration organic waste liquid |
| CN107970658A (en) * | 2017-12-04 | 2018-05-01 | 上海大张过滤设备有限公司 | Candle filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3235492A (en) | Composition for and method of removing impurities from water | |
| CN101074141A (en) | Process for regenerating, recovering and reutilizing low-concentration organic waste water | |
| CN107601759A (en) | A kind of dyeing and printing sewage multi-stage combination processing system and handling process | |
| CN1196336A (en) | Method for disposing printing and dyeing waste water and filter installation used | |
| CN101045593A (en) | Zero discharge treatment method for coking wast water and its device | |
| CN203007063U (en) | Comprehensive wastewater treatment device of inorganic laboratory | |
| CN105152471A (en) | Combined treatment process for non-biodegradable organic wastewater | |
| WO2018032830A1 (en) | Regeneration system for residual water from treatment of contaminated bottom sludge from river or lake | |
| CN219156706U (en) | High-efficient denitrification facility in deep bed filtering pond | |
| CN210795975U (en) | Efficient treatment device for printing and dyeing wastewater | |
| CN1068089A (en) | The method of treatment of dyeing and printing and specific equipment | |
| CN104909518B (en) | Device and treatment method for treating and recycling car washing wastewater by using diatomite | |
| CN217677216U (en) | Automobile production wastewater treatment system | |
| CN102942271A (en) | Comprehensive treatment process of inorganic laboratory wastewater | |
| CN214360897U (en) | Deoiling device for coal mine water purification treatment process | |
| CN1184082A (en) | Sewage treatment technology and equipment using refined diatomite as treating agent | |
| CN211141755U (en) | Convenient integrated form waste water treatment and recycling system that sprays paint | |
| CN213388083U (en) | Industrial wastewater purification treatment device | |
| CN209906563U (en) | Processing system for processing antioxidant wastewater | |
| CN107585965A (en) | A kind of large scale industry sewage-treatment plant | |
| CN110746003A (en) | Convenient integrated paint spraying wastewater treatment and recycling system and method | |
| KR20020027089A (en) | Wastewater Reclamation Method for Water Reuse and Wastewater Reclamation Apparatus for Water Reuse | |
| CN110963603A (en) | Water supply plant sludge water recycling system for removing enhanced pollutants | |
| CN1680193A (en) | Apparatus and process for wastewater treatment of dyeing and finishing textile | |
| CN219709325U (en) | Nitrogen-phosphorus wastewater treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |