CN102190390A - Vanadium and titanium industrial wastewater treatment device - Google Patents
Vanadium and titanium industrial wastewater treatment device Download PDFInfo
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- CN102190390A CN102190390A CN2010101188077A CN201010118807A CN102190390A CN 102190390 A CN102190390 A CN 102190390A CN 2010101188077 A CN2010101188077 A CN 2010101188077A CN 201010118807 A CN201010118807 A CN 201010118807A CN 102190390 A CN102190390 A CN 102190390A
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Abstract
The invention relates to a hexavalent chromium- and ammonia nitrogen element-containing vanadium and titanium production wastewater treatment device, and provides a vanadium and titanium industrial wastewater treatment device, which can make hexavalent chromium, ammonia nitrogen, chemical oxygen demand (CODcr), pH, suspended matters, chroma, and biochemical oxygen demand (BOD) generated in the vanadium and titanium production wastewater meet standards and discharged. The device is provided with a grate, an adjusting tank, a first dosing box, a second dosing box, a third dosing box, a sedimentation tank, a vertical flow sedimentation tank, a first inclined tube sedimentation tank, a second inclined tube sedimentation tank, a first water pump, a second water pump, a third water pump, a fourth water pump, a fifth water pump, a sixth water pump, a recoil pump, a slurry pump, an intermediate water tank, an aeration tower, an air blower, a dosing water tank, a double filtration tower, a filter press, a screw pump, a sludge concentration tank, a sludge pump and the like. The wastewater containing overproof hexavalent chromium, ammonia nitrogen elements, CODcr, pH, suspended matters, chroma, and BOD in the vanadium and titanium production process is subjected to homogeneous adjustment, acid-alkali neutralization, solution sedimentation, biochemical reaction, aeration for ammonia removal, double filtration, sludge concentration, pressure filtration for dehydration and the like; and the treated sludge is transported outwards, and the treated wastewater meets standard to be discharged or recycled.
Description
Technical field
The present invention relates to the processing of a kind of trade effluent or sewage, particularly relate to a kind of vanadium titanium production wastewater treatment device that contains sexavalent chrome and ammonia nitrogen element.
Background technology
The waste water that in vanadium titanium production process, is produced, sexavalent chrome, ammonia nitrogen, CODcr, PH, suspended substance, colourity and BOD etc. must be through handling, water outlet after the processing must reach national comprehensive wastewater emission standard, remove CODcr, pH, suspended substance, colourity and BOD in the waste water, treated reaching outside the emission standard in implementing integrated artistic, the sexavalent chrome in the vanadium titanium trade effluent also must reach the relevant emission standard of country with ammonia-nitrogen content.
Summary of the invention
Contain sexavalent chrome, ammonia nitrogen and CODcr, PH, suspended substance, colourity and BOD in the waste water that the objective of the invention is to be produced and exceed standard and influence the problem of discharge of wastewater, a kind of vanadium titanium Industrial Wastewater Treatment device with the sexavalent chrome, ammonia nitrogen, CODcr, PH, suspended substance, colourity and the BOD qualified discharge that are produced in the vanadium titanium factory effluent is provided at existing vanadium titanium production process.
Technical scheme of the present invention is at containing the waste water that sexavalent chrome, ammonia nitrogen element and CODcr, PH, suspended substance, colourity and BOD exceed standard in the vanadium titanium production process, it is adopted methods such as homogeneous adjusting, acid-base neutralisation, solution precipitation, biochemical reaction, aeration deamination, extra quality filtration, mud concentrate, filter-press dehydration, make emission compliance.
The present invention is provided with grid, equalizing tank, the 1st dosing tank, the 2nd dosing tank, the 3rd dosing tank, settling tank, vertical sedimentation tank, the 1st tube settler, the 2nd tube settler, the 1st water pump, the 2nd water pump, the 3rd water pump, the 4th water pump, the 5th water pump, the 6th water pump, recoil pump, slush pump, intermediate pool, aeration tower, gas blower, adds chemical pond, extra quality filtration tank, pressure filter, spiral pump, sludge thickener, sludge pump and stopping valve etc.Waste water flows into equalizing tank through grid, the sludge pump water-in connects equalizing tank, the sludge pump water outlet inserts the 1st dosing tank, the 1st dosing tank water outlet inserts settling tank, and the settling tank water outlet connects the 6th pump intake, and the 6th pump outlet connects the center thrust-augmenting nozzle water inlet of vertical sedimentation tank, the vertical sedimentation tank water outlet connects the water inlet of the 1st tube settler, the water outlet of the 1st tube settler inserts intermediate pool, and the 2nd dosing tank water outlet connects the 1st pump intake, and the 1st pump outlet inserts intermediate pool.The 5th pump intake connects intermediate pool, the 5th pump outlet connects the aeration tower water-in, the aeration tower water outlet inserts and adds chemical pond, the aeration tower top is provided with venting port, blower inlet is established in the bottom, the 3rd dosing tank water outlet connects the 2nd pump intake, the 2nd pump outlet inserts and adds chemical pond, the 4th pump intake connects and adds chemical pond, the 4th pump outlet inserts the water-in of the 2nd tube settler, the water outlet of the 2nd tube settler connects the water-in of the 3rd water pump, the 2nd tube settler, the 1st tube settler, the water-in that mud mouth is connected to slush pump is all established in perpendicular Liu Dian pond, the water outlet of the 4th water pump connects the water-in of extra quality strainer, the water outlet of extra quality strainer inserts clean water basin, the water-in of recoil pump is connected to clean water basin, the water outlet of recoil pump inserts extra quality strainer, extra quality strainer sets out the mouth of a river and is connected to sludge thickener, the water outlet of slush pump inserts sludge thickener, the sludge thickener spill stream returns equalizing tank, the water-in of spiral pump places the sludge thickener bottom, and the water outlet of spiral pump is connected to the water-in of pressure filter.
Equalizing tank, uneven because of the size in a period of discharged waste water in the production process, it is low that the content of waste water has height to have, and equalizing tank is set in order to the peak valley that scabbles discharge of wastewater with make waste water content homogeneous.The neutralization reaction pond under the acidic solution situation, adds green vitriol in reaction tank, behind green vitriol and the hexavalent chromium wastewater thorough mixing, sexavalent chrome in the waste water is reduced into trivalent chromium earlier, adds the lime neutralization again in reaction tank, and waste water potential of hydrogen (pH value) is controlled at about 8～9.It generates throw out and removes in the inclined-plate clarifying basin sedimentation.Vertical sedimentation tank, come the water liquid of self-neutralization equalizing tank to flow into the pond from thrust-augmenting nozzle lower end, vertical sedimentation tank center water outlet, by reflector block to around be distributed in whole horizontal plane section, slowly up flow, the particle that heavy speed surpasses upflow velocity then is deposited to sludge bucket downwards, and the water after the clarification overflows Chi Chu by the crest of weir around the pond.Tube settler, tube settler are established pond body, water-in, water outlet, sludge outlet, inclined tube honeycomb padding, support etc.With the precipitation principle of rectangular sedimentation tank removal particle dispersion, in the pond, strengthen the pond water-carrying section behind the many inclined tubes of increase, reduce hydraulic radius simultaneously, for this reason when same horizontal flow velocity V, can reduce reynolds number Re greatly, thereby reduce the turbulent fluctuation of water, promote precipitation.Added inclined tube in addition the solids precipitation distance is shortened greatly, when reducing precipitation, deposition efficiency improves greatly.Aeration tower, aeration tower is a circular cylinder body, is provided with body, 1# filler chamber, 2# filler chamber, water-in, aproll circle, water outlet, blast inlet, venting port, manhole, overcurrent plate etc.Waste water enters aeration tower, the gas blower effect makes waste water and air obtain excellent contact, and filling multiaspect hollow ball, Bao earrings or other coarse particles material fully contact with air by waste water in the tower, and the ammonia nitrogen element is broken away from from waste water, the gas emptying, water liquid enters the dosing pond through water port.Add chemical pond, the waste water after blast aeration contains ammonia nitrogen, adds chlorine tablets in the pond, adopts break point chlorination that its residue ammonia nitrogen is converted into harmless nitrogen.Extra quality strainer, extra quality strainer are a circular cylinder body structure, establish body, water inlet pipe, aproll circle, water outlet, water distributor, overcurrent plate, escape pipe etc.In dress quartz sand and gac, colourity in order to remove in the water liquid through post precipitation and in residual fine particle and the water guarantees to discharge water quality reaching standard.Clean water basin store clear water, for the reuse and the extra quality strainer that recoils.
Description of drawings
Fig. 1 is structure composition and the support equipment and the pipeline annexation figure of the embodiment of the invention.
Fig. 2 is the vertical sedimentation tank structural representation of the embodiment of the invention.
Fig. 3 is the aeration tower structural representation of the embodiment of the invention.
Fig. 4 is the tube settler structural representation of the embodiment of the invention.
Fig. 5 is the extra quality filtration tank structural representation of the embodiment of the invention.
Embodiment
Referring to Fig. 1～5, the present invention is provided with grid 1, equalizing tank the 2, the 1st dosing tank the 3, the 2nd dosing tank the 8, the 3rd dosing tank 13, settling tank 4, vertical sedimentation tank the 5, the 1st tube settler the 6, the 2nd tube settler the 14, the 1st water pump the 7, the 2nd water pump 12, recoil pump the 16, the 3rd water pump the 18, the 4th water pump 19, gas blower the 20, the 5th water pump the 21, the 6th water pump 24, slush pump 25, intermediate pool 9, aeration tower 10, adds chemical pond 11, extra quality filtration tank 15, pressure filter 22, spiral pump 23, sludge thickener 26, sludge pump 27 etc.Waste water flows into equalizing tank 2 through grid 1, sludge pump 27 water-ins place equalizing tank 2 bottoms, sludge pump 27 water outlets insert the 1st dosing tank 3, the 1st dosing tank 3 water outlets insert settling tank 4, settling tank 4 water outlets connect the 6th water pump 24 water-ins, the 6th water pump 24 water outlets connect the center thrust-augmenting nozzle water inlet of vertical sedimentation tank 5, vertical sedimentation tank 5 water outlets connect the water inlet of the 1st tube settler 6, the water outlet of the 1st tube settler 6 inserts intermediate pool 9, the 2nd dosing tank 8 water outlets connect the 1st water pump 7 water-ins, and the 1st water pump 7 water outlets insert intermediate pool 9.The 5th water pump 21 water-ins place intermediate pool 9 bottoms, and the 5th water pump 21 water outlets connect aeration tower 10 water-ins, and aeration tower 10 water outlets insert and add chemical pond 11, and aeration tower 10 tops are provided with venting port, and blower inlet is established in the bottom.The 3rd dosing tank 13 water outlets connect the 2nd water pump 12 water-ins, and the 2nd water pump 12 water outlets insert and add chemical pond 11.The 4th water pump 19 water-ins place the bottom that adds chemical pond 11, and the 4th water pump 19 water outlets insert the water-in of the 2nd tube settler 14, and the water outlet of the 2nd tube settler 14 connects the water-in of the 3rd water pump 18.The water-in that mud mouth is connected to slush pump 25 is all established in the 2nd tube settler the 14, the 1st tube settler 6, perpendicular Liu Dian pond 5.The water outlet of the 4th water pump 18 connects the water-in of extra quality strainer 15, and the water outlet of extra quality strainer 15 inserts clean water basin 17, and the water-in of recoil pump 16 is connected to the bottom of clean water basin 17, and the water outlet of recoil pump 16 inserts extra quality strainer 15 bottoms.Extra quality strainer 15 sets out the mouth of a river and is connected to sludge thickener 26, the water outlet of slush pump 25 inserts sludge thickener 26, sludge thickener 26 spill streams return equalizing tank 2, the water-in of spiral pump 23 places sludge thickener 26 bottoms, the water outlet of spiral pump 23 is connected to the water-in of pressure filter 22, and pressure filter 22 compresses the solid slurry that and transports outward.
Referring to Fig. 1 and 2, vertical sedimentation tank 5 is provided with sludge out pipe 101, rising pipe 102, effluent weir 103, suspension bracket 104, center thrust-augmenting nozzle 105, expands water pipe 106, body 107 and aproll circle 108.Spread to aproll circle 108 through water inlet pipe 105, expansion water pipe 106 from the water liquid that settling tank 4 pumps come by the 6th water pump 24, blocking of aproll circle 108 makes water be distributed in whole horizontal plane section all around in body 107, slowly up flow, the particle that heavy speed surpasses upflow velocity then is deposited to sludge bucket downwards.Settled mud is aspirated by slush pump 25 through sludge out pipe 101, and water liquid flow to the 1st tube settler 6 from effluent weir 103 through rising pipe 102.Suspension bracket 104 is used for fixing water inlet pipe 105.
Referring to Fig. 1 and 3, aeration tower 10 is provided with blast inlet 201, support 202, water inlet pipe 203, venting port 204, aproll circle 205, manhole 206,1# filler chamber 207,2# filler chamber 208, overcurrent plate 209, body 210, water outlet 211.Go into water inlet pipe 203 from the water liquid of middle pond the 5th water pump suction, through aproll plate 205 with water liquid to the 207 filling surface expandings of 1# filler chamber, water liquid flows into 2# filler chamber 208 to be continued to filter, under gas blower 20 effects, water liquid and air obtain abundant excellent contact, and 1# filler chamber 207,2# filler chamber 208 load material and be respectively Bao earrings, multiaspect hollow ball or other coarse particles material, and water liquid fully contacts with air, the ammonia nitrogen element is broken away from from water liquid, and gas is discharged from venting port 204.Water liquid enters through water outlet 211 and adds chemical pond 11.Manhole 206 is used to load and unload filler and body 210 internal overhauls.Overcurrent plate 209 is used to put filler and water liquid passes through.The plate face is provided with the perforation more than 1.Support 202 is used to place overcurrent plate 209.
Be provided with water-in 301, inclined tube honeycomb padding 302, water outlet 303, support 304, pond body 305, sludge outlet 306 referring to Fig. 1 and 4, the 1 tube settlers 6.The water liquid that comes from vertical sedimentation tank 5 overflows is in water-in 301 enters pond body 305, precipitate, remove particle dispersion in the advection mode, inclined tube honeycomb padding 302 the water-carrying section that has strengthened pond body 305 is set, reduce hydraulic radius simultaneously, for this reason when same horizontal flow velocity V, can reduce reynolds number Re greatly, thereby reduce the turbulent fluctuation of water, promote precipitation.Inclined tube honeycomb padding 302 shortens the solids precipitation distance greatly, reduces sedimentation time.Water liquid through post precipitation flows into dosing pond 9 from water outlet 303.The mud that precipitation produces is drawn to sludge thickener 26 through sludge outlet 306 by slush pump 25.Support 304 is used to shelve inclined tube honeycomb padding 302.
Be provided with water-in 301, inclined tube honeycomb padding 302, water outlet 303, support 304, pond body 305, sludge outlet 306 referring to Fig. 1 and 4, the 2 tube settlers 14.From dosing settling tank 11 through the water liquid of the 4th water pump 19 suction in water-in 301 enters pond body 305, precipitate, remove particle dispersion in the advection mode, inclined tube honeycomb padding 302 the water-carrying section that has strengthened pond body 305 is set, reduce hydraulic radius simultaneously, for this reason when same horizontal flow velocity V, can reduce reynolds number Re greatly, thereby reduce the turbulent fluctuation of water, promote precipitation.Inclined tube honeycomb padding 302 shortens the solids precipitation distance greatly, reduces sedimentation time.The water liquid of post precipitation is pumped to the water inlet pipe 404 of extra quality strainer 15 by the 3rd water pump 18 from water outlet 303.The mud that precipitation produces is drawn to sludge thickener 26 through sludge outlet 306 by slush pump 25.Support 304 is used to shelve inclined tube honeycomb padding 302.
Referring to Fig. 1 and 5, extra quality filtration tank 15 is provided with body 401,1# filtration chamber 402,2# filtration chamber 403, water inlet pipe 404, refluxing opening 405, aproll circle 406, air outlet 407, manhole 408, overcurrent plate 409, recoil water water-in 410, water outlet 411, water distributor 412.By the 3rd water pump 18 from the water liquid of the 2nd tube settler 14 suction through water inlet pipe 404, spread hydrosphere 406 with 2# filtration chamber 403 filter material surfaces of water liquid expanding to the body 401, water liquid through 2# filtration chamber 403,1# filtration chamber 402 filtrates, remove fine particle, enter clean water basin 17 (recoil pump 16 and stopping valve are closed) from water outlet 411 through water distributor 412.Overcurrent plate 209 is used to place filtrate.The plate face is provided with the perforation more than 1.Recoil pump 16 water-ins connect clean water basin 17, and recoil pump 16 water outlets connect recoil water water-in 410 (water outlet 411 and stopping valve are closed).The filtrate sewage liquid that contains that cleaned that recoils is pumped to sludge sump 26 through refluxing opening 405 by slush pump 25.
Vanadium titanium trade effluent effluent quality after treatment reaches:
PH＝6～9
Suspended substance: 70mg/L
Sexavalent chrome: 0.5mg/L
Ammonia nitrogen: 15mg/L.
Claims (5)
1. a vanadium titanium Industrial Wastewater Treatment device that contains sexavalent chrome and ammonia nitrogen element is characterized in that being provided with grid, equalizing tank, the 1st dosing tank, the 2nd dosing tank, the 3rd dosing tank, settling tank, vertical sedimentation tank, the 1st tube settler, the 2nd tube settler, the 1st water pump, the 2nd water pump, the 3rd water pump, the 4th water pump, the 5th water pump, the 6th water pump, recoil pump, slush pump, intermediate pool, aeration tower, gas blower, adds chemical pond, extra quality filtration tank, pressure filter, spiral pump, sludge thickener, sludge pump etc.;
Waste water flows into equalizing tank through grid, the sludge pump water-in connects equalizing tank, the sludge pump water outlet inserts the 1st dosing tank, the 1st dosing tank water outlet inserts settling tank, the settling tank water outlet connects the 6th pump intake, the 6th pump outlet connects the center thrust-augmenting nozzle water inlet of vertical sedimentation tank, the vertical sedimentation tank water outlet connects the water inlet of the 1st tube settler, the water outlet of the 1st tube settler inserts intermediate pool, the 2nd dosing tank water outlet connects the 1st pump intake, the 1st pump outlet inserts intermediate pool, the 5th pump intake connects intermediate pool, the 5th pump outlet connects the aeration tower water-in, the aeration tower water outlet inserts and adds chemical pond, the aeration tower top is provided with venting port, blower inlet is established in the bottom, the 3rd dosing tank water outlet connects the 2nd pump intake, the 2nd pump outlet inserts and adds chemical pond, the 4th pump intake connects and adds chemical pond, the 4th pump outlet inserts the water-in of the 2nd tube settler, the water outlet of the 2nd tube settler connects the water-in of the 3rd water pump, the 2nd tube settler, the 1st tube settler, the water-in that mud mouth is connected to slush pump is all established in perpendicular Liu Dian pond, the water outlet of the 4th water pump connects the water-in of extra quality strainer, the water outlet of extra quality strainer inserts clean water basin, the water-in of recoil pump is connected to clean water basin, the water outlet of recoil pump inserts extra quality strainer, extra quality strainer sets out the mouth of a river and is connected to sludge thickener, the water outlet of slush pump inserts sludge thickener, the sludge thickener spill stream returns equalizing tank, the water-in of spiral pump places the sludge thickener bottom, and the water outlet of spiral pump is connected to the water-in of pressure filter.
2. a kind of vanadium titanium Industrial Wastewater Treatment device that contains sexavalent chrome and ammonia nitrogen element as claimed in claim 1 is characterized in that, vertical sedimentation tank is provided with sludge out pipe, rising pipe, effluent weir, suspension bracket, center thrust-augmenting nozzle, expands water pipe, body and aproll circle.
3. a kind of vanadium titanium Industrial Wastewater Treatment device that contains sexavalent chrome and ammonia nitrogen element as claimed in claim 1, it is characterized in that aeration tower is provided with body, water-in, aproll circle, water outlet, blast inlet, venting port, manhole, 1# filler chamber, 2# filler chamber, overcurrent plate etc., the aproll circle is located at 1# filler chamber top, and blast inlet is located at 2# filler chamber below.
4. a kind of vanadium titanium Industrial Wastewater Treatment device that contains sexavalent chrome and ammonia nitrogen element as claimed in claim 1 is characterized in that tube settler establishes pond body, water-in, water outlet, sludge outlet, inclined tube honeycomb padding, support etc.
5. a kind of vanadium titanium Industrial Wastewater Treatment device that contains sexavalent chrome and ammonia nitrogen element as claimed in claim 1 is characterized in that extra quality filtration tank is provided with body, water inlet pipe, aproll circle, water outlet, water distributor, overcurrent plate, escape pipe etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118807 CN102190390B (en) | 2010-03-08 | 2010-03-08 | Vanadium and titanium industrial wastewater treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010118807 CN102190390B (en) | 2010-03-08 | 2010-03-08 | Vanadium and titanium industrial wastewater treatment device |
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| Publication Number | Publication Date |
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| CN102190390A true CN102190390A (en) | 2011-09-21 |
| CN102190390B CN102190390B (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010118807 Expired - Fee Related CN102190390B (en) | 2010-03-08 | 2010-03-08 | Vanadium and titanium industrial wastewater treatment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691296A (en) * | 2013-12-12 | 2014-04-02 | 上海龙净环保科技工程有限公司 | Water circulating system and method of PM2.5 flue gas treatment tower |
| CN105540791A (en) * | 2015-12-30 | 2016-05-04 | 湖北中碧环保科技股份有限公司 | Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland |
| CN107721100A (en) * | 2017-11-30 | 2018-02-23 | 安徽省高迪科技有限公司 | A kind of villages and small towns sewage-treatment plant |
| CN108975621A (en) * | 2018-08-13 | 2018-12-11 | 漳州香洲皮革有限公司 | A kind of the sewage classification processing system and processing method of leather production |
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| US6358396B1 (en) * | 2000-05-08 | 2002-03-19 | U. T. Battelle, Llc | Regeneration of anion exchange resins by catalyzed electrochemical reduction |
| JP2005040654A (en) * | 2003-07-22 | 2005-02-17 | Ishikawajima Harima Heavy Ind Co Ltd | Method for manufacturing nox decomposing catalyst |
| CN101050014A (en) * | 2007-04-27 | 2007-10-10 | 遵义钛业股份有限公司 | Method for treating wastewater containing copper and vanadium |
| CN101070214A (en) * | 2007-06-12 | 2007-11-14 | 遵义钛业股份有限公司 | Method for disposing waste liquid from process of refining titanium tetrachloride by copper wire vanadium removal |
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2010
- 2010-03-08 CN CN 201010118807 patent/CN102190390B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6358396B1 (en) * | 2000-05-08 | 2002-03-19 | U. T. Battelle, Llc | Regeneration of anion exchange resins by catalyzed electrochemical reduction |
| JP2005040654A (en) * | 2003-07-22 | 2005-02-17 | Ishikawajima Harima Heavy Ind Co Ltd | Method for manufacturing nox decomposing catalyst |
| CN101050014A (en) * | 2007-04-27 | 2007-10-10 | 遵义钛业股份有限公司 | Method for treating wastewater containing copper and vanadium |
| CN101070214A (en) * | 2007-06-12 | 2007-11-14 | 遵义钛业股份有限公司 | Method for disposing waste liquid from process of refining titanium tetrachloride by copper wire vanadium removal |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691296A (en) * | 2013-12-12 | 2014-04-02 | 上海龙净环保科技工程有限公司 | Water circulating system and method of PM2.5 flue gas treatment tower |
| CN103691296B (en) * | 2013-12-12 | 2016-03-23 | 上海龙净环保科技工程有限公司 | A kind of PM2.5 smoke gas treatment tower water circulation system and method |
| CN105540791A (en) * | 2015-12-30 | 2016-05-04 | 湖北中碧环保科技股份有限公司 | Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland |
| CN105540791B (en) * | 2015-12-30 | 2018-10-23 | 湖北中碧环保科技股份有限公司 | A kind of pretreatment unit and its technique of artificial swamp raw water |
| CN107721100A (en) * | 2017-11-30 | 2018-02-23 | 安徽省高迪科技有限公司 | A kind of villages and small towns sewage-treatment plant |
| CN108975621A (en) * | 2018-08-13 | 2018-12-11 | 漳州香洲皮革有限公司 | A kind of the sewage classification processing system and processing method of leather production |
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| CN102190390B (en) | 2013-06-26 |
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