CN105174533A - Electroplating wastewater treatment technology - Google Patents

Electroplating wastewater treatment technology Download PDF

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Publication number
CN105174533A
CN105174533A CN201510496955.5A CN201510496955A CN105174533A CN 105174533 A CN105174533 A CN 105174533A CN 201510496955 A CN201510496955 A CN 201510496955A CN 105174533 A CN105174533 A CN 105174533A
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China
Prior art keywords
pond
flocculation
waste water
wadding
water
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CN201510496955.5A
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Chinese (zh)
Inventor
徐成
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ZHEJIANG JIEHUA ELECTRONICS CO Ltd
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ZHEJIANG JIEHUA ELECTRONICS CO Ltd
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Priority to CN201510496955.5A priority Critical patent/CN105174533A/en
Publication of CN105174533A publication Critical patent/CN105174533A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an electroplating wastewater treatment technology, and aims to provide the electroplating wastewater treatment technology which is reasonable in technological process, simple and clear in process, strong in treatment ability and smooth and efficient in treatment process and can effectively eliminate cyanide ions or cyanides contained in wastewater. The electroplating wastewater treatment technology includes the following steps: after injecting the electroplating wastewater into a first-level cyanide breaking pond, adjusting the pH, injecting sodium hypochlorite to the first-level cyanide breaking pond, and making cyanide in the wastewater become cyanates; injecting the wastewater after first-level cyanide breaking into a second-level cyanide breaking pond, adjusting the pH, injecting sodium hypochlorite to the second-level cyanide breaking pond, and decomposing the cyanates in the wastewater into carbon dioxide and water; allowing the wastewater to enter a buffer pond, and then entering a coagulating pond and a flocculation pond; removing flocculated particles in the wastewater after flocculation by a flocculation removing device, discharging the wastewater into a pH adjustment pond and a collection pond, and then carrying out secondary coagulation and secondary flocculation; removing flocculated particles with another flocculation removing device, and discharging directly the wastewater; and collecting the removed flocculated particles, sending into a sludge filter press, and carrying out filter pressing.

Description

A kind of electroplating waste processing process
Technical field
The invention belongs to technical field of waste water processing, particularly relate to a kind of electroplating waste processing process.
Background technology
The source of electroplating wastewater is generally: (1) plating piece rinse water; (2) spent plating bath; (3) other waste water, comprise and wash away mill floor, scrub pole plate wash water, ventilation installation water of condensation, and due to the various tank liquor of coating bath seepage or operational administrative improper " run, drip, leak " that cause and draining.The processing condition of the water quality of electroplating wastewater, the water yield and Electroplating Production, produce load, operational administrative and, the factor such as water mode is relevant.The water quality of electroplating wastewater is complicated, and cryanide ion wherein, belongs to carcinogenic, teratogenesis, mutagenic highly toxic substance, must deal carefully with, and makes that its content is up to standard just can carry out discharge of wastewater afterwards.And current electroplating effluent treatment method, in the thoroughness, high efficiency, convenience etc. of process, still have significantly shortcoming and deficiency.
Summary of the invention
The present invention is to overcome deficiency of the prior art, provides a kind of flow process reasonable, and process is simple and clear, effectively can eliminate the cryanide ion or prussiate that contain in waste water, and processing power is strong, the smooth electroplating waste processing process efficiently for the treatment of processes.
To achieve these goals, the present invention is by the following technical solutions:
A kind of electroplating waste processing process, comprises the following steps:
A. cyanide wastewater is carried out one-level broken cyanide in one-level broken cyanide pond: after electroplating wastewater injects one-level broken cyanide pond, regulate pH value to 10.5-11.5, in one-level broken cyanide pond, inject clorox, make the cyanogen in waste water become cyanate;
B. secondary broken cyanide is carried out: the waste water after one-level broken cyanide is injected secondary broken cyanide pond, regulate pH value to 7.5-8.5, clorox is injected again in secondary broken cyanide pond, further for cyanate in waste water oxygenolysis is become carbonic acid gas and water, and the Cyanide in Waste Water U content after secondary broken cyanide is lower than 0.01 mg/litre;
C. make the waste water after secondary broken cyanide enter Buffer Pool, then enter in coagulation basin, add coagulated agent and carry out coagulation;
D. make the waste water after coagulation enter in flocculation basin, add flocculation medicament and flocculate;
E. utilize except the coagulated particles in waste water after wadding device removing flocculation, then waste water enters PH and adjusts pond, and adjustment pH value is to 6-9;
F. the waste water after step e process enters collecting tank, then enters another coagulation basin, adds coagulated agent and carries out two-stage coagulation; Waste water after two-stage coagulation enters another flocculation basin, adds flocculation medicament and carries out secondary flocculation;
G. utilize another to remove coagulated particles after the flocculation of wadding device removing secondary in waste water, waste water then can directly discharge;
H. by removing after the coagulated particles that gets off collects in step e, g, sending into sludge filter press and carrying out press filtration, obtaining compression mud.
This ratio juris be waste water in the basic conditions, chlorine system oxygenant (clorox) is adopted to be destroyed and the method for removing by prussiate, treating processes is divided into two stages, and the first stage is the incomplete oxidation stage: cyanogen is oxidized to cyanate, destroys not thorough to cyanogen; Subordinate phase is the complete oxidation stage, and further for cyanate oxygenolysis is become carbonic acid gas and water.
As preferably, in step a, utilize sodium hydroxide to regulate pH value, the redox potential after one-level broken cyanide is 320-370mv.
As preferably, in stepb, utilize sulfuric acid to regulate pH value, the redox potential after secondary broken cyanide is 620-670mv.
As preferably, described coagulated agent is aluminium chlorohydroxide, and described flocculation medicament is polyacrylamide.Aluminium chlorohydroxide (PAC) is usually also referred to as water purification agent or coagulating agent, and it is a kind of water-soluble inorganic high molecular polymer; Polyacrylamide (PAM) is conventional non-ionic type polymeric flocculant, and molecular weight 1,500,000-2,000 ten thousand, commodity concentration is generally 8%.Organic polymer coargulator has the effect forming larger flco between particle.
As preferably, the described wadding device that removes comprises filtration transport unit, all to wad a quilt with cotton device, be located at the rising pipe on flocculation basin, rising pipe water outlet down, described all waddings device comprises air pump of all wadding a quilt with cotton, some all waddings tracheaes stretched in flocculation basin, tracheae of all wadding a quilt with cotton connects the air outlet of air pump of all wadding a quilt with cotton, described filtration transport unit comprises filter bar transmission belt, two filtration belt wheels, two brush bar belt wheels, two transition pulley, the filter bar transmission belt part be between two brush bar belt wheel tops is fillter section, the filter bar transmission belt part be between two brush bar belt wheels is the clear section of brush, PH adjusts pond fluid inlet and is in immediately below rising pipe water outlet, fillter section is in PH and adjusts between pond fluid inlet and rising pipe water outlet, also comprise pond of grafting clay, for cleaning the brush wheel brushing clear section with water, described brush wheel, brush clear section to be all in above pond of grafting clay.After adding flocculation in waste water medicament completing flocculation process, need removing flco (particle).In this programme, waste water flocculates in flocculation basin, after flocculation, do not adopt the conventional precipitator method, but utilize air pump of all wadding a quilt with cotton constantly to be filled with in flocculation basin through tracheae of all wadding a quilt with cotton by gas, make flco (coagulated particles, be exactly mud after its precipitate and separate) all suspend (dynamically) in waste water, waste water is then continuous discharges from rising pipe, waste water is after filtration after section, flow into PH and adjust pond, flco then by filter bar transmission belt (fillter section), has been stayed on filter bar transmission belt (fillter section).Flco on fillter section, along with the movement of filter bar transmission belt reaches the clear section of brush, under the effect of brush wheel, falls and grafts clay in pond.In whole process, do not need to carry out precipitating and waiting for, without the need to through sediment structure (tube settler as conventional), except wadding process is lasting, continuous print, not only except wadding is effective, and greatly save the time of wastewater treatment process yet.
As preferably, described filter bar transmission belt is in fillter section and the part of brushing between clear section is the dry section of heat, is provided with well heater, also comprises a water receiving swash plate above the described heat section of doing, water receiving swash plate lower end is connected to PH and adjusts Chi Jinyekouchu, and described water receiving swash plate is in the below of the dry section of heat.Moisture flco (being also namely with sewage sludge) reaches the dry section of heat, portion of water is lost by heating, thus be more conducive to follow-up by under brush wheel brush, the existence of water receiving swash plate, the waste water that heat can be allowed to do in section in moisture flco can adjust pond by diversed time PH after falling, and avoids polluting surrounding enviroment.
As preferably, described flocculation basin is a closed cell body, flocculation basin is provided with the liquid-inlet pipe for entering waste water, the muffler for giving vent to anger, muffler is communicated with the inlet mouth of air pump of all wadding a quilt with cotton, described all waddings tracheae stretches in flocculation basin bottom flocculation basin, and the outgassing direction of described tracheae of all wadding a quilt with cotton is for from the bottom to top.The air feed of air pump of all wadding a quilt with cotton is circulation, the utilization ratio of " gas of all wadding a quilt with cotton " (passing into the gas in flocculation basin) can be improved, after adopting closed-loop arrangement simultaneously, be equivalent to muffler place and there is negative pressure, and tracheae place of all wadding a quilt with cotton has malleation, be more conducive to increase the pressure reduction between turnover gas position, reduce air inlet difficulty, improve effect of all wadding a quilt with cotton.
As preferably, two brush bar belt wheel lines of centres are vertical, the width between centers of two brush bar belt wheels is less than the length of brushing clear section, tightening pulley, tensioning cylinder is provided with between two brush bar belt wheels, the piston rod of described tensioning cylinder is provided with axostylus axostyle, described axostylus axostyle and tightening pulley are rotationally connected and coaxial, the described clear section surface of tightening pulley wiper.Also comprise and blow the portion of shaking, the described portion of shaking of blowing comprises the intermittent aeration pipe be communicated with an intermittent aeration pump, the some blow heads be connected with intermittent aeration pipe, the blowing direction of described blow head is towards tightening pulley, and described tightening pulley, intermittent aeration pipe divide to be in brushes clear section both sides.Tensioning cylinder piston rod ejects, when tightening pulley pushes down brush clear section, the clear section of whole brush is tensioning, and during the withdrawal of tensioning cylinder piston rod, brushing clear section is in relaxation state, so, as long as tensioning cylinder piston rod stretches back and forth, in cooperation, blow head interval blows the clear section of brush (blowing when tightening pulley does not push down brush clear section), and the clear section of brush just can be allowed constantly to vibrate, thus realizes the effect of " trembling mud " (allowing the flco be stuck in the clear section of brush shake off).Contribute to promoting the effect removing flco on filter bar transmission belt.
The invention has the beneficial effects as follows: have multistage broken cyanide step, flow process is reasonable, and broken cyanide is thorough; There is multiple solidifying wadding step such as coagulation, flocculation, can ensure to discharge water quality; Except wadding step is successive coherent, and do not have the independent residence time, whole process continuity is strong, and working efficiency is high.。
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention removes wadding device;
Fig. 2 is the partial enlarged drawing of Fig. 1.
In figure: rising pipe 1, all wadding air pump 2, all wadding tracheae 3, filter bar transmission belt 4, filtration belt wheel 5, brush bar belt wheel 6, transition pulley 7, PH adjust pond 8, pond 9 of grafting clay, brush wheel 10, well heater 11, water receiving swash plate 12, liquid-inlet pipe 13, muffler 14, tightening pulley 15, tensioning cylinder 16, intermittent aeration pipe 17, blow head 18, flocculation basin 19.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of electroplating waste processing process, comprises the following steps:
A. cyanide wastewater is carried out one-level broken cyanide in one-level broken cyanide pond: after electroplating wastewater injects one-level broken cyanide pond, regulate pH value to 10.5-11.5, in one-level broken cyanide pond, inject clorox, make the cyanogen in waste water become cyanate;
B. secondary broken cyanide is carried out: the waste water after one-level broken cyanide is injected secondary broken cyanide pond, regulate pH value to 7.5-8.5, clorox is injected again in secondary broken cyanide pond, further for cyanate in waste water oxygenolysis is become carbonic acid gas and water, and the Cyanide in Waste Water U content after secondary broken cyanide is lower than 0.01 mg/litre;
C. make the waste water after secondary broken cyanide enter Buffer Pool, then enter in coagulation basin, add coagulated agent and carry out coagulation;
D. make the waste water after coagulation enter in flocculation basin, add flocculation medicament and flocculate;
E. utilize except the coagulated particles in waste water after wadding device removing flocculation, then waste water enters PH and adjusts pond, and adjustment pH value is to 6-9;
F. the waste water after step e process enters collecting tank, then enters another coagulation basin, adds coagulated agent and carries out two-stage coagulation; Waste water after two-stage coagulation enters another flocculation basin, adds flocculation medicament and carries out secondary flocculation;
G. utilize another to remove coagulated particles after the flocculation of wadding device removing secondary in waste water, waste water then can directly discharge;
H. by removing after the coagulated particles that gets off collects in step e, g, sending into sludge filter press and carrying out press filtration, obtaining compression mud.
This ratio juris be waste water in the basic conditions, chlorine system oxygenant (clorox) is adopted to be destroyed and the method for removing by prussiate, treating processes is divided into two stages, and the first stage is the incomplete oxidation stage: cyanogen is oxidized to cyanate, destroys not thorough to cyanogen; Subordinate phase is the complete oxidation stage, and further for cyanate oxygenolysis is become carbonic acid gas and water.PH10.5-11.5 during one-level broken cyanide, PH7.5-8.5 during secondary broken cyanide, the mol ratio of incomplete oxidation stage clorox and cryanide ion is more than or equal to 3.5, and the mol ratio of complete oxidation stage clorox and cryanide ion is 10.The reaction times in two stages is 15 to 25 minutes, if PH is higher, suitably can shorten the time.
In step a, utilize sodium hydroxide to regulate pH value, the redox potential after one-level broken cyanide is 320-370mv.In stepb, utilize sulfuric acid to regulate pH value, the redox potential after secondary broken cyanide is 620-670mv.Described coagulated agent is aluminium chlorohydroxide, and described flocculation medicament is polyacrylamide.Aluminium chlorohydroxide (PAC) is usually also referred to as water purification agent or coagulating agent, and it is a kind of water-soluble inorganic high molecular polymer; Polyacrylamide (PAM) is conventional non-ionic type polymeric flocculant, and molecular weight 150 ten thousand to 2,000 ten thousand, commodity concentration is generally 8%.Organic polymer coargulator has the effect forming larger flco between particle.
As Fig. 1, shown in Fig. 2, the described wadding device that removes comprises filtration transport unit, all to wad a quilt with cotton device, be located at the rising pipe 1 on flocculation basin 19, rising pipe water outlet down, described all waddings device comprises air pump 2 of all wadding a quilt with cotton, some all waddings tracheaes 3 stretched in flocculation basin, tracheae of all wadding a quilt with cotton connects the air outlet of air pump of all wadding a quilt with cotton, described filtration transport unit comprises filter bar transmission belt 4, two filtration belt wheels 5, two brush bar belt wheels 6, two transition pulley 7, the filter bar transmission belt part be between two brush bar belt wheel tops is fillter section, the filter bar transmission belt part be between two brush bar belt wheels is the clear section of brush, PH adjusts pond 8 fluid inlet and is in immediately below rising pipe water outlet, fillter section is in PH and adjusts between pond fluid inlet and rising pipe water outlet, also comprise pond 9 of grafting clay, for cleaning the brush wheel 10 brushing clear section with water, described brush wheel, brush clear section to be all in above pond of grafting clay.After adding flocculation in waste water medicament completing flocculation process, need removing flco (particle).After waste water flocculating, air pump of all wadding a quilt with cotton is utilized constantly to be filled with in flocculation basin through tracheae of all wadding a quilt with cotton by gas, make flco (coagulated particles, be exactly mud after its precipitate and separate) all suspend (dynamically) in waste water, waste water is then continuous discharges from rising pipe, and waste water, after filtration after section, flow into PH and adjusts pond, flco then by filter bar transmission belt (fillter section), has been stayed on filter bar transmission belt (fillter section).Flco on fillter section, along with the movement of filter bar transmission belt reaches the clear section of brush, under the effect of brush wheel, falls and grafts clay in pond.In whole process, do not need to carry out precipitating and waiting for, without the need to through sediment structure (tube settler as conventional), except wadding process is lasting, continuous print, not only except wadding is effective, and greatly save the time of wastewater treatment process yet.
Described filter bar transmission belt is in fillter section and the part of brushing between clear section is the dry section of heat, well heater 11 is provided with above the described heat section of doing, also comprise a water receiving swash plate 12, water receiving swash plate lower end is connected to PH and adjusts Chi Jinyekouchu, and described water receiving swash plate is in the below of the dry section of heat.Moisture flco (being also namely with sewage sludge) reaches the dry section of heat, portion of water is lost by heating, thus be more conducive to follow-up by under brush wheel brush, the existence of water receiving swash plate, the waste water that heat can be allowed to do in section in moisture flco can adjust pond by diversed time PH after falling, and avoids polluting surrounding enviroment.And the main effect of well heater is dried filter bar transmission belt after work completes, brush wheel during oven dry, is utilized thoroughly to clear up filter bar transmission belt in passing.
Described flocculation basin is a closed cell body, flocculation basin is provided with the liquid-inlet pipe 13 for entering waste water, the muffler 14 for giving vent to anger, muffler is communicated with the inlet mouth of air pump of all wadding a quilt with cotton, described all waddings tracheae stretches in flocculation basin bottom flocculation basin, and the outgassing direction of described tracheae of all wadding a quilt with cotton is for from the bottom to top.The air feed of air pump of all wadding a quilt with cotton is circulation, the utilization ratio of " gas of all wadding a quilt with cotton " (passing into the gas in flocculation basin) can be improved, after adopting closed-loop arrangement simultaneously, be equivalent to muffler place and there is negative pressure, and tracheae place of all wadding a quilt with cotton has malleation, be more conducive to increase the pressure reduction between turnover gas position, reduce air inlet difficulty, improve effect of all wadding a quilt with cotton.
Two brush bar belt wheel lines of centres are vertical, the width between centers of two brush bar belt wheels is less than the length of brushing clear section, tightening pulley 15, tensioning cylinder 16 is provided with between two brush bar belt wheels, the piston rod of described tensioning cylinder is provided with axostylus axostyle, described axostylus axostyle and tightening pulley are rotationally connected and coaxial, the described clear section surface of tightening pulley wiper.Also comprise and blow the portion of shaking, the described portion of shaking of blowing comprises the intermittent aeration pipe 17 be communicated with an intermittent aeration pump, the some blow heads 18 be connected with intermittent aeration pipe, the blowing direction of described blow head is towards tightening pulley, and described tightening pulley, intermittent aeration pipe divide to be in brushes clear section both sides.Tensioning cylinder piston rod ejects, when tightening pulley pushes down brush clear section, the clear section of whole brush is tensioning, and during the withdrawal of tensioning cylinder piston rod, brushing clear section is in relaxation state, so, as long as tensioning cylinder piston rod stretches back and forth, in cooperation, blow head interval blows the clear section of brush (blowing when tightening pulley does not push down brush clear section), and the clear section of brush just can be allowed constantly to vibrate, thus realizes the effect of " trembling mud " (allowing the mud be stuck in the clear section of brush shake off).Contribute to promoting the effect removing flco on filter bar transmission belt.Need it is once more emphasized that, flco above, floc particle, mud are equivalent, the different expression just under different positions, different states.

Claims (9)

1. an electroplating waste processing process, is characterized in that, comprises the following steps:
A. cyanide wastewater is carried out one-level broken cyanide in one-level broken cyanide pond: after electroplating wastewater injects one-level broken cyanide pond, regulate pH value to 10.5-11.5, in one-level broken cyanide pond, inject clorox, make the cyanogen in waste water become cyanate;
B. secondary broken cyanide is carried out: the waste water after one-level broken cyanide is injected secondary broken cyanide pond, regulate pH value to 7.5-8.5, clorox is injected again in secondary broken cyanide pond, further for cyanate in waste water oxygenolysis is become carbonic acid gas and water, and the Cyanide in Waste Water U content after secondary broken cyanide is lower than 0.01 mg/litre;
C. make the waste water after secondary broken cyanide enter Buffer Pool, then enter in coagulation basin, add coagulated agent and carry out coagulation;
D. make the waste water after coagulation enter in flocculation basin, add flocculation medicament and flocculate;
E. utilize except the coagulated particles in waste water after wadding device removing flocculation, then waste water enters PH and adjusts pond, and adjustment pH value is to 6-9;
F. the waste water after step e process enters collecting tank, then enters another coagulation basin, adds coagulated agent and carries out two-stage coagulation; Waste water after two-stage coagulation enters another flocculation basin, adds flocculation medicament and carries out secondary flocculation;
G. utilize another to remove coagulated particles after the flocculation of wadding device removing secondary in waste water, waste water then can directly discharge;
H. by removing after the coagulated particles that gets off collects in step e, g, sending into sludge filter press and carrying out press filtration, obtaining compression mud.
2. a kind of electroplating waste processing process according to claim 1, is characterized in that, in step a, utilize sodium hydroxide to regulate pH value, the redox potential after one-level broken cyanide is 320-370mv.
3. a kind of electroplating waste processing process according to claim 1, is characterized in that, in stepb, utilize sulfuric acid to regulate pH value, the redox potential after secondary broken cyanide is 620-670mv.
4. a kind of electroplating waste processing process according to claim 1 or 2 or 3, it is characterized in that, described coagulated agent is aluminium chlorohydroxide, described flocculation medicament is polyacrylamide.
5. a kind of electroplating waste processing process according to claim 1, it is characterized in that, the described wadding device that removes comprises filtration transport unit, all to wad a quilt with cotton device, be located at the rising pipe on flocculation basin, rising pipe water outlet down, described all waddings device comprises air pump of all wadding a quilt with cotton, some all waddings tracheaes stretched in flocculation basin, tracheae of all wadding a quilt with cotton connects the air outlet of air pump of all wadding a quilt with cotton, described filtration transport unit comprises filter bar transmission belt, two filtration belt wheels, two brush bar belt wheels, two transition pulley, the filter bar transmission belt part be between two brush bar belt wheel tops is fillter section, the filter bar transmission belt part be between two brush bar belt wheels is the clear section of brush, PH adjusts pond fluid inlet and is in immediately below rising pipe water outlet, fillter section is in PH and adjusts between pond fluid inlet and rising pipe water outlet, also comprise pond of grafting clay, for cleaning the brush wheel brushing clear section with water, described brush wheel, brush clear section to be all in above pond of grafting clay.
6. a kind of electroplating waste processing process according to claim 5, it is characterized in that, described filter bar transmission belt is in fillter section and the part of brushing between clear section is the dry section of heat, well heater is provided with above the described heat section of doing, also comprise a water receiving swash plate, water receiving swash plate lower end is connected to PH and adjusts Chi Jinyekouchu, and described water receiving swash plate is in the below of the dry section of heat.
7. a kind of electroplating waste processing process according to claim 5, it is characterized in that, described flocculation basin is a closed cell body, flocculation basin is provided with the liquid-inlet pipe for entering waste water, the muffler for giving vent to anger, muffler is communicated with the inlet mouth of air pump of all wadding a quilt with cotton, described all waddings tracheae stretches in flocculation basin bottom flocculation basin, and the outgassing direction of described tracheae of all wadding a quilt with cotton is for from the bottom to top.
8. a kind of electroplating waste processing process according to claim 5, it is characterized in that, two brush bar belt wheel lines of centres are vertical, the width between centers of two brush bar belt wheels is less than the length of brushing clear section, tightening pulley, tensioning cylinder is provided with between two brush bar belt wheels, the piston rod of described tensioning cylinder is provided with axostylus axostyle, and described axostylus axostyle and tightening pulley are rotationally connected and coaxial, the described clear section surface of tightening pulley wiper.
9. a kind of electroplating waste processing process according to claim 8, it is characterized in that, also comprise and blow the portion of shaking, the described portion of shaking of blowing comprises the intermittent aeration pipe be communicated with an intermittent aeration pump, the some blow heads be connected with intermittent aeration pipe, the blowing direction of described blow head is towards tightening pulley, and described tightening pulley, intermittent aeration pipe divide to be in brushes clear section both sides.
CN201510496955.5A 2015-08-13 2015-08-13 Electroplating wastewater treatment technology Pending CN105174533A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105967386A (en) * 2016-05-26 2016-09-28 江苏兴隆防腐设备有限公司 Chromium-ion-containing wastewater treatment technology
CN108751492A (en) * 2018-06-01 2018-11-06 安徽得奇环保科技股份有限公司 A kind of electroplating cyanic waste water processing method

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Publication number Priority date Publication date Assignee Title
CN202942714U (en) * 2012-09-19 2013-05-22 南京蓝深制泵(集团)股份有限公司 Rotary filter screen type grating cleaner
CN103539303A (en) * 2013-11-15 2014-01-29 中冶华天工程技术有限公司 Electroplating wastewater treating and recycling process and system
CN203904113U (en) * 2014-06-19 2014-10-29 苏州市环境保护有限公司 Classified treatment equipment for sewage
CN203943041U (en) * 2014-06-13 2014-11-19 上虞冠峰食品机械有限公司 Multi-function washing machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202942714U (en) * 2012-09-19 2013-05-22 南京蓝深制泵(集团)股份有限公司 Rotary filter screen type grating cleaner
CN103539303A (en) * 2013-11-15 2014-01-29 中冶华天工程技术有限公司 Electroplating wastewater treating and recycling process and system
CN203943041U (en) * 2014-06-13 2014-11-19 上虞冠峰食品机械有限公司 Multi-function washing machine
CN203904113U (en) * 2014-06-19 2014-10-29 苏州市环境保护有限公司 Classified treatment equipment for sewage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105967386A (en) * 2016-05-26 2016-09-28 江苏兴隆防腐设备有限公司 Chromium-ion-containing wastewater treatment technology
CN108751492A (en) * 2018-06-01 2018-11-06 安徽得奇环保科技股份有限公司 A kind of electroplating cyanic waste water processing method

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Application publication date: 20151223