CN102774977A - Method capable of high efficiency removal of phosphorus in coating waste water - Google Patents
Method capable of high efficiency removal of phosphorus in coating waste water Download PDFInfo
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- CN102774977A CN102774977A CN2011101186733A CN201110118673A CN102774977A CN 102774977 A CN102774977 A CN 102774977A CN 2011101186733 A CN2011101186733 A CN 2011101186733A CN 201110118673 A CN201110118673 A CN 201110118673A CN 102774977 A CN102774977 A CN 102774977A
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Abstract
The invention discloses a method capable of high efficiency removal of phosphorus in coating waste water. The method is characterized by being realized through the following steps: (1) adding CaCO3 into acidic coating waste water, adjusting a pH value of an obtained mixture to be 6.5 to 8, carrying out full stirring, then adding polymeric aluminum ferric chloride (PAFC) and a small amount of PAM into the waste water, filtering obtained deposit and subjecting the waste water to secondary deposition; and (2) adding NaOH into the waste water undergone secondary deposition so as to adjust the pH value until the pH value is no less than 11, then adding CaCl2 into secondary waste water, carrying out full stirring, then adding PAM, carrying out filtration after a reaction is completely finished and discharging the waste water. The method provided by the invention has a phosphorus removal rate of more than 90% and 99.5% in the two steps, respectively; reagents used in the method are economical, the method is simple, and waste water can stably reach discharge standard.
Description
Technical field
The present invention relates to a kind of method of handling phosphorus in the coating wastewater, belong to the technical field that chemical process is disposed of sewage, the particularly a kind of method that can efficiently remove phosphorus in the coating wastewater.
Background technology
The pollutent of coating wastewater discharging mainly contains organism (COD), PH, suspended substance and phosphoric acid salt etc., and as not treated and in line, the peripheral region will be seriously contaminated.
Prior art is to adopt acid coating wastewater alkalization precipitation process; Wherein concrete shortcoming is: in the prior art; The method of handling coating wastewater mainly is through adding the method for NaOH; The tart coating wastewater is alkalized, in waste water, add aluminium iron polychloride again and carry out primary sedimentation, add CaCl after the filtration again
2Remove the phosphorus in the waste water.Because the content of phosphorus does not wait at 30mg/L-300ml/L in the coating wastewater, even reach more than the 300ml/L, too high with the cost that this method is handled, and handle the back water unstable, can not qualified discharge, make body eutrophication, cause environmental pollution.
Summary of the invention
The technical problem that the present invention will solve is: a kind of method that can efficiently remove phosphorus in the coating wastewater is provided, and processing cost is cheap, and method is simple, and simultaneously processed waste water can be stablized and reaches emission standard.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method that can efficiently remove phosphorus in the coating wastewater is to realize through following step:
(1) adds CaCO in the oxytropism coating wastewater
3, PH is adjusted between the 6.5-8, fully stir the back and in said waste water, add aluminium iron polychloride (PAFC) and a small amount of PAM, the sedimentation and filtration of formation, waste water gets into secondary sedimentation;
(2) add NaOH to the waste water that gets into secondary sedimentation and carry out the PH readjustment,, in secondary wastewater, add CaCl again to PH>=11
2, add PAM again, the after-filtration that reacts completely, discharge of wastewater after fully stirring.
The initial temperature of the acid coating wastewater in the said step (1) is controlled between 20-30 ℃.
Aluminium chloride ferrum (PAFC) concentration in the said step (1) is 5-10%.
PAM concentration in the said step (1) is 1-2%.
The addition of all ingredients is PAFC in the said step (1): PAM: waste water=0.5-2.5 (g): 1-1.5 (g): 1000 (ml).
The addition of all ingredients is CaCl in the said step (2)
2: PAM: waste water=10-50 (g): 1-1.5 (g): 1000 (ml).
The present invention adopts CaCO
3Regulate PH, saved a large amount of sodium hydroxide, and there be a certain amount of Ca in the waste water this moment
2+, help subsequent disposal.
The present invention is after step (1) processing finishes, and the clearance of phosphorus can adsorb most of heavy metal ion and heavy metal complex simultaneously more than 90% in the waste water at this moment.
The waste water that the present invention gets into secondary sedimentation carries out the PH readjustment, through adding the method for an amount of NaOH, also can add an amount of milk of lime and alkalizes in order to practice thrift cost; If mud that produce also can be more but adding milk of lime is excessive; When finishing dealing with, at this moment, total phosphorus goes the rate of falling can reach more than 99.5% at last; Reach effluent standard, can adsorb some heavy metal ion simultaneously.
The invention has the beneficial effects as follows: processing cost is cheap, and method is simple, and simultaneously processed waste water can be stablized and reaches emission standard; The processing rate of first step phosphorus reaches more than 90%, and the processing rate of the second step phosphorus reaches more than 99.5%.
Embodiment
Combine embodiment that the present invention is done further detailed explanation at present.
Embodiment 1
Handle the 5L coating wastewater, wherein its phosphorous 200ml/L of initial detecting.
(1) under 20 ℃ of conditions,, PH adds CaCO in being 4.5 coating wastewater
3, make PH be adjusted in 6.5, stop to add, fully stirring the back in said waste water, to add concentration be 5% aluminium iron polychloride (PAFC) 2.5g with concentration is 1% PAM 5g, the sedimentation and filtration of formation, waste water entering secondary sedimentation;
(2) add NaOH to the waste water that gets into secondary sedimentation and carry out the PH readjustment, to PH be 11, in secondary wastewater, add the CaCl of 50g again
2, fully stirring the PAM that adds 5g afterwards again, after-filtration reacts completely.
Record the phosphorous of water after the processing, greater than 99.5% less than 1ml/L.
Embodiment 2
Handle the 10L coating wastewater, wherein its phosphorous 380ml/L of initial detecting.
(1) under 30 ℃ of conditions,, PH adds CaCO in being 4.0 coating wastewater
3, make PH be adjusted in 8, stop to add, fully stirring the back in said waste water, to add concentration be 7% aluminium iron polychloride (PAFC) 25g with concentration is 2% PAM 15g, the sedimentation and filtration of formation, waste water entering secondary sedimentation;
(2) add NaOH to the waste water that gets into secondary sedimentation and carry out the PH readjustment, to PH be 12, in secondary wastewater, add the CaCl of 300g again
2, fully stirring the PAM that adds 15g afterwards again, after-filtration reacts completely.
Record the phosphorous of water after the processing, greater than 99.8% less than 0.97ml/L.
Embodiment 3
Handle the 10L coating wastewater, wherein its phosphorous 500ml/L of initial detecting.
(1) under 30 ℃ of conditions,, PH adds CaCO in being 4.0 coating wastewater
3, make PH be adjusted in 7.5, stop to add, fully stirring the back in said waste water, to add concentration be 10% aluminium iron polychloride (PAFC) 20g with concentration is 2% PAM 15g, the sedimentation and filtration of formation, waste water entering secondary sedimentation;
(2) add NaOH to the waste water that gets into secondary sedimentation and carry out the PH readjustment, to PH be 12, in secondary wastewater, add the CaCl of 250g again
2, fully stirring the PAM that adds 15g afterwards again, after-filtration reacts completely.
Record the phosphorous of water after the processing, greater than 99.5% less than 2.5ml/L.
Claims (6)
1. the method that can efficiently remove phosphorus in the coating wastewater is characterized in that being realizing through following step:
(1) adds CaCO in the oxytropism coating wastewater
3, PH is adjusted between the 6.5-8, fully stir the back and in said waste water, add aluminium iron polychloride (PAFC) and a small amount of PAM, the sedimentation and filtration of formation, waste water gets into secondary sedimentation;
(2) add NaOH to the waste water that gets into secondary sedimentation and carry out the PH readjustment,, in secondary wastewater, add CaCl again to PH>=11
2, add PAM again, the after-filtration that reacts completely, discharge of wastewater after fully stirring.
2. a kind of method that can efficiently remove phosphorus in the coating wastewater as claimed in claim 1 is characterized in that the initial temperature of the acid coating wastewater in the said step (1) is controlled between 20-30 ℃.
3. a kind of method that can efficiently remove phosphorus in the coating wastewater as claimed in claim 1 is characterized in that aluminium chloride ferrum (PAFC) concentration in the said step (1) is 5-10%.
4. a kind of method that can efficiently remove phosphorus in the coating wastewater as claimed in claim 1 is characterized in that the PAM concentration in the said step (1) is 1-2%.
5. a kind of method that can efficiently remove phosphorus in the coating wastewater as claimed in claim 1 is characterized in that the addition of all ingredients in the said step (1) is PAFC: PAM: waste water=0.5-2.5 (g): 1-1.5 (g): 1000 (ml).
6. a kind of method that can efficiently remove phosphorus in the coating wastewater as claimed in claim 1 is characterized in that the addition of all ingredients in the said step (2) is CaCl
2: PAM: waste water=10-50 (g): 1-1.5 (g): 1000 (ml).
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CN2011101186733A CN102774977A (en) | 2011-05-09 | 2011-05-09 | Method capable of high efficiency removal of phosphorus in coating waste water |
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CN2011101186733A CN102774977A (en) | 2011-05-09 | 2011-05-09 | Method capable of high efficiency removal of phosphorus in coating waste water |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104291482A (en) * | 2014-09-18 | 2015-01-21 | 中国海洋石油总公司 | Treatment method for wastewater containing high-concentration phosphite |
CN106430704A (en) * | 2016-09-09 | 2017-02-22 | 深圳市绿洲生态科技有限公司 | Movable integrated coating wastewater treatment device and treatment method thereof |
CN109293083A (en) * | 2018-12-13 | 2019-02-01 | 湖南大辰环保科技有限公司 | Acid washing phosphorization wastewater treatment method and system |
CN110526450A (en) * | 2019-09-24 | 2019-12-03 | 瓮福(集团)有限责任公司 | A kind of acid phosphorus fluorine waste water treatment process of the low slag rate of efficient dephosphorization fluorine |
CN111018185A (en) * | 2019-12-21 | 2020-04-17 | 江苏剑桥涂装工程股份有限公司 | Phosphating wastewater treatment method |
CN111747573A (en) * | 2020-07-13 | 2020-10-09 | 苏州苏净环保工程有限公司 | Treatment device and treatment process for coating electrophoresis wastewater |
Citations (3)
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JP2002336870A (en) * | 2001-05-15 | 2002-11-26 | Sanki Eng Co Ltd | Method of recovering and recycling phosphorus and flocculating agent in waste water |
CN1683255A (en) * | 2005-03-08 | 2005-10-19 | 简放陵 | Dephosphorizing technology for waste water treatment of high efficiency, low cost and no pollution |
CN101857340A (en) * | 2010-06-03 | 2010-10-13 | 江西昌河汽车有限责任公司 | Painting wastewater treatment process |
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2011
- 2011-05-09 CN CN2011101186733A patent/CN102774977A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002336870A (en) * | 2001-05-15 | 2002-11-26 | Sanki Eng Co Ltd | Method of recovering and recycling phosphorus and flocculating agent in waste water |
CN1683255A (en) * | 2005-03-08 | 2005-10-19 | 简放陵 | Dephosphorizing technology for waste water treatment of high efficiency, low cost and no pollution |
CN101857340A (en) * | 2010-06-03 | 2010-10-13 | 江西昌河汽车有限责任公司 | Painting wastewater treatment process |
Non-Patent Citations (1)
Title |
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刘绍根等: "两级氯化钙化学沉淀法处理电冰箱、洗衣机生产含磷废水", 《给水排水》 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104291482A (en) * | 2014-09-18 | 2015-01-21 | 中国海洋石油总公司 | Treatment method for wastewater containing high-concentration phosphite |
CN104291482B (en) * | 2014-09-18 | 2015-11-04 | 中国海洋石油总公司 | A kind for the treatment of process containing high density phosphite waste water |
CN106430704A (en) * | 2016-09-09 | 2017-02-22 | 深圳市绿洲生态科技有限公司 | Movable integrated coating wastewater treatment device and treatment method thereof |
CN109293083A (en) * | 2018-12-13 | 2019-02-01 | 湖南大辰环保科技有限公司 | Acid washing phosphorization wastewater treatment method and system |
CN110526450A (en) * | 2019-09-24 | 2019-12-03 | 瓮福(集团)有限责任公司 | A kind of acid phosphorus fluorine waste water treatment process of the low slag rate of efficient dephosphorization fluorine |
CN111018185A (en) * | 2019-12-21 | 2020-04-17 | 江苏剑桥涂装工程股份有限公司 | Phosphating wastewater treatment method |
CN111747573A (en) * | 2020-07-13 | 2020-10-09 | 苏州苏净环保工程有限公司 | Treatment device and treatment process for coating electrophoresis wastewater |
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