CN105967385A - Industrial plating wastewater treatment process - Google Patents
Industrial plating wastewater treatment process Download PDFInfo
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- CN105967385A CN105967385A CN201610357636.0A CN201610357636A CN105967385A CN 105967385 A CN105967385 A CN 105967385A CN 201610357636 A CN201610357636 A CN 201610357636A CN 105967385 A CN105967385 A CN 105967385A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention provides an industrial plating wastewater treatment process. The process sequentially comprises the following operating steps that the PH value of plating wastewater is adjusted to be 3 to 4; 1-20 g/L of hydrogen peroxide, 2-20 g/L of sodium metabisulphite and 0.1-10 g/L of bactericidin are added to the wastewater, stirring is conducted for 20 min to 30 min, and precipitation is conducted. According to the industrial plating wastewater treatment process, the treated plating water can be discharged up to standard, complexes can be completely decomposed, harmful impurities can be removed, and operation is easy.
Description
Technical field
The present invention relates to the technical field of waste water control, specifically, relate to a kind of industry plating wastewater and process technique.
Background technology
Electroplating wastewater is the various waste water discharged in plating production process, and mainly there are plating piece rinse water, spent plating bath, other waste water etc. in its source, often contains Cr6+, the heavy metal ion such as Cu2+, Ni2+, Zn2+, Fe2+, and the material containing severe toxicity such as cyanides.Heavy metal ion in waste water with the presence of with simple cation form, with the presence of with acid radical anion form.How poisonous electroplating wastewater is, endangers bigger.As cyanogen can cause people and animals' acute poisoning, lethal, low concentration long term also can cause chronic poisoning.Cadmium can make kidney generation pathological changes.Cr VI can cause pulmonary carcinoma, intestinal tract disease and anemia, and can be in bone, the dirty interior accumulation of spleen and liver.Therefore, electroplating wastewater must strictly control, and deals carefully with.
The process technique of electroplating wastewater has a lot, such as chemical method, evaporation concentration method, electrolysis, ion exchange, absorption method and membrane separation process.In terms of the domestic and international electroplating waste water treatment technology of recent decades, electroplating wastewater has 99% employing chemical Treatment, chemical Treatment waste water, it it is current most widely used treatment technology, technology is the most ripe, and chemical method includes the sedimentation method, oxidation-reduction method, ferrum oxidizing process etc., being a kind of traditional and widely used process electroplating wastewater method, have small investment, processing cost is low, the feature such as simple to operate, it is adaptable to all kinds of plated metal waste water process.
But along with the raising of discharge standard, traditional electroplating waste processing process is extremely difficult to effluent-disposal standard.Electroplating wastewater is all mixed with different complex, if only leaning on single chemicals treatment is to be decomposed completely by all of complex.Complex is not in the case of being reduced, the most useless with medicaments many again, it is impossible to remove poisonous and harmful substance by precipitation, can only be diluted discharge with substantial amounts of clear water, thus cause the waste of water resource.Using and precipitate, filter, adsorb and technique that the various ways such as membrane separation process processes, existence investment in various degree is big, operating cost is high, and the water after process is difficult to up to standard.
Summary of the invention
In order to overcome above-mentioned technical problem, the invention provides industry plating wastewater a kind of and processed technique, low cost, simple to operate, high treating effect.
To achieve these goals, industry plating wastewater of the present invention processes technique, and the concrete operating procedure processed is as follows:
1) first the pH value of pending electroplating wastewater is adjusted to 3-4；
2) in the electroplating wastewater after regulation PH, add the hydrogen peroxide of 1-20g/L, the sodium pyrosulfite of 2-20g/L and the bacteriocidin of 0.1-10g/L again, stir, staticly settle；
3) pH value of the electroplating wastewater after then processing regulates to 9-10, then through precipitation process；
4) toward step 3) process after electroplating wastewater in add the sodium hypochlorite of 1-20g/L, stir；
5) then add the aluminium polychlorid of 0.1-10g/L and the polypropylene milling amine of 0.1-10g/L to step 4) in electroplating wastewater in, after stirring, and staticly settle；
6) through step 5) process after electroplating wastewater in add the bacteriocidin of the sodium pyrosulfite of 0.1-20g/L, 0.1-10g/L, stir, staticly settle；
7) by step 6) electroplating wastewater that processes regulates pH value again to 9-10；
8) in step 7) electroplating wastewater that processes adds the hydrogen peroxide of the ferrous sulfate of 1-20g/L, 1-20g/L, stir, then through step 4), step 5) process.
Preferably, described step 1) in, electroplating wastewater adds the iron sulfate of 0.1-10g/L and the ferric chloride of 0.1-10g/L, stirs so that the pH value of electroplating wastewater reaches 3-4.
Preferably, step 3) in regulation method used by electroplating wastewater pH value for adding sheet alkali 1-20g/L and quick lime 1-30g/L, stir.
Preferably, step 7) in regulation method used by electroplating wastewater pH value for adding sheet alkali 1-20g/L and quick lime 1-30g/L, stir.
Preferably, step 2) in reaction time be 20 30 minutes.
Preferably, step 3) time of reacting is 10-30 minute.
Preferably, step 4) time of reacting is 10-30 minute.
Preferably, step 6) time of reacting is 10-15 minute.
Preferably, step 2) in add hydrogen peroxide be 10-15g/L.
The invention has the beneficial effects as follows:
1. the present invention uses the sodium hypochlorite of repetition to reduce, and can fully be separated by cyano complex, it is possible to make the plating water qualified discharge processed.
2. the present invention can crack the complex in water body, can remove poisonous and harmful substance by precipitation so that the electroplating wastewater of discharge reaches following effect: cyanide≤0.1mg/L；Cr VI≤0.1mg/L；Nickel≤0.1mg/L；Copper≤0.2mg/L；COD concentration is about 100.
Detailed description of the invention
Embodiments of the invention addressed below.The element described in one embodiment of the invention and feature can combine with the element shown in one or more other embodiments and feature.It should be noted that, for purposes of clarity, explanation eliminates unrelated to the invention, parts known to persons of ordinary skill in the art or the expression of process and description.
Embodiment 1
Power taking waste electroplating 1 liter, through recording, the heavy metal copper contained in 1 liter of electroplating wastewater is 5g, nickel is 8g, Cr VI is 10g, and containing extremely toxic substance 25g such as cyanides, pH value is 6；
1) first in electroplating wastewater pending for 1L, add the iron sulfate of 0.1g and the ferric chloride of 0.1g, the pH value of electroplating wastewater is adjusted to 3；
2) in the electroplating wastewater after regulation PH, the hydrogen peroxide of 1g, the sodium pyrosulfite of 2g and the bacteriocidin of 0.1g/ are added again, stir, by reaction reduction and the complex of hydrogen bonded, under the effect by the Adsorption of Heavy Metals of bacteriocidin, staticly settle 20 minutes；
3) electroplating wastewater the most after treatment adds sheet alkali (also referred to as sodium hydroxide, caustic alkali, Caustic soda, caustic soda) and the quick lime of 1g of 1g, pH value is made to regulate to 9, again through precipitation process 20 minutes, allow the heavy metal ion in waste water generate hydroxide by alkalescence condition and precipitate；
4) toward step 3) process after electroplating wastewater in add the sodium hypochlorite of 1g, stir, staticly settling 20 minutes, cyanide can be reduced into, by sodium hypochlorite, the cyanate that toxicity is the most weak in the basic conditions, further generates carbon dioxide, ammonia and nitrogen.
5) then add the aluminium polychlorid of 0.1g and the polypropylene milling amine of 0.1g to step 4) in electroplating wastewater in, after stirring, and flocculation sediment；
6) through step 5) process after electroplating wastewater in add the bacteriocidin of the sodium pyrosulfite of 0.1g, 0.1g, stirring, the heavy metal ion that there is also in electroplating wastewater is reduced again, again staticly settle under by the adsorption of bacteriocidin 10 minutes；
7) toward step 6) quick lime of the sheet alkali and 1g that add 1g in the electroplating wastewater that processes regulates PH value again to 9；
8) in step 7) electroplating wastewater that processes adds the hydrogen peroxide of the ferrous sulfate of 1g, 1g, stir, then through step 4), step 5) process.
Embodiment 2
Power taking waste electroplating 1 liter, through recording, the heavy metal copper contained in 1 liter of electroplating wastewater is 6g, nickel is 13g, Cr VI is 13g, and containing extremely toxic substance 30g such as cyanides, pH value is 8；
1) first in electroplating wastewater pending for 1L, add the iron sulfate of 10g and the ferric chloride of 10g, the pH value of electroplating wastewater is adjusted to 4；
2) in the electroplating wastewater after regulation PH, the hydrogen peroxide of 20g, the sodium pyrosulfite of 20g and the bacteriocidin of 10g are added again, stir, by reaction reduction and the complex of hydrogen bonded, under the effect by the Adsorption of Heavy Metals of bacteriocidin, staticly settle 30 minutes；
3) electroplating wastewater the most after treatment adds sheet alkali and the quick lime of 30g of 20g, makes pH value regulate to 10, then through precipitation process 20 minutes, allow the heavy metal ion in waste water generate hydroxide by alkalescence condition and precipitate；
4) toward step 3) process after electroplating wastewater in add the sodium hypochlorite of 20g, stir, staticly settling 20 minutes, cyanide can be reduced into, by sodium hypochlorite, the cyanate that toxicity is the most weak in the basic conditions, further generates carbon dioxide, ammonia and nitrogen.
5) then add the aluminium polychlorid of 10g and the polypropylene milling amine of 10g to step 4) in electroplating wastewater in, after stirring, and flocculation sediment；
6) through step 5) process after electroplating wastewater in add the bacteriocidin of the sodium pyrosulfite of 20g, 10g, stirring, the heavy metal ion that there is also in electroplating wastewater is reduced again, again staticly settle under by the adsorption of bacteriocidin 15 minutes；
7) toward step 6) quick lime of the sheet alkali and 30g that add 20g in the electroplating wastewater that processes regulates pH value again to 10；
8) in step 7) electroplating wastewater that processes adds the hydrogen peroxide of the ferrous sulfate of 20g, 20g, stir, then through step 4), step 5) process.
Embodiment 3
Power taking waste electroplating 1 liter, through recording, the heavy metal copper contained in 1 liter of electroplating wastewater is 13g, nickel is 16g, Cr VI is 20g, and containing extremely toxic substance 40g such as cyanides, pH value is 10；
1) first in electroplating wastewater pending for 1L, add the iron sulfate of 5g and the ferric chloride of 5g, the pH value of electroplating wastewater is adjusted to 3；
2) in the electroplating wastewater after regulation PH, the hydrogen peroxide of 10g, the sodium pyrosulfite of 10g and the bacteriocidin of 5g are added again, stir, by reaction reduction and the complex of hydrogen bonded, under the effect by the Adsorption of Heavy Metals of bacteriocidin, staticly settle 25 minutes；
3) electroplating wastewater the most after treatment adds sheet alkali and the quick lime of 15g of 10g, makes pH value regulate to 10, then through precipitation process 20 minutes, allow the heavy metal ion in waste water generate hydroxide by alkalescence condition and precipitate；
4) toward step 3) process after electroplating wastewater in add the sodium hypochlorite of 10g, stir, staticly settling 20 minutes, cyanide can be reduced into, by sodium hypochlorite, the cyanate that toxicity is the most weak in the basic conditions, further generates carbon dioxide, ammonia and nitrogen.
5) then add the aluminium polychlorid of 5g and the polypropylene milling amine of 5g to step 4) in electroplating wastewater in, after stirring, and flocculation sediment；
6) through step 5) process after electroplating wastewater in add the bacteriocidin of the sodium pyrosulfite of 10g, 5g, stirring, the heavy metal ion that there is also in electroplating wastewater is reduced again, again staticly settles under by the adsorption of bacteriocidin 15 minutes；
7) toward step 6) quick lime of the sheet alkali and 15g that add 10g in the electroplating wastewater that processes regulates pH value again to 10；
8) in step 7) electroplating wastewater that processes adds the hydrogen peroxide of the ferrous sulfate of 10g, 10g, stir, then through step 4), step 5) process.
Although the present invention of being described in detail and advantage thereof it should be appreciated that without departing from by appendedClaimVarious change can be carried out in the case of the spirit and scope of the present invention limited, substitute and convert.And, scope of the present application is not limited only to the specific embodiment of the process described by description, equipment, means, method and steps.One of ordinary skilled in the art will readily appreciate that from the disclosure, can use according to the present invention and performs the function essentially identical to corresponding embodiment described herein or obtain process, equipment, means, method or the step result essentially identical with it, existing and the most to be developed.Therefore, appendedClaimIt is directed in the range of them including such process, equipment, means, method or step.
Claims (9)
1. an industry plating wastewater processes technique, it is characterised in that use following operating procedure successively:
1) first the pH value of pending electroplating wastewater is adjusted to 3-4；
2) in the electroplating wastewater after regulation PH, the burnt sulfurous of the hydrogen peroxide of 1-20g/L, 2-20g/L is added again
Acid sodium and the bacteriocidin of 0.1-10g/L, stir, staticly settle；
3) pH value of the electroplating wastewater after then processing regulates to 9-10, then through precipitation process；
4) toward step 3) process after electroplating wastewater in add the sodium hypochlorite of 1-20g/L, stir；
5) aluminium polychlorid of 0.1-10g/L and the polypropylene milling amine of 0.1-10g/L are then added to step 4)
In electroplating wastewater in, after stirring, and staticly settle；
6) through step 5) process after electroplating wastewater in add the sodium pyrosulfite of 0.1-20g/L, 0.1-10g/L
Bacteriocidin, stir, staticly settle；
7) by step 6) electroplating wastewater that processes regulates pH value again to 9-10；
8) in step 7) electroplating wastewater that processes adds the dioxygen of the ferrous sulfate of 1-20g/L, 1-20g/L
Water, stirs, then through step 4), step 5) process.
A kind of electroplating waste processing process the most according to claim 1, it is characterised in that: described step
1) in, adding the iron sulfate of 0.1-10g/L and the ferric chloride of 0.1-10g/L in electroplating wastewater, stirring is all
Even so that the pH value of electroplating wastewater reaches 3-4.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
3) in, regulation method used by electroplating wastewater pH value is for adding sheet alkali 1-20g/L and quick lime 1-30g/L, stirs
Mix uniformly.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
7) in, regulation method used by electroplating wastewater pH value is for adding sheet alkali 1-20g/L and quick lime 1-30g/L, stirring
Uniformly.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
2) in, the time of reaction is 20 30 minutes.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
3) time reacted is 10-30 minute.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
4) time reacted is 10-30 minute.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
6) time reacted is 10-15 minute.
A kind of industry plating wastewater the most according to claim 1 processes technique, it is characterised in that: step
2) hydrogen peroxide added in is 10-15g/L.
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| CN201610357636.0A CN105967385A (en) | 2016-05-26 | 2016-05-26 | Industrial plating wastewater treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550776A (en) * | 2019-09-05 | 2019-12-10 | 镇江市和云工业废水处置有限公司 | Fenton oxidation-reduction integrated method for treating chromium-containing wastewater |
| CN111170530A (en) * | 2018-11-13 | 2020-05-19 | 上海朗蔚环保科技有限公司 | Electroplating wastewater treatment system |
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| CN102010102A (en) * | 2010-11-08 | 2011-04-13 | 兰溪市卓越电子有限公司 | Method for treating electroplating wastewater |
| CN104045182A (en) * | 2014-06-09 | 2014-09-17 | 浙江菲尔特过滤科技有限公司 | Treatment method for electroplating industrial wastewater |
| CN105000711A (en) * | 2015-07-14 | 2015-10-28 | 深圳市绿沁环保科技有限公司 | Nickel-containing combined electroplating wastewater treatment device and method |
| CN105461117A (en) * | 2016-01-05 | 2016-04-06 | 悦斯莱特灯饰照明（河源）有限公司 | Recovery and comprehensive utilization process for electroplating wastewater |
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2016
- 2016-05-26 CN CN201610357636.0A patent/CN105967385A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010102A (en) * | 2010-11-08 | 2011-04-13 | 兰溪市卓越电子有限公司 | Method for treating electroplating wastewater |
| CN104045182A (en) * | 2014-06-09 | 2014-09-17 | 浙江菲尔特过滤科技有限公司 | Treatment method for electroplating industrial wastewater |
| CN105000711A (en) * | 2015-07-14 | 2015-10-28 | 深圳市绿沁环保科技有限公司 | Nickel-containing combined electroplating wastewater treatment device and method |
| CN105461117A (en) * | 2016-01-05 | 2016-04-06 | 悦斯莱特灯饰照明（河源）有限公司 | Recovery and comprehensive utilization process for electroplating wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111170530A (en) * | 2018-11-13 | 2020-05-19 | 上海朗蔚环保科技有限公司 | Electroplating wastewater treatment system |
| CN110550776A (en) * | 2019-09-05 | 2019-12-10 | 镇江市和云工业废水处置有限公司 | Fenton oxidation-reduction integrated method for treating chromium-containing wastewater |
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