CN105347505A - Fluorine-containing heavy-metal-ion-containing waste water processing agent and fluorine-containing heavy-metal-ion-containing waste water processing method - Google Patents
Fluorine-containing heavy-metal-ion-containing waste water processing agent and fluorine-containing heavy-metal-ion-containing waste water processing method Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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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- 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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- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
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- C02F2101/14—Fluorine or fluorine-containing compounds
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- C02F2101/20—Heavy metals or heavy metal compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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Abstract
The invention relates to a fluorine-containing heavy-metal-ion-containing waste water processing agent and a fluorine-containing heavy-metal-ion-containing waste water processing method. The processing agent has a formula as follows: by weight, 8%-79% of one or several selected from iron powder, ferrous sulphate, sodium sulfite and ferrous chloride, 0.1%-6% of sodium borohydride and/or potassium borohydride, 0.2%-1% of biological flocculants, 0.1%-0.8% of non-ionic polyacrylamide, 10%-40% of active carbon, 5%-30% of calcium fluoride, and 5%-30% of calcium chloride. The total nickel content in fluorine-containing heavy-metal-ion-containing waste water after processing in electroplate and printing and dyeing industries can be lowered greatly, heavy metal discharge is reduced, and the total nickel content in fluorine-containing heavy-metal-ion-containing waste water after processing of the provided processing agent is less than 0.006mg/L.
Description
Technical field
the present invention relates to the treatment process of a kind of fluorine-containing heavy metal ion-containing waste water treatment agent and fluorine-containing heavy metal ion-containing waste water.
Background technology
in the production of the enterprises such as electroplating enterprise, aluminium section bar processing, containing a large amount of nickel ions in the electroplating wastewater produced, waste water adopts Physical, absorption method, biological process, chemical method to process usually, total nickel after treatment in waste water can reach the emission standard of national requirements, total nickel≤1.0mg/L.
if application publication number is CN105000651A, Shen Qing Publication day is a kind of compound for treatment of electroplating wastes of 2015-10-28, it is by reductive agent, composite flocculation agent, heavy metal capturing agent DTCR, starch xanthate, cross-linked rectorite, quaternary ammonium salt xylogen, water glass, alkaline matter and adsorption stuffing composition, reductive agent is that 2 ~ 4:1 forms by sodium sulphite and ferrous sulfate in mass ratio, composite flocculation agent is by polyacrylamide, sodium polyacrylate and aluminum chloride are that 1:1:3 ~ 5 form in mass ratio, alkaline matter is made up of for 1:2 ~ 4 in mass ratio sodium hydroxide and calcium hydroxide, adsorption stuffing is diatomite, gac, kaolin, one in flyash or wilkinite, but in the waste water after wherethrough reason, the content of nickel is minimum is 0.15mg/L.
visible, when the Nickel-bearing Waste water yield is larger or in region, emphasis water source, still can discharge relatively large nickel in environment, edatope, fluvial-environment, groundwater environment be caused to the harm of potentiality.
Summary of the invention
technical problem to be solved by this invention is to provide the fluorine-containing heavy metal ion-containing waste water treatment agent of nickel content < 0.006mg/L and the treatment process of fluorine-containing heavy metal ion-containing waste water in the fluorine-containing heavy metal ion-containing waste water after a kind of process.
for solving above technical problem, the present invention takes following technical scheme:
a kind of fluorine-containing heavy metal ion-containing waste water treatment agent, by weight percentage, its composition of raw materials is as follows: one or more in the iron powder of 8% ~ 79%, ferrous sulfate, S-WAT, iron protochloride; The sodium borohydride of 0.1% ~ 6% and/or POTASSIUM BOROHYDRIDE; The biological flocculant of 0.2% ~ 1%; The non-ionic polyacrylamide of 0.1% ~ 0.8%; The gac of 10% ~ 40%; The Calcium Fluoride (Fluorspan) of 5% ~ 30%; The calcium chloride of 5% ~ 30%.
preferably, by weight percentage, its composition of raw materials is as follows: one or more in the iron powder of 30% ~ 60%, ferrous sulfate, S-WAT, iron protochloride; The sodium borohydride of 2% ~ 5% and/or POTASSIUM BOROHYDRIDE; The biological flocculant of 0.2% ~ 1%; The non-ionic polyacrylamide of 0.1% ~ 0.8%; The gac of 10% ~ 30%; The Calcium Fluoride (Fluorspan) of 10% ~ 25%; The calcium chloride of 10% ~ 25%.
preferably, the relative molecular mass > 125 of described biological flocculant.
biological flocculant is that a class is produced by microorganism, can make the solid suspended particle cohesion of not easily degrading in liquid, the special polymer meta-bolites precipitated.
biological flocculant in the present invention is purchased from the microbial flocculant of Luo Nier bio tech ltd, Langfang.
preferably, the molecular weight of described non-ionic polyacrylamide is 6,000,000 ~ 7,000,000.
preferably, the granular size < of described gac 1 μm.
preferably, the granular size < of described Calcium Fluoride (Fluorspan) 1 μm.
preferably, by one or more in described iron powder, ferrous sulfate, S-WAT, iron protochloride, described sodium borohydride and/or POTASSIUM BOROHYDRIDE, described biological flocculant, described non-ionic polyacrylamide, described gac, described Calcium Fluoride (Fluorspan), described calcium chloride carries out being mixed to get described fluorine-containing heavy metal ion-containing waste water treatment agent.
certainly, each component in the present invention also can be packed separately, feeds intake separately or mixed material feeding during use.
a treatment process for fluorine-containing heavy metal ion-containing waste water, described fluorine-containing heavy metal ion-containing waste water is the fluorine-containing waste water containing heavy metal ion that electroplating industry or dyeing produce, and described treatment process comprises the steps:
step (1), described fluorine-containing heavy metal ion-containing waste water treatment agent joined in described fluorine-containing heavy metal ion-containing waste water and reacts;
step (2), the pH of fluorine-containing heavy metal ion-containing waste water after step (1) process is adjusted to 8 ~ 9, then through precipitation, filter and obtain the filtrate after processing.
preferably, the hydrofluoric mass content in described fluorine-containing heavy metal ion-containing waste water is 0.1 ~ 1%, and the content of the heavy metal ion in described fluorine-containing heavy metal ion-containing waste water is 100 ~ 150mg/L.
preferably, in step (1), described temperature of reaction is 10 ~ 80 DEG C, and the reaction times is 2 ~ 20min.
further preferably, in step (1), described temperature of reaction is 10 ~ 40 DEG C, and the reaction times is 5 ~ 10min.
preferably, in step (2), adopt the pH value of the fluorine-containing heavy metal ion-containing waste water described in calcium hydroxide adjustment.
preferably, the embodiment of described treatment process is:
step (1), described fluorine-containing heavy metal ion-containing waste water treatment agent is joined in described fluorine-containing heavy metal ion-containing waste water, stirring reaction 2 ~ 20min at 10 ~ 80 DEG C;
step (2), to through step (1) process after fluorine-containing heavy metal ion-containing waste water in add calcium hydroxide, the pH of described fluorine-containing heavy metal ion-containing waste water is adjusted to 8 ~ 9, stirring reaction 8 ~ 12min, carries out filtration treatment by the precipitation pressure filter of generation, obtains described filtrate.
preferably, in described fluorine-containing heavy metal ion-containing waste water can mass content≤2% of flocculate precipitate time, in step (1), the mass ratio that feeds intake of described fluorine-containing heavy metal ion-containing waste water and described fluorine-containing heavy metal ion-containing waste water treatment agent is 200 ~ 400:1.
preferably, in described fluorine-containing heavy metal ion-containing waste water can the mass content >2% of flocculate precipitate time, the concrete steps of step (1) are: join in described fluorine-containing heavy metal ion-containing waste water by described fluorine-containing heavy metal ion-containing waste water treatment agent, wherein, described fluorine-containing heavy metal ion-containing waste water treatment agent and the mass ratio that feeds intake of described fluorine-containing heavy metal ion-containing waste water are 1:200 ~ 400, and then add flocculation agent, wherein, the mass content of flocculate precipitate often 1% can be increased when described, the charging capacity of described flocculation agent is 0.0002 ~ 0.008% of the quality of described fluorine-containing heavy metal ion-containing waste water.
more preferably, described flocculation agent is biological flocculant and/or non-ionic polyacrylamide.
due to the enforcement of above technical scheme, the present invention compared with prior art tool has the following advantages:
fluorine-containing heavy metal ion-containing waste water treatment agent of the present invention is applicable to the fluorine-containing heavy metal ion-containing waste water in various source, without the need to regulating the pH of fluorine-containing heavy metal ion-containing waste water before feeding intake, can directly dosing, and total nickel content < 0.006mg/L in the fluorine-containing heavy metal ion-containing waste water after process, fluorine-containing heavy metal ion-containing waste water after process not only can reach the requirement (< 0.05mg/L) for total nickel in urban wastewater treatment firm pollutant emission standard (GB18918-2002), even far below in drinking purpose of tap water water quality standard about the standard of total nickel content < 0.02mg/L.Therefore, the present invention can reduce total nickel content in the plating after process, the fluorine-containing heavy metal ion-containing waste water of dyeing greatly, reduces heavy metals emission, relative to traditional technique, has obvious economic benefit and environmental benefit.
Embodiment
method of the present invention is passed through the nickel-containing waste water from electroplating production device first by adding fluorine-containing heavy metal ion-containing waste water treatment agent of the present invention by the Ni in fluorine-containing heavy metal ion-containing waste water
3+
be reduced to Ni
2+
, then adjust the pH value of fluorine-containing heavy metal ion-containing waste water by Ni with calcium hydroxide
2+
be converted to precipitation, more after filtration, obtain the filtrate of total nickel content < 0.006mg/L.In the present invention, the detection of ion content adopts inductively coupled plasma chromatographic instrument.
below in conjunction with specific embodiment, the present invention will be further described in detail, but the present invention is not limited to following examples.
embodiment 1
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron powder of 50%, the sodium borohydride of 5%, 0.5% biological flocculant, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.3% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, total nickel content <0.006mg/L, content of fluoride ion 5.63mg/L in filtrate.
embodiment 2
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the ferrous sulfate of 50%, the POTASSIUM BOROHYDRIDE of 5%, 0.5% biological flocculant, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.0% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.57g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, total nickel content <0.006mg/L, content of fluoride ion 6.25mg/L in filtrate.
embodiment 3
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the S-WAT of 30%, the POTASSIUM BOROHYDRIDE of 5%, 0.5% biological flocculant, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 25%, the calcium chloride of 25% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.9% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.57g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.5, stir 10min;
(3) then use Filter Press process, obtain filtrate, total nickel content <0.006mg/L, content of fluoride ion 7.83mg/L in filtrate.
embodiment 4
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron protochloride of 60%, the sodium borohydride of 2%, 0.2% biological flocculant, the non-ionic polyacrylamide of 0.1%, gac, the Calcium Fluoride (Fluorspan) of 10%, the calcium chloride of 17.7% of 10%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.7% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.57g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 9, stir 10min;
(3) then use Filter Press process, obtain filtrate, total nickel content <0.006mg/L, content of fluoride ion 9.05mg/L in filtrate.
embodiment 5
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron powder of 50%, the sodium borohydride of 5%, 0.5% biological flocculant, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 3% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, 0.0009g biological flocculant and 0.0009g non-ionic polyacrylamide, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, total nickel content <0.006mg/L, content of fluoride ion 8.96mg/L in filtrate.
comparative example 1
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the ferrous sulfate of 55%, the biological flocculant of 0.5%, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.5% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, in filtrate, total nickel content is 0.95mg/L, content of fluoride ion 8.29mg/L.
comparative example 2
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the sodium borohydride of 55%, the biological flocculant of 0.5%, the non-ionic polyacrylamide of 0.5%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.6% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, in filtrate, total nickel content is 0.89mg/L, content of fluoride ion 9.54mg/L.
comparative example 3
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron powder of 50%, the sodium borohydride of 5%, the biological flocculant of 1%, gac, the Calcium Fluoride (Fluorspan) of 15%, the calcium chloride of 15% of 14%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.9% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, in filtrate, total nickel content is 0.92mg/L, content of fluoride ion 7.68mg/L.
comparative example 4
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron powder of 50%, the sodium borohydride of 5%, the biological flocculant of 0.5%, non-ionic polyacrylamide, the gac of 29%, the calcium chloride of 15% of 0.5%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 2.0% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, in filtrate, total nickel content is 0.83mg/L, content of fluoride ion 8.34mg/L.
comparative example 5
a kind of composition of raw materials and weight percent of fluorine-containing heavy metal ion-containing waste water treatment agent are: the iron powder of 50%, the sodium borohydride of 5%, the biological flocculant of 0.5%, non-ionic polyacrylamide, the Calcium Fluoride (Fluorspan) of 24%, the calcium chloride of 20% of 0.5%.
this fluorine-containing heavy metal ion-containing waste water is from the waste water of electroplating production device, the weight of fluorine-containing heavy metal ion-containing waste water is 205g, total nickel 100.25mg/L in fluorine-containing heavy metal ion-containing waste water, hydrogen fluoride mass content 1.0%, can the mass content 1.0% of flocculate precipitate, concrete minimizing technology comprises the following steps:
(1) in fluorine-containing heavy metal ion-containing waste water, add the fluorine-containing heavy metal ion-containing waste water treatment agent of 0.90g, stirring reaction 5min, temperature of reaction is 30 DEG C;
(2) in the fluorine-containing heavy metal ion-containing waste water after step (1) process, add calcium hydroxide, the pH value of fluorine-containing heavy metal ion-containing waste water is adjusted to 8.2, stir 10min;
(3) then use Filter Press process, obtain filtrate, in filtrate, total nickel content is 0.99mg/L, content of fluoride ion 7.62mg/L.
above to invention has been detailed description; its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; the equivalence change that all spirit according to the present invention are done or modification, all should be encompassed in protection scope of the present invention.
Claims (10)
1. a fluorine-containing heavy metal ion-containing waste water treatment agent, is characterized in that: by weight percentage, and its composition of raw materials is as follows: one or more in the iron powder of 8% ~ 79%, ferrous sulfate, S-WAT, iron protochloride; The sodium borohydride of 0.1% ~ 6% and/or POTASSIUM BOROHYDRIDE; The biological flocculant of 0.2% ~ 1%; The non-ionic polyacrylamide of 0.1% ~ 0.8%; The gac of 10% ~ 40%; The Calcium Fluoride (Fluorspan) of 5% ~ 30%; The calcium chloride of 5% ~ 30%.
2. fluorine-containing heavy metal ion-containing waste water treatment agent according to claim 1, is characterized in that: the relative molecular mass > 125 of described biological flocculant, the molecular weight of described non-ionic polyacrylamide is 6,000,000 ~ 7,000,000.
3. fluorine-containing heavy metal ion-containing waste water treatment agent according to claim 1, is characterized in that: the granular size < of described gac 1 μm, the granular size < of described Calcium Fluoride (Fluorspan) 1 μm.
4. fluorine-containing heavy metal ion-containing waste water treatment agent according to claim 1, it is characterized in that: by one or more in described iron powder, ferrous sulfate, S-WAT, iron protochloride, described sodium borohydride and/or POTASSIUM BOROHYDRIDE, described biological flocculant, described non-ionic polyacrylamide, described gac, described Calcium Fluoride (Fluorspan), described calcium chloride carries out being mixed to get described fluorine-containing heavy metal ion-containing waste water treatment agent.
5. a treatment process for fluorine-containing heavy metal ion-containing waste water, described fluorine-containing heavy metal ion-containing waste water is the fluorine-containing waste water containing heavy metal ion that electroplating industry or dyeing produce, and it is characterized in that: described treatment process comprises the steps:
Step (1), the fluorine-containing heavy metal ion-containing waste water treatment agent according to any one of Claims 1-4 joined in described fluorine-containing heavy metal ion-containing waste water and reacts;
Step (2), the pH of fluorine-containing heavy metal ion-containing waste water after step (1) process is adjusted to 8 ~ 9, then through precipitation, filter and obtain the filtrate after processing.
6. the treatment process of fluorine-containing heavy metal ion-containing waste water according to claim 5, it is characterized in that: the hydrofluoric mass content in described fluorine-containing heavy metal ion-containing waste water is 0.1 ~ 1%, the content of the heavy metal ion in described fluorine-containing heavy metal ion-containing waste water is 100 ~ 150mg/L.
7. the treatment process of fluorine-containing heavy metal ion-containing waste water according to claim 5, is characterized in that: in step (1), and described temperature of reaction is 10 ~ 80 DEG C, and the reaction times is 2 ~ 20min.
8. the treatment process of fluorine-containing heavy metal ion-containing waste water according to claim 5, is characterized in that: in step (2), adopts the pH value of the fluorine-containing heavy metal ion-containing waste water described in calcium hydroxide adjustment.
9. the treatment process of fluorine-containing heavy metal ion-containing waste water according to claim 5, it is characterized in that: in described fluorine-containing heavy metal ion-containing waste water can mass content≤2% of flocculate precipitate time, in step (1), the mass ratio that feeds intake of described fluorine-containing heavy metal ion-containing waste water and described fluorine-containing heavy metal ion-containing waste water treatment agent is 200 ~ 400:1.
10. the treatment process of fluorine-containing heavy metal ion-containing waste water according to claim 5, it is characterized in that: in described fluorine-containing heavy metal ion-containing waste water can the mass content >2% of flocculate precipitate time, the concrete steps of step (1) are: join in described fluorine-containing heavy metal ion-containing waste water by described fluorine-containing heavy metal ion-containing waste water treatment agent, wherein, described fluorine-containing heavy metal ion-containing waste water treatment agent and the mass ratio that feeds intake of described fluorine-containing heavy metal ion-containing waste water are 1:200 ~ 400, and then add flocculation agent, wherein, the mass content of flocculate precipitate often 1% can be increased when described, the charging capacity of described flocculation agent is 0.0002 ~ 0.008% of the quality of described fluorine-containing heavy metal ion-containing waste water.
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