CN101624242A - Cadmium-containing waste water sulfur-free treatment process - Google Patents
Cadmium-containing waste water sulfur-free treatment process Download PDFInfo
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- CN101624242A CN101624242A CN200910043158A CN200910043158A CN101624242A CN 101624242 A CN101624242 A CN 101624242A CN 200910043158 A CN200910043158 A CN 200910043158A CN 200910043158 A CN200910043158 A CN 200910043158A CN 101624242 A CN101624242 A CN 101624242A
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- cadmium
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- containing waste
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Abstract
The invention relates to a cadmium-containing waste water sulfur-free treatment process which comprises: the pH value of cadmium-containing waste water is adjusted to be 8.5, non-sulfur reactant is added into the cadmium-containing waste water, the mixed solution is filtered and precipitated by flocculation, precise millipore filtration is carried out, and the product is recycled and utilized. Excess phosphate radical ion is selected as reactant, and the effect is better than that of sulphion; the phosphate radical ion is firstly fully dissolved before being added, is heated to 30-40 DEG C and then added into the cadmium-containing waste water. On the other hand, the water treatment technique needed by the production process is matched in a selective way, and the production technique is correspondingly improved; the waste water is reused, so that the discharge quantity of the treated waste water is greatly reduced, and the aims of energy conservation and emission reduction can be achieved. The discharged cadmium-containing waste water processed by the sulfur-free treatment process stably reaches the standard, the cadmium content can be controlled below 0.05ppm, other polluting substances are not introduced, and the recycling rate of the waste water reaches 50%.
Description
Technical field
The present invention relates to a kind of cadmium-containing waste water sulfur-free treatment process.
Background technology
Characteristics and irreplaceability thereof that cadmium pigment rarely has because of its color are a kind of indispensable pigment in the mineral dye field.But cadmium pigment has inevitably produced cadmium wastewater in process of production, and the cadmium wastewater qualified discharge is an industry difficult problem always.Traditional cadmium wastewater adopts Gas with Sodium Sulfide Solution to cook reagent and handles, and technology is single, and there are the following problems: the phenomenon that the cadmium discharging exceeds standard often takes place, and is extremely unstable; Waste water sulphur content after the processing exceeds standard obviously; Waste water in the waster water process process only is confined to the treatment process process, the wastewater treatment overload.Therefore, how to make cadmium content stablize the lasting discharging standards that reaches, and avoid sulfur-containing waste water to produce, reach the target of energy-saving and emission-reduction, become the key issue that cadmium wastewater is handled.
Summary of the invention
The technical problem to be solved in the present invention is, for making the processing stably reaching standard of cadmium wastewater, do not have that material that other new introducings have contaminative produces and process modification after reach energy-saving and emission-reduction, now adopt phosphorous chemicals to cook reagent, to reach above-mentioned requirements.
Solution of the present invention is, negatively charged ion and heavy metal cation bonded solubility product by nonstaining property are measured, select a kind ofly not cook reagent with contaminative and than the easier negatively charged ion that forms the solid phase precipitation thing with cadmium ion of sulphur, condition element optimization by material is generated simultaneously, actual condition is produced in the selector symphysis, be introduced in the cadmium wastewater and handle, its treatment process is as follows:
Cadmium wastewater-adjusting PH=8.5-adds non-reaction of Salmon-Saxl agent-filtration-flocculation sediment-precise microfiltration-recycling.
The present invention adopts excessive phosphate anion to cook reagent, add at it fashionable, fully dissolving earlier, be heated to 30-40 ℃ again row be added in the cadmium wastewater.
The invention has the beneficial effects as follows that adopt excessive phosphate anion to cook reagent, its effect is better than traditional employing sulfonium ion, is mainly reflected in: (1), because of cadmium phosphate K
SP=3 * 10
-33Cadmium Sulfide K
SP=8 * 10
-27, solubility product has lacked 10 than what sulphur was introduced
6Grade, more help the reduction of cadmium ion in the solution; (2), do not introduce other contaminative ion.Can measure soluble salt and concentration thereof to the waste water in the waste water treatment process process on the other hand, cooperate with water technology selectivity required in the production process production technique is carried out corresponding improvement, again utilize waste water, reduce the discharge capacity of handling waste water greatly, reached the purpose of energy-saving and emission-reduction.This technology can make the cadmium wastewater stably reaching standard under limited Infrastructure, it can be controlled at cadmium content in 0.05ppm, and does not have sulfur-bearing etc. and have pollutant and introduce.
Embodiment
According to above-described cadmium-containing waste water sulfur-free treatment process, cadmium wastewater is implemented processing finishes by following processing step:
1, regulates PH=8.5; The pH value of cadmium wastewater is adjusted to 8.5.
2, add non-reaction of Salmon-Saxl agent; Adopt excessive phosphate anion to cook reagent, add at it fashionable, fully dissolving earlier, be heated to 30-40 ℃ again row be added in the cadmium wastewater.
3, filter.
4, flocculation sediment.
5, precise microfiltration.
Through the cadmium wastewater discharging stably reaching standard of above processing, more can control cadmium content below 0.05ppm, not having other has pollutant to introduce, and the cycling utilization of wastewater rate can reach 50%.
Claims (2)
1, a kind of cadmium-containing waste water sulfur-free treatment process is characterized in that its treatment process is as follows:
Cadmium wastewater-adjusting PH=8.5-adds non-reaction of Salmon-Saxl agent-filtration-flocculation sediment-precise microfiltration-recycling.
2, cadmium-containing waste water sulfur-free treatment process according to claim 1 is characterized in that adopting excessive phosphate anion to cook reagent, add at it fashionable, fully dissolving earlier, be heated to 30-40 ℃ again row be added in the cadmium wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910043158A CN101624242A (en) | 2009-04-17 | 2009-04-17 | Cadmium-containing waste water sulfur-free treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910043158A CN101624242A (en) | 2009-04-17 | 2009-04-17 | Cadmium-containing waste water sulfur-free treatment process |
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| Publication Number | Publication Date |
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| CN101624242A true CN101624242A (en) | 2010-01-13 |
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Family Applications (1)
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| CN200910043158A Pending CN101624242A (en) | 2009-04-17 | 2009-04-17 | Cadmium-containing waste water sulfur-free treatment process |
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| CN (1) | CN101624242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478129A (en) * | 2014-12-04 | 2015-04-01 | 江西理工大学 | Method for removing trace amounts of cadmium in aqueous solution |
| CN104496073A (en) * | 2014-12-04 | 2015-04-08 | 江西理工大学 | Method for processing Cd-containing heavy metal wastewater |
| CN108862704A (en) * | 2018-06-22 | 2018-11-23 | 成都中建材光电材料有限公司 | A kind of processing system and application method of cadmium wastewater |
-
2009
- 2009-04-17 CN CN200910043158A patent/CN101624242A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478129A (en) * | 2014-12-04 | 2015-04-01 | 江西理工大学 | Method for removing trace amounts of cadmium in aqueous solution |
| CN104496073A (en) * | 2014-12-04 | 2015-04-08 | 江西理工大学 | Method for processing Cd-containing heavy metal wastewater |
| CN108862704A (en) * | 2018-06-22 | 2018-11-23 | 成都中建材光电材料有限公司 | A kind of processing system and application method of cadmium wastewater |
| CN108862704B (en) * | 2018-06-22 | 2020-11-10 | 成都中建材光电材料有限公司 | Treatment system for cadmium-containing wastewater and use method |
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Open date: 20100113 |