Method for treating waste water containing complex copper
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A treatment method, copper complexing technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effect of less consumption, high copper removal rate, and simple operation
Inactive Publication Date: 2014-01-01
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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[0003] In view of the above defects, the present invention provides a low-cost, less dosage, which can treat various forms of copper and complexed copper in water, simple operation, no secondary pollution, no toxic gas generation, and high copper removal rate. The processing method of complexed copper-containing waste water, to solve many deficiencies of existing waste water treatment technology
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Embodiment 1
[0016] The processing method containing complexed copper wastewater described in the embodiments of the present invention mainly consists of the following steps:
[0017] (1) Add hydrochloric acid to adjust the pH of the wastewater to 3.0-4.0;
[0018] (2) Then add 80ppm sodium hypochlorite and stir for 2-5 minutes;
[0019] (3) Then, add sodium hydroxide to adjust the pH of the wastewater to 10.5-11.5;
[0020] (4) Continue to add 100ppm of PAC and stir for 2-5 minutes;
[0021] (5) Then add 40ppm trisodium thiocyanate and stir for 2-5 minutes;
[0022] ⑹Finally, add 2.5ppm of anion and stir for 10-20 minutes, precipitate for 10-20 minutes, filter, and measure the copper content in the filtered water.
Embodiment 2
[0024] It mainly consists of the following steps:
[0025] (1) Add hydrochloric acid to adjust the pH of the wastewater to 3.0-4.0;
[0026] (2) Then add 80ppm sodium hypochlorite and stir for 2-5 minutes;
[0027] (3) Then, add sodium hydroxide to adjust the pH of the wastewater to 10.5-11.5;
[0028] (4) Continue to add 100ppm of PAC and stir for 2-5 minutes;
[0029] (5) Then add 80ppm trisodium thiocyanate and stir for 2-5 minutes;
[0030] ⑹Finally, add 5ppm of anion and stir for 10-20 minutes, precipitate for 10-20 minutes, filter, and measure the copper content in the filtered water.
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Abstract
The invention relates to a method for treating waste water containing complex copper. The method comprises the following steps: adding hydrochloric acid to adjust the pH value of the waste water to 3.0-4.0; adding 20-200 ppm of sodium hypochlorite and stirring for 2-5 minutes; then, adding sodium hydroxide to adjust the pH value of the waste water to 10.5-11.5; further, adding 50-500 ppm of PAC (Poly Aluminum Chloride) and stirring for 2-5 minutes; then, adding 10-100 ppm of trithiocyanuric acid trisodium salt and stirring for 2-5 minutes; finally, adding 0.5-5 ppm of negative ions, stirring for 10-20 minutes, precipitating for 10-20 minutes, filtering, and measuring the copper content of the filtered water. The invention has the benefits that the method is low in cost and small in consumption, can be used for treating copper of different forms and copper in the complex state in water, is simple to operate, has no secondary pollution, and generates no poisonous gas; the copper removal rate reaches 99.4%.
Description
technical field [0001] The invention relates to waste water treatment technology, in particular to a treatment method for complex copper-containing waste water. Background technique [0002] With the development of modern industry, processes such as printed circuit boards, electroplating, tanning, and chemical manufacturing will produce a large amount of copper-containing wastewater. If not properly treated, it will pollute the environment and endanger human health. The traditional copper-containing wastewater treatment process will produce a large amount of difficult-to-treat copper-containing precipitated sludge, which is easy to form secondary pollution. The copper-containing wastewater is extremely harmful to animals, plants and humans. If the copper-containing wastewater is used to irrigate farmland, copper ions will Fixed in the roots of plants, affecting nutrient absorption and seriously affecting the growth of crops; after copper-containing wastewater enters the wate...
Claims
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Application Information
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