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[China Aluminum Industry Network] Wastewater treatment commonly used methods are: acid, alkali wastewater mutual neutralization, in the case of less than neutral conditions, the use of neutralizing agent.
Alkaline neutralizer can use lime, dolomite, sodium hydroxide, sodium carbonate and the like. Use alkaline waste liquid, such as waste sodium hydroxide solution, waste treatment, comprehensive utilization. Industrial sodium hydroxide has a uniform composition, is easy to store and feed, and has a rapid response, but it is expensive. Lime has a wide range of sources, is inexpensive, and must be digested before use. Calcium hydroxide has a condensing effect on waste water and is easily settled and separated.
The acidic neutralizer uses sulfuric acid, hydrochloric acid, nitric acid, and the like. The use of acidic waste liquids, such as waste sulfuric acid or waste nitric acid (aged anodizing bath or neutralization liquid), waste treatment, comprehensive utilization.
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Ms. susan zhang
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