Chloroethylene mercury-containing wastewater treatment device
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This year, a project for treating mercury-containing wastewater is planned. The preliminary treatment process involves using Na2S for precipitation, followed by flocculation with polyaluminum chloride, and then adsorption using resins; the discharge standards require the mercury level to be below 3 ppb. I would like to ask if any of the other companies have mature processes in this area that I could learn from!
The method of using alkali sulfide to remove mercury is currently the mainstream approach, but an excess of sodium sulfide can easily react with mercury sulfide, leading to the hydrolysis of mercury salts. Multiple professional wastewater treatment companies use their own composite additives to form complexes that stabilize mercury salts, resulting in a higher efficiency in mercury removal.
We do not have a deep desorption unit, and we plan to treat the waste acid and waste alkali together after neutralization. I’m not sure how well the hydrochloric acid deep desorption units are performing in the industry these days How many processes are there? The amount of deep desorption acid decreases.
First, it is necessary to identify the sources and quantities of all mercury-containing waste (liquids). Based on our operational experience, to neutralize the by-product hydrochloric acid as well as the waste alkali, a very large-scale facility for treating mercury-containing wastewater would be required. When considering reuse of the treated water, factors such as the areas where it will be used and its impact on operations must be taken into account, along with the associated operating costs. Generally speaking, it would be advisable to consult with environmental treatment agencies, as the volume of acid-base neutralization required is quite large