Treatment method of pickling wastewater
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I would like to ask all sea friends how to deal with the wastewater generated by pickling in daily production. Our company makes complete sets of equipment and has always used pickling treatment for stainless steel welds. Although the amount of waste water generated is very small, I always feel that some treatment should be done. I hope all sea friends can give me some advice.
This post was last edited by qugd on 2017-2-6 11:43 It depends on what kind of acid is used for washing. If it is conventional pickling, that is, sulfuric acid, hydrochloric acid, and nitric acid, the waste acid liquid washed out can enter the conventional water treatment process after neutralization. If the lotion contains hydrofluoric acid, it must be treated with hydrofluoric acid or fluoride before subsequent treatment.
Hi, what neutralizing reagent do you usually use?
Of course, alkali is used to neutralize acid. Soda ash, caustic soda, and quicklime can all be used. Calculate which alkali is suitable through cost, process, effect, environmental protection and other corresponding indicators.
Do some testing first and then make a treatment plan. It is always worthwhile to invest in the environment.
Yes, although the amount is very small, I still feel that it is better to deal with it.
It would be great if so many manufacturers have this idea
If the volume is small and there is a discharge permit, then the discharge will be processed. If not, the evaporation system can be considered and the concentration is outsourced.