Research and Application of Integrated Technology for High Nitrogen and High Salt Wastewater Treatment in Stainless Steel Cold Rolling
This paper points out that stainless steel cold rolling wastewater has become a technical challenge for wastewater treatment in the steel industry due to its high total nitrogen content,complex ion composition,and large water quality fluctuations.This paper develops an efficient denitrification biochemical treatment process of"multi-stage sludge+carbon source complementary A+multi-stage aeration oxidation O",and develops a flexible intelligent precise control model to construct an integrated technology for denitrification and salt reduction treatment of high nitrogen and high salt wastewater,providing a new approach for industry wastewater treatment.At the same time,combined with the transformation of denitrification treatment of a certain cold rolling wastewater,the application is carried out,and the results shows that the total nitrogen and salt removal rates could reach over 98%and 25%respectively.Compared with existing processes,this technology has the highest denitrification treatment efficiency,and the land area,building area,and investment cost of ton nitrogen treatment are minimized,with good economic benefits.
cold rollinghigh nitrogen and high salt wastewaterdenitrificationsalt reduction
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