Practice of concentrated water treatment after desalination treatment of wastewater in iron and steel enterprises
DENG Ping1，GONG Lei1,ZHENG Yun- xia2
1. Ministry of Energy and Environmental Protection, Ningbo Iron and Steel Co., Ltd.， Ningbo 315807, Zhejiang,China 2. Ningbo Meishan Island Development and Investment Co., Ltd., Ningbo 315832, Zhejing, China
Abstract：With the extensive application of the wastewater desalination treatment in iron and steel enterprises, the rational treatment of the desalination concentrated water has become a key link in the deep treatment of sewage in steel enterprises. Taking the desalination concentrated water treatment in an iron and steel enterprise as an example, aiming at the raw water quality index and the desalination concentrated water control standard, the desalination concentrated water process is designed, and the principles and functions of each unit are introduced. Through the actual operation, the effect on the chemical oxygen demand, ammonia nitrogen and total nitrogen treatment is analyzed in detail. After being treated with the desalination concentrated water, the special discharge limit requirement of "iron and steel industry water pollutant discharge standard" (GB 13456—2012) can be achieved. The cost of the concentrated water treatment by the first order desalination is about 6 yuan /m3, and the cost of the super concentrated water treatment by the two level desalination is about 15 yuan/m3.
邓平 巩磊 郑云霞. 钢铁企业污水深度处理后浓盐水处理实践[J]. 中国冶金, 2018, 28(10): 67-71.
DENG Ping，GONG Lei,ZHENG Yun- xia. Practice of concentrated water treatment after desalination treatment of wastewater in iron and steel enterprises[J]. China Metallurgy, 2018, 28(10): 67-71.
2018, Vol. 28 
