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Highly efficient one-step advanced treatment of biologically pretreated coking wastewater by an integration of coagulation and adsorption process
- Li, Jie, Yuan, Xiao, Zhao, Huangpu, Li, Fengting, Lei, Zhongfang, Zhang, Zhenya
- Bioresource technology 2018 v.247 pp. 1206-1209
- adsorption, chemical oxygen demand, coagulation, cyanides, pollutants, toxicity, wastewater
- A novel integrated process of coagulation and adsorption was proposed for the advanced treatment of biologically pretreated coking wastewater. Results of laboratory, pilot, and industrial-scale experiments indicated that this one-step novel process can remove biorefractory pollutants, achieving the maximum chemical oxygen demand (COD) and cyanide removals of around 85.3% and 99.4%, respectively. Its effluent could meet the corresponding discharge standards without any further treatment, i.e., COD <30mg/L, cyanide <0.1mg/L, and improved effluent safety (lower toxicity). The easy operation and high efficiency of this method reflect its engineering-application potential in the tertiary treatment of coking wastewater.