Highly efficient one-step advanced treatment of biologically pretreated coking wastewater by an integration of coagulation and adsorption process

摘要

Highlights?The integrated process was tested for advanced coking wastewater treatment.?Maximum COD and cyanide removals were 85.3% and 99.4%, respectively.?This novel integrated process produced low-toxicity effluent.?Bench, pilot, and industrial-scale tests proved the feasibility of this process.AbstractA 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 thi