Review on treatment technologies of coal gasification wastewater in China

This review studies the prominent wastewater pollution problems and their forming factors in the development of the coal chemical industry in China. Through the comprehensive investigation of this industry and the collection of wastewater treatment technologies of existing and planned projects, this research analyzes the sources and restrictive factors of coal chemical wastewater pollutants. The processes of coal chemical wastewater treatment generally include pretreatment, biochemical treatment, and depth treatment. This review analyzes all the treatment technologies of the typical coal chemical wastewater projects investigated in China based on these three processes. From the evaluation of the advantages and disadvantages of each technology, the core treatment technologies suitable for the sustainable development of modern coal chemical enterprises have been selected. This study can provide technical support and environmental management ideas for energy conservation, emission reduction, and sustainable development in the domain of the coal chemical industry and provide references for solving the problems of water environment restriction in the long-term development of this industry.