study on a coal washing wastewater treatment process in india

study on a coal washing wastewater treatment process in india
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  • How to treat coal chemical wastewater?
  • In practical engineering applications, the combination of multiple technologies is the most effective method for treating coal chemical wastewater ( Shi, Han, Xu, & Han, 2018 ). The coal chemical wastewater treatment mainly includes three parts: physical and chemical pretreatment, biological treatment, and advanced treatment.
  • What is coal-washing wastewater?
  • Coal-washing wastewater is the residual produced by the coal industry, which may represent a high risk of serious environmental problems worldwide. However, prevailing coal-washing treatment processes are hardly ideal for achieving the goal of solid–liquid separation due to the wastewater’s extremely stable physicochemical properties.
  • What is the treatment method for coal-washing wastewater?
  • At present, the most widely applied industrial treatment method for coal-washing wastewater is coagulation–flocculation (Duong et al. 2000; Jiang 2015; Lee et al. 2014; Maria et al. 2021; Teh et al. 2016 ), a flowchart of which is provided in Fig. 1.
  • What is coal-washing practice?
  • Mainly by DMC (diameter 1000 mm or more), Drums or baths in some plants, Jigs at few plants. Number of coal producing countries have been involved in coal-washing practices to meet the benchmarks standards for exporting thermal coal and to obtain desired quality (GCV) and characteristics (Ash %).