Determination of The Optimal Dosage of Chemical Compounds in the Wastewater Treatment Process in Trang Bach Coal Mine: the Laboratory Scale

  • Manh Ha DOAN AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Mickiewicza 30, 30-059 Krakow, Poland;
  • Waldemar MIJAŁ AGH University of Science and Technology, Faculty of Mining and Geoengineering, Department of Environmental Engineering and Mineral Processing, Mickiewicza 30, 30-059 Krakow, Poland


The pH index of Trang Bach coal mine wastewater ranges from 2,8 to 6, meanwhile, the content of Fe, Mn, and turbidity & suspended
solids (TSS) are rather high and it is impossible to discharge the wastewater directly to the environment. In order to achieve
the requirement of QCVN 40:2011/BTNMT standard – The national standard for industrial wastewater quality after treatment of
Vietnam and other purposes, the wastewater need to be treated by several methods such as coagulation-flocculation or sedimentation.
In this article, we intend to find the optimal dosages of chemical compounds for the TSS, pH, Fe and Mn treatment process
for Trang Bach coal mine wastewater in the laboratory modular.