The wastewater treatment processes include primary sedimentation using chemical flocculants (polyaluminum chloride, PAC), anaerobic/aerobic (A/O) biochemical treatment (including anaerobic hydrolysis process by anaerobic biofilter and aerobic bioprocess by activated sludge), secondary sedimentation for the settlement of activated sludge, and high-density clarifier by ferrate oxidation.
The flow chart of the plant is shown in Figure 1.