Hydrocycloning Influent, Mixed Liquor or Return Activated Sludge for Best Grit Removal and Sludge Production Reduction

This paper explores grit removal from influent and activated sludge as a means to reduce sludge production of biological wastewater treatment plants (WWTPs). Experiments were carried out on a laboratory-scale (13 mm) hydrocyclone on sludge from eight WWTPs in Quebec (Canada) with different industrial loadings and combinations of preliminary and primary treatment. Full-scale hydrocycloning (50 mm)...