USING CHITOSAN AS COAGULANT IN DOMESTIC WASTEWATER TREATMENT PROCESS

Tóm tắt

Alternative coagulants have been considered for wastewater treatment in which chitosan may be of great interest characterized by its treatment efficiency and environmentally friendly behavior. Chitosan was very effective in removing turbidity from raw domestic wastewater at natural pH. The removal efficiency reached 81.42%, and turbidity level was 0.013 (Abs) if 4 mg Chitosan/L used in coagulation. Along with turbidity removal, total organic carbon was also removed with the removal efficiency of 37.11%. However, the capacity of chitosan coagulant in total phosphorus and total nitrogen removal was low, with the removal efficiencies were 19.61% and 10.75% respectively.