Innovative process for granulation of conventional continuous flow activated sludge : A novel cost effective Infra-stretching concept to treat more flow and remove/ recover more nutrients without expanding your plant

摘要

In a collaborative effort between AECOM and the City of Penticton, British Columbia, the formation of granular sludge was examined in the full scale continuous flow activated sludge wastewater treatment plant in Penticton (began in 2018 and is ongoing). The Westbank process was the baseline configuration but minor modifications were made to induce and enhance granule formation and provide retention within the process. This paper will share the details on the various process flow configurations tested, successes and failures, lessons learned and future work. Aerobic granulation was demonstrated feasible under continuous flow providing adequate treatment effluent TP < 0.3 mg/L and TN< 6 mg/L.