Aeration optimization of large-scale membrane bioreactors in a sewage treatment plant

摘要

Increasing stringency of environmental discharge standards has triggered an industry-wide inclination towardsmembrane bioreactors over conventional activated sludge processes to ensure fulfilment of environmental dischargecriteria. Yet, despite its plentiful advantages, high aeration costs remain as a key deterrent to thewidespread adoption of the MBR technology. This backdrop created an impetus for a wastewater treatment companyto develop an efficient MBR air scouring protocol that can be realized in existing plants without retrofitting.Known as pulsed cyclic aeration, plant trial applications have demonstrated that fouling control and aeration savingscan be improved by .30%, resulting in scouring energy consumptions that can be as low as 0.049 kWh/m~3.