Integrating microalgae tertiary treatment into activated sludge systems for energy and nutrients recovery from wastewater

摘要

Highlights?The microalgae growth treating secondary effluent and digestate was assessed.?A novel co-pretreatment was evaluated for enhancing microalgae anaerobic digestion.?A steady biomass concentration (1gTSS/L) dominated byScenedesmussp was achieved.?A high organic matter and a complete removal of N-NH4+and P-PO43?, was observed.?CH4yield increased by 130% by microalgae and WAS co-pretreatment and codigestion.AbstractIn this study, microalgae digestate and secondary effluent were used to grow microalgae in a tertiary wastewater treatment, and then, the biomass was co-digested for biogas generation. A 30L closed-photobioreactor was used for microalgae