The aim of this conference was to bring together researchers from Chemical Engineering and to exchange the latest exciting advances of this emerging field.
GENOCOV contributed with an oral presentation on A comprehensive evaluation on the integration of EBPR in a continuous A-stage system, which was a summary of Congcong Zhang’s work during the last two years.
Recovering energy from wastewater in addition to its treatment is a hot trend in the new concept of converting wastewater treatment plants into water resource recovery facilities (WRRFs). Operating at low solid retention time (SRT) is one of the strategies adopted so that carbon mineralisation is minimised and more carbon is, thereby, diverted to anaerobic digestion (i.e. energy recovery). However, low-SRT systems are yet to be fully understood. Our work aims at going one-step beyond in low-SRT systems by integrating Enhanced Biological Phosphorus Removal (EBPR) in short-SRT systems. Hence, the system would be a classical anaerobic/aerobic continuous high-rate system that will, simultaneously, remove P and C and will minimise chemical costs for P removal and will increase energy recovery though anaerobic digestion. Our results show that successful P removal efficiency (PRE) and COD removal efficiency (CRE) were obtained operating at SRT 6, 5 and 4 days at a very low DO (0.5 mg/L). Real wastewater was treated without detecting nitrification. 4 days SRT could reduce even 32 % carbonization compared with 6 days SRT. Biochemical methane potential (BMP) tests showed that the optimal BMP was 296.3 mL CH4•g-1 sludge at SRT=4 d. It is feasible to put into practice in view of saving resource and recovering energy from the wastewater.