Study on nitrogen removal performance and mechanism of external carbon source added two-stages multi-soil-layering systems for low pollutant loading wastewater treatment
The MSL( multi-soil-layering,MSL) systems with one aerobic stage and one anaerobic stage were set up for the low pollutant loading wastewater treatment. The denitrification effect in anaerobic stage was enhanced by external carbon source addition,which were selected as the sawdust for MSL1 system and the PHBV( poly-3-hydroxybutyrate-co-3-hydroxyvalerate) mixed GC-4 carbon source for MSL2 system. Operation conditions including temperature and hydraulic loading were varied for system performance evaluation. W...