TY - JOUR A1 - Huy, Z A1 - Nguyen, H A1 - Das, A A1 - Hu, Z T1 - Improving Nitrogen Removal in Two Modified Decentralized Wastewater Systems Y1 - 2011//01 N1 - SU833545 JF - WATER ENVIRONMENT RESEARCH J1 - WATER ENVIRON RES VL - 83 IS - 8 SP - 722 EP - 780 ER -