Enhance nitrogen removal via endogenous denitrification in a sludge double recirculation-anaerobic/aerobic/anoxic process
Xinjie GAO, Zaizhou XU, Yongzhen PENG, Yuwei HUANG, Jing DING, Zeming AN, Chuanxin WANG
CIESC Journal . 2022, (11): 5098 -5105 .  DOI: 10.11949/0438-1157.20221008