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Advanced nitrogen and phosphorus removal in pilot-scale anaerobic/aerobic/anoxic system for municipal wastewater in Northern China
Bioresource Technology ( IF 11.4 ) Pub Date : 2024-03-20 , DOI: 10.1016/j.biortech.2024.130616 Changkun Gu , Xiyao Li , Shujun Zhang , Jianwei Li , Xiaoyu Gao , Guo Chen , Zhibin Wang , Yongzhen Peng
Bioresource Technology ( IF 11.4 ) Pub Date : 2024-03-20 , DOI: 10.1016/j.biortech.2024.130616 Changkun Gu , Xiyao Li , Shujun Zhang , Jianwei Li , Xiaoyu Gao , Guo Chen , Zhibin Wang , Yongzhen Peng
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Removing nitrogen and phosphorus from low ratio of chemical oxygen demand to total nitrogen and temperature municipal wastewater stays a challenge. In this study, a pilot-scale anaerobic/aerobic/anoxic sequencing batch reactor (A/O/A-SBR) system first treated 15 m/d actual municipal wastewater at 8.1–26.4 °C for 224 days. At the temperature of 15.7 °C, total nitrogen in influent and effluent were 45.5 and 10.9 mg/L, and phosphorus in influent and effluent were 3.9 and 0.1 mg/L. 16 s RNA sequencing results showed the relative abundance of and raised to 1.25 % and 1.52 %. The strategy of excessive, no and normal sludge discharge enriched and balanced the functional bacteria, achieving an endogenous denitrification ratio more than 43.3 %. Sludge reduction and short aerobic time were beneficial to energy saving contrast with a Beijing municipal wastewater treatment. This study has significant implications for the practical application of the AOA-SBR process.
更新日期：2024-03-20
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