https://scholars.lib.ntu.edu.tw/handle/123456789/630107
標題: | Shifts of microbial community structure along substrate concentration gradients in immobilized biomass for nitrogen removal | 作者: | Tsai, Shao Wei Schwinghammer, Larissa Lee, Chien Hsien CHENG-FANG LIN CHIA-HUNG HOU |
關鍵字: | WASTE-WATER-TREATMENT; SIMULTANEOUS NITRIFICATION-DENITRIFICATION; SEQUENCING BATCH BIOFILM; AEROBIC DENITRIFICATION; INTERMITTENT AERATION; PHOSPHORUS REMOVAL; REACTOR; CARBON; CELLS; TIME | 公開日期: | 1-十二月-2022 | 出版社: | NATURE PORTFOLIO | 卷: | 5 | 期: | 1 | 來源出版物: | npj Clean Water | 摘要: | Immobilized biomass technology has been regarded as an effective strategy to enhance simultaneous nitrification and denitrification (SND) in existing aerobic biological wastewater treatment processes. Nevertheless, the mechanisms of SND in an aerobic immobilized biomass need to be proven. In this study, waste sludge from municipal wastewater treatment plants was immobilized by cellulose triacetate as bioplates, and an immobilized bioplate reactor (IBPR) was successfully established for nitrogen removal tests. The SND efficiency of the IBPR was increased 18% under the intermittent aeration (IA) mode compared with that under the continuous aeration (CA) mode. During IA operation, the IBPR achieved 96% COD removal and 76% NH4+-N removal, with 71% SND. The results of microbial community analysis by high-throughput sequencing showed that nitrogen-related functional bacteria were more abundant in the bioplates than in the attached biofilms. The colocalization of nitrifiers and denitrifiers in the bioplates was observed, and the microbial community of nitrogen-related functional bacteria clearly shifted with the substrate concentration gradients. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630107 | ISSN: | 2059-7037 | DOI: | 10.1038/s41545-022-00166-1 |
顯示於: | 環境工程學研究所 |
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