The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, People's Republic of China.
State Key Lab Plateau Ecology and Agriculture, Qinghai University, Xining, People's Republic of China.
Environ Technol. 2021 Oct;42(24):3716-3724. doi: 10.1080/09593330.2020.1739147. Epub 2020 Mar 16.
sp. LAD9 capable of heterotrophic-aerobic nitrogen removal was applied into a single biological aerated filter (BAF) for bioaugmented treatment of municipal wastewater. The achievement of simultaneous nitrogen and carbon removal in the bioaugmented system was systematically evaluated by ratios of COD to nitrogen (COD/N), ranging from 1 to 20. The results showed that at an appropriate COD/N ratio of 10, the BAF exhibited excellent carbon and nutrients removal, the averaged removal efficiencies for COD, NH-N and TN were 92.3%, 100% and 80.0%, respectively. Long-term operation of the bioaugmented system also confirmed the stability of the treatment efficiency. Further comparisons of SOUR and PCR-DGGE profiles between the bioaugmented and the control system revealed that the introduction of strain LAD9 greatly changed the structure of original microbial community and facilitated their capabilities of aerobic nutrients removal. The proposed bioaugmentation strategy is of particular importance to upgrading or retrofitting concurrent municipal wastewater treatment systems.
一株能够异养-好氧脱氮的 sp. LAD9 被应用于单个曝气生物滤池（BAF）中，用于增强处理城市污水的生物强化处理。通过 COD 与氮（COD/N）的比值从 1 到 20 来系统评估生物强化系统中同时去除氮和碳的效果。结果表明，在适当的 COD/N 比为 10 时，BAF 表现出优异的碳和营养物去除效果，COD、NH-N 和 TN 的平均去除效率分别为 92.3%、100%和 80.0%。生物强化系统的长期运行也证实了处理效率的稳定性。对生物强化系统和对照组的 SOUR 和 PCR-DGGE 图谱进行进一步比较，表明 LAD9 菌株的引入极大地改变了原始微生物群落的结构，提高了它们的好氧营养物去除能力。该生物强化策略对于升级或改造现有的城市污水处理系统具有特别重要的意义。
