School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China.
Bioprocess Biosyst Eng. 2017 Oct;40(10):1555-1563. doi: 10.1007/s00449-017-1811-1. Epub 2017 Jul 14.
This study investigates the impacts of influent ammonium concentrations on the microbial community in immobilized heterotrophic ammonium removal system. Klebsiella sp. FC61, the immobilized species, has the ability to perform simultaneous ammonium removal and Fe reduction. It was found that average ammonium removal rate decreased from 0.308 to 0.157 mg/L/h, as the influent NH-N was reduced from 20 to 10 mg/L. Meanwhile, at a total Fe concentration of 20 mg/L, the average Fe reduction removal efficiency and rate decreased from 44.61% and 0.18 mg/L/h, to 27.10% and 0.11 mg/L/h, respectively. High-throughput sequencing was used to observe microbial communities in bioreactor Samples B1, B2, and B3, after exposure to different influent NH-N conditions. Results show that higher influent NH-N concentrations increased microbial richness and diversity and that Klebsiella sp. FC61 play a functional role in the simultaneous removal of NH-N and Fe reduction in bioreactor systems.
本研究考察了进水氨氮浓度对固定化异养氨去除系统中微生物群落的影响。固定化物种克雷伯氏菌 FC61 具有同时去除氨氮和还原铁的能力。研究发现，当进水 NH-N 从 20mg/L 降低到 10mg/L 时，平均氨氮去除率从 0.308mg/L/h 降低到 0.157mg/L/h。同时，在总铁浓度为 20mg/L 时，平均铁还原去除效率和速率分别从 44.61%和 0.18mg/L/h 降低到 27.10%和 0.11mg/L/h。高通量测序用于观察在不同进水 NH-N 条件下暴露后的生物反应器样品 B1、B2 和 B3 中的微生物群落。结果表明，较高的进水 NH-N 浓度增加了微生物的丰富度和多样性，克雷伯氏菌 FC61 在生物反应器系统中同时去除 NH-N 和还原铁方面发挥了功能作用。
