Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China.
Institute of Environment Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China.
Bioresour Technol. 2018 Mar;252:150-156. doi: 10.1016/j.biortech.2017.12.094. Epub 2017 Dec 28.
Food to microorganisms (F/M) ratio is one of the most important factors affecting microbial growth and pollutant removal in biological wastewater treatment system. For stability of aerobic granular process, optimal range of F/M ratio and a maneuverable F/M ratio control method via quantitative sludge discharge were investigated in this study. Results showed that stable aerobic granules were achieved with good settleability, high pollutant removal efficiency and microbial diversity when F/M ratio was controlled at 0.4-0.5 gCOD/gSS d. In addition, a maneuverable F/M ratio control method via quantitative sludge discharge was developed to verify the feasibility for optimization of F/M ratio. By this method, aerobic granules cultivated with the F/M ratio of 0.4 ± 0.02 gCOD/gSS d had better pollutant removal performance and stable structure with higher protein-like components in EPS. This study further revealed the importance of F/M ratio in the stability of aerobic granular sludge process.
食微比（F/M）是影响生物废水处理系统中微生物生长和污染物去除的最重要因素之一。为了保证好氧颗粒工艺的稳定性，本研究考察了 F/M 比的最佳范围和通过定量排泥来控制 F/M 比的方法。结果表明，当 F/M 比控制在 0.4-0.5 gCOD/gSS·d 时，可以获得具有良好沉降性能、高污染物去除效率和微生物多样性的稳定好氧颗粒。此外，还开发了一种通过定量排泥来控制 F/M 比的方法，以验证优化 F/M 比的可行性。通过该方法，用 F/M 比为 0.4±0.02 gCOD/gSS·d 培养的好氧颗粒具有更好的污染物去除性能和稳定的结构，其胞外聚合物（EPS）中蛋白质样物质的含量更高。本研究进一步揭示了 F/M 比对好氧颗粒污泥工艺稳定性的重要性。
