Optimization of F/M ratio for stability of aerobic granular process via quantitative sludge discharge.
Optimization of F/M ratio for stability of aerobic granular process via quantitative sludge discharge.
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DOI：
10.1016/j.biortech.2017.12.094
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发表时间：
2018-03
影响因子：
11.4
通讯作者：
Di Wu;Zhiming Zhang;Zhuodong Yu;Liang Zhu
中科院分区：
文献类型：
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作者：
Di Wu;Zhiming Zhang;Zhuodong Yu;Liang Zhu
食物与微生物（F/M）比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。为了保证好氧颗粒过程的稳定性，本研究研究了F/M比的最佳范围以及通过定量污泥排放的可操作的F/M比控制方法。结果表明，当F/M比控制在0.4~0.5gCOD/gSSd时，可获得稳定的好氧颗粒，具有良好的沉降性、较高的污染物去除效率和微生物多样性。此外，还开发了一种通过定量污泥排放的可操作的F/M比控制方法，以验证F/M比优化的可行性。该方法培养出的F/M比为0.4±0.02gCOD/gSSd的好氧颗粒具有较好的污染物去除性能和稳定的结构，EPS中的类蛋白成分较高。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。
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.