| Title: | Prediction of the effect of fine grit on the MLVSS/MLSS ratio of activated sludge |
| Author(s): | Fan J; Ji F; Xu X; Wang Y; Yan D; Xu X; Chen Q; Xiong J; He Q; |
| Address: | "Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China. Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China. Electronic address: jfytougao@163.com. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China. The Southwest Subsidiary Company of China Airport Construction Group Corporation, Chengdu 610202, China" |
| DOI: | 10.1016/j.biortech.2015.04.035 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "This paper investigated the suspension properties of fine grit with different particle sizes in a bioreactor and developed a model to predict its effect on the ratio of mixed liquor volatile suspended solids to the mixed liquor suspended solids (MLVSS/MLSS) of activated sludge. The experimental results revealed that a smaller particle size corresponds to a larger suspension ratio, defined as the proportion of fine grit brought in by influent that is suspended in the activated sludge, and a smaller MLVSS/MLSS ratio. The model demonstrated that the effect of fine grit on the MLVSS/MLSS ratio is related to the fine grit concentration and chemical oxygen demand in influent and the observed sludge yield. However, fine grit has no influence on the activity of microorganisms. Wastewater treatment plants (WWTPs) can adjust MLSS based on the MLVSS/MLSS ratio to ensure the stability of MLVSS, which can achieve the stable operation of WWTPs" |
| Keywords: | "*Bacterial Physiological Phenomena Bioreactors/*microbiology Cell Proliferation Computer Simulation *Models, Biological Models, Chemical Sewage/*analysis/*microbiology Volatile Organic Compounds/chemistry/*metabolism Water Pollutants, Chemical/metabolism;" |
| Notes: | "MedlineFan, Jianping Ji, Fangying Xu, Xiaoyi Wang, Ying Yan, Dachao Xu, Xuan Chen, Qingkong Xiong, Jingzhong He, Qiang eng Research Support, Non-U.S. Gov't England 2015/04/29 Bioresour Technol. 2015 Aug; 190:51-6. doi: 10.1016/j.biortech.2015.04.035. Epub 2015 Apr 22" |
