Prediction of the effect of fine grit on the MLVSS/MLSS ratio of activated sludge

被引：70

作者：

Fan, Jianping ^{[1
,2
]}

Ji, Fangying ^{[1
,2
]}

Xu, Xiaoyi ^{[1
,2
]}

Wang, Ying ^{[1
,2
]}

Yan, Dachao ^{[1
,2
]}

Xu, Xuan ^{[1
,2
]}

Chen, Qingkong ^{[3
]}

Xiong, Jingzhong ^{[4
]}

He, Qiang ^{[1
,2
]}

机构：

[1] Chongqing Univ, Key Lab Gorges Reservoir Regions Ecoenvironm 3, Minist Educ, Chongqing 400045, Peoples R China

[2] Chongqing Univ, Natl Ctr Int Res Lowcarbon & Green Bldg, Chongqing 400045, Peoples R China

[3] Chongqing Jiaotong Univ, Sch River & Ocean Engn, Chongqing 400074, Peoples R China

[4] China Airport Construct Grp Corp, Chengdu 610202, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 190卷

关键词：

Fine grit; Activated sludge; Prediction model; MLVSS/MLSS ratio; Particle size; INORGANIC SUSPENDED-SOLIDS; LOW ORGANIC CONTENT; PROCESS REDUCTION; OPTIMIZATION; SIMULATION; OXIDATION; REMOVAL; REACTOR; MODEL; PERFORMANCE;

D O I：

10.1016/j.biortech.2015.04.035

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：51 / 56

页数：6

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