环境工程学报2025，Vol.19Issue(10)：2426-2434,9.DOI:10.12030/j.cjee.202412029
不同地区高密度澄清池污泥沉降影响因素及污泥流变性分析
Analysis of factors affecting sludge settlement and sludge rheology in high rate clarifiers in different areas
摘要
Abstract
The high-density clarifier is widely adopted due to its compact footprint,high surface loading rate,and operational efficiency.In this study,to investigate sludge settling characteristics in these clarifiers,sludge samples were collected from a typical high-density clarifier in each of wastewater treatment plants loacted in eight cities across China.A sensitivity analysis was conducted to evaluate factors influencing sludge-settling velocity,combined with an exploration of rheological properties.Results revealed that floc diameter dominated the sludge-settling process across all regions,contributing to 78.7％±5％of the variability.Significant regional variations in sludge rheological properties were observed,with sludge volume index(SVI)exhibiting strong positive correlations with total solids(TS),particle size,and yield stress.The study highlighted that optimal sludge-settling performance in the high-density clarifier required the formation of moderately sized,high-density flocs,which enhancd settling performance and stabilize the sludge layer against fluidization.These findings provide theoretical guidance for the operation and optimization of high-density clarifier.关键词
高密度澄清池/流变性/沉降速度Key words
high rate clarifier/rheological properties/settling velocity分类
资源环境引用本文复制引用
孙观来,郁达伟,吴云生,郭新宇,林新宇,魏源送,刘冰玉..不同地区高密度澄清池污泥沉降影响因素及污泥流变性分析[J].环境工程学报,2025,19(10):2426-2434,9.基金项目
国家自然科学基金资助项目(52170062) （52170062）
