环境工程学报2026，Vol.20Issue(8)：2718-2728,11.DOI:10.12030/j.cjee.202602046
低温烧制污泥基生物滞留填料的制备及其水力与除污性能研究
Preparation of low-temperature sintered sludge-based bioretention media and its hydraulic and pollutant removal performance study
摘要
Abstract
The resource utilization of excess sludge from wastewater treatment plants and the optimization of filler materials for bioretention facilities are current research focuses in the field of urban stormwater management.Traditional sludge-based fillers often use high-temperature sintering processes,which require high energy consumption and limit their further application.To explore the feasibility of preparing sludge-based bioretention fillers under relatively low-temperature conditions,this study used excess sludge from wastewater treatment plants as the main raw material,introduced zeolite powder as an auxiliary component,set sludge-to-zeolite ratios of 3∶2 and 4∶1,and fired the fillers at 600,800,and 1 000℃.Through simulated device experiments,the study systematically examined the hydraulic performance of the fillers,such as permeability,water retention,and water-holding capacity,under different firing temperatures and mixing ratios,and evaluated their removal effects on NH4+-N,COD,and TP.Additionally,adsorption kinetics models and heavy metal leaching experiments were used to analyze the mechanisms of pollutant removal and the environmental safety of the materials.The results indicated that:1)under the conditions of this study,the filler with a sludge-to-zeolite mass ratio of 4∶1 and a firing temperature of 800 ℃ exhibited relatively superior hydraulic performance,with a permeability coefficient of 42 cm·h-1,while maintaining high water retention and stable water-holding capacity;2)Group E showed good pollutant reduction performance,with removal rates of 64.66%,56.92%,and 64.03%for NH4+-N,COD,and TP,respectively;3)kinetic analysis indicated that the removal processes of NH4+-N and TP followed a pseudo-second-order kinetic model,whereas COD removal was mainly controlled by physical adsorption and external diffusion;4)heavy metal leaching results showed that the filler had good environmental stability under neutral and weakly acidic conditions.The findings provided experimental references for the resource utilization of sludge and further research on low-energy bioretention functional fillers.关键词
污水处理厂污泥/生物滞留填料/低温烧制/水力性能/除污效果Key words
sewage treatment plant sludge/bioretention media/low-temperature firing/hydraulic performance/pollutant removal efficiency分类
建筑与水利引用本文复制引用
郭梓衡,李锋,李勇,周妍..低温烧制污泥基生物滞留填料的制备及其水力与除污性能研究[J].环境工程学报,2026,20(8):2718-2728,11.基金项目
2023年江苏省"双创博士"资助项目(JSSCBS20230456) （JSSCBS20230456）
