环境工程学报2025，Vol.19Issue(1)：115-125,11.DOI:10.12030/j.cjee.202407080
复合改性陶粒生物滤池强化污水厂尾水脱氮除磷
Effect of composite modified ceramsite biofilter to strengthen the nitrogen and phosphorus removal from wastewater plant tail water
摘要
Abstract
With the improvement of the discharge standard of urban wastewater treatment plants,the advanced treatment of low-carbon tailwater of secondary wastewater has become a common concern.In this study,iron powder,pyrite and biochar were used to modify ordinary ceramsite,and the effect of modified ceramsite as fillers on the removal effects of nitrogen and phosphorus from low-carbon tailwater of sewage plants were investigated through comparative experiments.Under temperature of 20 ℃,HRT of 5.9 h,and C/N ratio of about 1:2,the removal rates of TN and TP by the modified ceramsite filter were 98.45％and 69.03％,which were significantly higher than that in the ordinary ceramsite filter of 7.4％and 54.04％.Denitrification,iron-based autotrophic denitrification,sulfur-based autotrophic denitrification,and enriching microbial by biochar synergistically strengthened the denitrification of low-carbon tailwater,and enhanced the denitrification performance of the system;TP removal was a result of the joint action of biological and chemical precipitation.This study provides a good technical solution for the advanced treatment of municipal secondary wastewater treatment plant tailwater,which is of great significance for water environmental protection.关键词
改性陶粒/铁粉/黄铁矿/生物炭/自养反硝化/微生物多样性Key words
modified ceramsite/iron powder/pyrite/biochar/autotrophic denitrification/microbial diversity分类
资源环境引用本文复制引用
宋瑞,余健..复合改性陶粒生物滤池强化污水厂尾水脱氮除磷[J].环境工程学报,2025,19(1):115-125,11.基金项目
湖南创新型省份建设专项经费资助项目(2019SK2111) （2019SK2111）
