摘要
采用中试规模的缺氧生物滤池对污水厂的二沉池出水进行深度处理,重点考察了不同水力负荷下的脱氮效果。结果表明,缺氧生物滤池对水力负荷有一定的承受能力,当水力负荷≤4.3 m3/(m2.h)时,滤池对TN的去除率可达到90%以上;当水力负荷增至5.4 m3/(m2.h)时,滤池亦能在滤层高度为1.4 m处将TN降至5 mg/L以下,平均去除率为84%。当水力负荷较小时,脱氮过程主要发生在滤层前段,随着水力负荷的增大,滤层利用率逐渐升高。
A pilot-scale anoxic biofilter was used for the advanced treatment of secondary effluent from WWTP. The denitrification efficiency at different hydraulic loading rates was investigated. The re- sult showed that the biofflter could operate at different hydraulic loading rates. When the hydraulic load- ing rate was equal to or less than 4.3 ma/（m2 ·h） , the removal rate of TN was more than 90%. When the hydraulic loading rate was increased to 5.4 m3/（ m2·h） , the TN decreased to less than 5 mg/L at the filter layer of 1.4 m, and the average removal rate was 84%. With low hydraulic loading rate, deni- trification occurred mainly in the front part of the filter. Increasing the hydraulic loading rate increased the utilization of the filter layer.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第11期82-84,共3页
China Water & Wastewater
基金
北京市自然科学基金资助项目(8122005)
国家自然科学基金资助项目(51078008)
清华大学固体废物处理与环境安全教育部重点实验室开放基金资助项目
关键词
缺氧生物滤池
深度处理
水力负荷
脱氮
anoxic biofilter
advanced treatment
hydraulic loading rate
denitrification
