摘要
采用生物滤池处理高铁、高锰、高氨氮地下水时,存在启动时间长的问题,鉴于此,采用双层滤料、单层滤料回流、单层滤料不回流三种启动方式同时启动三根滤柱,考察双层滤料和回流对启动时间的影响。结果表明,采用双层滤料或回流均能有效缩短启动时间,三根滤柱出水中的总铁、锰、氨氮分别在第82、81、103天降到了0.3、0.05、0.2 mg/L以下。进一步的分析发现,铁主要在0～0.4 m滤层被去除,锰的去除最初是锰砂吸附,当氨氮浓度降到一定程度后,生物除锰效果迅速提高,锰和氨氮均主要在0～0.4 m滤层被去除。
Biofilter has a problem of long start-up period when it is adopted to purify groundwater containing high concentrations of iron, manganese and ammonia nitrogen. In order to investigate the effect of double-filtering media and circulation reflux on start-up, three starting modes were adopted in three same filters with double-filtering media, circulation reflux of single-filtering media and no circulation reflux of single-filtering media, respectively. The results showed that double-filtering media or circulation reflux was an effective way to shorten the start-up period. The total iron, manganese and ammonia nitrogen in the effluent of the three filters were below 0.3 mg/L, 0.05 mg/L and 0.2 mg/L on the 82nd, 81st and 103rd day, respectively. Iron was removed mainly in the depth of 0 to 0.4 m. Manganese was adsorbed by manganese sand at the beginning, and biological manganese removal was improved gradually after ammonia nitrogen was reduced to a certain extent. Manganese and iron were removed mainly in the depth of 0 to 0.4 m.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第7期41-44,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(51222807)
教育部新世纪优秀人才支持计划项目(NCET-10-0008)
关键词
高铁
高锰
高氨氮地下水
生物净化
启动
回流
双层滤料
groundwater containing high concentrations of iron, manganese and ammonia nitro-gen
biological purification
start-up
circulation reflux
double-filtering media
