生物砂滤池去除亚硝酸盐氮的效果及影响因素分析  

Removal Effect of Nitrite Nitrogen by Biological Sand Filter and Its Influencing Factor

作　　者：李思敏[1] 孟庆梅[1] 姚宏伟[1] 张朋菲[1] 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056038

出　　处：《中国给水排水》2006年第3期55-57,共3页China Water & Wastewater

基　　金：河北省自然科学基金资助项目(503400)

摘　　要：以邯郸市滏阳河微污染原水为对象,研究了生物砂滤池对NO2--N的去除效果及温度、NH4+-N、NO2--N、CODMn、反冲洗等对去除NO2--N的影响。试验结果表明:生物砂滤池对NO2--N的平均去除率为89.3%;水温是影响生物砂滤池去除NO2--N效果的主要因素,低水温时去除NO2--N的效果较差;在水温相同的条件下,当原水NH4+-N浓度较高时生物砂滤池出水NO2--N浓度也较高;原水NO2--N浓度越高则对其去除率越高;在水温及NH4+-N和NO2--N浓度相同的条件下,原水CODMn值越大则对NO2--N的去除率越低,反之则越高。为防止附着在滤料表面生物量的流失,宜采用不加氯水进行反冲洗;为保证对NO2--N的去除效果,应控制水中溶解氧>5 mg/L。生物砂滤池去除NO2--N的效果优于普通砂滤池,是一种经济、有效的给水处理技术。The effects of NO2^- - N removal in micro-polluted water and its influencing factors such as temperature, NH4^＋ -N, NO2^- -N, CODMn, and backwash etc. were investigated. The result shows that the removal of NO2^- - N by biological sand filter is apparent and its average removal rate is 89.3 %. Temperature is the main influencing factor. The removal effect is ineffective at low temperature. At the same temperature, when NH4^＋ - N concentration in raw water is high, the effluent NO2^- - N concentration is also high. Under the same temperature and same concentration of NH4^＋ - N and NO2^- - N, the higher the CODMn is, the lower removal efficiency of NO2 - N is, and the higher of the opposite. In order to avoid the losing of the biomass on filter, water of no chlorine is used in backwashing. And DO is kept above 5 mg/L to ensure the removal of NO2^- - N. The removal of NO2^- - N by biological sand filter is better than ordinary sand filter. Biological sand filter is an economic and effective treatment technique.

关 键 词：微污染原水 生物砂滤池 NO2^--N CODMN 温度 

分 类 号：TU991.2[建筑科学—市政工程]