硝酸改性竹炭填料BAF处理小城镇污水研究  

Treatment of Small Town Wastewater by BAF with Bamboo Charcoal Modified by Nitric Acid

作　　者：卜云洁[1] 许晓明 颜湘波[1] 王学江[1] 

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092 [2]无锡市政工程设计院,江苏无锡214072

出　　处：《中国给水排水》2014年第17期92-95,共4页China Water & Wastewater

基　　金：国家科技支撑计划项目(2012BAJ21B01)

摘　　要：采用硝酸改性竹炭曝气生物滤池(BAF)和陶粒BAF对小城镇污水进行处理,考察了两种BAF的挂膜启动特性及水力停留时间、溶解氧浓度、回流比对处理效果的影响。结果表明,两种BAF具有相似的挂膜过程;HRT为4 h时,硝酸改性竹炭BAF与陶粒BAF对COD的去除率接近,约为84%,对氨氮的去除率分别约为87.8%和70.6%;硝酸改性竹炭BAF的整体处理效果优于陶粒BAF;硝酸改性竹炭具有廉价、质轻、耐磨和高比表面积等特点,可替代陶粒用作BAF的优质填料,具有良好的应用前景。Two BAFs with bamboo charcoal modified by nitric acid and ceramsite as media were used to treat small town wastewater. The start-up and influences of hydraulic retention time （ HRT）, dissolved oxygen and reflux ratio on the treatment efficiency were investigated. The results showed that the two BAFs had analogous start-up process. When HRT was 4 h, the removal rates of COD in the two BAFs were similar, which was about 84%, and the removal rates of NH4＋ - N were 87.8% and 70.6% respectively. BAF with bamboo charcoal modified by nitric acid had a better performance than BAF with ceramsite. Bamboo charcoal modified by nitric acid is inexpensive, lightweight, wear-resistant and high in specific surface area, and it can replace ceramsite as high quality media in BAF. Also, it has a good appli- cation prospect.

关 键 词：硝酸改性竹炭 陶粒 曝气生物滤池 小城镇污水 

分 类 号：X703[环境科学与工程—环境工程]