摘要
采用复合曝气生物滤池工艺(生物活性炭BAC+曝气生物滤池BAF)将常规生化过滤、活性炭吸附与生物膜氧化技术相结合,对微污染源水处理进行试验研究,以期为其工程应用提供理论依据。结果表明,在源水为Ⅳ类水的情况下,复合BAF反应器对水中COD_(Mn)和UV_(254)的平均去除率分别为25.8%和18.4%,对NH3-N及浊度的平均去除率分别为86.2%和53.6%。复合曝气生物滤池工艺作为微污染源水的预处理净水设施能有效改善饮用水处理水质。在进一步进行其他几项水质指标的试验研究以及优化运行参数后可应用于工程实践。
The present paper is inclined to introduce our improved treating approach to micro-scale polluted water source pretreated with BAF Compound. BAF （Biological Aerated Filter） technology has been rising and matured in the west at the end of the 80 s and early 90 s in the previous century as a new sewage purifying process for its proper features for water source retreating, particularly useful for treating slightly polluted water source with conventional chemicals, biological filtration of activated carbon. The Compound BAF bioreactor is 100 wan in diameter with its Perspex column 2.5 m high. The filter, classified into two levels, can be used to run up to the flue mode with a water-and-mud-exhausting tube at the bottom. Its upper part is by nature a polystyrene plastic filler-layer with particles of 2 - 3 mm in diameter, whereas its lower part is the granular activated carbon filler-layer with particles of 3 - 5 mm in diameter. What is more, the baffles are fixed at the top of the filler hoping to prevent the loss of suspended filler. The auxiliary aeration tubes are located in the central of filter bed, behind which there are placed aeration and backwashing pipes. Finally, the space at the bottom of the filler is reserved so as to prevent the expansion of the filler when backwashing. The results of our study show that in case the raw water is water for Ⅳ, the BAF would be producing a good effect, with the average removal rate of CODMn, UV254, NH3 - N and turbidity being 25.8 %, 18.4%, 86.2% and 53.6% respectively. The compound BAF pretreating process can effectively improve the quality of water resources. Furthermore, corresponding water quality indicators in the pilot study and the further tests to obtain optimal operation parameters, the process can be applied to some other engineering practices.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2009年第3期29-32,共4页
Journal of Safety and Environment
基金
"十一五"国家科技支撑重点项目(2006BADOIB09 -1)
关键词
市政工程
复合生物滤池
微污染
源水
municipal engineering
compound BAF
micro-scale polluted
water source
