摘要
针对新型臭氧-活性炭组合工艺中的降流式生物活性炭滤池的反冲洗方式进行研究。根据对降流式炭滤池不同纳污段出水浊度数据的比较,推断出上部炭层为主要吸收段。根据3种不同的反冲洗方式,以反冲洗历时和反冲洗强度作为研究对象,以提高反冲洗效率,缩短时间,延长周期为目的,确定降流式活性炭滤池的最佳冲洗方式。结果表明,对于新型工艺中降流式活性炭滤池,先气洗5 min,强度为15 L/(m2.s),然后水洗10 min,强度8 L/(m2.s),反冲洗周期可以延长至7 d,并且能够有效地控制后续水头损失的增加。在气水比为0.2:1的曝气条件下,可以将反冲洗周期延长至7 d,炭滤池对有机物仍具有27%以上的高去除率。
This article discussed the backwash technique ofdownflow biological activated carbon filter （BACF） in the.process of new type ozone-BACFtechnology. Base on the variation of effluent turbidity at different height, we concluded that most solids intercepted accumulated in the carbon filter. We compared 3 kinds of backwash technique and researched the influence of backwash period and strength in order to enhance efficiency and extend the cycle of backwash. The result showed that： In new type ozone-BACF technology, air washing should be firstly applied 5 min in the strength of 15 L/（m2·s） and then water washing should be used 10 min in the strength of 8 L/（m2· s）, the cycle of backwash could be prolonged to 7 d. Furthermore, when the gas water ratio was 0.2：1 and the cycle of backwash was 7 d, the removal efficiency for organic matter could still be 27%.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第10期87-89,93,共4页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2009ZX07423-003)
