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水力负荷对缺氧生物滤池脱氮效能的影响

China Water & Wastewater(2012)

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Abstract
采用中试规模的缺氧生物滤池对污水厂的二沉池出水进行深度处理,重点考察了不同水力负荷下的脱氮效果。结果表明,缺氧生物滤池对水力负荷有一定的承受能力,当水力负荷≤4.3 m3/(m2.h)时,滤池对TN的去除率可达到90%以上;当水力负荷增至5.4 m3/(m2.h)时,滤池亦能在滤层高度为1.4 m处将TN降至5 mg/L以下,平均去除率为84%。当水力负荷较小时,脱氮过程主要发生在滤层前段,随着水力负荷的增大,滤层利用率逐渐升高。
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Key words
denitrification,advanced treatment,anoxic biofilter,hydraulic loading rate
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