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化工学报  2015 

两种典型滤料厌氧氨氧化效果与工艺运行优化

DOI: 10.11949/j.issn.0438-1157.20140914, PP. 455-463

Keywords: 城市污水,厌氧氨氧化,过滤,生物滤池,生物膜,滤速,反冲洗

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Abstract:

为促进厌氧氨氧化在城市污水处理中的应用,针对陶粒和火山岩两种典型滤料滤池的厌氧氨氧化脱氮效果和关键性工艺参数进行了研究。试验结果表明,接种挂膜启动生物滤池,10d可实现稳定的厌氧氨氧化生物膜,火山岩滤池生物膜量和EPS均高于陶粒。滤料和反冲洗对厌氧氨氧化滤池实现稳定脱氮具有重要影响,低滤速条件下火山岩和陶粒滤池厌氧氨氧化效果基本相同,火山岩滤池和陶粒滤池反冲洗周期均较长,宜采用单独水冲方式;但高滤速条件下火山岩滤池比陶粒滤池更易堵塞,滤层有效深度小,反冲洗方式宜采用气水联合反冲方式,并相应缩短反冲洗周期、延长反冲洗时间。火山岩和陶粒滤池滤速均不宜高于2m·h-1,最高总氮负荷分别可达3.81kg·m-3·d-1和3.56kg·m-3·d-1。

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