Impact of different running conditions on performance of biofilters treating secondary effluent during start-up
文献类型: 外文期刊
作者: Zhang, Shiyang 1 ; Zhu, Changbo 2 ; Xia, Shibin 3 ; Li, Meng 1 ;
作者机构: 1.Wuhan Univ Technol, Sch Civil Engn & Architecture, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploit, Minist Agr China, Guangzhou 510300, Guangdong, Peoples R China
3.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China
关键词: Purification performance; Nitrifying biofilter; Secondary effluent; Intermittent aeration; Nitrification-denitrification
期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )
ISSN: 0960-8524
年卷期: 2019 年 281 卷
页码:
收录情况: SCI
摘要: In this study, the impact of different aeration sequences, hydraulic retention time (HRT), aeration time ratios and external carbon types on performance of biofilters treating secondary effluent during start-up was explored. For an intermittently aerated nitrifying filter, the adjustment of aeration sequence with prior nitrification or denitrification had no significant impact on overall performance. Extending HRT promoted sedimentation and denitrification. However, extending HRT to enhance performance is inadvisable due to incompleted denitrification. Similarly, the impact of different aeration time ratios on performance was not as apparent as that of start-up time. External carbon addition to denitrifying filter could enhance performance with glucose more favorable for denitrification and sodium acetate better for P sequestration. When the synthetic over-standard secondary effluent treated by the nitrifying and denitrifying filters in order with the latter added with glucose, all the monitored indices could reach the A standard (GB 18918-2002, China).
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