改良AAO工艺间歇曝气对微生物群落特征及运行效果影响
摘要：为保证出水水质稳定达标及达到降低能耗的目的,原采用连续曝气方式的某污水处理厂改良AAO工艺改为间歇曝气方式运行。在连续曝气和间歇曝气方式下,处理工艺均能对污染物进行有效去除。从连续曝气调整为间歇曝气后,活性污泥微生物群落的α-多样性无明显变化,同时,间歇曝气条件下的缺氧池和好氧池内微生物群落结构更加相似。间歇曝气策略能够显著增加生化段硝化细菌和反硝化细菌的相对丰度。调整为间歇曝气后,污水处理厂单位水量处理水电耗节省了18.3%。
关键词：间歇曝气硝化反硝化微生物群落节能污水处理厂
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[2] 韦启信,郑兴灿．影响污水生物脱氮能力的关键水质参数及空间分布特征研究[J]．给水排水,2013,49:127-131．
[3] 张欣瑞,池玉蕾,王倩,等．低碳源条件下供氧模式对活性污泥系统脱氮性能的影响[J/OL]．环境科学：1-17[2020-06-23].https：//doi.org/10.13227/j.hjkx.201912037．
[4] 蒋轶锋,陈浚,王宝贞,等．间歇曝气对硝化菌生长动力学影响及NO-2积累机制[J]．环境科学,2009,30:85-90．
[5] 李亚峰,秦亚敏,谢新立,等．间歇曝气条件下短程硝化的实现及影响因素研究[J]．环境工程学报,2011,5:1518-1521．
[6] 张杰,劳会妹,李冬,等．不同停曝比对连续流亚硝化颗粒污泥运行的影响．环境科学：1-11[2020-06-23].https：//doi.org/10.13227/j.hjkx.202003118．
[7] GU Y,WEI Y,XIANG Q,et al.C:N ratio shaped both taxonomic and functional structure of microbial communities in livestock and poultry breeding wastewater treatment reactor[J].Science of The Total Environment,2019,651:625-633．
[8] KINDAICHI T,YAMAOKA S,UEHARA R,et al.Phylogenetic diversity and ecophysiology of Candidate phylum Saccharibacteria in activated sludge[J].Fems Microbiology E-cology,2016,92．
[9] 张哲,张姚,刘清华,等．连续/间歇曝气MBBR-亚硝化工艺性能及N2O释放特性[J]．中国环境科学,2019,39:5056-5062.
The influence of intermittent aeration in modified AAO process on the characteristics of microbial community and operational performance
Abstract: In order to ensure that the effluent quality meets the standard and achieves the goal of reducing energy consumption,the modified AAO process of a wastewater treatment plant that originally used continuous aeration mode was switched to intermittent aeration mode.In both continuous aeration and intermittent aeration modes,the pollutants can be effectively removed by the treatment process.After adjusting from continuous aeration to intermittent aeration,theα-diversity of microbial community in activated sludge was not changed significantly.Meanwhile,the microbial community structure in the anoxic and aerobic tanks under intermittent aeration became more similar.The relative abundance of nitrifiers and denitrifiers in the biochemical section significantly increased under the intermittent aeration strategy.After adjusting to intermittent aeration,18.3% of the electricity per ton treated wastewater was saved in the wastewater treatment plant.
Keywords: Intermittent aeration; Nitrification; Denitrification; Microbial community; Energy conservation; Wastewater treatment plant;
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