磁环境下AAO工艺中的微生物群落演替规律  

Succession Regulations of Microflora in AAO Process under Magnetic Environment

作　　者：王越 王嘉斌[1] 赵培海 宋健 WANG Yue;WANG Jiabin;ZHAO Peihai;SONG Jian(School of Civil Engineering and Architecture,University of Jinan,Jinan 250002,China;Lijin Shengrui Urban Construction Group Co.,Ltd.,Dongying 257400,China;Shandong Environmental Protection Scientific Research and Design Institute Co.,Ltd.,250109,China)

机构地区：[1]济南大学土木建筑学院,山东济南250002 [2]利津县胜瑞城市建设集团有限公司,山东东营257400 [3]山东省环境保护科学研究设计院有限公司,山东济南250109

出　　处：《净水技术》2024年第2期90-96,共7页Water Purification Technology

基　　金：国家自然科学基金项目(52100088);济南大学科技计划项目(XBS2001)。

摘　　要：将AAO反应器置于5 mT大小的平均磁场环境,文中研究了磁场对AAO工艺效能的影响,并从分子生物学的角度对其影响机理进行了初步探究。结果表明,在5 mT磁场环境下,AAO工艺启动阶段的平均总氮去除率有较明显提升,比对照组上升6%;AAO反应器启动时间较对照组缩短了5 d;AAO中以固氮螺旋菌(Azospira)为代表的反硝化菌群的相对丰度占比明显提升,丝硫菌属(Thiothrix)的相对丰度占比大幅降低,对污泥膨胀的抑制作用较明显;通过基因功能预测发现磁环境下细胞运动类基因相对丰度相对无磁场条件提升75%,膜运输类基因大幅下降,从而提高了AAO的启动速度,提升了脱氮效能。The effect of magnetic field on the performance of AAO process was studied by placing AAO reactor in an average magnetic field environment of 5 mT,and mechanism of its effect was preliminarily explored from the perspective of molecular biology.The results showed that under a magnetic field environment of 5 mT,the average total nitrogen removal rate in start-up stage of AAO process was significantly improved,with an increase of 6%compared to the control group;and start-up time of AAO reactor was shortened by 5 days compared with control group.The relative abundance of denitrifying bacteria represented by Azospira in AAO was significantly increased,relative abundance of Thiothrix was greatly reduced,and inhibitory effect on sludge bulking was obvious.Through gene function prediction found that relative abundance of cell movement genes in magnetic environment increased by 75%compared with that in control group,and membrane transport genes decreased significantly,thereby startup speed and denitrification efficiency of AAO were significantly improved.

关 键 词：磁场 AAO工艺 生物脱氮 群落结构 功能基因预测 

分 类 号：TU992[建筑科学—市政工程]