摘要
聚磷菌(Phosphorus accumulating bacteria,PAOs)在生物除磷系统(EBPR)的强化过程中发挥着重要作用。挖掘新型高效聚磷菌并优化其除磷工艺,对于废水生物除磷技术的发展具有重大意义。文章通过富集驯化、分离纯化,结合MOPS蓝白斑(10×)初筛、Albert异染颗粒复筛等方法从某污水处理厂污泥样品中筛选出一株高效聚磷细菌G2,将其鉴定为盐生谷氨酸杆菌(Glutamicibacter halophytocola),并通过单因素试验探究pH、温度、接种量、初始磷含量,以及水体中的阳离子浓度对菌株G2生长及除磷的影响。实验结果表明,该菌株在初始磷浓度为30 mg/L、pH为8.0、8.0%接种量、32℃的条件下发酵72 h后,磷去除率可达78.79%。同时,添加2.0%的Mg^(2+)可以将菌株G2在人工合成废水中的除磷率提高17.50%。文章所筛选出的盐生谷氨酸杆菌G2在人工合成废水中表现出了良好的除磷效果,有望为废水生物除磷技术提供优质菌种资源。
Phosphorus-accumulating bacteria(PAOs)plays an important role in the enhanced biological phosphorus removal(EBPR)system.Exploring new and efficient phosphorus-accumulating bacteria and optimizing the optimal phosphorus removal process are of great significance for the further development of biological phosphorus removal technology in wastewater.This paper uses enrichment and domestication,and separation and purification,combined with MOPS blue and white spots(10×)and initial screening and Albert particle re screening and other methods,to selected a high-efficiency phosphorus-accumulating bacterium G2 from sludge samples of a sewage treatment plant,which is identified as Glutamicibacter halophytocola.The effects of pH,temperature,inoculation amount,initial phosphorus content,and cation concentration in water on the growth and phosphorus removal of strain G2 are investigated through a single factor experiment.The results show that under the initial phosphorus concentration of 30 mg/L,pH 8.0,8.0%inoculation amount,and temperature of 32℃,the phosphorus removal rate of the strain can reach 78.79%after 72 hours of fermentation.Meanwhile,2.0%Mg^(2+)can significantly improve the phosphorus removal rate of strain G2 in artificially synthesized wastewater by 17.50%.The Glutamicibacter sp.G2 screened in this paper has a good phosphorus removal effect in artificially synthesized wastewater,and is expected to provide excellent bacterial resources for biological phosphorus removal technology in wastewater.
作者
习彦花
吴健
孙立博
魏帅强
吕亚天
程辉彩
XI Yanhua;WU Jian;SUN Libo;WEI Shuaiqiang;LV Yatian;CHENG Huicai(Biology Institute,Hebei Academy of Sciences,Shijiazhuang 050081,China;School of Landscape and Ecological Engineering,Hebei University of Engineering,Handan 056038,China;School of Water Resources and Environment,Hebei GEO University,Shijiazhuang 050031,China)
出处
《工业微生物》
CAS
2024年第3期119-125,共7页
Industrial Microbiology
基金
河北省重点研发项目(22373803D)
河北省“三三三人才工程”资助项目(C20221007)
河北省科学院高层次人才培养与资助项目(2023G08)。
关键词
聚磷菌
分离鉴定
Glutamicibacter
sp.G2
合成废水
除磷特性
phosphorus-accumulating bacteria
isolation and identification
Glutamicibacter sp.G2
synthetic wastewater
phosphorus removal characteristics
