有机负荷对污泥胞外聚合物(EPS)分泌特性及信号分子释放差异的影响  

SECRETORY CHARACTERISTICS OF EPS AND THE SIGNAL MOLECULES RELEASE UNDER DIFFERENT ORGANIC LOADING

作　　者：李亚静 王少坡[1,2] 刘璐 贾丽媛[3] LI Yajing;WANG Shaopo;LIU Lu;JIA Liyuan(School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Key Laboratory of Aquatic Science and Technology,Tianjin 300384,China;Tianjin IKWEN Water Treatment Co.,Ltd,Tianjin 300000,China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384 [3]天津艾凯文水处理科技有限公司,天津300000

出　　处：《环境工程》2022年第2期47-52,共6页Environmental Engineering

基　　金：天津市教委科研项目(2016CJ09);天津市自然科学基金重点项目(18JCZDJC10080);国家自然科学基金项目(51678388)。

摘　　要：考察了连续流A^(2)/O系统在3个有机负荷[0.29,0.58,1.16 kg COD/(m^(3)·d)]条件下,胞外聚合物(EPS)分泌特性及信号分子(AHLs)的释放差异。结果表明:TB-EPS是污泥系统中EPS主要成分,TB-EPS组分具有较高的分子量,且分子量分布更广。有机负荷对LB-EPS各组分的影响大于TB-EPS。随着有机负荷的增加,LB-EPS中多糖(PS)含量增加趋势较蛋白质(PN)更明显,使得高负荷下污泥系统具有较强的沉降性。不同有机负荷下系统中AHLs的含量和种类相差较大。C10-HSL、C12-HSL和C14-HSL均在污泥中占主导地位。AHLs与LB-EPS及其组分的相关性较弱,较多AHLs类型与TB-EPS存在显著或较强的相关性,为AHLs调节EPS的合成从而实现系统稳定运行提供了理论支撑。The secretion characteristics of extracellular polymers(EPS) and the release of acylated homoserine lactones(AHLs) were investigated under three organic loading conditions [0.29, 0.58, 1.16 kg COD/(m^(3)·d)] in continuous flow A^(2)/O system. The results showed that TB-EPS was the main component of EPS, which had higher molecular weight and wider molecular weight distribution. The effect of organic loading on the components of LB-EPS was greater than that of TB-EPS. The increasing trend of polysaccharide(PS) content in LB-EPS was more obvious than that of protein(PN) with the increase of organic loading, making the sludge system have stronger settling property under high organic loading. The content and species of AHLs under different organic loads were significantly different. C10-HSL, C12-HSL and C14-HSL were dominant in sludge system. The correlation between AHLs and LB-EPS was weak, and there were significant or strong correlations between many types of AHLs and TB-EPS, which provided theoretical support for AHLs regulating EPS synthesis to achieve stable operation of the system.

关 键 词：有机负荷 沉降性 脱氮除磷 胞外聚合物 信号分子 

分 类 号：X703[环境科学与工程—环境工程]