首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
厌氧氨氧化颗粒污泥EPS及其对污泥表面特性的影响
摘要点击 1561  全文点击 579  投稿时间:2018-09-18  修订日期:2018-12-11
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  厌氧氨氧化 (ANAMMOX)  颗粒污泥  胞外聚合物(EPS)  粒径  表面特性
英文关键词  anaerobic ammonium oxidation(ANAMMOX)  granular sludge  extracellular polymeric substances(EPS)  particle size  surface characteristics
作者单位E-mail
杨明明 重庆大学城市建设与环境工程学院, 重庆 400045 937365878@qq.com 
刘子涵 重庆大学城市建设与环境工程学院, 重庆 400045  
周杨 重庆大学城市建设与环境工程学院, 重庆 400045  
祁菁 重庆大学城市建设与环境工程学院, 重庆 400045  
赵凡 重庆大学城市建设与环境工程学院, 重庆 400045  
郭劲松 重庆大学城市建设与环境工程学院, 重庆 400045  
方芳 重庆大学城市建设与环境工程学院, 重庆 400045 fangfangcq@cqu.edu.cn 
中文摘要
      取厌氧氨氧化EGSB反应器中颗粒污泥,根据粒径筛分为R1(0.5~1.4 mm)、R2(1.4~2.8 mm)和R3(>2.8 mm)这3组.提取不同粒径厌氧氨氧化颗粒污泥EPS,分析EPS特性及其对厌氧氨氧化聚集体表面特性的影响.随着厌氧氨氧化颗粒污泥粒径的增加,PS含量介于(10.69±0.11)~(12.28±0.15)mg·g-1之间,而PN含量从(56.88±0.86)mg·g-1增加到(98.59±2.10)mg·g-1,且PN/PS从5.32提高到9.05.不同粒径厌氧氨氧化颗粒污泥EPS官能团及三维荧光组分含量不同.随着颗粒污泥粒径增大,蛋白质二级结构α-螺旋/(β-折叠+无规卷曲)值从0.60逐渐降低到0.43,这种变化有利于污泥表面疏水性的表达.随着颗粒污泥粒径的增大,污泥表面疏水性由54.2%提高到63.1%,Zeta电位由-41.2 mV增加到-31.5 mV,疏水性的增强和表面电荷的增大有利于颗粒污泥的聚集.厌氧氨氧化颗粒污泥EPS可以增强污泥疏水性和提高Zeta电位,EPS中的PN发挥着重要的作用.
英文摘要
      The anaerobic ammonium oxidation(ANAMMOX) granular sludge in the EGSB reactor was divided into three groups according to particle size, which were R1 (0.5-1.4 mm), R2 (1.4-2.8 mm), and R3 (>2.8 mm). Extracellular polymeric substances (EPS) of different sizes from ANAMMOX granular sludge were extracted, and the EPS characteristics and their influence on the surface characteristics of ANAMMOX aggregates were analyzed. With the increased particle size of ANAMMOX granular sludge, the PS content was between (10.69±0.11)-(12.28±0.15) mg·g-1, while the PN content increased from (56.88±0.86) mg·g-1 to (98.59±2.10) mg·g-1, and PN/PS increased from 5.32 to 9.05. The EPS functional groups and the content of three-dimensional fluorescent components of different size ANAMMOX granular sludge were different. As the granular sludge size increased, the value of α-helix/(β-sheet + random coil) gradually decreased from 0.60 to 0.43, which is beneficial to the hydrophobicity expression of the sludge. Due to the increased particle size of the granular sludge, the hydrophobicity of the sludge surface increased from 54.2% to 63.1%, and the Zeta potential increased from -41.2 mV to -31.5 mV. The increased hydrophobicity and surface charge are beneficial to the formation of sludge aggregates. EPS can enhance ANAMMOX sludge hydrophobicity and increase Zeta potential. The presence of PN in EPS is essential to this process.

您是第51721802位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2