摘要
以污泥转移SBR工艺为对象,采用人工模拟城市污水研究了非平衡条件下活性污泥中胞外聚合物(EPS)除磷效能及机制。研究表明,污泥转移显著强化了SBR中活性污泥的蓄磷能力,好氧末端污泥中TP含量达到37.71mg/(g MLSS),EPS好氧吸磷量占比高达98.31%,其厌氧比释磷速率高达28.88 mg/(g·h),而活性污泥在经历厌氧/好氧过程中胞内的聚磷(Poly-P)变化不显著。证明了活性污泥通过高/低基质负荷下的厌氧/好氧交替,实现以EPS为载体对磷酸盐的快速吸收与释放。该技术可成为未来城市污水中磷资源回收的可选生物技术手段之一。
In this paper, the phosphorus removal efficiency and mechanism of extracellular polymer （EPS） in activated sludge under unbalanced conditions were studied by using SBR process. The results showed that the sludge shift significantly enhanced the phosphorus storage capacity of the activated sludge in SBR, the content of TP in the sludge at the end of aerobic phase reached 37.71 mg/（g MLSS）, the proportion of the phosphate uptaken by EPS reached 98.31%, and the phosphorus release rate in the anaerobic phase reached 28.88 mg/（g .h）, while the Poly-P in the activated sludge during anaerobic/aerobic process didn＇t present a significant change. It is proved that the activated sludge can rapidly absorb and release phosphate with EPS through the alternation of anaerobic and aerobic processes under the condition of high/low substrate load. This technology can be used as an alternative biological technology to recover phosphorus resources in future WWTPs.
作者
潘杨
单捷
周晓华
黄勇
PAN Yang;SHAN Jie;ZHOU Xiaohua;HUANG Yong(School of Environmental Science and Engineering,SUST,Suzhou 215009,China;National ＆ Local Joint Engineering Laboratory for Munieipal Sewage Resource Utilization Technology,SUST,Suzhou 215009,China)
出处
《苏州科技大学学报（工程技术版）》
CAS
2018年第4期14-20,共7页
Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）
基金
国家自然科学基金项目(51778390)
江苏省自然科学基金项目(BK20171219)
江苏省研究生科研与实践创新项目(SJCX18_0867)
关键词
EPS
聚磷菌
释磷速率
EBPR
SBR
EPS
phosphate accumulating bacteria
phosphorus release rate
EBPR
SBR
