Abstract:EPS could act as a reservoir for phosphorus in biological phosphorus removal process. To better understand the physicochemical properties of EPS in the biological phosphorus removal system, two types of EPS taken from the systems that operated complete aerobically with little phosphorus removal ability (R1) and alternative anaerobically/aerobically with excellent phosphorus removal efficiency (R2) were studied. Results showed that protein was predominant in the EPS of R2, while the EPS from R1 was dominated by polysaccharides. Protein-like fluorophores and fulvic acid-like fluorophores were the main EEM spectra in both EPS types, whereas the fluorescence intensity of protein-like substances in R2 was higher than that of R1 at the end of aerobic phase. The content of Ca2+ was higher than Mg2+ in R1, while it was opposite in R2. Meanwhile, the average value of Ca2+ in R1 was 8.67mg/g-MLSS, higher than that of R2 (2.40mg/gMLSS) and the TP contents of R2 (21.65mg/gMLSS) was much higher than that in R1 (13.83mg/gMLSS) at the end of aeration. In addition, the zeta potential of R1 (-35mV) was more negative than that in R2 (-23mV).These results demonstrated that the characteristics of EBPR system was different from the complete-aerobic sludge system.
王然登, 程战利, 彭永臻, 王淑莹. 强化生物除磷系统中胞外聚合物的特性[J]. 中国环境科学, 2014, 34(11): 2838-2843.
WANG Ran-Deng, CHENG Zhan-Li, PENG Yong-Zhen, WANG Shu-Ying. Characteristics of EPS taken from an enhanced biological phosphorus removal system. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(11): 2838-2843.