Effect of acetate to glycerol ratio on enhanced biological phosphorus removal. (April 2018)

• Record Type: Journal Article
• Authors: Yang, Guojing; Wang, Dongbo; Yang, Qi; Zhao, Jianwei; Liu, Yiwen; Wang, Qilin; Zeng, Guangming; Li, Xiaoming; Li, Hailong
• Is Part Of: Chemosphere. Volume 196(2018)
• Page Start: 78
• Page End: 86
• Publication Date: 2018-04
• Subjects: Enhanced biological phosphorus removal -- Glycerol -- Phosphorus accumulating organisms -- Polyhydroxyalkanoate -- Glycogen; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2017.12.167
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Enhanced biological phosphorus removal (EBPR) is a sustainable and promising technology for phosphorus removal from wastewater. The efficiency of this technology, however, is often discounted due to the insufficient carbon sources in influent. In this work, the effect of acetate to glycerol ratio on the EBPR performance was evaluated. The experimental results showed when the ratio of acetate to glycerol decreased from 100/0% to 50/50%, the EBPR efficiency increased from 90.2% to 96.2%. Further decrease of acetate to glycerol ratio to 0/100% decreased the efficiency of EBPR to 30.5%. Fluorescence in situ hybridization analysis demonstrated appropriate increase of glycerol benefited to increase the relative abundance of phosphate accumulating organisms. Further investigation revealed the proper addition of glycerol increased the amount of polyhydroxyalkanoates synthesis, and then produced sufficient energy for oxic luxury phosphorus in the subsequent oxic phase. Highlights: Effect of acetate to glycerol ratio on the EBPR performance was evaluated. The optimal ratio of acetate to glycerol for EBPR was 50/50%. The underlying mechanism glycerol enhanced the capability of EBPR was investigated. The appropriate addition of glycerol increased PHA synthesis.