Analysis of Three-dimensional Fluorescence Characteristics of Extracellular Polymeric Substances at Internal Points in MPR at Low Temperature. Issue 1 (March 2021)

• Record Type: Journal Article
• Authors: Tian, Xi; Lv, Yanhong; Liu, Ying; Li, Xuejiao; Ren, Zhiming; Liu, Xin; Bian, Dejun
• Is Part Of: IOP conference series. Volume 706:Issue 1(2021)
• Publication Date: 2021-03
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/706/1/012027
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Through three-dimension excitation emission matrix (EEM) fluorescence spectroscopy and fluorescence regional integration (FRI), the content and composition changes of extracellular polymeric substances (EPS) in different regions in the Micro-Pressure Inner-Loop Bioreactor (MPR) were analyzed, and the law of EPS in spatial points was found. The analysis shows that the high excitation wavelength tryptophan-like Peak T1 and the low excitation wavelength tyrosine-like Peak B appear in the spectra of tightly-bounded EPS (TB-EPS) and loosely-bounded EPS (LB-EPS) at different points. The content of protein substances in EPS is relatively high. In addition, the unique flow pattern in the reactor forms a multi-oxygen zone, which causes the total amount of EPS and the content of various organic substances, especially protein substances, to increase from the center of the reactor to the outside.