Hydrolysis of particulate organic matter from municipal wastewater under aerobic treatment

被引：19

作者：

Alvarado, Alondra ^{[1
]}

West, Stephanie ^{[1
]}

Abbt-Braun, Gudrun ^{[1
]}

Horn, Harald ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Engler Bunte Inst, Water Chem & Water Technol, Engler Bunte Ring 9, D-76131 Karlsruhe, Germany

来源：

CHEMOSPHERE | 2021年 / 263卷

关键词：

Hydrolysis; Particulate organic matter; Size exclusion chromatography; Confocal laser scanning microscopy; Slowly biodegradable matter; Wastewater particles; SIZE-EXCLUSION CHROMATOGRAPHY; ACTIVATED-SLUDGE; MOLECULAR-WEIGHT; CARBON DETECTION; PARTICLE-SIZE; KINETICS; MODEL; QUANTIFICATION; BIODEGRADATION; FRACTIONATION;

D O I：

10.1016/j.chemosphere.2020.128329

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Hydrolysis of particulate organic matter is known to be a limiting step in biological wastewater treatment. In this work, we used an experimental set-up, which allowed the parallel observation of hydrolysis product formation on the one side and utilization on the other side. The hydrolysis products are characterized by using size exclusion chromatography with online carbon and UV (254 nm) detection. The used particles (size: 25-250 mu m) originated from municipal wastewater. Here, it is shown that the concentration of high molecular weight organic matter increases over the first three days. During this time, bacteria grow and produce the required enzymes to perform the further degradation. The oxygen utilization rate (OUR) on the other side continuously develops, confirming the presence of easily biodegradable organic matter. In parallel, the amount of bacteria and extracellular polymeric substances (EPS) undergoes a certain dynamics, which was visualized by using confocal laser scanning images. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：9

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