Wastewater COD characterization: RBCOD and SBCOD characterization analysis methods

Jingbing Zhang; Yuting Shao; Guohua Liu; Lu Qi; Hongchen Wang; Xianglong Xu; Shuai Liu

doi:10.1038/s41598-020-80700-8

Scientific Reports (Jan 2021)

Wastewater COD characterization: RBCOD and SBCOD characterization analysis methods

Jingbing Zhang,
Yuting Shao,
Guohua Liu,
Lu Qi,
Hongchen Wang,
Xianglong Xu,
Shuai Liu

Affiliations

Jingbing Zhang: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Yuting Shao: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Guohua Liu: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Lu Qi: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Hongchen Wang: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Xianglong Xu: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China
Shuai Liu: Research Center for Low Carbon Technology of Water Environment, School of Environment and Natural Resource, Renmin University of China

DOI: https://doi.org/10.1038/s41598-020-80700-8
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 10

Abstract

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Abstract Wastewater characterization is the basis for process design and operation optimization of wastewater treatment plants (WWTPs). In this work, a comprehensive study of the respirometry method has been performed to evaluate the biodegradable organic matters of wastewater. First, the optimal initial substrate to biomass ratio (S0/X0) was confirmed. Second, under the optimal S0/X0, the degradation curves of wastewater carbon oxygen demand (COD) components rapidly biodegradable COD (RBCOD) and slowly biodegradable COD (SBCOD) were obtained. Third, the Mann–Kendall test was performed to confirm the time point (t2) when endogenous respiration levels were reached, and the hydrolysis model was used to determine the time point (t1) of the SBCOD degradation stage. Considering the results, an adequate wastewater COD characterization method for RBCOD and SBCOD has been proposed. This study provides strong support to carry out effective and feasible process design, process diagnosis and optimization capability, can help achieve refined and stable operational management of WWTPs.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

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