Hydrodynamic behavior and start-up performance of a periodic anaerobic baffled reactor in an “every second” switching manner treating traditional Chinese medicine wastewater

Frontiers in Microbiology

Microbiology

Xiaolei Liu¹  Nanqi Ren²  Yixing Yuan² 

[1] School of Water Conservancy and Environment Engineering, Changchun Institute of Technology, Changchun, China;State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, Harbin, China;State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, Harbin, China;

关键词: periodic anaerobic baffled reactor;    switching manner;    traditional Chinese;    computational fluid dynamics;    residence time distribution;    industrial wastewater treatment;   

DOI  :  10.3389/fmicb.2023.1282906

 received in 2023-08-25, accepted in 2023-09-29,  发布年份 2023

来源: Frontiers

【 摘 要 】

Most studies focus on the “clockwise sequential” switching manner for a four-compartment periodic anaerobic baffled reactor (PABR), while the exploration of the “every second” option on the feasibility for real industrial wastewater treatment is rarely reported. Hence, a PABR-treating traditional Chinese medicine wastewater was run continuously in “every second” switching manner with both switching period T and hydraulic residence time of 48 h. Satisfactory start-up performance was achieved during the operation of a climbing average organic load rate at approximately 1, 2, 4, and 6 kg chemical oxygen demand (COD) m−3 d−1 for 12, 24, 24, and 6 days, respectively. The average COD removal was 87.20% after the second lifting of OLR and 89.98% after the third one. Denaturing gradient gel electrophoresis and its cluster analysis showed that the microbial communities in each compartment adapted their structure in response to the periodically changing micro-ecology conditions. Moreover, the residence time distribution test with tap water in the clean PABR was carried out in experiments and computational fluid dynamics (CFD) simulation, both of which were in good agreement. The CFD model output visualized the flow velocity field and hydrodynamic-mass transport inside the PABR. Optimization of operation pattern in PABR including switching manner and frequency depended on both the type of waste being treated and the flexibility of biomass to periodically changing micro-ecology conditions.

【 授权许可】

Unknown   
Copyright © 2023 Liu, Yuan and Ren.

【 图 表 】

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