The effect of reactor H/D ratios on the cultivation of aerobic granular sludge

作     者：Zhao, Fengli Zhou, Shenjie 

作者机构：Shandong Univ Sch Mech Engn Jinan City 250061 Shandong Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF HYDROLOGY SCIENCE AND TECHNOLOGY》 (国际水文科学与技术杂志)

年 卷 期：2024年第18卷第2期

页      面：155-169页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

主　　题：aerobic granular sludge AGS H/D ratios computational fluid dynamics CFD flow patterns granular performance 

摘      要：Height to diameter ratios (H/D ratios) of the sequencing batch reactors (SBRs) are of great significance in the cultivation of the aerobic granular sludge (AGS). In this study, the gas-liquid two-phase flow patterns in the reactors with two different H/D ratios of 5 and 3 were simulated based on computational fluid dynamics (CFD). The results showed that higher H/D ratios of the reactors provided smaller liquid velocity and shear rate, but more small vortices and longer circulations compare with the lower H/D ratio reactor. Moreover, the cultivation of AGS in the two H/D ratio reactors was further investigated. It was found that reactors with higher H/D ratios can accelerate sludge granulation and retain more sludge than reactors with lower H/D ratios. However, the two reactors achieved the similar pollutant removal efficiency during the stable period, demonstrating that a high H/D ratio can enhance granulation but is not necessary for practical applications, which can reduce construction difficulties.