In this study, the effect of hydraulic retention time (HRT) on the performance of aerobic granular sludge (AGS) treating swine wastewater (SW) in sequencing batch reactor (SBR) was investigated. The HRT was set at 4.8, 6, 8, 12, and 16 h and performed in five parallel aerobic granular sludge sequence batch reactors (AGSBRs), respectively. The results showed that sedimentation performance and biomass concentration were improved by decreasing the HRT from 16 to 8 h. However, when further decreasing HRT from 8 to 4.8 h, the AGS performance became worse. The AGS process with HRT of 8 h exhibited high pollutant removal efficiency, and an abundant microbial community and a stable microbial community structure were observed. High-throughput 16S rRNA analysis revealed that there were significant differences between the microorganisms in AGS samples with HRT of 8 h at the phylum level and that the dominant microbes changed as the process proceeded. At the genus level, the species and relative abundance of microorganisms gradually evolved for AGS stability in all cases.

中文翻译：

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水力停留时间对好氧颗粒污泥排序间歇反应器处理猪废水的影响。

在这项研究中，研究了水力停留时间（HRT）对好氧颗粒污泥（AGS）处理顺序分批反应器（SBR）中猪废水（SW）性能的影响。HRT设置为4.8、6、8、12和16 h，分别在五个平行的好氧颗粒污泥顺序批处理反应器（AGSBR）中进行。结果表明，通过将HRT从16h降低到8h可以改善沉积性能和生物量浓度。但是，当HRT从8小时进一步降低到4.8小时时，AGS性能会变差。HRT为8 h的AGS工艺去除污染物的效率高，微生物群落丰富，微生物群落结构稳定。高通量16S rRNA分析表明，在门水平HRT为8 h的AGS样品中，微生物之间存在显着差异，并且优势微生物随着过程的进行而发生变化。在属水平上，在所有情况下，为了AGS的稳定性，微生物的种类和相对丰富度都在逐步演变。