Study on the formation process and mechanism of aerobic granular sludge in the Sequencing Batch Biofilter Granular Reactor

Author:

Lin Ling1ORCID,Chen Shuangshuang1,Hou Yi2,Lei Lirong1ORCID

Affiliation:

1. hua nan li gong da xue: South China University of Technology

2. huanan nongye daxue: South China Agricultural University

Abstract

Abstract SBBGR is a promising wastewater treatment technology because of its low sludge yield and good toxicity tolerance. However, little attention has been paid to the formation process of AGS in SBBGR and the mechanism of formation. In this study, aerobic granular sludge with good performance was successfully cultivated around day 40 by using synthetic wastewater as feed: the mixed liquid suspended solids and mixed liquor volatile suspended solids raised from 3.85 g/L and 1.85 g/L to 31.38 g/L and 24.74 g/L respectively, and the COD, TN, and TP removal efficiencies were respectively 91.21%, 84.99%, and 58.14%. The experimental results showed that Amoebacteria and Bacteroides phylum played an important role in the formation of aerobic granular sludge, filamentous bacteria act as the three-dimensional skeleton, surrounded by filling bacilli and rod-shaped bacteria, and PN plays a dominant role in promoting granulation during the culture process.

Publisher

Research Square Platform LLC

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