Insight into aerobic phosphorus removal from wastewater in algal-bacterial aerobic granular sludge system

被引：34
作者：
Li, Zejiao
Wang, Jixiang
Chen, Xingyu
Lei, Zhongfang
Yuan, Tian
Shimizu, Kazuya
Zhang, Zhenya
Lee, Duu-Jong
机构：
[1] Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Ibaraki, Tsukuba
[2] Department of Chemical Engineering, National Taiwan University, Taipei
[3] Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tang
来源：
BIORESOURCE TECHNOLOGY | 2022年 / 352卷
关键词：
Algal-bacterial aerobic granular sludge; Biological phosphorus removal; Rate-controlling process; Calcium phosphate precipitation; Polyphosphate-accumulating organisms; ACCUMULATING ORGANISMS; MICROBIAL GRANULES; NUTRIENTS REMOVAL; AQUEOUS-SOLUTION; ADSORPTION; NITROGEN; GROWTH; OXYGEN;
D O I：
10.1016/j.biortech.2022.127104
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study aimed to figure out the main contributors to aerobic phosphorus (P) removal in the algal-bacterial aerobic granular sludge (AGS)-based wastewater treatment system. Kinetics study showed that aerobic P removal was controlled by macropore (contributing to 64-75% P removal) and micropore diffusion, and the different light intensity (0, 4.0, 12.3, and 24.4 klux) didn't exert significant (p > 0.05) influence on P removal. On the other hand, the increasing light intensity did promote microalgae metabolism, leading to the elevated wastewater pH (8.0-9.8). The resultant pH increase had a strongly negative relationship (R-2 = 0.9723) with P uptake by polyphosphate-accumulating organisms, while promoted chemical Ca-P precipitation at a molar Ca/P ratio of 1.05. Results from this work could provide an in-depth understanding of microalgae-bacteria symbiotic interaction, which is helpful to better design and operate the algal-bacterial AGS systems.
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页数：10
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