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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Zejiao Li
  • Jixiang Wang
  • Xingyu Chen
  • Zhongfang Lei
  • Tian Yuan
  • Kazuya Shimizu
  • Zhenya Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number127104
Journal / PublicationBioresource Technology
Volume352
Online published1 Apr 2022
Publication statusPublished - May 2022

Abstract

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 (R2 = 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.

Research Area(s)

  • Algal-bacterial aerobic granular sludge, Biological phosphorus removal, Calcium phosphate precipitation, Polyphosphate-accumulating organisms, Rate-controlling process

Citation Format(s)

Insight into aerobic phosphorus removal from wastewater in algal-bacterial aerobic granular sludge system. / Li, Zejiao; Wang, Jixiang; Chen, Xingyu; Lei, Zhongfang; Yuan, Tian; Shimizu, Kazuya; Zhang, Zhenya; Lee, Duu-Jong.

In: Bioresource Technology, Vol. 352, 127104, 05.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review