Ionic response of algal-bacterial granular sludge system during biological phosphorus removal from wastewater

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Jixiang Wang
  • Zhongfang Lei
  • Caixing Tian
  • Sen Liu
  • Qian Wang
  • Kazuya Shimizu
  • Zhenya Zhang
  • Yasuhisa Adachi

Detail(s)

Original languageEnglish
Article number128534
Journal / PublicationChemosphere
Volume264
Online published5 Oct 2020
Publication statusPublished - Feb 2021
Externally publishedYes

Abstract

Biological phosphorus removal (BPR) from wastewater can be generally realized through alternative non-aeration and aeration operation to create anaerobic and aerobic conditions respectively for P release and uptake/accumulation by polyphosphate accumulating organisms (PAOs), with P removal finally achieved by controlled discharge of P-rich sludge. In this study, the response of algal-bacterial aerobic granular sludge (AB-AGS) during BPR to main ions including Ac (acetate), Cl, SO42−, NH4+, K+, Mg2+, Ca2+ and Na+ in wastewater was investigated with conventional bacterial AGS (B-AGS) as control and acetate as the sole carbon source. Results show that BPR process mainly involved the changes of Ac, K+, Mg2+, and Ca2+ rather than Cl, SO42−, NH4+ and Na+. The mole ratio of ΔP/ΔAc kept almost unchanged during the non-aeration (P release) phase in both B-AGS and AB-AGS systems (ΔPB-AGS/ΔAcB-AGS > ΔPAB-AGS/ΔAcAB-AGS), and it was negatively influenced by the light in AB-AGS systems, in which 62% of acetate was not utilized for P release at the high illuminance of 81 k lux. During the entire non-aeration/aeration period, both ΔK/ΔP and ΔMg/ΔP remained constant, while ΔKAB-AGS/ΔPAB-AGS > ΔKB-AGS/ΔPB-AGS and ΔMgAB-AGS/ΔPAB-AGS ≈ ΔMgB-AGS/ΔPB-AGS. The presence of algae seemed not beneficial for PAOs to remove P, while more K+ and P uptake by algae in AB-AGS suggest its great potential for manufacturing biofertilizer.

Research Area(s)

  • Acetate, Algal-bacterial aerobic granular sludge, Anion, Cation, Phosphorus release

Citation Format(s)

Ionic response of algal-bacterial granular sludge system during biological phosphorus removal from wastewater. / Wang, Jixiang; Lei, Zhongfang; Tian, Caixing et al.
In: Chemosphere, Vol. 264, 128534, 02.2021.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review