Algae granulation for nutrients uptake and algae harvesting during wastewater treatment

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

80 Scopus Citations
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Author(s)

  • Wei Cai
  • Ziwen Zhao
  • Dawei Li
  • Zhongfang Lei
  • Zhenya Zhang

Detail(s)

Original languageEnglish
Pages (from-to)55-59
Journal / PublicationChemosphere
Volume214
Online published19 Sept 2018
Publication statusPublished - Jan 2019
Externally publishedYes

Abstract

To overcome the high separation cost of microalgae, natural microalgae granulation was performed in open sequencing batch reactors (SBRs) by treating synthetic wastewater. After operation for 60 days, easily settled algae granules were obtained with an average size of 0.61 mm, sludge volume index (SVI) of 125 ml/g and settling velocity of 12.2 m/h. More extracellular polymeric substances (EPS) (∼252 mg/g-VSS) were detected to excrete with a higher proteins/polysaccharides (PN/PS) ratio (∼7) for the algae granules on day 60, which are beneficial for granulation. Meanwhile, the algae granules were found to have a higher phosphorus (P) content (33.4 mg-P/g-TSS) with higher P bioavailability (91.8%) when compared to the seed algae (20.4 mg-P/g-TSS). The obtained algae granules possess great potential for P recovery and reuse.

Research Area(s)

  • Algae granules, Extracellular polymeric substances (EPS), Phosphorus bioavailability, Wastewater treatment

Citation Format(s)

Algae granulation for nutrients uptake and algae harvesting during wastewater treatment. / Cai, Wei; Zhao, Ziwen; Li, Dawei et al.
In: Chemosphere, Vol. 214, 01.2019, p. 55-59.

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