Recovery and reuse of alginate in an immobilised algae reactor

Date published

2019-09-27

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Journal Title

Journal ISSN

Volume Title

Publisher

Taylor and Francis

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Type

Article

ISSN

0959-3330

Format

Citation

Murujew O, Whitton R, Kube M, et al., (2021) Recovery and reuse of alginate in an immobilised algae reactor. Environmental Technology, Volume 42, Issue 10, 2021, pp. 1521-1530

Abstract

The use of microalgae for nutrients removal from wastewater has attracted more attention in recent years. More specifically, immobilized systems where algae cells are entrapped in beads in a matrix of a polysaccharide such as alginate have shown a great potential for nutrients removal from wastewater to low levels with reduced retention times and hence smaller footprint. However, a significant operational cost in the up-scaling of alginate-immobilized algae reactors will be the gelling agent alginate. To reduce expenditure of this consumable a proof-of-concept is given for an alginate recycling method using sodium citrate as a dissolving agent. Using algae beads made from virgin and recycled alginate yielded comparable removal rates for both phosphorus and nitrogen compounds from wastewater. At labscale, an alginate recovery of approximately 70% can be achieved which would result in a net operational cost reduction of about 60%.

Description

Software Description

Software Language

Github

Keywords

Alginate, immobilized algae,, phosphorus removal, recovery, recycle

DOI

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Attribution-NonCommercial 4.0 International

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