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Shi, W, Zhu, L, Chen, Q, Lu, J, Pan, G 
ORCID: https://orcid.org/0000-0003-0920-3018, Hu, L and Yi, Q,
2017.
Synergy of flocculation and flotation for microalgae harvesting using aluminium electrolysis.
Bioresource Technology, 233, pp. 127-133.
ISSN 0960-8524
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Abstract
Microalgae are often used as feedstock for renewable biofuel production and as pollutant up-takers for wastewater treatment; however, biomass harvesting still remains a challenge in field applications. In this study, electro-flocculation using aluminium electrolysis was tested as a method to collect Chlorella vulgaris. The electrolysis products were positively charged over a wide pH range below 9.5, which gave them a flocculation potential for negatively charged microalgae. As flocculants were in-situ generated and gradually released, microalgae flocs formed in a snowballing mode, resulting in the compaction of large flocs. When higher current density was applied, microalgae could be harvested more rapidly, although there was a trade-off between a higher energy use and more residual aluminium in the culture medium. Benefits of this flocculation method are two-fold: the phosphate decrease in post-harvesting could improve nutrient removal in microalgae based wastewater treatment, while the ammonium increase may favor microalgae recovery for medium recycling.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Bioresource Technology |
| Creators: | Shi, W., Zhu, L., Chen, Q., Lu, J., Pan, G., Hu, L. and Yi, Q. |
| Publisher: | Elsevier |
| Date: | 20 February 2017 |
| Volume: | 233 |
| ISSN: | 0960-8524 |
| Identifiers: | Number Type 10.1016/j.biortech.2017.02.084 DOI S0960852417302079 Publisher Item Identifier |
| Divisions: | Schools > School of Animal, Rural and Environmental Sciences |
| Record created by: | Jill Tomkinson |
| Date Added: | 14 Mar 2017 11:53 |
| Last Modified: | 20 Feb 2018 03:00 |
| URI: | https://irep.ntu.ac.uk/id/eprint/30376 |
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