A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures

Pulgarin, Adrian; Giannakis, Stefanos; Pulgarin, César; Ludwig, Christian; Refardt, Dominik

doi:10.1016/j.apcatb.2020.118615

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures
Authors:	Pulgarin, Adrian Giannakis, Stefanos Pulgarin, César Ludwig, Christian Refardt, Dominik
et. al:	No
DOI:	10.1016/j.apcatb.2020.118615
Published in:	Applied Catalysis B: Environmental
Volume(Issue):	265
Issue:	118615
Issue Date:	8-Jan-2020
Publisher / Ed. Institution:	Elsevier
ISSN:	0926-3373
Language:	English
Subjects:	Microalgae cultivation; Contamination; Photo-Fenton; Disinfection
Subject (DDC):	570: Biology
Abstract:	This study reports the first attempt of a citrate-modified photo-Fenton (PF) application at near-neutral pH (7.5 to 8.5, tap water) to disinfect Escherichia coli (as model bacterium), in Chlorella vulgaris cultures. The conditions are aimed towards bacterial inactivation, while minimizing the detrimental effect on microalgae viability. The presence of microalgae accelerates H2O2 consumption and may affect bacterial disinfection due to faster H2O2 depletion. Supplementation of citric acid before PF improved the inactivation efficacy by 1.34 to 1.96 logU, alongside with a notably lower microalgae inactivation. Citric acid also considerably increased the lifetime of dissolved iron and prevented aggregation of microalgae, which was caused by Fe2+ addition. While these aggregates do not impact the already short lifetime of dissolved iron, they impede the citrate-favored homogeneous process that mainly inactivates E. coli. Finally, an integrated mechanism for C. vulgaris inactivation is suggested and compared with the one of E. coli.
URI:	https://digitalcollection.zhaw.ch/handle/11475/19403
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	Life Sciences and Facility Management
Organisational Unit:	Institute of Natural Resource Sciences (IUNR)
Published as part of the ZHAW project:	Biogas2Algae
Appears in collections:	Publikationen Life Sciences und Facility Management

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Pulgarin, A., Giannakis, S., Pulgarin, C., Ludwig, C., & Refardt, D. (2020). A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures. Applied Catalysis B: Environmental, 265(118615). https://doi.org/10.1016/j.apcatb.2020.118615

Pulgarin, A. et al. (2020) ‘A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures’, Applied Catalysis B: Environmental, 265(118615). Available at: https://doi.org/10.1016/j.apcatb.2020.118615.

A. Pulgarin, S. Giannakis, C. Pulgarin, C. Ludwig, and D. Refardt, “A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures,” Applied Catalysis B: Environmental, vol. 265, no. 118615, Jan. 2020, doi: 10.1016/j.apcatb.2020.118615.

PULGARIN, Adrian, Stefanos GIANNAKIS, César PULGARIN, Christian LUDWIG und Dominik REFARDT, 2020. A novel proposition for a citrate-modified photo-Fenton process against bacterial contamination of microalgae cultures. Applied Catalysis B: Environmental. 8 Januar 2020. Bd. 265, Nr. 118615. DOI 10.1016/j.apcatb.2020.118615

Pulgarin, Adrian, Stefanos Giannakis, César Pulgarin, Christian Ludwig, and Dominik Refardt. 2020. “A Novel Proposition for a Citrate-Modified Photo-Fenton Process against Bacterial Contamination of Microalgae Cultures.” Applied Catalysis B: Environmental 265 (118615). https://doi.org/10.1016/j.apcatb.2020.118615.

Pulgarin, Adrian, et al. “A Novel Proposition for a Citrate-Modified Photo-Fenton Process against Bacterial Contamination of Microalgae Cultures.” Applied Catalysis B: Environmental, vol. 265, no. 118615, Jan. 2020, https://doi.org/10.1016/j.apcatb.2020.118615.