Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale

Tejido-Nuñez, Yaiza; Aymerich, Enrique; Sancho, Luis; Refardt, Dominik

doi:10.1016/j.algal.2020.101940

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-20075

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale
Authors:	Tejido-Nuñez, Yaiza Aymerich, Enrique Sancho, Luis Refardt, Dominik
et. al:	No
DOI:	10.1016/j.algal.2020.101940 10.21256/zhaw-20075
Published in:	Algal Research
Volume(Issue):	49
Issue:	101940
Issue Date:	Aug-2020
Publisher / Ed. Institution:	Elsevier
ISSN:	2211-9264
Language:	English
Subjects:	Aquaculture; Nutrients; Protozoa; Water treatment; Chlorella vulgaris; Tetradesmus obliquus
Subject (DDC):	570: Biology 630: Agriculture
Abstract:	Microalgae biotechnology is of increasing importance and a central application concerns the treatment of wastewater. Here, its implementation in a recirculating aquaculture system (RAS) to lower the discharge of wastewater is studied. To better cope with external variations in culture conditions, a co-cultivation of two species of microalgae, Chlorella vulgaris and Tetradesmus obliquus, was used to obtain a more reliable and robust culture and was compared to monocultures. This approach was tested using RAS water both under sterile and non-sterile conditions at laboratory scale and then compared to a co-culture at pilot-scale in an open thin-layer photobioreactor. Performance of cultures was tested in terms of microalgae growth and nutrient removal efficiency. Furthermore, to better understand the interaction between environmental variables and each microalgae species, their relative frequencies in co-cultures as well as the presence of protozoa and bacteria were monitored. All growth experiments were carried out successfully and, unlike in a previous study, no crashes were observed. However, shifts in species frequency in co-cultures indicated that the two species were differentially affected by cultivation conditions. Despite nutrient limitation, the pilot-scale cultivation had a high productivity (13.3 g m−2 d−1) and final dry weight (11.1 g l−1) after 29 days and demonstrated its suitability for RAS water treatment.
Further description:	- Successful co-cultivation of Chlorella vulgaris and Tetradesmus obliquus - Stable cultivation despite presence of protozoa - Shifts in species frequency in co-culture likely caused by protozoa - Pilot-scale cultivation reached a final dry weight of 11.1 g l−1 - Maximum productivity at pilot-scale was 13.3 g m−2 d−1
URI:	https://digitalcollection.zhaw.ch/handle/11475/20075
Fulltext version:	Accepted version
License (according to publishing contract):	CC BY-NC-ND 4.0: Attribution - Non commercial - No derivatives 4.0 International
Restricted until:	2022-05-19
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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Tejido-Nuñez, Y., Aymerich, E., Sancho, L., & Refardt, D. (2020). Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale. Algal Research, 49(101940). https://doi.org/10.1016/j.algal.2020.101940

Tejido-Nuñez, Y. et al. (2020) ‘Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale’, Algal Research, 49(101940). Available at: https://doi.org/10.1016/j.algal.2020.101940.

Y. Tejido-Nuñez, E. Aymerich, L. Sancho, and D. Refardt, “Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale,” Algal Research, vol. 49, no. 101940, Aug. 2020, doi: 10.1016/j.algal.2020.101940.

TEJIDO-NUÑEZ, Yaiza, Enrique AYMERICH, Luis SANCHO und Dominik REFARDT, 2020. Co-cultivation of microalgae in aquaculture water : interactions, growth and nutrient removal efficiency at laboratory- and pilot-scale. Algal Research. August 2020. Bd. 49, Nr. 101940. DOI 10.1016/j.algal.2020.101940

Tejido-Nuñez, Yaiza, Enrique Aymerich, Luis Sancho, and Dominik Refardt. 2020. “Co-Cultivation of Microalgae in Aquaculture Water : Interactions, Growth and Nutrient Removal Efficiency at Laboratory- and Pilot-Scale.” Algal Research 49 (101940). https://doi.org/10.1016/j.algal.2020.101940.

Tejido-Nuñez, Yaiza, et al. “Co-Cultivation of Microalgae in Aquaculture Water : Interactions, Growth and Nutrient Removal Efficiency at Laboratory- and Pilot-Scale.” Algal Research, vol. 49, no. 101940, Aug. 2020, https://doi.org/10.1016/j.algal.2020.101940.