Photosynthetic performance of Chlorella vulgaris R117 mass culture is moderated by diurnal oxygen gradients in an outdoor thin layer cascade

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F21%3A00541930" target="_blank" >RIV/61388971:_____/21:00541930 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12220/21:43903325 RIV/60076658:12310/21:43903325

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2211926420310444" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2211926420310444</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.algal.2020.102176" target="_blank" >10.1016/j.algal.2020.102176</a>

Result language

angličtina

Original language name

Photosynthetic performance of Chlorella vulgaris R117 mass culture is moderated by diurnal oxygen gradients in an outdoor thin layer cascade

Original language description

Dissolved oxygen concentration is a critical point for microalgae in large scale cultivation systems. Highly productive cultures inevitably generate a build-up of oxygen gradients along the reactor which can affect photosynthetic performance. In this study, a fast-growing strain of Chlorella vulgaris R117 was cultured outdoors in a thin-layer cascade during a one-week trial reaching a biomass productivity of 4 g DW L-1 d(-1) (27 g DW m(-2) d(-1)). High photosynthetic activity led to oxygen oversaturation of up to 400% in some parts along the culture units at midday. The aim was to examine the effect of high dissolved oxygen concentration on diurnal changes in the photosynthetic performance and growth of the Chlorella culture using multi-technique approach. Photosynthetic activity of Chlorella R117 culture was estimated in situ and ex situ using oxygen production and in vivo Chl a fluorescence measurements, which showed good correlation. The rates of electron transport and of oxygen production were related, but the values of the mu mol(electrons)/mu molO(2) ratio was higher than predicted, suggesting the probable involvement of electron and oxygen consuming processes such as photorespiration and Mehler reaction. These processes probably function as photoprotective mechanisms, since no photodamage was observed in the Chlorella R-117 cultures. Depression (down-regulation) of photosynthetic activity due to the exposition to high dissolved oxygen concentration along the cascade area over time was observed. The usefulness of on-line measurements was demonstrated to obtain immediate and in-situ information on the physiological status of the culture. This data can be used in models of operation control for large-scale microalgae production units.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10606 - Microbiology

Project

<a href="/en/project/LO1416" target="_blank" >LO1416: Algatech plus</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Algal Research-Biomass Biofuels and Bioproducts

ISSN

2211-9264

e-ISSN

2211-9264

Volume of the periodical

54

Issue of the periodical within the volume

APR 21

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

102176

UT code for WoS article

000632338300016

EID of the result in the Scopus database

2-s2.0-85099225640