Universität zu Köln

Schultze, Larissa K. P., Simon, Marie-Victoria, Li, Tong ORCID: 0000-0002-6943-0741, Langenbach, Dorothee, Podola, Bjoern and Melkonian, Michael (2015). High light and carbon dioxide optimize surface productivity in a Twin-Layer biofilm photobioreactor. Algal Res., 8. S. 37 - 45. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 2211-9264

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Abstract

Immobilized cultivation of microalgae recently received increasing attention avoiding some of the major drawbacks of suspension cultivation. Twin-Layer photobioreactors (TL-PBRs), a type of porous substrate bioreactor (PSBR), have proven to be an efficient cultivation system for microalgal biofilms. However, the TL-PBR had not yet been optimized with respect to light and CO2. The effect of light intensity up to 1486 mu mol m(-2) s(-1) as well as supplementary CO2 (0.12-5%) was investigated using the green alga Halochlorella rubescens as a model. With a combination of 1023 mu mol photons m(-2) s(-1) and a CO2 level of 3% a surface productivity of 31.2 g dry matter m(-2) d(-1) was obtained. Along with a standing crop of 205 g m(-2) growth area (1011 mu mol photons m(-2) s(-1) at atmospheric CO2 level) these values represent the highest biomass productivity and total biomass yield yet reported for a PSBR. This work, furthermore, demonstrates the successful transfer of laboratory scale data to a small prototype-scale greenhouse photobioreactor. With respect to an optimal Twin-Layer photobioreactor design, results suggest that the highest footprint productivities (similar to 50 g m(-2) d(-1) without supplementary CO2) can be obtained at high light dilution rates. In contrast, a scenario using high irradiances and supplementary CO2 might be favourable from an economic point of view. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schultze, Larissa K. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simon, Marie-Victoria UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Tong UNSPECIFIED orcid.org/0000-0002-6943-0741 UNSPECIFIED Langenbach, Dorothee UNSPECIFIED UNSPECIFIED UNSPECIFIED Podola, Bjoern UNSPECIFIED UNSPECIFIED UNSPECIFIED Melkonian, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-411518
DOI:	10.1016/j.algal.2015.01.007
Journal or Publication Title:	Algal Res.
Volume:	8
Page Range:	S. 37 - 45
Date:	2015
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	2211-9264
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MUNICIPAL WASTE-WATER; ATTACHED CULTIVATION; HAEMATOCOCCUS-PLUVIALIS; MICROALGAE; GROWTH; REMOVAL; INTENSITY; NUTRIENTS; NITROGEN; ALGAE Multiple languages Biotechnology & Applied Microbiology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41151