Universität zu Köln

Naumann, Thomas, Cebi, Zehra, Podola, Bjoern and Melkonian, Michael (2013). Growing microalgae as aquaculture feeds on twin-layers: a novel solid-state photobioreactor. J. Appl. Phycol., 25 (5). S. 1413 - 1421. DORDRECHT: SPRINGER. ISSN 0921-8971

Full text not available from this repository.

Abstract

Four strains of marine microalgae commonly used as live feeds in hatcheries (Isochrysis sp. T.ISO, Tetraselmis suecica, Phaeodactylum tricornutum, Nannochloropsis sp.) were grown in a novel solid-state photobioreactor, the twin-layer system. Microalgae were immobilized by self adhesion to vertically oriented twin-layer modules which consisted of two different types of ultrathin layers, a macroporous source layer (glass fiber nonwoven) through which the culture medium was transported by gravity flow, and a microporous substrate layer (plain printing paper) which carried the algae on both surfaces of the source layer. This simple open cultivation system effectively separated the immobilized microalgae from the bulk of the growth medium and permitted prolonged cultivation of microalgae with average biomass yields of 10-15 g dry weight m(-2) growth area after 14-25 days of cultivation. Algal biomass was harvested as fresh weight (with 72-84 % water content) without the need to pre-concentrate algae. No aeration or external CO2 supply was necessary, and due to the microporous substrate layer, no eukaryotic contaminations were observed during the experiment. All experiments were conducted in Germany under greenhouse conditions with natural sunlight. Small-scale growth experiments performed under the same conditions revealed that growth over most of the experimental period (24 days) was linear in all tested algae with growth rates (dry weight per square meter growth area) determined to be 0.6 g m(-2) day(-1) (Isochrysis), 0.8 g m(-2) day(-1) (Nannochloropsis), 1.5 g m(-2) day(-1) (Tetraselmis), and 1.8 g m(-2) day(-1) (Phaeodactylum). Due to its cost-effective construction and with further optimisation of design and productivity at technical scales, the twin-layer system may provide an attractive alternative to methods traditionally used to cultivate live microalgae.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Naumann, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Cebi, Zehra UNSPECIFIED UNSPECIFIED UNSPECIFIED Podola, Bjoern UNSPECIFIED UNSPECIFIED UNSPECIFIED Melkonian, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-475196
DOI:	10.1007/s10811-012-9962-6
Journal or Publication Title:	J. Appl. Phycol.
Volume:	25
Number:	5
Page Range:	S. 1413 - 1421
Date:	2013
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	0921-8971
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language WASTE-WATER; HATCHERIES; SYSTEM; CULTIVATION; BIOFUELS; REMOVAL; GROWTH Multiple languages Biotechnology & Applied Microbiology; Marine & Freshwater Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47519