Studies on Scenedesmus actus growth. I. Effect of autotrophic and mixotrophic conditions on the growth of scenedesmus acutus

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260240605· OSTI ID:6742479

Shamala, T R; Drawert, F; Leupold, G

Among sugars, glucose and mannose were found to be the most suitable substrates for mixotrophic growth, uptake of galactose and its influence on growth was negligible, and sucrose and fructose occupied intermediary positions. The optimum temperature for sugar uptake was 30 degrees C both under light and in darkness. Enhancement in the photosynthetic oxygen-evolution rate, based on the utilization of substrates, was foremost in the presence of glucose, followed by mannose, sucrose, and fructose. Industrial by-products such as sugarcane molasses also were utilized to increase the algal growth under mixotrophic conditions. A maximum yield in biomass was obtained subsequent to the combined supply of sugarcane molasses with carbon dioxide to indoor as well as outdoor mixotrophic cultures. Doubling the carbon dioxide supply alone above a certain level, under autotrophic and mixotrophic outdoor conditions, did not produce a pronounced increase in the algal growth rate. The results on autotrophic and mixotrophic growth variations are discussed in this article. (Refs. 36).

• Research Organization: Inst fuer Chemischtechnishe Analyse and Chemische Lebensmitteltechnologie der Technischen Univ Muenchen, 8050 Freising-Weihenstephan, Federal Republic of Germany
• OSTI ID: 6742479
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 24:6; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
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550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ALDEHYDES
ALGAE
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CONTROL
ELECTROMAGNETIC RADIATION
ELEMENTS
GLUCOSE
GROWTH
HEXOSES
MANNOSE
MICROORGANISMS
MOLASSES
MONOSACCHARIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLANTS
PRODUCTIVITY
RADIATIONS
SACCHARIDES
SCENEDESMUS
SUBSTRATES
TEMPERATURE CONTROL
UNICELLULAR ALGAE
VISIBLE RADIATION