THE BIOMASS PRODUCTION OF Skeletonema costatum (Greville) Cleve JEPARA ISOLATES IN SEMI-MASS CULTURE AND ITS UTILIZATION

Microalgae supports 95% ocean primary productivity. It makes people explores and utilizes microalgae as sources of food for human and animal, chemicals substance, medicines, hormones, enzymes, pigments, vitamins, fertilizers, waste treatment and biofuel. In this research, I use Skeletonema costatum...

Full description

Saved in:
Bibliographic Details
Main Author: Triastari Armanda, Dian
Format: Theses
Language:Indonesia
Online Access:https://digilib.itb.ac.id/gdl/view/34904
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Institut Teknologi Bandung
Language: Indonesia
Description
Summary:Microalgae supports 95% ocean primary productivity. It makes people explores and utilizes microalgae as sources of food for human and animal, chemicals substance, medicines, hormones, enzymes, pigments, vitamins, fertilizers, waste treatment and biofuel. In this research, I use Skeletonema costatum (Greville) Cleve, a kind of microalgae which isolated from Jepara seawater, which has higher instantaneous growth rate, bigger size from others and can be filtrated. As a result, it has economic values to be cultured and used as many purposes. There were three purposes of this research. The first is to know the best V:A ratio which optimize culture surface area to support the high biomass productivity. The second purpose is to determine chemical composition of the microalgae (lipid, protein, water, fiber, and ash content) and knowing the fatty acid composition of this microalgae. The third, is to analyze the prospects of the development of this microalgae to produce biomass for many purposes (especially for food, feed, and fuel). The treatments of the microalgaes cultures divide into three V:A culture ratio : 43.5 (treatment A), 39.8 (treatment B), and 84.0 (treatment C). The microalgae was cultured in modified Guillard’s f/2 medium (28 ppt in salinity and 7.0 of pH). Then the best V:A ratio for the highest biomass productivity could be determined. The proximate analysis was done for fat, protein, water, fiber, and ash content of the total biomass. The gas chromatography was done for analyze the fatty acids composition of the microalgae. The waste water quality of the culture also analyzed in this research. In the last, we analyze the economic estimation of the improvement potential of the microalgae to produce biomass for many purposes. The experiment results show, the best V:A ratio which support the highest biomass (95.84 g/m²) was 84.0 (treatment C). The rise of V:A ratio, surface area (A), and culture volume (V) will significantly increase the biomass production. vi The culture volume is the main factor which most influence the biomass production. Proximate analysis showed that S. costatum consist of 1.407 % (dry w.t.) of fat, 22.049% protein, 1.916% fiber, 8.011%, water and 58.362% ash. The fatty acid dominant in this algae are oleic acid, stearic acid, eicosapentaenoic acid, and palmitoleic acid. Based on the waste water analysis, the waste water of the culture were meets quality standards (Peraturan Kementerian Lingkungan Hidup Republik Indonesia No. 6/2007) and safe waste discharged into the environment. Based on the B/C ratio analysis and biochemistry analysis, S. costatum have economic values to be improved to produce biomass. S. costatum is better improved as feed for zooplankton, fish larvae, and crustacean larvae in aquaculture system. This S. costatum have not economic values to be used as the source of human food and as the source of biodiesel.