미세조류의 옥외배양을 위한 태양광의 효과적인 사용에 관한 연구

Title
미세조류의 옥외배양을 위한 태양광의 효과적인 사용에 관한 연구
Authors
김혜정
Keywords
미세조류의옥외배양을위한태양광의효과적인사용에관한연구
Issue Date
2012
Publisher
인하대학교
Abstract
As the price of conventional fossil fuels rises, renewable liquid fuels have become more attractive. Lipids from marine microalgae draw a lot of interests as a feedstock for biodiesel. However, price of biodiesel from microalgae is still expensive because of low productivity at outdoor cultivation, the high cost of equipment and downstream process. To solve these problems, removal of hindrance factor (high sunlight) at outdoor culture is efficient method than nutrient addition, because the former is more eco-friendly and cheaper than the latter. In this study, the efficient utilization of sunlight for outdoor culture of Dunaliella tertiolecta LB999 was assessed in terms of color film, UV cutting film and PBRs (photo-bioreactor) orientation. Color films were attached on the PBRs surfaces reduced high sunlight up to 20% and selectively transmitted red and blue photon. When compared light intensity per cell (qe value) and biomass productivity, red film was effective on biomass productivity. Red and blue wavelengths are used in photosynthesis. Also total FAME (fatty acid methyl acid) contents increased at least 23%. UV cutting film reduced high sunlight up to 20% and blocking UV and IR radiation. Overall, biomass productivity and total FAME contents increased with attached UV cutting film. Then UV cutting film and PBRs orientation effect was applied to 120 L PBRs. PBRs orientation can give the same effect as the film. As a result east orientation growth rate was high than south. South orientation receives high sunlight during the short time. UV cutting film was more effective at low cell dense of culture. It was demonstrated that the photosynthetic efficiency of microalgae cultures can be greatly improved by photo-bioreactors orientation at outdoor. Supplement of specific wavelength and removing harmful irradiation such as UV and IR radiation can be considered to be efficient tool to improve microalgal biomass productivity and lipid as a feedstock of biodiesel.
Description
CONTENTS CONTENTS 4 LIST OF FIGURES 6 LIST OF TABLES 8 ABSTRACT 9 1. INTRODUCTION 11 2. LITERATURE REVIEW 13 2.1 The necessity for bio-diesel from microalgae 13 2.1.1 Advantage of microalgae 13 2.1.2 Problems using microalgae 15 2.2 Biodiesel from microalgae 17 2.2.1 Biodiesel 17 2.2.2 Fatty acid composition of biodiesel 19 2.2.3 Potential of microalgal biodiesel 22 2.3 Why high sunlight is harmful? 23 2.3.1 High sunlight effect 23 2.3.2 UV and IR radiation effect 25 3. MATERIALS AND METHODS 26 3.1 Strain and culture conditions 26 3.2 Seed culture and culture condition 27 3.3 Bubble column photobioreactor 28 3.4 Light sources and light intensity measurement 28 3.5 Measurement of culture 28 4. RESUNTS AND DISCUSSION 32 4.1 High sunlight effect to cell growth 33 4.1.1 Outdoor cultivation problems 31 4.1.2 The method for solving problems 34 4.2 Effect of specific wavelength 35 4.2.1 Color film effect of biomass productivity 35 4.
URI
http://dspace.inha.ac.kr/handle/10505/23643
Appears in Collections:
College of Natural Science(자연과학대학) > Ocean Sciences (해양과학) > Theses(해양과학 석박사 학위논문)
Files in This Item:
24724.pdfDownload

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse