Changes in fatty acid composition of Chlorella vulgaris by hypochlorous acid.
Hypochlorous acid treatment of a microalga, Chlorella vulgaris, was investigated to improve the quality of microalgal lipid and to obtain high biodiesel-conversion yield. Because chlorophyll deactivates the catalyst for biodiesel conversion, its removal in the lipid-extraction step enhances biodiesel productivity. When microalgae contacted the hypochlorous acid, chlorophyll was removed, and resultant changes in fatty acid composition of microalgal lipid were observed. The lipid-extraction yield after activated clay treatment was 32.7 mg lipid/g cell; after NaClO treatment at 0.8% available chlorine concentration, it was 95.2 mg lipid/g cell; and after NaCl electrolysis treatment at the 1 g/L cell concentration, it was 102.4 mg lipid/g cell. While the contents of all of the unsaturated fatty acids except oleic acid, in the microalgal lipid, decreased as the result of NaClO treatment, the contents of all of the unsaturated fatty acids including oleic acid decreased as the result of NaCl electrolysis treatment.
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea. Electronic address: yearn@kier.re.kr.
Ji-Yeon
JY
Park
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
Sun-A
SA
Choi
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
Min-Ji
MJ
Jeong
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
Bora
B
Nam
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
You-Kwan
YK
Oh
Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea.
Jin-Suk
JS
Lee
D000538:Aluminum Silicates; D048408:Chlorella vulgaris / Q000187:drug effects / Q000378:metabolism*; D002734:Chlorophyll / Q000378:metabolism; D000077215:Clay; D004572:Electrolysis; D005227:Fatty Acids / Q000378:metabolism*; D006997:Hypochlorous Acid / Q000494:pharmacology*; D008055:Lipids / Q000302:isolation & purification; D012965:Sodium Chloride / Q000494:pharmacology
D000538:Aluminum Silicates; D005227:Fatty Acids; D008055:Lipids; D002734:Chlorophyll; D012965:Sodium Chloride; D006997:Hypochlorous Acid; D000077215:Clay
Biodiesel; Chlorella vulgaris; Chlorophyll removal; Hypochlorous acid; Wet lipid extraction