Effects of SO2 and NO on growth of Chlorella sp. KR-1.
Effects of the toxic compounds in flue gas, SOx and NOx, on growth of Chlorella sp. KR-1 have been determined. Although growth of KR-1 was suppressed by the toxic compounds, KR-1 exhibited excellent tolerances to SOx compared to other algal strains. When Chlorella KR-1 was cultured with the model gas containing 60 ppm SO2, the linear growth rate was 1.24 g/l day which is about 25% lower than that of the control culture aerated with the gas mixture containing no toxic compounds, SO2 and NO. KR-1 could grow even with the model gas containing 100 ppm SO2 and the linear growth rate of KR-1 in the culture was 0.78 g/l day. The period for lag phase was increased with increasing of SO2 concentration that also resulted in the decrease of the linear growth rate and the maximum cell concentration. Direct CO2 fixation by Chlorella KR-1 has been successfully done using actual flue gases from a liquified natural gas (LNG)- or diesel-fueled boiler. These results indicated that Chlorella KR-1 may be applied for direct CO2 fixation from actual flue gas.
Lee
Jin-Suk
JS
Biomass Team, KIER, Taedeok Science Town, Taejeon, Republic of Korea. bmjslee@sun330.kier.re.kr
Kim
Deog-Keun
DK
Lee
Jun-Pyo
JP
Park
Soon-Chul
SC
Koh
Jong-Ho
JH
Cho
Hye-Sung
HS
Kim
Seung-Wook
SW
D000393:Air Pollutants / Q000633:toxicity*; D002245:Carbon Dioxide / Q000378:metabolism*; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002708:Chlorella / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D004361:Drug Tolerance / Q000502:physiology; D009589:Nitrogen Oxides / Q000633:toxicity*; D013458:Sulfur Dioxide / Q000633:toxicity*
D000393:Air Pollutants; D009589:Nitrogen Oxides; D013458:Sulfur Dioxide; D002245:Carbon Dioxide