Palm oil mill effluent (POME) cultured marine microalgae as supplementary diet for rotifer culture

Charles Santhanaraju Vairappan, and Yen, Ang May (2008) Palm oil mill effluent (POME) cultured marine microalgae as supplementary diet for rotifer culture. Journal of Applied Phycology, 20 (5). pp. 603-608. ISSN 0921-8971

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Official URL: http://dx.doi.org/10.1007/s10811-007-9305-1

Abstract

Malaysia is the world's leading producer of palm oil products that contribute US$ 7.5 billion in export revenues. Like any other agro-based industries, it generates waste that could be utilized as a source of organic nutrients for microalgae culture. Present investigation delves upon Isochrysis sp. culture in POME modified medium and its utilization as a supplement to Nanochloropsis sp. in rotifer cultures. The culture conditions were optimized using a 1 L photobioreactor (Temp: 23A degrees C, illumination: 180 aEuro parts per thousand 200 mu mol photons m(-2)s(-1), n = 6) and scaled up to 10 L outdoor system (Temp: 26-29A degrees C, illumination: 50 aEuro parts per thousand 180 mu mol photons m(-2)s(-1), n = 3). Algal growth rate in photobioreactor (mu = 0.0363 h(-1)) was 55% higher compared to outdoor culture (mu = 0.0163 h(-1)), but biomass production was 1.3 times higher in outdoor culture (Outdoor = 91.7 mg m(-2)d(-1); Photobioreactor = 69 mg m(-2)d(-1)). Outdoor culture produced 18% higher lipid; while total fatty acids (FA) was not significantly affected by the change in culture systems as both cultures yield almost similar concentrations of fatty acids per gram of sample (photobioreactor = 119.17 mg g(-1); outdoor culture = 104.50 mg g(-1)); however, outdoor cultured Isochrysis sp. had 26% more polyunsaturated fatty acids (PUFAs). Rotifers cultured in Isochrysis sp./ Nanochloropsis sp. (1:1, v/v) mixture gave similar growth rate as 100% Nanochoropsis sp. culture (mu = 0.40 d(-1)), but had 45% higher counts of rotifers with eggs (t = 7, maximum). The Isochrysis sp. culture successfully lowered the nitrate (46%) and orthophosphate (83%) during outdoor culture.

Item Type:Article
Uncontrolled Keywords:Biotechnology and applied microbiology, Marine and freshwater biology
Subjects:?? QK504-(638) ??
Divisions:SCHOOL > Institute for Tropical Biology and Conservation
ID Code:1389
Deposited By:IR Admin
Deposited On:22 Aug 2011 16:16
Last Modified:17 Feb 2015 15:04

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