Chlorella biomass production in annular photobioreactor using palm oil mill effluent (POME): effect of hydrodynamics and mass transfer irradiance aeration rate and POME concentration

Tan Cheng-Yau, . and Nik Meriam Nik Sulaiman, . and Loh Soh Kheang, . and Phang Siew-Moi, . Chlorella biomass production in annular photobioreactor using palm oil mill effluent (POME): effect of hydrodynamics and mass transfer irradiance aeration rate and POME concentration. pp. 496-509. ISSN 1511-2780

Palm oil mill effluent (POME) was used to culture Chlorella vulgaris UMACC001 in 5-litre artificially illuminated airlift annular photobioreactors. Hydrodynamic and mass transfer characteristics were investigated for spargers perforated with different pore diameters. Maximum volumetric mass transfer coefficient and gas hold-up were achieved using sparger with 1 mm pores. The sparger was later used in the three-factor growth studies i.e. irradiance aeration rate and POME concentration designated using five- level central composite design. Results showed the chlorophyll-a (Chl-a) content and specific growth rate () ranged from 0.26 to 25.40 mg litre-1 and 0 to 1.033 per day respectively. The response surface model concluded that increasing irradiance while maintaining the aeration rate and POME concentration indicates the light remained the limiting factor during experimentation. POME concentration and irradiance were found to significantly affect the Chl-a production whereas the aeration rate was responsible for the . The optimised biomass contained 22.0 wt of lipid of which 57.0 of the fatty acids was saturated 26.9 monounsaturated and 16.1 polyunsaturated. The predominant components i.e. palmitic acid (C16:0) myristic acid (C14:0) stearic acid (C18:0) and eruric acid (C22:1) indicated that the biomass is a suitable feedstock for biodiesel production.

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Abstract

Palm oil mill effluent (POME) was used to culture Chlorella vulgaris UMACC001 in 5-litre artificially illuminated airlift annular photobioreactors. Hydrodynamic and mass transfer characteristics were investigated for spargers perforated with different pore diameters. Maximum volumetric mass transfer coefficient and gas hold-up were achieved using sparger with 1 mm pores. The sparger was later used in the three-factor growth studies i.e. irradiance aeration rate and POME concentration designated using five- level central composite design. Results showed the chlorophyll-a (Chl-a) content and specific growth rate () ranged from 0.26 to 25.40 mg litre-1 and 0 to 1.033 per day respectively. The response surface model concluded that increasing irradiance while maintaining the aeration rate and POME concentration indicates the light remained the limiting factor during experimentation. POME concentration and irradiance were found to significantly affect the Chl-a production whereas the aeration rate was responsible for the . The optimised biomass contained 22.0 wt of lipid of which 57.0 of the fatty acids was saturated 26.9 monounsaturated and 16.1 polyunsaturated. The predominant components i.e. palmitic acid (C16:0) myristic acid (C14:0) stearic acid (C18:0) and eruric acid (C22:1) indicated that the biomass is a suitable feedstock for biodiesel production.

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Item Type:	Article
AGROVOC Term:	Chlorella vulgaris
AGROVOC Term:	Aquatic plants
AGROVOC Term:	Biomass
AGROVOC Term:	Production
AGROVOC Term:	Chemical composition
AGROVOC Term:	Photobioreactors
AGROVOC Term:	Hydrodynamics
AGROVOC Term:	Mass transfer
AGROVOC Term:	Distilled water
AGROVOC Term:	Aeration
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 07:19
URI:	http://webagris.upm.edu.my/id/eprint/24269

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