Study of solvent system for biodiesel production from sludge palm oil SPO by enzymatic transesterification

Ricca Rahman N., . and Md. Zahangir A., . and Mohammed Saedi J., . (2014) Study of solvent system for biodiesel production from sludge palm oil SPO by enzymatic transesterification. [Proceedings Paper]

Biodiesel is a non-toxic renewable fuel that has been highly demanded because it reduces the emission of air pollutants thus a good alternative for the petroleum-derived fuel which is now having depletion unstable price escalation and causes environmental problems. In this study sludge palm oil SPO which is a low cost and abundantly produced waste oil was investigated to produce biodiesel by direct enzymatic transesterification using lipase. The lipase was produced locally by Candida cylindracea from a low cost basal medium palm oil mill effluent POME in order to eliminate the higher cost of commercial lipases. Several factors in solvent system were studied to enhance the biodiesel production. Ethanol was selected as the acyl acceptor because it gave higher percentage of yield and conversion of free fatty acids FFAs into biodiesel than the methanol. The optimum ethanol-to-SPO molar ratio was found to be 4: I while the increasing of water content reduced the activity of the lipase thus it gave lower percentage of yield and conversion of FFAs into biodiesel. Thus enzyme loading investigation was done to limit the use of water. It was found that enzyme loading at IOU with water content of 7 volume of water per volume of SPO v/v SPO gave higher percentage of yield and conversion of FFAs into biodiesel. It was also found that the addition of tert-butanol with 1:1 tert-butanol-to-SPO molar ratio increased the percentage of the yield and conversion of FFAs into biodiesel by 80.54 and 25.68 respectively.

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Abstract

Biodiesel is a non-toxic renewable fuel that has been highly demanded because it reduces the emission of air pollutants thus a good alternative for the petroleum-derived fuel which is now having depletion unstable price escalation and causes environmental problems. In this study sludge palm oil SPO which is a low cost and abundantly produced waste oil was investigated to produce biodiesel by direct enzymatic transesterification using lipase. The lipase was produced locally by Candida cylindracea from a low cost basal medium palm oil mill effluent POME in order to eliminate the higher cost of commercial lipases. Several factors in solvent system were studied to enhance the biodiesel production. Ethanol was selected as the acyl acceptor because it gave higher percentage of yield and conversion of free fatty acids FFAs into biodiesel than the methanol. The optimum ethanol-to-SPO molar ratio was found to be 4: I while the increasing of water content reduced the activity of the lipase thus it gave lower percentage of yield and conversion of FFAs into biodiesel. Thus enzyme loading investigation was done to limit the use of water. It was found that enzyme loading at IOU with water content of 7 volume of water per volume of SPO v/v SPO gave higher percentage of yield and conversion of FFAs into biodiesel. It was also found that the addition of tert-butanol with 1:1 tert-butanol-to-SPO molar ratio increased the percentage of the yield and conversion of FFAs into biodiesel by 80.54 and 25.68 respectively.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia TP339 B615 Call Number
AGROVOC Term:	Biodiesel
AGROVOC Term:	Production
AGROVOC Term:	Energy sources
AGROVOC Term:	Palm oils
AGROVOC Term:	Enzymatic analysis
AGROVOC Term:	Free fatty acids
AGROVOC Term:	Candida cylindracea
AGROVOC Term:	Fuels
AGROVOC Term:	Pollutant emission
AGROVOC Term:	Air pollution
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:14
URI:	http://webagris.upm.edu.my/id/eprint/12102

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