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Biodiesel Production from Waste Oil Through Efficient Enzymatic Synthesis Using Yarrowia lipolytica Lipase 2 in the Presence of Glucose, β-Cyclodextrin, or G50
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Biodiesel Production from Waste Oil Through Efficient Enzymatic Synthesis Using Yarrowia lipolytica Lipase 2 in the Presence of Glucose, β-Cyclodextrin, or G50
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Biodiesel Production from Waste Oil Through Efficient Enzymatic Synthesis Using Yarrowia lipolytica Lipase 2 in the Presence of Glucose, β-Cyclodextrin, or G50
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Journal Article
Biodiesel Production from Waste Oil Through Efficient Enzymatic Synthesis Using Yarrowia lipolytica Lipase 2 in the Presence of Glucose, β-Cyclodextrin, or G50
2025
Overview
In this study, the liquid lipase
Yarrowia lipolytica
lipase 2 (YLLip2) expressed by
Pichia pastoris
GS115 was used to produce biodiesel from waste oil. Four signal peptides were compared to express YLLip2 in
P. pastoris
, among which SP23 exhibited greater secretion performance. In a 1.3-L bioreactor with FM22 medium for 7 days incubation, the maximum YLLip2 activity and total protein content reached 895.44 ± 27.31 U/mL and 3.83 ± 0.31 g/L, respectively. Under the optimal reaction conditions of 30 °C, 20% moisture content, 50 U/g oil of enzyme dosage, and distributed methanol addition, the reaction yield reached 80.99% after 12 h. To further improve the biodiesel yield, some additives were used to assist with YLLip2. The results showed that adding G50 (approximately 1/20 of YLLip2) increased the yield by approximately 90% after 6 h cultivation without changing the enzyme dosage. Compared with previous studies, the reaction time for biodiesel production from waste oil in this study was significantly shortened. This study provides a workable method for converting low-quality feedstocks containing high free fatty acids into biodiesel using a liquid lipase as the catalyst.
