Ultrasonication aided biodiesel production from one-step and two-step transesterification of sludge derived lipid

作者：Zhang Xiaolei; Yan Song; Tyagi Rajeshwar Dayal; Drogui Patrick; Surampalli Rao Y

来源：Energy, 2016, 94: 401-408.

DOI：10.1016/j.energy.2015.11.016

• Biodiesel
• Ultrasonication
• Lipid extraction
• Solvents
• In-situ transesterification

Trichosporon oleaginosus was grown in wastewater sludge to produce lipid. The obtained biomass was employed to study ultrasonication effect on lipid extraction and in-situ transesterification. Besides the most utilized solvents (the mixture of chloroform and methanol, 1:1 v/v), other solvents including water, hexane, and methanol were also studied to explore their capacities in lipid extraction with ultrasonication. The maximum lipid recovery was 11.8, 35.3, 62.0, and 95.3% (w/w) with water, hexane, methanol, and the mixture of chloroform and methanol (1:1 v/v), respectively within 20 min. Chloroform and methanol gave the best performance. However, due to the adverse environmental concern related to the utilization of chloroform, in-situ transesterification (single step lipid extraction and transesterification to obtain biodiesel) was investigated.
In case of in-situ transesterification, biodiesel yield of 95% (w/w) was obtained in 60 min with the assistance of ultrasonication; whereas, 24 h was required to achieve similar yield without ultrasonication.

• 出版日期2016-1-1