Matrix mechanical extraction of Jatropha curcas L. kernels: A novel method for improving oil recovery

Publication Type

Poster

Authors

Romuli, S; Karaj, S; Müller, J

Year of publication

2013

Published in

Euro Fed Lipid Congress, Book of abstracts

Page (from - to)

347

Conference name

11th Euro Fed Lipid Congress and 30th ISF lecture series – New strategies for High Quality Future

Conference location

Antalya, Turkey

Conference date

27 - 30 October, 2013

Keywords

Jatropha

Mechanical oil extraction of Jatropha seeds is well-known process for production of oil as direct fuel or biodiesel production. The Jatropha oil is stored in kernel and oil extraction of kernels has been assessed as suboptimal due to the lack of knowledge about the best operation parameters. The mechanical extraction method has a big obstacle namely, low friction inside screw press cylinder due to low tenderness of the kernels. In order to improve oil recovery efficiency, matrix material with firm texture and oil content is used as additive. The objective was to investigate and report the influence of the additives such as rapeseed, soybean and corn against oil recovery efficiency. Tests were carried out with 10, 20 and 30 % m/m additive. The physical design of mechanical screw press which was used in this study (Komet D85-1G), such as nozzle (6, 8 and 10 mm diameter) and rotational speed of screw press (19, 27, and 35 rpm) were alternated. As a result, the optimum conditions for the mixtures with rapeseed, soybean and corn are; nozzle 6 mm, additive 30 % m/m and screw speed 19 rpm; nozzle 6 mm, additive 23 % m/m and screw press19 rpm; nozzle 10 mm, additive 30 % m/m, and screw press 19 rpm, respectively. The highest oil recovery efficiency for rapeseed, soybean and corn were achieved at 75.4, 94.5, and 90.6 %, respectively. The results show that soybean is the most suitable additive to reach the highest oil recovery efficiency. Oil analysis shows that high temperature of press head leads to higher oil recovery value and free fatty acid. The use of matrix material is suggested for increasing oil recovery efficiency.