• seed oil extraction using a solar powered screw press
  • seed oil extraction using a solar powered screw press
  • seed oil extraction using a solar powered screw press
  • seed oil extraction using a solar powered screw press
  • Can a single screw press optimise the oil extraction of seeds?
  • The single screw press used in this study was designed as a modular barrel (Fig. 1) and config-ured with 3 screw types, namely the transport (T), forward (F) and idle screws (I) (Fig. 2). Each screw had a diferent pitch length, and its configuration along the screw press could be flexibly modified to optimise the oil extraction of the seeds.
  • What is screw press extraction?
  • Currently, the screw press is mainly used in oil mills, the use of hydraulic presses is limited to a certain type of raw materials (cocoa, olives). For this reason, the screw press extraction was chosen as a reference method. This mechanical pressing process must be optimized to increase the oil yield.
  • Can a screw press extract Calophyllum seeds?
  • Hence, reduc-ing the seeds’ moisture content in oil the extraction of the Calophyllum seeds using a screw press could significantly improve the oil yield and the extrac-tion eficiency (Fadhlullah et al. 2015). At a low moisture content, the pressure in the screw press may expand due to the increased seed rigidity.
  • Can a twin-screw press extract oil from different oilseeds?
  • On the other hand, the application of a twin-screw press configured with diferent screw types has been proven to successfully extract oil from various oilseeds with a high quantity and quality of the oil yield (Kartika et al. 2005, 2006; Amalia Kartika et al. 2010; Evon et al. 2013).
  • Are screw press extraction conditions optimum?
  • The screw press extraction conditions would be considered optimum if the oil yield reached maximum values. The canonical analysis showed that the stationary point of the response surface relative to the oil yield is a saddle point. In this case, the stationary point is not the optimum point.
  • How is oil extracted from seeds?
  • The oil extraction process was conducted at a screw rotation speed of 25 rpm, the seeds’ feed rate of 1.5–5 kg·h–1 and a pressing temperature of 45–75°C. The extracted oil was then filtered using a vacuum filter to eliminate the impurities, and the filtered oil was weighed. The oil yield was, thus, cal-culated based by Eq. (1):