hot rapeseed oil mill machine with low solvent consumption in zimbabwe

                                               
                                               
                                               
                                               
                                               
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  • How much rapeseed oil can be extracted by cold pressing?
  • A nozzle diameter of 10 mm, a screw frequency of 50 Hz, and a press head temperature of 80 °C ensured the maximum pressed rapeseed oil yield of 26.65% within the applied experimental domain. The crude oil extraction degree achieved by cold pressing was 60.8% of the rapeseed oil yield obtained by the Soxhlet method.
  • How is rapeseed oil extracted?
  • There are several purely mechanical extraction methods: cold pressing, pressing after cooking and double pressing (cold pressing followed by heat conditioning and a second pressing). Their performance in terms of residual oil content in the meal ranges from 9.9 to 16.3%, 9.7 to 15.7% and 8.7 to 13.5% residual oil (rapeseed), respectively .
  • Can cold pressed rapeseed oil be used as functional oil?
  • Cold-pressed rapeseed oil can use as functional oil due to its health benefits. Rapeseed oil is the second most abundant produced edible oil in the world with low erucic acid and low glucosinolate. Thus, the quality of rapeseed oil had attracted global attention.
  • Does microwave pre-treatment of rapeseed increase oil extraction yield?
  • Wroniak et al. (2016) reported the microwave pre-treatment of rapeseeds for 3 min would help to increase the oil extraction yield up to 64.5% with the rapeseeds presented 9% of moisture content. Microwave pre-treatment helps to reduce the moisture content of rapeseed, which affected the oil extraction yield from the seeds.
  • How rapeseed oil is extracted by cold pressing compared to Soxhlet Method?
  • The crude oil extraction degree achieved by cold pressing was 60.8% compared to the Soxhlet method. The rapeseed oil contains predominantly oleic, linoleic, linolenic, and palmitic acids, agreeing with other reported rapeseed oils.
  • How to maximize rapeseed oil yield?
  • In the present study, the optimization aimed to maximize rapeseed oil yield by selecting the suitable screw pressing conditions, i.e., the best nozzle diameter, press head temperature, and screw frequency in the applied experimental domain, by employing the desirability function method.