INFLUENCE OF GRAPE SEEDS MOISTURE CONTENT ON OIL QUANTITY BY COLD PRESSING OF MERLOT GRAPE VARIETY

Svrha ovog rada je prikazati proces proizvodnje ulja od sjemenki grožđa sorte Merlot, koje su osušene prirodnim putem, pomoću toplinskog zračenja sunca. Na temelju provedenih istraživanja i ispitivanja može se utvrditi problematika u proizvodnji od trenutka uzimanja sjemenki, prosijavanja, sušenja pa sve do prerade u ulje. Vrlo je istaknuta kvaliteta ulja osobito kod crnih sorata grožđa jer je bogato vitaminima i mineralima. Posebno treba posvetiti pažnju kod sušenja sjemenki te pažljivo kontrolirati njihovu vlažnost. Vlažnost ima velik utjecaj kod hladnog prešanja, te ga može otežati. Hladnim prešanjem iskoristivost sjemenki je mala. Završni proizvod, odnosno ulje, dobije se nakon provedene filtracije i taloženja.The purpose of this paper is to demonstrate the process of producing oil from Merlot grape variety, which are naturally dried by the thermal radiation of the sun. On the basis of the research and testing carried out, it is possible to identify the issues of production from seed sampling, sowing, drying and till processing into oil. The quality of oil is very high, especially in black grape varieties because it is rich in vitamins and minerals. Particular attention should be paid to drying seeds and to carefully control their moisture. Humidity has a great impact on cold pressing and can make it difficult. By cold compressing the usability of the seeds is small. The final product, i.e. oil, is obtained after filtration and precipitation