WON Ltd.: A leading company in the field of raw materials trade for green energy production; National coverage network for waste oil collection; Own refinery for waste oil treatment; Qualified staff with extensive experience in the field of waste handling fats in Bulgaria since 2002; Operates locally and internationally; Offers innovative solutions for its customers; Conduct regular training for personnel to improve quality of service; Invest in extensive research for new possible use of RES in other fields; Popularized renewable energy.