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    • Waste butter and margarine as feedstock for biodiesel production 

      Schabort, C.J.; Visser, H.P.; Hartzenberg, A.; Venter, R.; Marx, S. (ETA-Florence Renewable Energies, 2012)
      The resulting bio-waste from butter and margarine factories should be disposed of in an environmentally friendly manner. Currently the bio-waste is either flushed into the municipal sewerage system or moved to landfill ...