Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Fermentations Of Various Whey Types With Using Kluyveromyces Lactis In The Production Of Bioethanol And Organic Liquid Fertilizer

The research aimed to determine Kluyveromyces lactis concentrations and whey type that appropriate in producing the best bioethanol production with distillery waste as organic liquid fertilizer. This experimental research was done based on Completely Randomized Design with 3 x 3 factorial patterns. Treatments consisted of two factors, namely the addition of different Kluyveromyces lactis concentrations (5%, 10% and 15% v/v) and combinations of whey types (neufchatel whey, feta whey and mixed neufchatel and feta whey 1:1), with three replications. Whey was fermented by Kluyveromyces lactis with the concentration of 5%, 7.5%, and 10% (v/v) at the temperature of 33ºC for 24 hours and then distillated twice at the temperature range 78 ° -100 °C. The first distillation gives bioethanol purity until 86% and the second one gives purity until 95%. The result showed that 5% concentration of Kluyveromyces lactis on neufchatel whey (K1W2) produce best bioethanol content of 1.94% and liquid organic fertilizer with N content of 0.1%; P of 0.067%; K of 0.135%; and pH of 5.7.