KULTIVASI BOTRYOCOCCUS BRAUNII MEMANFAATKAN AIR DADIH (WHEY) TAHU SEBAGAI POTENSI BIODIESEL
ABSTRACT: Production of
biodiesel comes from trans-esterification reaction of fatty acid which produces
methyl ester. Vegetables, animals and microalgae can be used for fatty acid
sources by their oil, but microalgae have a more beneficial prospect compared
to vegetables and animals. Microalgae have fast grow-rate, high oil
productivity, low production cost and not having a competition with food
industries. Among microalgae, Botryococcus braunii is the one with high oil
quantity inside their cells (25 – 75 %). The wastewater of tofu industries is
liquid residual from soybean processing becomes tofu which having a nuisance
for the environment. This wastewater, usually called whey, is still containing
organic materials such as water (99,34 %), protein (1,73 %), fat (0,63 %),
nitrogen content (0,05%) and ash (0,11 %) and COD. Organic materials have
effect to stimulate microalgae’s growing. Objectives of this experiment are the
influence of tofu whey addition at different concentrations toward biomass and
lipid produced. This experiment provided the result which optimal cultivation
of Botryococcus braunii reaches when using 10% concentration tofu whey with
optimal optical density (OD) at day 9 (0,802), 2,4101 gram/litre of gained
biomass and 0,8716 gram/litre of lipid production.,better than cultivation of
Botryoccus braunii using syntetic nutrient. Maximum COD reduction was gained at
15% tofu whey addition with 88,51% efficiency. COD reduction at optimal tofu
whey addition (10%) is 83,33%.
Penulis: Tirna Adhika Rahmat,
Rosa Delima Dias W.S., Danny Soetrisnanto
Kode Jurnal: jpkimiadd130326
