POTENSI AIR DADIH (WHEY) TAHU SEBAGAI NUTRIEN DALAM KULTIVASI CHLORELLA SP. UNTUK BAHAN BAKU PEMBUATAN BIODISEL
ABSTRACT: An increase of
population growth and energy demand has lead to a foster fuel consumption,
therefore an alternative fuel is necessarily needed for a solution to solve the
problem. Currently, one of the most popular solution offered is biodiesel. The
development of biodiesel as renewable energy is done by using microalgae such
as Chlorella sp. with 28-32% lipid content as its raw material. The objective
of this research is to find out the effect of various concentration, biomass
based on growth time, and lipid content based on growth time result by
comparing it to the addition of synthetic nutrients and whey (5%, 10%, 15%,
20%, and 25% Total Volume). The optimal growth on cultivation of Chlorella sp.
with the addition of synthetic nutrients occurs in day 9 with 0,487 Optical
Density (OD), 2,0818 grams/litre of dry biomass, and 0,493 grams/liter of
lipid. While for Chlorella sp. cultivation with the addition of tofu waste
water (whey) has its optimum condition for Optical Dansity occurs in day 9 of
20%V whey addition which is 0,486. Also observed in day 9, the optimum
condition for dry biomass and lipid of 25%V whey addition is 4,2125 grams/litre
and 1,081 grams/litre. Chlorella sp. cultivation using 25%V whey addition
produced better result comparing to cultivation by using synthetic nutrient.The
maximum COD reduction occurs in 15%V whey addition with 77,01% reduction
efficiency, while on the other hand, with the addition of whey in its optimum
variable (25%V) resulting a decrease of efficiency by 64,28%. Based on tofu
industrial center located in Jomblang, with 7 quintals per day of soybean as
raw material, it can produce lipid for biodiesel feedstock amounted up to 0,188
kg per day.
Penulis: Dhika Joko Arinto,
Hayu Pradipta Paramastri, Danny Soetrisnanto
Kode Jurnal: jpkimiadd130346
