I Nyoman Pugeg Aryantha (a,b) and Jamilah (a)
a) Microbiology, Genetics and Molecular Biology, School Of Life Sciences and Technology, Institut Teknologi Bandung, Indonesia
b) Center for Life Sciences, Institut Teknologi Bandung, Indonesia
Corresponding author : nyoman@sith.itb.ac.id
ABSTRACT
Microbial fuel cell is a system that converts biochemical energy into electrical energy with the aid of the catalytic reaction of microorganisms. The potency of liquid tofu waste, liquid laboratory waste and slaughterhouse waste (rumen) was evaluated to produce electric voltage in microbial fuel cell (MFC) system. Liquid waste with the highest electric voltage was chosen to be optimized further by adding molasses and urea. Rumen was chosen since it produced the highest voltage with a value of 810 mV over seven days incubation. The voltage produced by the addition of 1 % molasses and 1 % urea (treatment 1) were 650 mV, while the addition with 2.5 % of molasses and 1% of urea (treatment 2) gave a higher value of voltage (825 mV), and without added substrate is 600 mV after 40 hours incubation. These results associated with FDA hydrolysis as a result of hydrolytic enzyme activity of microbial consortium in the system. Microbial consortium of rumen in treatment 2 was more active in hydrolyzing FDA into fluorescein (9.55 µg/ml/min) compared to treatment 1 (9.2 µg/ml/min).
Keywords: Microbial Fuel Cell (MFC), rumen, microbial consortium -------------------------------------------------------------------
2nd International Conference on Mathematics and Natural Sciences (ICMNS), Bandung, 2008
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