BIOGAS FROM SOLID WASTE OF TOFU PRODUCTION AND COW MANURE MIXTURE: COMPOSITION EFFECT
Abstract: The demand of
conventional energy (fossil fuel) is increasing as the human population growth.
The fuel from petroleum is the energy source from fossil fuel which is
un-renewable, the price is also tend to me more expensive due to the absence of
demand and supply balance. The fuel crisis indicate that the fossil fuel belong
to Indonesia is decreasing. The limited of fosil fuel lead to the need to the
development of renewable energy and energy conservation. One of the alternative
energy is biogas which can be produced from solid waste of tofu production
(SWTP). Tofu production waste has high acidity so that it needs a buffer in
biogas production. One of the buffer which can be utilized is cow manure. The
experiment was done in a batch anaerobic reactor. As many as 800 ml of sample
was entered to the reactor with the
capacity of 1 L, then incubated in an anaerobic condition in the room at the temperature
of 25-30oC within 30 days. There are 8
variation apply in this research, they are KS:KT=100:0,75:25, 50:50,25:75 and
0:100 at VS of 3%, and KS:AT 50:50
at VS of 2%,4% and 5%. The measured parameter is the biogas volume,
methane concentration, carbon dioxide concentration, the ratio of C vs N, total
solid (TS) and volatile solid content (VS), volatile fatty acid (VFA), pH and temperature. The gas volume
measurement was done every day using gasholder while methane concentration was
measured by gas chromatography (GC). Research results shows that the
composition of cow manure and SWTP at VS of 3% KS:AT = 50:50 shows the highest
methane concentration. Optimal retention time to increase the production of
biogas is start 14-28 days with the improvement methane concentration is 68,98% at 21st day.
Penulis: Lailan Ni’mah
Kode Jurnal: jpkimiadd140088
