Upaya Pemanfaatan Kotoran Sapi Sebagai Bahan Biogas, Pupuk Cair Dan Pupuk Padat

The increase of fuel since first of November 2014 has accelerated
the effort to develop renewable sources as renewable energy. Study
on the the use of cow waste as material of biogas, liquid fertilizer
and solid fertilizer is the effort to get renewable energy which is
affordable. The effort to reduce water that pour in biogas-reaction
mixture affects the volume of reactor and facilitates the separation
of liquid slurry to solid fertilizer and liquid fertilizer. Four variations
of liquid mixture affect duration of biogas formation and volume of
biogas production. The volume of biogas was analyzed with data
normality test. The best mixture is selected using factor analysis. The
best mixture is obtained from the mixture of 58% cow waste, 27%
liquid slurry, and 15% water. 38 day is the best period to produce
0.561 l/kg feces, 620 gr/kg feces, and 740 g/feces (wet).

Keywords: biogas, liquid manure , solid fertilizer, water mixtures