4. DISCUSSION
4.1. Biogas Production
The daily biogas production on the treatment B
continuously increased until 2000 cm3/day on the 20th
day. On the treatment E, the production was relatively
constant, 200-600 cm3/day. This indicated that those
treatments had potential to produce the biogas in 20
days. On the treatment C, the biogas commenced to be
produced after the 15th day since it has the complex
component. Therefore it took a longer time to digest. The
previous research by Patil et al. (2011) showed that
poultry litter produced the highest biogas with better rate
as it contains more nutrients compared to primary sludge
and water hyacinth.
The plot of observation time (day) and the increase of
biogas pressure (N/m2) or the biogas volume (cm3) had
the parabola pattern. The increase of relative pressure on
the biogas productivity reached the peak on the nth day.
Then, the relative productivity decreased as the biomass
was degraded into biogas by anaerobic bacteria during
the degradation process (Goendi et al., 2008).
The biogas production was determined by several
important factors, such as the C/N ratio of the substrate.
The sheep dung might be able to increase the ratio from
5 to 15. This condition was better from the methanogen
bacteria to produce higher amount of biogas. Besides,
when the TSS value was low, it should be changed to
fulfill the minimum requirements of the methanogen
bacteria on the liquid waste. This would be affect the
amount of biogas produced during the anaerobic
degradation (Suyitno and Dharmanto, 2010).
The TLW (treatment A), itself, could not produce the
biogas as it was not suitable for the methanogen bacteria.
The previous research by Goendi et al. (2008) showed
that the TLW had low TSS. The low TSS affected the
produced biogas. Therefore, the difference on the biogas
production on this research depended on the
characteristics of the organic materials. Budiyono et al.
(2011) mentioned that the best performance for biogas
4. DISCUSSION
4.1. Biogas Production
The daily biogas production on the treatment B
continuously increased until 2000 cm3/day on the 20th
day. On the treatment E, the production was relatively
constant, 200-600 cm3/day. This indicated that those
treatments had potential to produce the biogas in 20
days. On the treatment C, the biogas commenced to be
produced after the 15th day since it has the complex
component. Therefore it took a longer time to digest. The
previous research by Patil et al. (2011) showed that
poultry litter produced the highest biogas with better rate
as it contains more nutrients compared to primary sludge
and water hyacinth.
The plot of observation time (day) and the increase of
biogas pressure (N/m2) or the biogas volume (cm3) had
the parabola pattern. The increase of relative pressure on
the biogas productivity reached the peak on the nth day.
Then, the relative productivity decreased as the biomass
was degraded into biogas by anaerobic bacteria during
the degradation process (Goendi et al., 2008).
The biogas production was determined by several
important factors, such as the C/N ratio of the substrate.
The sheep dung might be able to increase the ratio from
5 to 15. This condition was better from the methanogen
bacteria to produce higher amount of biogas. Besides,
when the TSS value was low, it should be changed to
fulfill the minimum requirements of the methanogen
bacteria on the liquid waste. This would be affect the
amount of biogas produced during the anaerobic
degradation (Suyitno and Dharmanto, 2010).
The TLW (treatment A), itself, could not produce the
biogas as it was not suitable for the methanogen bacteria.
The previous research by Goendi et al. (2008) showed
that the TLW had low TSS. The low TSS affected the
produced biogas. Therefore, the difference on the biogas
production on this research depended on the
characteristics of the organic materials. Budiyono et al.
(2011) mentioned that the best performance for biogas
การแปล กรุณารอสักครู่..