The Influence of Total Solid Contents on Biogas Yield from Cattle Manure Using Rumen Fluid Inoculum

Abstract

Problem statement: Anaerobic digestion was a biological method used to convert organic wastes into biogas and a stable product for land application without adverse environmental effects. The biogas produced could be used as an alternative renewable energy source. The aim of this study was to analyze the influence of total solid contents on biogas yield from cattle manure using fluid rumen inoculums. Approach: A series of laboratory experiments using 400 mL biodigester were performed in batch operation mode. Given 100 g of fresh cattle manure was fed to each biodigester and mixed with fixed 50 mL of rumen fluid and different volumes of tap water resulting six different Total Solid (TS) contents i.e., 2.6, 4.6, 6.2, 7.4, 9.2, 12.3 and 18.4%. Results: The results showed that the best performance for biogas production was the digester with 7.4 and 9.2% of total solid i.e., gave biogas yield 184.09 and 186.28 mL gVS −1 , respectively after 90 days observation. While the other TSs content of 2.6, 4.6, 6.2, 12.3 and 18.4% gave the biogas yield 115.78, 122.33, 172.34, 137.99 and 54.87 mL gVS −1 , respectively. Conclusion: These results suggested that, based on TS content effects to biogas yield, rumen fluid inoculum exhibit the similar effect with other inoculums. In all cases, there was no variation of pH, fat, protein and ash content in sludge after digestion at several variation of pH. During digesting, pH tends to increase to neutral pH i.e., optimum pH for methanogenic bacteria. The effect of rumen fluid concentration to biogas production will need to be studied in the next step research.

Exploration of One-Factor Rsm to Optimize the Concentration of Organic Fraction of Municipal Solid Waste (OFMSW) for Biogas Production

“…Figures 4-11 show that cumulative biogas production tend to resemble the sigmoid function (S curve) as generally observed in microbial batch growth [30]. This was expected because biogas production rate under batch condition directly corresponds to bacterial population growth dynamics (especially the methanogens) during anaerobic digestion of organic matter [12,17,30,31]. The highest volume of cumulative biogas production (596.4 ml) was recorded in the experimental set-up with 30% substrate concentration ( Figure 12).…”

“…On the other hand, as one of the driving forces of economic and social development, anaerobic digestion of OFMSW for the production of sustainable biofuel (such as biogas) as well as biofertilizer has become a growing world interest [1][2][3][4][5][6][7][8][9][10][11][12][13]. The initial concentration or solid content of the substrate in a bioreactor can significantly affect performance of the anaerobic digestion process [14][15][16][17][18][19]. In order to increase the efficiency of anaerobic digestion, it is necessary to understand the role of total solids content (substrate concentration) on the behaviour of the microbial communities involved in anaerobic digestion of organic matter in wet and dry technology [18].…”

Kinetic Model Development for Biogas Production from Lignocellulosic Biomass

“…The modified Gompertz equation which gives the cumulative biogas production from batch digesters assumes that the biogas production rate corresponds to the specific growth rate of methanogenic bacteria in the digester (Budiyono et al, 2010;Nopharatana et al, 2007;Yusuf et al, 2011). Equation 1 presents the modified Gompertz equation as given below.…”

Biogas Production From Tofu Liquid Waste on Treated Agricultural Wastes

“…Therefore, the difference on the biogas production on this research depended on the characteristics of the organic materials. Budiyono et al (2011) The reductions in total solids, total suspended solids, fixed suspended solids, total Kjeldahl nitrogen, ammonium nitrogen and methane yield were all significantly affected by the diurnal temperature range and hydraulic retention time (Ghaly and Al Hattab, 2011).…”

“…The value was on the optimum pH for the anaerobic digestion, thus this condition was not the limiting factor in producing the biogas. Budiyono et al (2011) mentioned there was no variation of pH, fat, protein and ash content in sludge after digestion. During digesting, pH tends to increase to neutral pH i.e., optimum pH for methanogenic bacteria.…”