Biogas Production from Vietnamese Animal Manure, Plant Residues and Organic Waste: Influence of Biomass Composition on Methane Yield

Abstract

Anaerobic digestion is an efficient and renewable energy technology that can produce biogas from a variety of biomasses such as animal manure, food waste and plant residues. In developing countries this technology is widely used for the production of biogas using local biomasses, but there is little information about the value of these biomasses for energy production. This study was therefore carried out with the objective of estimating the biogas production potential of typical Vietnamese biomasses such as animal manure, slaughterhouse waste and plant residues, and developing a model that relates methane (CH4) production to the chemical characteristics of the biomass. The biochemical methane potential (BMP) and biomass characteristics were measured. Results showed that piglet manure produced the highest CH4 yield of 443 normal litter (NL) CH4 kg−1 volatile solids (VS) compared to 222 from cows, 177 from sows, 172 from rabbits, 169 from goats and 153 from buffaloes. Methane production from duckweed (Spirodela polyrrhiza) was higher than from lawn grass and water spinach at 340, 220, and 110.6 NL CH4 kg−1 VS, respectively. The BMP experiment also demonstrated that the CH4 production was inhibited with chicken manure, slaughterhouse waste, cassava residue and shoe-making waste. Statistical analysis showed that lipid and lignin are the most significant predictors of BMP. The model was developed from knowledge that the BMP was related to biomass content of lipid, lignin and protein from manure and plant residues as a percentage of VS with coefficient of determination (R-square) at 0.95. This model was applied to calculate the CH4 yield for a household with 17 fattening pigs in the highlands and lowlands of northern Vietnam.

Influence of chemical composition on biochemical methane potential of fruit and vegetable waste

“…here)As lignin is non-degradable under anaerobic conditions(Triolo et al 2011), lignin shows to be inversely correlated to BMP, which was also observed byTriolo et al (2011) andDandikas et al (2014) using energy crops andCu et al (2015) using plant residues and animal manure. Although the correlation between measured and predicted BMP using only lignin in this study is quite low (R 2 = 0.023), due perhaps to the very low concentration of lignin in all the samples, the model precision estimated by standard error is fairly fine.…”

“…However, there is a relationship between methane yield and the type of organic matter found in substrate. Some studies have successfully found this relationship by building mathematical regression models that compare the organic matter and the amount of methane produced (Buffiere et al, 2006;Cu et al, 2015;Dandikas et al, 2014). However, none of them has used FVW as a single substrate.…”

“…Dandikas et al (2014) reported lignin as the parameter that best described methane yield from energy crops, with its content below 10%. Cu et al (2015) reported that lipids, proteins, cellulose, and lignin are the best predictors of BMP for combined animal and plant biomass, with lipid able to explain most of the variation (59.9%).…”

Application of Iron-Based Adsorbent (Feooh) to Remove Hydrogen Sulfide (H2s) From Biogas

“…Biogas produced from the animal farm manure anaerobic fermentation is primarily composed of methane (CH 4 ) and carbon dioxide (CO 2 ), with smaller amounts of ammonia (NH 3 ), hydrogen (H 2 ), nitrogen (N 2 ), carbon monoxide (CO), saturated water or halogenated carbohydrates [1,2]. Biogas has a high heating value of between 15 and 30 MJ/Nm 3 so it is an attractive source of energy [3].…”

Production and Quality in Dwarf Napier Grass Pasture Fertilized by Digested Effluent of Manure under Two-Years of Dairy Cow-Grazing in Warm Regions of Japan

“…Even if liquid DE had already fermented in an anaerobic process by bio-gas plant (Cu et al, 2015), there remained slight odor in the solution. In the present study, we maintained almost 30 days of rest period after foliar application of liquid DE was carried out at the post-grazing in each paddock and herbage consumption was not significantly different between DE and CF plot in either year.…”