Measurement of methane production from pig and cattle manure in Lithuania

Abstract

The current experiment was conducted to quantify methane (CH 4 ) productivity from pig and cattle manure. The manure was collected from twenty commercial farms in different parts of Lithuania. The biogas production and ultimate methane production were measured in a batch experiment according to the international standard. Manure was stored for a period of up to 70 days at constant 35 ± 1°C temperature. Infrared or electrochemical detection was adopted to analyze the methane and carbon dioxide content in biogas. Theoretical methane production was calculated according to the chemical composition of manure. In our study, the theoretical methane production from the total volatile solids (VS) for both pig and cattle manure was in the range of 0.41-0.46 m 3 kg -1 CH 4 VS. Theoretical methane production from easily degradable volatile solids was by 26.72% lower than that from total volatile solids. During the storage period, up to 64% of total manure volatile solids and up to 89% of easily degradable volatile solids had decomposed. The ultimate methane production for pig liquid manure was the highest and reached 0.29 m 3 kg -1 CH 4 VS. The methane production for pig solid fraction of manure was 0.12 m 3 kg -1 CH 4 VS, for the liquid fraction of pig manure -0.18 m 3 kg -1 CH 4 VS. The methane production for dairy cattle liquid and solid manure, also non dairy cattle solid manure reached 0.20-0.21 m 3 kg -1 CH 4 VS. For dairy cattle slurry the methane production was the lowest -0.05 m 3 kg -1 CH 4 VS, in comparison with other samples. Our study showed that methane production for pig and cattle manure in Lithuania was from 13% to 36% lower than the default values recommended for Europe (IPCC Guidelines…, 2006) and are used for calculations of national methane emission from manure.

Stability of Thermophilic Pig Manure Mono-digestion: Effect of Thermal Pre-treatment and Separation

“…The proposed carbohydrate content was almost double the value in this study as besides degradable also non-degradable carbohydrates were included. The lipid content was significantly higher than the values found by Matulaitis et al (2015) for fresh LPM and the solid fraction of SPM, which amounted to respectively 3.5 and 0.5 kg lipids per ton, probably due to dissimilarities in the pig's feed ration and the separation technique. Manure composition in terms of carbohydrates, proteins and lipids is directly related to the methane potential (Weinrich, 2019).…”

“…Manure composition in terms of carbohydrates, proteins and lipids is directly related to the methane potential (Weinrich, 2019). For LPM, the methane potential typically ranges from 150 to 480 m 3 per ton of oDM (Al Seadi et al, 2008;Deublein and Steinhauser, 2009;Matulaitis et al, 2015), given a methane content of 60% (Al Seadi et al, 2008). Values for SPM on oDM base are comparable to those for LPM (Deublein and Steinhauser, 2009;Matulaitis et al, 2015;Vermeulen, 2019).…”

“…For LPM, the methane potential typically ranges from 150 to 480 m 3 per ton of oDM (Al Seadi et al, 2008;Deublein and Steinhauser, 2009;Matulaitis et al, 2015), given a methane content of 60% (Al Seadi et al, 2008). Values for SPM on oDM base are comparable to those for LPM (Deublein and Steinhauser, 2009;Matulaitis et al, 2015;Vermeulen, 2019). However, the methane potential and thus energy content in terms of mass is much higher for SPM due to (partial) removal of the urine, containing a limited amount of organic matter (Vannecke et al, 2018) and therefore having a low methane potential (Asam et al, 2011;Deng et al, 2014).…”

The Efficiency of Industrial and Laboratory Anaerobic Digesters of Organic Substrates: The Use of the Biochemical Methane Potential Correction Coefficient

“…The yield of biogas obtained from pig manure per TS in individual samples ranged from 350 (3PM) to 473 (4PM) m 3 •Mg −1 TS. In reference publications, there are big differences in the data on the biochemical methanogenic potential of pig manure obtained per TS [48]. The yield of biogas obtained from waste potatoes ranged from 323 (3PW) to 326 (5PW) m 3 •Mg −1 TS.…”

“…The methane content in the biogas obtained from pig manure ranged from 50.8 (2PM) to 52.6% (5PM). According to the authors of scientific studies, the methane fraction in the biogas obtained as a result of the methane fermentation of pig manure was above 53% [48]. The concentration of methane in the biogas obtained from waste potatoes ranged from 50.7% (2PW) to 52.2% (5PW).…”