Automatic temperature rise in the manure storage tank increases methane emissions: Worth to cool down!

Im, Seongwon; Mostafa, Alsayed; Lim, Kyeong-Ho; Kim, Ijung; Kim, Dong-Hoon

doi:10.1016/j.scitotenv.2022.153533

Cited by 10 publications

(5 citation statements)

References 37 publications

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“…The outside air temperature was at or below 5 • C during most of the winter storage period and resulted in low CH 4 emissions independent of treatments. This effect of temperature was in agreement with a study of dairy slurry storage (Cardenas et al, 2021), and with a study reporting that lowering the temperature of pig slurry from 35 to 20 • C during storage reduced CH 4 emission by 90% (Im et al, 2022). Also, Safley and Westerman (1994) reported a linear decrease of CH 4 production rates in pig and cattle slurry with temperature declining from 25 to 10 C. Dalby et al (2021) discussed mechanisms that may be involved in the regulation of CH 4 emissions and argued that methanogens are adapted to specific temperature ranges, and that, in addition to the direct effect of temperature on organic matter decomposition, there will be a need for successional changes in the methanogenic community of the slurry in a colder outside storage delaying emissions.…”

Section: Methane Emissionssupporting

confidence: 91%

Frequent Export of Pig Slurry for Outside Storage Reduced Methane But Not Ammonia Emissions in Cold and Warm Seasons

Chun¹,

Guldberg

Hansen

et al. 2023

Preprint

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Section: Methane Emissionssupporting

confidence: 91%

Frequent Export of Pig Slurry for Outside Storage Reduced Methane But Not Ammonia Emissions in Cold and Warm Seasons

Chun¹,

Guldberg

Hansen

et al. 2023

Preprint

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“…Figure 1A shows the cumulative CH 4 emissions from the salt-added PS during 40 days of storage. During the period of storage, the amount of CH 4 emissions from the control (raw PS) was increased, finally reaching 1.83 ± 0.06 kg CH 4 /ton PS, which was within the range of CH 4 emissions obtained from the former works (1.5–2.5 kg CH 4 /ton PS) (Clemens et al, 2006 ; Chen et al, 2008 ; Im et al, 2022 ). As sodium concentration increased from 1 to 13 g Na + /L, the emissions gradually decreased to 1.72–0.60 kg CH 4 /ton PS, due to the well-known sodium inhibition of the methanogenic consortium (Feijoo et al, 1995 ).…”

Section: Resultssupporting

confidence: 71%

“…For example, pig slurry (PS) generally stays for 1–6 months before being transported to treatment facilities (Riaño and García-González, 2015 ; Loyon, 2018 ). PS can be piled up several meters, creating an anaerobic condition, and emits 1.1–4.2 kg of CH 4 /ton of PS during the storage period (Clemens et al, 2006 ; Misselbrook et al, 2016 ; Petersen et al, 2016 ; Im et al, 2022 ). In the life-cycle analysis, this amount of emissions could diminish the environmental benefit resulting from the anaerobic digestion (AD) of PS, which can generate renewable energy (Shin et al, 2019 ; Im et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Use of reverse osmosis concentrate for mitigating greenhouse gas emissions from pig slurry

Kang

Jang

et al. 2023

Front. Microbiol.

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Due to the high global warming potential (GWP) in a short time scale (GWP100 = 28 vs. GWP20 = 86), mitigating CH4 emissions could have an early impact on reducing current global warming effects. The manure storage tank emits a significant amount of CH4, which can diminish the environmental benefit resulting from the anaerobic digestion of manure that can generate renewable energy. In the present study, we added the reverse osmosis concentrate (ROC) rich in salt to the pig slurry (PS) storage tank to reduce CH4 emissions. Simultaneously, pure NaCl was tested at the same concentration to compare and verify the performance of ROC addition. During 40 days of storage, 1.83 kg CH4/ton PS was emitted, which was reduced by 7–75% by the addition of ROC at 1–9 g Na+/L. This decrease was found to be more intensive than that found upon adding pure sodium, which was caused by the presence of sulfate rich in ROC, resulting in synergistic inhibition. The results of the microbial community and activity test showed that sodium directly inhibited methanogenic activity rather than acidogenic activity. In the subsequent biogas production from the stored PS, more CH4 was obtained by ROC addition due to the preservation of organic matter during storage. Overall, 51.2 kg CO2 eq./ton PS was emitted during the storage, while 8 kg CO2 eq./ton PS was reduced by biogas production in the case of control, resulting in a total of 43.2 kg CO2 eq./ton PS. This amount of greenhouse gas emissions was reduced by ROC addition at 5 g Na+/L by 22 and 65 kg CO2 eq./ton PS, considering GWP100 and GWP20 of CH4, respectively, where most of the reduction was achieved during the storage process. To the best of our knowledge, this was the first report using salty waste to reduce GHG emissions in a proper place, e.g., a manure storage tank.

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“…Most of the literature presents environmental conditions, most notably the temperature, manure management on the farm, and chemical composition, as the main factors influencing methane emissions from liquid manure storage. Some studies verified the seasonal effect of temperature and showed that seasonal average temperatures above 15 • C lead to higher methane emissions [19][20][21][22]. There is a consensus that residual old manure left after the removal of slurry hosts adapted microorganisms that cause immediate production of methane when inoculating fresh manure [21,23,24].…”

Section: Introductionmentioning

confidence: 98%

Methane Emissions from Livestock Slurry: Effects of Storage Temperature and Changes in Chemical Composition

Hilgert

Amon

et al. 2022

Sustainability

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Livestock production contributes to releasing methane into the atmosphere. Liquid manure management offers significant opportunities to reduce these emissions. A better understanding of the factors controlling methane emissions from manure is necessary to select effective mitigation strategies. Our study aimed to identify the influence of storage temperature and the associated change in chemical composition on methane emissions from dairy and fattening pig manure. Storage temperature affects microbial activity and induces changes in chemical composition that are key influences in methane emissions. Dairy and fattening pig manure samples were stored at five different temperatures (5–25 °C) for 90 days in a laboratory-scale experiment to measure the methane production. The chemical composition of the slurry samples was analyzed, and the biochemical methane potential (BMP) tests were performed before and after storage. For pig manure stored at 25 °C and 20 °C, methane emissions accounted for 69.3% and 50.3% of the BMP, respectively. Maximum methane emissions for dairy slurry were observed at 25 °C but remained at a low level. Analyses of the accumulation of volatile fatty acids (VFAs) during storage are presented in few studies, this work revealed a potential inhibition of methane production, where the accumulation of VFAs was most elevated in samples stored at 20 °C and 25 °C. This partly counteracted the increase in methane emissions expected from the higher temperatures. The degree of VFA and dissociated fatty acids accumulation in dairy cattle slurry should be assessed for more accurate estimations of methane emissions from slurry stores.

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Automatic temperature rise in the manure storage tank increases methane emissions: Worth to cool down!

Cited by 10 publications

References 37 publications

Frequent Export of Pig Slurry for Outside Storage Reduced Methane But Not Ammonia Emissions in Cold and Warm Seasons

Frequent Export of Pig Slurry for Outside Storage Reduced Methane But Not Ammonia Emissions in Cold and Warm Seasons

Use of reverse osmosis concentrate for mitigating greenhouse gas emissions from pig slurry

Methane Emissions from Livestock Slurry: Effects of Storage Temperature and Changes in Chemical Composition

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