Ammonia and Greenhouse Gas Emissions from Biogas Digester Effluent Stored at Different Depths

dc.contributor.author Wang, Yue
dc.contributor.author Dong, Hongmin
dc.contributor.author Zhu, Zhiping
dc.contributor.author Li, Tong
dc.contributor.author Mei, Kai
dc.contributor.author Xin, Hongwei
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-15T03:18:17.000
dc.date.accessioned 2020-06-29T22:41:16Z
dc.date.available 2020-06-29T22:41:16Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.embargo 2014-10-21
dc.date.issued 2014-01-01
dc.description.abstract <p>Carbonaceous and nitrogenous gases are produced during storage of livestock manure, with the magnitude of production being affected by the chemical properties of the manure and the physical conditions of storage. This lab-scale study quantifies the emission rates of ammonia (NH3), nitric oxide (NO), and greenhouse gases (GHG), i.e., methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O), from biogas digester effluent (BDE) stored at different depths of 1.0, 1.5, and 2.0 m in dynamic emission vessels (DEVs). The selected storage depths were reflective of the typical depth range of on-farm BDE storage in China. The static storage was held at a relatively constant media temperature of 15°C and an air exchange rate of 11.5 air changes per hour (ACH) for 78 days. Each depth regimen was replicated four times using four DEVs (12 DEVs total). The results showed that the mean (±SE) daily gaseous emission rates per volume of BDE stored at 1.0, 1.5, and 2.0 m depths, in g gas m-3 d-1, were, respectively, 9.1 (±0.7), 10.1 (±0.6), and 10.1 (±0.4) for CH4 (p = 0.39); 38.0 (±2.2), 34.5 (±1.3), and 30.7 (±0.6) for CO2 (p < 0.05); 1.9 (±0.11), 1.3 (±0.08), and 0.9 (±0.03) for NH3 (p < 0.05); and 6.7 (±0.5) × 10-3, 5.0 (±0.8) × 10-3, and 3.4 (±0.2) × 10-3 for N2O (p < 0.05). Nitric oxide (NO) emissions were negligible. The overall GHG (CH4 + N2O + CO2) emissions were dominated by CH4, which accounted for more than 85% of the CO2-equivalent emissions for all three storage depths. The CH4 emissions peaked during the early storage period, with the first 20-day cumulative emissions accounting for 56% to 58% of the total 78-day storage emissions. The results reveal that storage of BDE at 2.0 m depth yielded lower CO2, NH3, and N2O emission rates but similar CH4 emission rates compared to the 1.0 and 1.5 m depths.</p>
dc.description.comments <p>This article is from <em>Transactions of the ASABE</em> 57 (2014): 1483–1491, doi:<a href="http://dx.doi.org/10.13031/trans.57.10630" target="_blank">10.13031/trans.57.10630</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/611/
dc.identifier.articleid 1893
dc.identifier.contextkey 6266043
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/611
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1397
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/611/2014_Wang_AmmoniaGreenhouse.pdf|||Sat Jan 15 01:16:37 UTC 2022
dc.source.uri 10.13031/trans.57.10630
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Ammonia
dc.subject.keywords Biogas digester effluent (BDE)
dc.subject.keywords Carbon dioxide
dc.subject.keywords Methane
dc.subject.keywords Nitrous oxide
dc.subject.keywords Storage depth
dc.title Ammonia and Greenhouse Gas Emissions from Biogas Digester Effluent Stored at Different Depths
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 36e0a8ce-fa2e-4df4-9f67-8d1717122650
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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