Modeling temperature and moisture dependent emissions of carbon dioxide and methane from drying dairy cow manure
| Autor: | Pakorn Sutitarnnontr, Markus Tuller, Scott B. Jones, Enzhu Hu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
General Veterinary
Moisture 05 social sciences Foundation (engineering) Environmental engineering carbon dioxide|dairy manure|methane|moisture|temperature 010501 environmental sciences lcsh:S1-972 01 natural sciences Methane chemistry.chemical_compound Agricultural experiment station chemistry Carbon dioxide 050501 criminology Environmental science lcsh:Agriculture (General) General Agricultural and Biological Sciences China Cow dung Air quality index 0505 law 0105 earth and related environmental sciences Biotechnology |
| Zdroj: | Frontiers of Agricultural Science and Engineering, Vol 5, Iss 2, Pp 280-286 (2018) |
| ISSN: | 2095-7505 |
| Popis: | Greenhouse gas emissions due to biological degradation processes of animal wastes are significant sources of air pollution from agricultural areas. The major environmental controls on these microbe-induced gas fluxes are temperature and moisture content. The objective of this study was to model the effects of temperature and moisture content on emissions of CO2 and CH4 during the ambient drying process of dairy manure under controlled conditions. Gas emissions were continuously recorded over 15 d with paired fully automated closed dynamic chambers coupled with a Fourier Transformed Infrared gas analyzer. Water content and temperature were measured and monitored with capacitance sensors. In addition, on days 0, 3, 6, 9, 12 and 15, pH, moisture content, dissolved organic carbon and total carbon (TC) were determined. An empirical model derived from the Arrhenius equation confirmed high dependency of carbon emissions on temperature and moisture content. Results indicate that for the investigated dairy manure, 6.83% of TC was lost in the form of CO2 and 0.047% of TC was emitted as CH4. Neglecting the effect of temperature, the moisture contents associated with maximum gas emissions were estimated as 0.75 and 0.79 g·g−1 for CO2 and CH4, respectively. |
| Databáze: | OpenAIRE |
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