MATHEMATICAL MODELS FOR ESTIMATING METHANE PRODUCTION IN COVERED LAGOON BIODIGESTERS TREATING PIG MANURE
| Autor: | Alisson Carraro Borges, Izabelle de Paula Sousa, Juciara Oliveira Lopes, Nathalia Silva Oliveira, André Pereira Rosa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
anaerobic digestion
Energy recovery Mathematical model Agriculture (General) Statistical difference Environmental engineering modeling Agricultural and Biological Sciences (miscellaneous) Manure Methane S1-972 pig manure chemistry.chemical_compound chemistry Biogas biogas Environmental science Methane production Biogas production |
| Zdroj: | Engenharia Agrícola v.41 n.4 2021 Engenharia Agrícola Associação Brasileira de Engenharia Agrícola (SBEA) instacron:SBEA Engenharia Agrícola, Vol 41, Iss 4, Pp 438-448 (2021) Engenharia Agrícola, Volume: 41, Issue: 4, Pages: 438-448, Published: 15 SEP 2021 |
| ISSN: | 1809-4430 0100-6916 |
| DOI: | 10.1590/1809-4430-eng.agric.v41n4p438-448/2021 |
| Popis: | Covered lagoon biodigesters (CLB) have been widespread in Brazil in the treatment of pig manure. However, the quantification of biogas production in CLB using mathematical models is still limited and scarce. This study aimed to evaluate and compare six mathematical models—Chen-Hashimoto (Chen, 1983), CETESB (2006), COD Conversion (Chernicharo, 2016), IPCC (2006), Deng (Deng et al., 2014), and modified Stover-Kincannon (Yu et al., 1998)—usually used to estimate methane (CH 4 ), and propose improvements to the models, if necessary. The results were compared with the monitored production (P actual ) in a farm with CLB using the t-test (α = 5%). The Chen-Hashimoto, IPCC, Deng, and modified Stover-Kincannon models showed no statistical difference compared to P actual (405.0 m 3 CH 4 d −1 ), whereas the CETESB and COD Conversion models presented no statistical difference after the proposed improvements. All models can be considered reliable for estimating volumetric methane production after the adaptations, being relevant tools for diagnosis and decision-making regarding the energy recovery of biogas with CLB operation in pig farms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|