Title:	In vitro degradation and gas production of glycerin generated in the biodiesel production chain.
Authors:	SILVA, L. S. BEZERRA, L. R. SILVA, A. M. de A. CARNEIRO, H. MOREIRA, M. N. OLIVEIRA, R. L.
Affiliation:	Livia Soares Silva, Universidade Federal de Campina Grande, PB; Leilson Rocha Bezerra, Universidade Federal de Campina Grande, PB, Universidade Federal do Piauí, PI; Aderbal Marcos de Azevedo Silva, Universidade Federal de Campina Grande, PB; HELOISA CARNEIRO, CNPGL; Milena Nunes Moreira, Universidade Federal de Campina Grande, PB; Ronaldo Lopes Oliveira, Universidade Federal da Bahia.
Date Issued:	2015
Citation:	Acta Scientiarum. Animal Sciences, v. 37, n. 3, p. 265-272, 2015.
Description:	This study was realized to evaluate the production of gas and volatile fatty acids when glycerin was used to replace four forage species through the use of a semi-automated technique in vitro. The experimental design included 4 treatments and 4 replications. The treatments consisted of increasing levels of glycerin (0, 30, 50 and 70%), which was used to replace the forage plants Elephant grass, sugar cane silage, corn silage and Brachiaria grass. Replacement of the Brachiaria and Elephant grasses with glycerin linearly reduced the production of methane and carbon dioxide and ammonia nitrogen and had a positive effect on forage quality (p < 0.05). With the addition of glycerin, the values for acetate concentration decreased (p < 0.05); however, when added glycerin there was increased in propionic and butyric acid concentration (p < 0.05). Substitution of forage species for glycerin by tests for semi-automatic technique in vitro reduce the production of greenhouse gases (CH4 and CO2) which reduction in energy loss, and increase volatile fatty acids propionic and butyric.
Keywords:	Acetate Butyrate N-NH3 Propionate VFAs
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)