Title:	Anaerobic co-digestion of swine and laying hen waste for biogas generation and digestate quality.
Authors:	PEREIRA, F. E. de A. ROSA, A. P. BORGES, E. S. M. OTENIO, M. H. SOUZA, L. D. de NASCIMENTO, J. E. L. do BORGES, A. C.
Affiliation:	FLÁVIA E. DE A. PEREIRA, Instituto Federal Sudeste-MG ANDRÉ P. ROSA, Universidade Federal de Viçosa EDUARDO S. M. BORGES, Instituto Federal Sudeste-MG MARCELO HENRIQUE OTENIO, CNPGL LETÍCIA D. DE SOUZA, Instituto Federal Sudeste-MG JULIANA E. L. DO NASCIMENTO, Instituto Federal Sudeste-MG ALISSON C. BORGES, Universidade Federal de Viçosa.
Date Issued:	2023
Citation:	Engenharia Agrícola, v. 43, e20220124, 2023.
Description:	Anaerobic digestion (AD) stands out as a degradation pathway for the treatment of agroindustrial waste. This study aimed to evaluate the biogas production (Pb) from the codigestion of swine (SW) and laying hen waste (LHW) under different temperature conditions (psychrophilic x mesophilic). The studies were carried out on a laboratory scale in anaerobic reactors (1.25 L) in a batch system for 60 days. Three mixtures in volumetric proportions (%) of 25/75 (P1), 50/50 (P2), and 75/25 (P3) (SW/LHW) were studied. The mixtures were characterized before and after AD in terms of TS, VS, and COD under temperatures of 18 and 36 °C, with Pb measured daily. Pb was higher at 36 °C for all mixtures compared to the psychrophilic condition (18 °C). Among the mixtures, the highest Pb value was observed for P3, reaching 0.34 and 0.60 m3 biogas kg−1 CODremoved for 18 and 36 °C, respectively. The digestate showed an increase in the contents of micro-and macronutrients for P1, P2, and P3 after AD, which indicates its use for agricultural purposes. The co-digestion of swine and laying hen waste is a promising proposal in terms of management and energy recovery of biogas, especially for mesophilic conditions in mixtures with a predominance of laying hen waste.
Thesagro:	Resíduo Orgânico Biogás Suíno Galinha
Keywords:	Digestão anaeróbica Mesofílico Psicrofílico
DOI:	http://dx.doi.org/10.1590/1809-4430-Eng.Agric.v43nepe20220124/2023
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)