PERFORMANCE, MICROBIAL COMMUNITY ANALYSIS AND FERTILIZER VALUE OF ANAEROBIC CO-DIGESTION OF CATTLE MANURE WITH WASTE KITCHEN OIL

Autor(es)

Nogueira, R. G. S. ^[1] ; Lim, T. T. ^[2] ; Wang, H. ^[3] ; Rodrigues, P. H. M. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Anim Prod & Nutr, Pirassununga, SP - Brazil

^[2] Univ Missouri, Dept Food Syst & Bioengn, Columbia, MO - USA

^[3] Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX - USA

^[4] Univ Sao Paulo, Dept Anim Prod & Nutr, Pirassunga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED ENGINEERING IN AGRICULTURE; v. 35, n. 2, p. 239-248, 2019.
• Citações Web of Science: 0

Resumo

Co-digestion trials of beef cattle manure and waste kitchen oil (WKO) were conducted to evaluate potential increase of biogas production for a local beef farm anaerobic digester. The trials were conducted using laboratory-scale, semi-continuously loaded digesters under mesophilic conditions, with 21-day hydraulic retention time (HRT). In a preliminary test, WKO was added at 0%, 0.5%, 1.0%, 1.5%, and 2.0% by volume, each with replicate digesters (n=2), except for the 0% level, which had one digester (n=1). Methane (CH4) yield per week increased linearly with WKO levels. Populations of bacteriodetes decreased, while clostridiales and synergistales increased with the WKO levels. A second test was conducted using treatments with more replication: control (n=3), and 1.0% (n=3) and 2% (n=3) WKO levels. Methane yields of the 1.0% and 2.0% WKO levels were 79.1% and 203% higher than the control, respectively. Addition of WKO have resulted in changes of the metagenomics of the digesters. Populations of clostridiales increased, while bacteroidales and euryarchaeota methanomicrobia YC-E6 decreased with the WKO levels. The findings confirm adding low amounts (1% and 2%) of WKO as co-digestion feedstock can be an effective way to increase CH4 yield for beef operation anaerobic digestion, especially when there are available feedstock nearby. (AU)

• Processo FAPESP: 15/06577-3 - Performance de biodigestores e análise microbiana da co-digestão anaeróbia de dejetos bovino com óleo de cozinha usado
• Beneficiário: Ricardo Galbiatti Sandoval Nogueira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado