Artículos de revistas
Methanogenic potential and microbial community of anaerobic batch reactors at different ethylamine/sulfate ratios
Fecha
2011-03-01Registro en:
Brazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 28, n. 1, p. 1-8, 2011.
0104-6632
10.1590/S0104-66322011000100001
S0104-66322011000100001
WOS:000288301800001
S0104-66322011000100001.pdf
4801145654206305
0000-0002-6002-3840
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Methylamine and sulfate are compounds commonly found in wastewaters. This study aimed to determine the methanogenic potential of anaerobic reactors containing these compounds and to correlate it with their microbial communities. Batch experiments were performed at different methylamine/sulfate ratios of 0.71, 1.26 and 2.18 (with respect to mass concentration). Control and experimental runs were inoculated with fragmented granular sludge. The maximum specific methane formation rates were approximately 2.3 mmol CH4 L-1 g TVS-1 day-1 for all conditions containing methylamine, regardless of sulfate addition. At the end of the experiment, total ammonium-N and methane formation were proportional to the initial concentrations of methylamine. In the presence of methylamine and sulfate, Firmicutes (46%), Deferribacteres (13%) and Proteobacteria (12%) were the predominant phyla of the Bacteria domain, while Spirochaetes (40%), Deferribacteres (17%) and Bacteroidetes (16%) predominated in the presence of methylamine only. There was no competition for methylamine between sulfate-reducing bacteria and methanogenic archaea.