Biodegradation and methane production from glycerol-containing synthetic wastes with fixed-bed bioreactor under mesophilic and thermophilic anaerobic conditions

Comparison of Uasb and Fluidized-Bed Reactors for Sulfate Reduction

“…This is a by-product of biodiesel production that contains approximately 50-60% glycerol, 12-16% alkali soaps and hydroxides, 15-18% methyl-ethers, 8-12% methanol and 2-3% water. With the development of the biodiesel industry, a surplus of crude glycerol is foreseen, but it has been tested mostly as a substrate for methane production (Álvarez et al, 2010;Fountoulakis and Manios, 2009;Lopez et al, 2009;Yang et al, 2008), and only a few studies have addressed glycerol application as a potentially inexpensive carbon and electron source for SRB growth (Dinkel et al, 2010;Qatibi, 1990). Therefore, this work initially sought to assess the performance of two different bioreactors treating sulfate-laden waters: (i) an UASB reactor, which has a simple and inexpensive design and does not require a supporting material for bacterial growth, and (ii) a FB reactor, in which activated carbon was utilized as support.…”

Improving Anaerobic Methane Production from Ammonium-rich Piggery Waste in a Zeolite-fixed Bioreactor and Evaluation of Ammonium Adsorbed on Zeolite A-3 as Fertilizer

“…A number of microbes assembled on the surface of fixed zeolite ( Figure 6B) resulted to the high concentration of ATP. The distribution of microbes in the liquid phase and on the surface of the support materials were about 5% and 95%, respectively [29].…”

Produção de biogás a partir de glicerol oriundo de biodiesel

“…A disponibilidade de nutrientes é essencial para o crescimento e conseqüente aumento da atividade metabólica de archaeas e bactérias (LETTINGA et al, 1999 Yang et al, (2008).…”

“…Além disso, o número de pesquisas sobre a utilização de glicerol no tratamento anaeróbio de águas residuárias tem aumentado, em especial para produção de metano visando geração de energia (SILES LÓPEZ et al, 2009;HUTŇAN et al, 2009;CONTRIM, 2009;BODÍK et al, 2008;YANG et al, 2008). A produção de hidrogênio a partir da digestão anaeróbia de glicerol residual, ainda sem resultados em escala industrial, pode ser uma alternativa promissória de aplicação deste subproduto (ITO et al, 2005).…”