Co-digestão dos dejetos de suínos e óleo vegetal de descarte: adição de microrganismos e lipases comercias

• Ano de defesa: 2015
• Autor(a) principal: Sunada, Natália da Silva [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Suino - Criação; Biogas; Metano; Lipídios; Lipase; Methane
• Link de acesso: http://hdl.handle.net/11449/123881; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/09-06-2015/000832663.pdf

The objective of the implementation of this work the study on the recommended levels of disposal of oil addition to swine manure as well as the influence of the inclusion of lipase levels or Biol®, in order to evaluate the effect of increased production of biogas, methane and reduction of solids. Two steps were conducted, the first with respect to recommended levels of oil addition and using the second oil levels that were negative effect on lipase or Biol® added. For assay development co-digestion of the first stage substrates were prepared containing 4% total solids (TS), composed of swine manure disposal of oil (in the ratios of 0, 2, 4, 6, 8, 10 and 12 %) addition of water for dilution of this waste and inoculum to supply batch digesters. For development of the second stage was performed supply of batch digesters with substrates containing 4% TS, composed of swine manure disposal of oil (in the ratios of 8, 10 and 12%), lipase (in the proportions of 0.05; 0.10, 0.15, 0.20 and 0.25%) or Biol® (10 g/m3 to 15 g/m3) than water for dilution of these residues and inoculum. Regarding the influence of the oil addition levels found that the maximum TS and VS reductions were 36.8 and 41.1% and occurred at levels of 5.2% oil and 5.8 to substrates, the additions of 5.4 and 6.1% enabled the oil potential range of 222.9 and 263.6 liters of biogas per kg TS and VS added. Referring to influence of adding oil and lipase was found that reductions of TS and VS were 56.13 and 64.49% and were in inclusion levels of 0.15 and 0.13% lipase and 12% of oil added to the substrates and that the greatest potential of methane production per g of TS and volatile solids (VS) added (0.23 and 0.29 liters) were achieved by greater inclusion of oil (12%) was added when the levels of 0.12 and 0.11% lipase. Regarding the inclusion of Biol®, it was found that the higher potential production of methane per g TS and VS added (0.22 and 0.27 liters, respectively) were ...