Biodigestão de vinhaça para produção de biogás e reaproveitamento agrícola

• Autor(a) principal: Ueno, Camiia Roberta Javorski
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/4350
• topic: Biodigestão anaeróbia; Biogás; Vinhaça in natura; Vinhaça coagulada; Biocombustível; Vinhaça como fertilizante.; Anaerobic digestion; Biogas; Vinasse in natura; Vinasse coagulated; Biofuel; Vinasse as fertilizer.; Engenharias; Engenharia Biomédica

The growing demand for fuels becomes increasingly necessary the adequacy of methods of reuse of by-products and wastes generated in the production of these fuels, maximizing power generation. Under certain viewpoint, vinasse is considered as a residue and can be used in biogas production from the anaerobic biodigestion. The present work focus on the investigation of biogas production using both plain and concentrated vinasse. Specifically, with the production of biogas it is evaluated the removal of chemical oxygen demand (COD), color and turbidity in the biodegradation process and the anaerobic treated vinasse is tested to improve soil quality. In this way, searching for vinasse alternative use that improves its quality when used in fertilization and irrigation while providing biofuel from this co-product. The anaerobic biodigestion study was carried with concentrated vinasse (using moringa) and in plain one, being both vinasses distinctly inoculated and treated in bench scale reactor. The production of biogas from the reactor was evaluated in terms of gas volume produced and concentration of the main components of biogas was determined. The biodegraded vinasses were evaluated in terms of the removal of COD, color, turbidity, pH variation and presence of macronutrients and micronutrients. The performance of biodegraded vinasse on the growth of lettuce and its influence on the pH of soils in cultured vessels was investigated. The obtained results demonstrate that the biodegraded vinasses produced reasonable levels of methane, being the digestion process able to reduce the color, turbidity, COD and increase the pH of both plain and concentrated vinasses. The soils treated with biodegraded vinasses showed better development of root and shoot dry weight of lettuce plants. After cultivation the pH of soil pH was increased considerably meaning a lower requirement of soil correctives.