Este trabalho contempla um relato de experiência do evento “Alquimagia Circus Show” organizado pelo núcleo de Química do IFMG- Campus Bambuí e que envolveu a associação entre a disciplina de química e os números apresentados em espetáculos circenses. A metodologia adotada consistiu em dividir os discentes que cursavam as disciplinas de Química e que pertenciam aos cursos técnicos integrados e superiores, em oito equipes. Cada uma destas ficou responsável pela elaboração de uma apresentação circense com duração entre 10 e 15 minutos, relacionando a química em seus números. As apresentações aconteceram no anfiteatro aberto do Campus, contando com a presença da comunidade acadêmica e externa. As equipes foram avaliadas por uma banca composta por servidores internos e externos ao Campus. Os resultados revelaram que o evento desenvolvido logrou êxito na medida em que além de contemplar a química no circo, foi capaz de integrar os participantes, os coordenadores, avaliadores e público visitante em um verdadeiro espetáculo. Os resultados indicaram que o evento pode atuar como um recurso didático-pedagógico favorecedor do processo de ensino e aprendizagem.
Swine production is characterized as a potentially harmful activity to the environment. Therefore, it is necessary to find alternatives that can minimize problems caused by this activity. Among the alternatives, we highlight the use of deep litter, which provides a breeding system that promotes the treatment of waste in solid form. The digester is used as an adjunctive treatment to the deep litter as this alone is not sufficient to remove all content of polluting waste. The objective of study was to evaluate the efficiency of laboratory digesters in reducing pollutant loads from swine deep litter. Deep litter composed of wood shavings and sugarcane bagasse was used. Samples were collected at the inlet and outlet of the biodigester. Six model laboratory batch digesters with a volume of 20 liters were used in treatment. For the efficiency reduction pollutants manure analysis, the following physical-chemical parameters were analyzed in the inlet and outlet: Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Solids (TS), total nitrogen, total phosphorus and pH. The mean removal efficiencies of BOD, COD, TS were 53.38; 54.53% and 44.97%, respectively. Based on the results it was found that the anaerobic treatment system was effective to reduce and stabilize the organic matter of the manure. There was an increase in total nitrogen and total phosphorus after treatment, which makes its favorable for use as a biofertilizer. There were no significant changes in pH indicating good tamponade of the system.
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