Household food-waste composting is an attractive alternative for Brazilian waste management; however, there are few programs or studies regarding the implementation or management of this small-scale process. This study investigates the performance of food-waste composting using a simple and small-scale domestic composter. Three composting trials were conducted using food waste and wood chips in 10 L plastic bins using different filling schemes. In the first trial, the composter was filled weekly over two months. In the second, the composter was filled once with a mixture of food waste and 100% of the used wood chips from the previous trial. In the last third trial, the composter was filled with food waste and wood chips (50% of wood chips used in the second trial and 50% of untreated wood chips). The physical chemical parameters of the compost were monitored and the total coliforms and E. coli were measured. In all trials, the temperature varied between 26.7°C and 46.2°C throughout the process. The reduction in wet mass was 58-69%, while the reduction in dry mass was 37-61%. The pH value, the contents of carbon and nitrogen and the C/N ratio were in accordance with the values recommended in norm 25 (July, 2009) adopted by Brazil's Agriculture Ministry. Only the compost from Trial 2, which had 1900 MPN g -1 total solids, did not meet the E. coli standards; this was likely due to the fact that when the temperatures did not reach the thermophilic phase, the relatively long time the waste remains in the composter allows these pathogenic microorganisms to decay naturally.Keywords: domestic composter, food waste, household composting. Compostagem doméstica de resíduos de alimentos em composteira de pequena escala RESUMOA compostagem doméstica de resíduos alimentares é uma opção atraente para a gestão dos resíduos no Brasil; no entanto, existem apenas poucos programas, estudos e experiências sobre o comportamento deste processo em pequena escala. Esta pesquisa investigou o desempenho da compostagem de resíduos de alimentos em uma composteira simples e de pequena escala doméstica. Três ensaios de compostagem foram realizados com resíduos de alimentos e aparas de madeira em recipientes de plástico de 10 L utilizando diferentes estratégias de preenchimento. No primeiro ensaio, a composteira foi preenchida 719 Household food-waste composting using … Rev. Ambient. Água vol. 12 n. 5 Taubaté -Sep. / Oct. 2017 semanalmente durante dois meses. No segundo ensaio, a composteira foi preenchida uma única vez com uma mistura de resíduos de alimento e das aparas de madeira utilizadas no ensaio anterior. No último ensaio, a composteira foi preenchida com resíduos de alimentos e aparas de madeiras (50% de aparas de madeira utilizados na segunda etapa e 50% de aparas de madeira não tratadas). Os parâmetros físicos e químicos foram monitorados e os coliformes totais e E. coli foram quantificados no composto. Em todos os ensaios, a temperatura variou entre 26,7°C e 46,2°C ao longo do processo. A redução da massa úmida foi de 58-69...
An álise da gestão de resíduos sólidos em conjuntos habitacionais do Programa 'Minha Casa, Minha Vida' na cidade de Salvador, Bahia, BrasilAnalyzing the solid waste management of the housing program 'Minha
This work presents the epistemological bases, the first definitions, as well as possible referrals, surveys and analyses that will sustain the applied research that has been carried out within the scope of the Doctorate in Diffusion of Knowledge. The problem of the doctoral scientific work is: what is the contribution of teacher training in digital information and communication technologies to the pedagogical practice in the Education of Youth and Adults at a Distance of SESI Bahia? The locus of scientific research is the SESI School Rector Miguel Calmon, located in Retiro, in the city of Salvador – Bahia, located in the region of the Old Quilombo do Cabula. The epistemological conception adopted in this scientific research is socioconstructivist. The research approach used for the construction of this article was qualitative research instrumentalized by a bibliographic research. The results point to an epistemological research based on socioconstructivism and supported by the methodology of Application Research, which is an innovative research approach for bringing together the advantages of qualitative and quantitative methodologies.
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