Effect of different inoculations on biogas and methane production through anaerobia biodigeston using residues from the avícola sector

The present study aimed to analyze the use of different digestates as inocula for the anaerobic digestion of poultry litter, evaluating the biogas and methane production. The inocula used were: bovine and porcine biofertilizer; with feeding loads of 0.67, 1.00 and 1.67 gVS L-1 day-1. Statistical analyses followed a split-plot design, where the main plot being inoculum and the feeding load as secondary. The experimental data were submitted to analysis of variance, at the level of 5% of significance. The following variable responses were considered: biogas production, specific biogas production as a function of volatile solids (VS) added to the biodigester, specific biogas production as a function of organic load, in terms of COD, and methane production. The highest rates of average biogas production, specific biogas production by VS added, specific production of biogas as a function of COD, and average methane production occurred with the use of bovine inoculum. Through the analysis of the total average percentage of methane production, productions of 63.0% and 54.5% for bovine and swine inoculum. Considering the results obtained, the use of bovine inoculum for the process of anaerobic digestion of poultry litter is recommended vinculado a produção de biogás e metano

Efficiency of chemical preservatives used in raw milk samples for bacterial counts by flow cytometry

ABSTRACT The objective of this study was to evaluate and compare two chemical preservatives in terms of their sample preservation capabilities, considering the individual bacterial count (IBC) and time and temperature variables. Samples were collected in expansion tanks in three commercial dairy farms located in the northwest of Rio Grande do Sul, characterized as G1: low IBC values, G2: average IBC values, and G3: high IBC values. The tanks were stored at three different temperatures (4, 10, and 25 °C) for 14 d. Samples supplemented with the preservative Azilat in G1 (lower IBC group) exhibited the best results at a temperature of 4 °C, whereas for G2 and G3, the results showed no statistically significant difference between temperatures 4 and 10 °C. The temperature 25 °C exhibited the worst results. For samples preserved with Azidiol, regardless of the studied group (G1, G2, and G3), the temperatures of 4 and 10 °C did not present a significant difference regarding the preservation of the samples, with the temperature of 25 °C exhibiting the worst results. Azilat was effective in keeping the samples conserved when they presented low IBC, being able to fluctuate with the increase in IBC and temperature variation. Azidiol was effective regardless of the initial IBC level

Lodo de esgoto e cama de aviário como componente de substratos para a produção de mudas de Cedrela fissilis e Anadenanthera macrocarpa (Benth). Brenan

The objective of this work was to test the doses of sewage sludge and broiler litter associated with the commercial substrate in different proportions for the production of seedlings Cedrela fissilis and Anadenanthera macrocarpa (Benth). Brenan. The study was carried out in house with vegetation, and the treatments tested were: T0: 100% substrate; T1: 75% substrate + 25% broiler litter; T2: 50% substrate + 50% broiler litter; T3: 75% substrate +25% sewage sludge; T4: 50% substrate + 50% sewage sludge. The plants of each treatment were evaluated at 30, 60 and 90 days after replanting for the phytometric parameters: root length, shoot length, leaf number, root dry mass, shoot dry mass, collection diameter, mass Fresh aerial part and, fresh root pasta. The use of the broiler litter in the production of the seedlings was not efficient, since the plants, in the treatments T1 and T2, did not survive. The treatments T3 and T4, composed of different proportions of sludge, had significant positive effects on the length parameter of the area at 30 days after replanting for the Angico seedlings. The other parameters did not present significant statistical differences in relation to the commercial substrate in any of the evaluations for both species. However, a positive trend was observed in T3 treatment at 90 days after replanting for all parameters, evidencing the possibility of reuse of the sludge in the production of Cedrela fissilis and Anadenanthera macrocarpa (Benth) seedlings.O objetivo do trabalho foi testar doses de lodo de esgoto e cama de aviário associada ao substrato comercial em diferentes proporções para a produção de mudas de Cedrela fissilis e Anadenanthera macrocarpa (Benth). Brenan. O estudo foi desenvolvido em casa de vegetação, e os tratamentos testados foram: T0: 100% substrato; T1: 75% substrato + 25% cama de aviário; T2: 50% substrato + 50% cama de aviário; T3: 75% substrato + 25% lodo de esgoto; T4: 50% substrato + 50% lodo de esgoto. As plantas de cada tratamento foram avaliadas aos 30, 60 e 90 dias após replantio quanto aos parâmetros fitométricos: comprimento de raiz, comprimento da parte aérea, número de folhas, massa seca de raiz, massa seca de parte aérea, diâmetro do coleto, massa fresca da parte aérea e, massa fresca da raiz. O uso da cama de aviário na produção das mudas não foi eficiente, uma vez que as plantas, nos tratamentos T1 e T2, não sobreviveram. Os tratamentos T3 e T4, compostos por diferentes proporções de lodo, apresentaram efeitos positivos significativos sobre o parâmetro comprimento da parte aérea aos 30 dias após replantio para as mudas de Angico. Os demais parâmetros não apresentaram diferenças estatísticas significativas em relação ao substrato comercial em nenhuma das avaliações para ambas as espécies. Contudo, observou-se tendência positiva no tratamento T3 aos 90 dias após o replantio para todos os parâmetros, evidenciando a possibilidade do reaproveitamento do lodo na produção de mudas de Cedrela fissilis e Anadenanthera macrocarpa (Benth)

Avaliação Fisioterapêutica de Trabalhadoras de um Setor de Higienização

Este estudo teve por objetivo realizar a avaliação fisioterápica com as trabalhadoras responsáveis pela higienização na Unijuí. A avaliação procurou identificar as principais queixas ou desconfortos referidos pelas trabalhadoras, analisar as tarefas bem como as posturas adotadas na realização das mesmas. Para tanto foram utilizados como instrumentos de pesquisa uma ficha de avaliação físico-funcional e um questionário. O estudo apontou a presença de um número significativo de trabalhadoras que sentem dores, dores estas que estão muito relacionadas às posturas incorretas adotadas na atividade laboral e ao tipo de esforço que realizam. Estes dados apontam para a importância da realização de ações em saúde no espaço de trabalho, visando a prevenção do adoecimento e a melhora na qualidade de vida dos trabalhadores

Effect of different inoculations on biogas and methane production through anaerobia biodigeston using residues from the avícola sector

The present study aimed to analyze the use of different digestates as inocula for the anaerobic digestion of poultry litter, evaluating the biogas and methane production. The inocula used were: bovine and porcine biofertilizer; with feeding loads of 0.67, 1.00 and 1.67 gVS L-1 day-1. Statistical analyses followed a split-plot design, where the main plot being inoculum and the feeding load as secondary. The experimental data were submitted to analysis of variance, at the level of 5% of significance. The following variable responses were considered: biogas production, specific biogas production as a function of volatile solids (VS) added to the biodigester, specific biogas production as a function of organic load, in terms of COD, and methane production. The highest rates of average biogas production, specific biogas production by VS added, specific production of biogas as a function of COD, and average methane production occurred with the use of bovine inoculum. Through the analysis of the total average percentage of methane production, productions of 63.0% and 54.5% for bovine and swine inoculum. Considering the results obtained, the use of bovine inoculum for the process of anaerobic digestion of poultry litter is recommended vinculado a produção de biogás e metano