-A novel orange peel adsorbent developed from an agricultural waste material was characterised and utilised for the removal of Remazol Brilliant Blue from an artificial textile-dye effluent. The adsorption thermodynamics of this dye-adsorbent pair was studied in a series of equilibrium experiments. The time to reach equilibrium was 15 h for the concentration range of 30 mg L -1 to 250 mg L -1 . The adsorption capacity decreased with increasing temperature, from 9.7 mg L -1 at 20 °C to 5.0 mg L -1 at 60 °C. Both the Langmuir and Freundlich isotherm models fitted the adsorption data quite reasonably. The thermodynamic analysis of dye adsorption onto the orange peel adsorbent indicated its endothermic and spontaneous nature. Thus, the application of orange peel adsorbent for the removal of dye from a synthetic textile effluent was successfully demonstrated.
O objetivo deste trabalho foi desenvolver bebida fermentada à base de extrato hidrossolúvel de quinoa, determinar sua composição centesimal e realizar a avaliação sensorial e microbiológica do produto. Para o processo fermentativo foram utilizadas cepas desidratadas de Streptococcus thermophilus e Lactobacillus delbrueckii subsp. bulgaricus. O extrato hidrossolúvel de quinoa fermentado sem a adição de polpa de fruta e sacarose foi submetido às determinações de umidade, cinzas, lipídios, proteínas e carboidratos. Realizou-se o teste de aceitação e a avaliação microbiológica dos produtos, incluindo as determinações de coliformes totais, coliformes a 45ºC e Salmonella. O produto desenvolvido alcançou boa aceitação e atendeu aos padrões microbiológicos da legislação brasileira vigente. Concluiu-se que a bebida fermentada de extrato hidrossolúvel de quinoa constitui boa alternativa para a substituição de bebidas lácteas e à base de soja.
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