Valéria Reginatto

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Textile effluents cause a high environmental impact when released into the environment without correct treatment. In this work, we have evaluated the capacity of treatment of a textile effluent using a biological and a chemical method using the sequence Phanerochaete chrysosporium-ozone. The fungal treatment was performed by direct incubation of a fungus(More)
The chemical composition of pectin production wastewater and its toxicity during biological treatment were investigated. Samples of wastewater from different steps of a pectin production wastewater biological treatment plant were investigated including the influent of the treatment (1), after denitrification tank (2), after anaerobic treatment (3) and final(More)
Santa Catarina State, southern Brazil, has the greatest swine breeding activities of Latin America. Generally, the piggery wastewater is treated in pond systems that are able to remove organic material according to local environmental legislation. However, these systems do not remove nitrogen and phosphorus efficiently. This work deals with a post-treatment(More)
A microfauna presente em uma ETE por lodos ativados foi caracterizada, correlacionada com parâmetros físico-químicos e utilizada em modelos existentes de avaliação de sistemas. Durante 351 dias o lodo ativado manteve-se estável com flocos compactos, pequenos e com poucos filamentos. Os protozoários predominantes no lodo foram as tecamebas e os ciliados(More)
Bioconversion, particularly enzymatic hydrolysis of cellulosic materials to useful products has great potential and is being actively investigated [l-31. Biotechnological utilization of cellulose requires a very efficient cellulolytic enzyme system active on native cellulose. Cellulases are nulticomponent enzyme systems in which the synergistic action of(More)
To achieve economically competitive biological hydrogen production, it is crucial to consider inexpensive materials such as lignocellulosic substrate residues derived from agroindustrial activities. It is possible to use (1) lignocellulosic materials without any type of pretreatment, (2) lignocellulosic materials after a pretreatment step, and (3)(More)
Sour cassava starch (polvilho azedo) is a chemically and enzymatically modified starch. It is used in traditional products in bread-making because of its expansion property, which forms a light, alveolar structure and dismisses the use of any chemical or biological ferment. The present work was performed with the objective of suggest some easy assay(More)
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