Influência de aditivos na formulação de adesivos à base de substâncias poliméricas extracelulares extraídas do lodo ativado
This paper presents part of the study carried out at the Green Chemistry Research Center of the Karel de Grote University in Antwerp, as part of the intermediate internship at the École Nationale Supérieure en Génie des Technologies Industrielles (ENSGTI). The purpose of the study was to contribute...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/54932 |
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| Resumo: | This paper presents part of the study carried out at the Green Chemistry Research Center of the Karel de Grote University in Antwerp, as part of the intermediate internship at the École Nationale Supérieure en Génie des Technologies Industrielles (ENSGTI). The purpose of the study was to contribute to the proper and sustainable management of activated sludge from wastewater, based on the valorization of extracellular polymeric substances (EPS) extracted from secondary sludge for the manufacture of adhesives, given the amount of sugar and proteins present in this complex mixture of polymers. In this sense, the study sought to evaluate, using factorial planning, the influence of two additives (A and B) in the formulation of adhesives based on a fixed mass of EPS and water. To this end, EPS was extracted and characterized in activated sludge from two food companies located in Belgium. The influence of additives A and B in the formulation of adhesives was evaluated using a 2 2 factorial design, with duplicates for each formulation to estimate the experimental error, thus composing two variables (additive A and B) and two levels (maximum and minimum). The implications of the additives were statically analyzed as a function of the supported mass obtained in the strength test using the software Statistica 7.0. This analysis showed that using EPS from company 1, additive A was significant for the formulation (p-value= 0.001732). However, for EPS from company 2, none of the factors or combinations were significant for the results. In this sense, in addition to the significance of the factors, the study made it possible to question the influence of the qualitative characteristics of the EPS on the results, which should justify the disagreement of responses for EPSs of different origins. |
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