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Previous issue date: 2016-07-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os concentrados de membranas resultantes do tratamento de esgotos sanit?rios possuem potencial para serem utilizados como fertilizante, devido a concentra??o de nutrientes presente. Al?m de contribuir para o gerenciamento desses concentrados, que causam impacto quando dispostos inadequadamente no meio ambiente, a utiliza??o na agricultura faz uso dos nutrientes, principalmente Nitrog?nio e F?sforo, que s?o necess?rios para nutri??o vegetal. Nesse sentido, membranas de nanofiltra??o e osmose inversa foram utilizadas para concentrar os nutrientes de esgoto sanit?rio biologicamente tratado atrav?s do modo de recircula??o do concentrado ao tanque de alimenta??o, afim de obter um concentrado rico em nutrientes de forma que fosse comparado a um fertilizante mineral l?quido comercial. Foram realizados experimentos com e sem recircula??o do concentrado e coletadas al?quotas do permeado e concentrado para caracteriza??o f?sico-qu?mica, al?m de medi??es de fluxo com o tempo. Os resultados mostraram que as concentra??es dos nutrientes dos concentrados das membranas foram estatisticamente inferiores aos padr?es m?nimos estabelecidos para que um fertilizante l?quido possa ser comercializado para aplica??o no solo. Al?m disso, o fluxo e a qualidade final dos permeados foram influenciados negativamente pelo processo de concentra??o. Apesar de n?o serem considerados adubos l?quidos comerciais para aplica??o no solo, de acordo com a Instru??o Normativa vigente, os concentrados das membranas podem ser utilizados como fertilizante para cultivo hidrop?nico ou solu??o para pronto uso, j? que para esses casos as concentra??es m?nimas exigidas dependem do fabricante. / Membranes concentrates, obtained from sewage treatment, have potential for use as fertilizer due its concentration of nutrients, as well as contribute to the management of these concentrates. This concentrates may cause serious impacts when disposed improperly in the environment. Agricultural uses the nutrients, mainly Nitrogen and Phosphorus, which are necessary for plant nutrition. In these terms, nanofiltration and reverse osmosis membranes were used to concentrate the sewage nutrients treated biologically through recirculation mode to the feed tank, in order to obtain a concentrate rich in nutrient in order to be compared to a commercial liquid mineral fertilizer. Experiments were performed with and without the concentrate recirculation and collected permeate and concentrated aliquots for physicochemical characterization and flow measurements over time. The results showed that the concentration of the nutrients in membranes concentrates were statistically lower than the minimum standards set for a liquid fertilizer that can be marketed for soil application. Furthermore, the concentration process negatively influenced the flow and quality of the final permeated, although commercial liquid fertilizers are not considered for soil applications, according to the current Instruction Normative, concentrated in membranes can be used as fertilizer for hydroponics or solution for ready use, since is such cases the minimum concentrations requirements depend on the manufacturer.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21480 |
| Date | 15 July 2016 |
| Creators | Ferreira, Larissa Caroline Saraiva |
| Contributors | 05712939487, Tinoco, Juliana Delgado, 56583354420, Duarte, Marco Ant?nio Calazans, 20175892415, Ara?jo, Andr? Luis Calado, Andrade Neto, Cicero Onofre de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA SANIT?RIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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