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Previous issue date: 2008-08-05 / The WTP produce many kinds of residue on your treatment stages, but the sludge is the more
problematic from the final disposition point view. The actual rate of residue production deriving from technological evolution and the crescent population needs prevents the subtle equilibrium generation between consumption and recycling/reuse, creating problems of
pollution resulting from inappropriate management of residues. Thus, is necessary achieve a new equilibrium between the grow from raw materials and energy and the residue generation. This equilibrium should be achieved by technical and economic feasibility of environmental
supported models through recycling and reuse. The red ceramic industry stand out in residue absorption question as raw material due their clay mass heterogeneity, constituted by clay minerals and non-clay minerals with wide mineralogical variation, allowing residue inclusion
which act like plastic or non-plastic materials, contributing to retain heavy metals contained in residues in the vitreous mass formed during the burning of the ceramic bodies. This work propose the study of the influence of incorporation of 25 wt.% sludge from wastewater
treatment plant, according preliminary results, in the mass to produce ceramic bodies. The raw materials was characterized through chemical composition analyses by XRF, mineralogical analyses by XRD, thermal analyses by TG and DTA, Atterberg limits and thermodilatometry. Subsequently was composed the mass with 75 wt.% of clay and 25 wt.% of dried wastewater sludge from UFRN WWTP. Samples with 6,0 x 2,0 x 0,5 cm was produced with unidirectional compacting under pressure of 20MPa and burned in temperatures between 950 and 1,200?C. After fired, the ceramic bodies have been submitted
to physical and mechanical analyses through the measure of firing shrinkage, water absorption, density, apparent porosity and flexural strength; crystallographic analyses through XRD and microstructure analyses by SEM. The technological properties obtained was satisfactory to production of roof tiles with 25 wt.% at 1,200 ?C, but the production of others products at lower temperatures was not feasible / As ETE produzem v?rios tipos de res?duos em suas etapas de tratamento, mas o lodo ? o res?duo mais problem?tico do ponto de vista de disposi??o final. A atual taxa de gera??o de res?duos, acarretada da evolu??o tecnol?gica e da crescente demanda populacional, impede a gera??o de um equil?brio h?bil entre o consumo e a reciclagem/reuso, gerando problemas de polui??o resultantes da gest?o inadequada dos res?duos. Dessa forma, ? necess?rio atingir um novo equil?brio entre o crescimento das demandas por mat?rias e energia e a gera??o de res?duos. Este equil?brio, s? pode ser alcan?ado atrav?s da viabiliza??o t?cnica e econ?mica
de modelos de sustentabilidade ambiental, atrav?s da reciclagem e do reuso. A ind?stria de cer?mica vermelha se destaca no quesito absor??o de res?duos como mat?ria-prima em virtude da heterogeneidade das massas argilosas, constitu?das de argilominerais e minerais n?o argilosos com ampla varia??o mineral?gica, permitindo a inclus?o de res?duos que atuem como plastificantes ou desplastificantes, e contribuindo tamb?m para a reten??o de metais pesados presentes nos res?duos na massa v?trea formada nos corpos cer?micos. Este trabalho prop?e estudar a influ?ncia da incorpora??o de 25% de lodo de esta??o de tratamento de esgoto, baseado em resultados preliminares, ? massa para produ??o de corpos cer?micos. As mat?rias-primas foram caracterizadas atrav?s de an?lise da composi??o qu?mica por FRX, an?lise mineral?gica por DRX, an?lise t?rmica por TG e DTA, an?lise dos limites de Atterberg e an?lise dilatom?trica. Em seguida foi composta a massa com 75% de argila e 25% em peso de lodo da ETE UFRN. Foram prensados corpos-de-prova com dimens?es 6,0 x 2,0
x 0,5 cm atrav?s de prensagem uniaxial sob press?o de 20MPa e queimadas nas temperaturas entre 950 e 1200?C. Ap?s a sinteriza??o, os corpos-de-prova foram submetidos a ensaios f?sico-mec?nicos atrav?s de medida de retra??o linear, absor??o de ?gua, massa espec?fica
aparente, porosidade aparente e tens?o de ruptura ? flex?o; an?lise cristalogr?fica atrav?s de DRX e an?lise microestrutural atrav?s de MEV. As propriedades tecnol?gicas obtidas mostraram-se satisfat?rias para fabrica??o de telhas com 25% de lodo na temperatura de
queima de 1.200 ?C, n?o sendo vi?vel a fabrica??o de outros produtos em temperaturas inferiores
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12670 |
| Date | 05 August 2008 |
| Creators | Ara?jo, Franciolli da Silva Dantas de |
| Contributors | CPF:50580396720, http://lattes.cnpq.br/5460040602567184, Gomes, Uilame Umbelino, CPF:05012180410, http://lattes.cnpq.br/9858094266525225, Diniz, Marcus Alexandre, CPF:72173106449, http://lattes.cnpq.br/5997887290230186, Paes J?nior, Herval Ramos, CPF:56172559753, http://lattes.cnpq.br/9034804887420018, Acchar, Wilson |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia de Materiais, UFRN, BR, Processamento de Materiais a partir do P?; Pol?meros e Comp?sitos; Processamento de Materiais a part |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| 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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