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Previous issue date: 2014-09-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / A contamina??o dos mananciais de abastecimento p?blico de ?gua por res?duos
originados pelas atividades antr?picas vem trazendo diversos riscos para a sa?de
humana. Dentre as consequ?ncias de contaminantes pode-se destacar a flora??o de
microalgas e cianobact?rias, que t?m o potencial de produzir toxinas perigosas para os
seres humanos, e a presen?a de subst?ncias h?micas que s?o geradas pela
decomposi??o da mat?ria org?nica natural (MON), tal como a vegeta??o, que quando
encontradas em mananciais para abastecimento p?blico, apresentam aspectos
negativos conferindo cor elevada, odor e sabor. A tecnologia de dupla filtra??o apresenta
boa efici?ncia em ?guas com presen?a de cianobact?rias e varia??es distintas de
qualidade. Portanto, este trabalho teve como objetivo avaliar o comportamento da
t?cnica de dupla filtra??o com pr?-oxida??o, para a potabiliza??o da ?gua da Lagoa de
Extremoz-RN, que atualmente apresenta concentra??es elevadas de cianobact?rias. A
pesquisa se resumiu em quatro fases. A primeira fase voltou-se para ensaios est?ticos
em equipamento de jarteste em laborat?rio e as fases subsequentes foram testadas em
uma Instala??o Piloto de Dupla Filtra??o. Para a segunda e terceira fase foram testadas
taxas de filtra??o de 120 e 180 m3
/m2
.dia para filtros ascendentes de pedregulhos e 160
e 240 m3
/m2
.dia filtros r?pidos descendentes de areia. A ?ltima fase objetivou avaliar a
dupla filtra??o com pr?-oxida??o. Os resultados encontrados na instala??o piloto de
dupla filtra??o demonstraram que o filtro ascendente de pedregulho 4, que apresentava
a menor granulometria, demonstrou a melhor efici?ncia e as melhores m?dias de turbidez
e cor aparente. O Filtro r?pido descendente de areia 1 foi mais eficiente na remo??o de
turbidez alcan?ando remo??o em torno de 100%. Portanto, comprovou-se que quanto
menor a granulometria dos filtros, maior a efici?ncia de remo??o de turbidez. O uso da
pr?-oxida??o favoreceu a remo??o de cor no final dos ensaios, chegando a um
percentual de remo??o em torno de 60%. Com rela??o ? remo??o da turbidez, a t?cnica
de dupla filtra??o se mostrou eficiente. Por?m a remo??o de cor e de cianotoxinas
presentes na ?gua s? foi eficiente com o aux?lio de um oxidante / The contamination of water sources of public drinking by waste originated by
anthropogenic activities has brought various risks to human health. Among the
consequences of such activities can highlight the bloom of microalgae and cyanobacteria,
which have the potential to produce toxins dangerous to humans, and the presence of
humic substances that are generated by the decomposition of natural organic matter
(NOM), such as vegetation. When found in water sources for public supply, present
negative aspects conferring high color, odor and taste. The double filtration technology
has good efficiency in water with the presence of cyanobacteria and different quality
variations. Therefore, this study aimed to evaluate the behavior of the technique of double
filtration with pre-oxidation for water purifiers the lagoon of Extremoz-RN, which currently
has high concentrations of cyanobacteria. The research is summarized in four phases:
the first phase turned to static tests in jarteste equipment in the laboratory and subsequent
phases were tested in the Pilot Plant of Double Filtration. For the second and third stage
filtration rates were tested filtration rates of 120 and 180 m3
/ m2
.day for ascending
boulders filters and 160 and 240 m3
/ m2
.day in the filters in quick sand descendants. The
last phase aimed to evaluate the double filtration with pre-oxidation. The results
demonstrated that the system could produce double filtration in all trials of good quality
water according to the Decree n?. 2914/11 of the Ministry of Health. The use of preoxidation
favored the removal of microcystin and color at the end of the tests, reaching a
percentage of color removal around 60%. The analysis of variance in the data, enabled
prove that the filtration rates of 180 m3 / m2.d the gravel filter and 240 m3
/m2
.d in rapid
filters, were the most significant for the removal of turbidity. The ascending filter of boulder
4 with particle size finer filter layer showed the best performance and the best means of
turbidity and apparent color. The rapid filter downward 1 was more efficient in removing
turbidity reaching removal about 100%
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19601 |
| Date | 30 September 2014 |
| Creators | Cirne, Jos? Raniery Rodrigues |
| Contributors | 37695045268, http://lattes.cnpq.br/7133712883742750, Andrade Neto, C?cero Onofre de, 05712939487, http://lattes.cnpq.br/9961536190401150, Duarte, Marco Ant?nio Calazans, 20175892415, http://lattes.cnpq.br/2873012508496409, Ferreira, Weruska Brasileiro, 79953697434, http://lattes.cnpq.br/5630172788119332, Ara?jo, Andr? Luis Calado |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA SANIT?RIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| 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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