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Previous issue date: 2014-03-07 / In the state of Rio Grande do Norte (RN), Brazil, there are about 80 sewage
treatment systems being the predominant technology waste stabilization ponds. The
Baldo s WWTP , due to its location and low availability of area, was designed as a
hybrid conventional system (UASB reactor followed by activated sludge with
biodiscs) at a tertiary level, being the most advanced WWTP in the State and also
with the larger treatment capacity (1620 m3/h) .The paper presents the results of its
performance based on samples collections from May to December 2012. Composite
samples of the effluent of the grit chamber, UASB reactors, anoxic chambers,
aeration tanks and treated effluent were collected weekly, every 4 hours for 24 hours.
The results showed that the WWTP effluent presented adequate ranges of
temperatures, pH and DO, however removal efficiencies of BOD and TSS were
below the predicted by design. The UASB reactors also showed removals of BOD
and TSS less than expected, due to the accumulation of sludge in the reactors, which
eventually, was washed out in the effluent. The nitrification process was not
satisfactory mainly due to problems in the oxygen distribution in the aeration tanks.
The removal of ammonia and TKN were high, probably by the assimilation process / No Rio Grande do Norte (RN), Brasil existe cerca de 80 sistemas de tratamento de
esgotos sendo a tecnologia das lagoas de estabiliza??o a predominantemente
utilizada. A ETE do Baldo, devido a sua localiza??o e disponibilidade de ?rea foi
concebida como um sistema convencional h?brido (UASB lodos ativados com
biodiscos) em n?vel terci?rio, sendo a ETE mais avan?ada do Estado e com maior
capacidade de tratamento (1620 m
3
/h). O trabalho apresenta os resultados do seu
monitoramento, atrav?s de coletas realizadas semanalmente no per?odo de junho a
dezembro de 2012, com base em amostras compostas coletadas a cada 4 horas,
durante 24 horas, do efluente da caixa de areia, reatores UASB, c?maras an?xicas,
tanques de aera??o e efluente tratado. Os resultados mostraram que a ETE
apresentou efluentes com temperaturas, pH e OD adequados, entretanto efici?ncias
abaixo do projetado para os par?metros DBO e SST. Os reatores UASB tamb?m
apresentaram remo??es de DBO e SST abaixo do esperado, devido ao ac?mulo de
lodo nos reatores, uma vez que, este era expelido no efluente. O processo de
nitrifica??o n?o foi satisfat?rio, pelas baixas concentra??es de nitrato encontradas
nos efluentes dos tanques de aera??o, provavelmente por problemas no sistema de
aera??o. As remo??es de am?nia e NTK foram altas, provavelmente pelo processo
de assimila??o
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16013 |
| Date | 07 March 2014 |
| Creators | Ferraz, Danillo Luiz de Magalh?es |
| Contributors | CPF:37695045268, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4799320A6, Santos, H?lio Rodrigues dos, CPF:75200252415, http://lattes.cnpq.br/9048384392428073, Cunha, Paulo Eduardo Vieira, CPF:03090194430, http://lattes.cnpq.br/8375470571725379, Ara?jo, Andr? Luis Calado |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-gradua??o em Engenharia Sanit?ria, UFRN, BR, Saneamento Ambiental; Meio Ambiente; Recursos H?dricos e Hidr?ulica |
| 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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