Eficiência de uma ETE em escala real composta por reator UASB seguido de lodo ativado
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 reac...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/16013 |
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| Resumo: | 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 |
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