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Previous issue date: 2014-02-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This research evaluated the microalgae removal produced in a
stabilization pond system using biofilters as post-treatment, besides
characterizing the effluents of stabilization ponds and filters in relation to
concentrations of algal biomass (chlorophyll a and suspended solids), organic
matter (BOD and COD), total phosphorus, orthophosphate, pH and dissolved
oxygen, and tried to correlate physicochemical parameters with chlorophyll "a".
It was held at the Ponta Negra ETE which is constituted by three stabilization
ponds, with a primary facultative pond and two of maturation. For the algae
removal were used two submerged bio-filters: the filter FPF (Facultative Pond
Filter), fed with facultative pond effluent; and the filter MPF (Maturation Pond
Filter), fed with second maturation pond effluent. The filling material of both
filters was predominantly gravel no. 2, although it contains portions of gravel no.
1 and no. 3. The filters operating conditions were bad, they were nearly 10
years without maintenance, without cleaning or removal of sludge since the time
of its construction, and part of the filling material may be obstruct. Despite poor
operating conditions were obtained satisfactory results, in level of posttreatment. Removal efficiencies in relation to BOD and COD were 7 and 25% in
FPF and 9 and 19% and in MPF, respectively. In relation to TSS efficiencies in
MPF and FPF were 37 and 20%, respectively. As for the chlorophyll "a"
removal, the FPF efficiency was 44% and the MPF was 40%. There was 50% of
consumption of dissolved oxygen, on average, within the filters. Two profiles
were performed in the filters, and it was possible to conclude that variations
throughout the day were not statistically significant, and that, regardless of the
time of collection, they would have the same representation comparing to the
time of data collection (7 am) and the daily average, although individual
variations throughout the day have been shown to be significant. Another
important observation is that the correlations between Chlorophyll a and TSS
were bigger and more significant in the effluent of the filters than in the effluent
of the ponds / A pesquisa avaliou a remo??o das microalgas produzidas em um
sistema de lagoas de estabiliza??o utilizando biofiltros como p?s-tratamento,
al?m de caracterizar os efluentes de lagoas de estabiliza??o e dos filtros no
tocante ?s concentra??es de biomassa algal (clorofila a e s?lidos suspensos),
mat?ria org?nica (DBO e DQO), ortofosfato, f?sforo total, pH e oxig?nio
dissolvido, e buscou correlacionar os par?metros f?sico-qu?micos com a clorofila
a . Foi realizada na ETE Ponta Negra que ? constitu?da por tr?s lagoas de
estabiliza??o, sendo uma lagoa facultativa prim?ria e duas de matura??o. Para
a remo??o das algas, foram utilizados dois biofiltros submersos: o filtro FLF -alimentado com efluente da lagoa facultativa; e o filtro FLM - alimentado com
efluente da segunda lagoa de matura??o. O material de enchimento de ambos
os filtros foi predominantemente brita n? 2, apesar de conter por??es de brita n?
1 e n? 3. As condi??es operacionais dos filtros eram p?ssimas, pois estavam h?
quase 10 anos sem manuten??o, sem limpeza ou remo??o do lodo desde a
?poca da constru??o, podendo parte do material de enchimento estar
colmatado. Apesar das condi??es operacionais prec?rias foram obtidos
resultados satisfat?rios, em n?vel de p?s-tratamento. As efici?ncias de remo??o
em rela??o ? DBO e DQO foram de 7 e 25% no FLF e 9 e 19% no FLM,
respectivamente. Em rela??o aos SST as efici?ncias no FLF e FLM foram de
37 e 20%, respectivamente. Quanto ? remo??o de clorofila a , a efici?ncia no
FLF foi de 44% e no FLM foi de 40%. Houve o consumo de 50% do oxig?nio
dissolvido, em m?dia, no interior dos filtros. Foram realizados dois perfis nos
filtros, e foi poss?vel concluir que as varia??es ao longo do dia n?o foram
estatisticamente significativas, e que, independentemente do hor?rio da coleta,
teriam a mesma representatividade ao comparar com o hor?rio da coleta da
pesquisa (7 horas da manh?) e a m?dia di?ria, embora as varia??es pontuais
ao longo do dia tenham se mostrado expressivas. Outra importante observa??o
foi que as correla??es entre Clorofila a e SST foram maiores e mais
significativas nos efluentes dos filtros do que nos efluentes das lagoas
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16011 |
| Date | 28 February 2014 |
| Creators | Queiroz, Mois?s Andrade de Farias |
| Contributors | CPF:05712939487, ANDRADE NETO, C?cero Onofre de, Ara?jo, Andr? Luis Calado, CPF:37695045268, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4799320A6, Santos, H?lio Rodrigues dos, CPF:75200252415, http://lattes.cnpq.br/9048384392428073, Oliveira, Rui de, CPF:06338275334, http://lattes.cnpq.br/0621382505832223, Andrade Neto, C?cero Onofre de |
| 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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