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Dissertação
Cenário das outorgas de lançamento de esgoto concedidas em Belém-Pa
Conditions of effluent disposal grants authorized by the Department of Environment and Sustainability (SEMAS) of the Municipality of Belém PA, Brazil, between 2013 and 2016, are analyzed. Current study is divided into three parts: (1) collection of data retrieved from the Department; (2) preparat...
Autor principal: | RODRIGUES, Suzana Teixeira |
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Grau: | Dissertação |
Idioma: | por |
Publicado em: |
Universidade Federal do Pará
2018
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Assuntos: | |
Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/10184 |
Resumo: |
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Conditions of effluent disposal grants authorized by the Department of Environment
and Sustainability (SEMAS) of the Municipality of Belém PA, Brazil, between 2013
and 2016, are analyzed. Current study is divided into three parts: (1) collection of
data retrieved from the Department; (2) preparation of a map showing effluent
disposal grant sites at present; (3) number of non-computerized effluent discharges
for each urban water basin in the municipality of Belém. Results showed that there
are 24 effluent water disposal grants in the municipality of Belém: 62.5% are effluent
disposal grants to residential housing estates; 25% are effluent disposal grants for
industries; 12.5% are effluent disposal grants for other sectors, including hospitals
and airport. The water resource with the greatest number of disposal sites is the
Igarapé/Canal de Val-de-Cans, with five effluent disposal grant sites, followed by
Igarapé São Joaquim/São Raimundo, with four effluent disposal grant sites. Very few
effluents are treated at tertiary level, with disinfection prior to release in the water
body. In fact, most Treatment Stations lie at the secondary level, since only organic
matter is removed. However, enterprises with septic tanks and filters are still extant.
Results also demonstrate that the urban water basin with the greatest unaccountable
effluent discharge is the Bacia do Una, with 44,680.32 m³/day, followed by the Bacia
do Outeiro, with 28,567.20 m³/day. Data are the SEMAS´s official numbers and they
do not reveal the true conditions of the water bodies. In fact, there are several other
effluent discharges which have not been regulated by the department and which
contribute towards unbridled pollution caused by sheer lack of a comprehensive
sewerage system in the municipality of Belém. |