Reuse of treated sewage effluent in airports : irrigation of ornamental plant nursery.
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Data
2013
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Resumo
Airports consume significant amounts of water which can be compared to the
volume consumed by mid-size cities, thus practices aimed at reducing water
consumption are important and necessary. The objective of this study was to
assess the reuse potential of sewage effluent produced at a mid-size
international airport for nursery irrigation. The sewage treatment system
consisted of a facultative pond followed by a constructed wetland, which were
monitored during one hydrological year and the parameters COD, pH, solids,
nitrogen, phosphorus and Escherichia coli were analyzed. Removal efficiencies
of 85% and 91% were achieved for COD and solids, respectively. Removal
efficiencies for ammonia nitrogen and total phosphorus were 77% and 59%,
respectively. In terms of E. coli concentration, the treated effluent met the
recommendations by the World Health Organization for reuse in irrigation with
the advantage of providing high levels of residual nutrient. The ornamental
species Impatiens walleriana was irrigated with treated sewage effluent and
plant growth characteristics were evaluated. The experiment showed that reuse
can enhance plant growth without significantly affecting leaf tissue and soil
characteristics. This study highlighted the importance of simple technologies for
sewage treatment especially in countries which still do not present great
investment in sanitation and proved that effluent reuse for landscape irrigation
can provide great savings of water and financial resources for airport
environments.
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Airport environments, Reuse, Constructed wetlands, Ornamental plant
Citação
COUTO, E. de A. do et al. Reuse of treated sewage effluent in airports: irrigation of ornamental plant nursery. Journal of Urban and Environmental Engineering, v. 7, p. 264-273, 2013. Disponível em: <http://periodicos.ufpb.br/index.php/juee/article/view/15483>. Acesso em: 20 jul. 2017.