Desempenho do leito cultivado no tratamento de efluentes gerado em uma instituição de ensino

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

30/06/2010

RESUMO

The utilization of natural methods to reduce pollutants, like wetland, has shown satisfactory results which make it viable for different segments of society. Educational institutions have academic calendars that include long periods of recess which takes the flow of sewage systems practically zero causing serious damage both for microorganisms as for the associated macrophytes. The present study had as it goal to evaluate the wetland system efficiency, after the recess period of an educational institution, checking if it showed signs of recovery without any intervention, and then with a maintenance. In order to evaluate the efficiency of the wetland pool the adopted methodology was based on physico-chemical and microbiological parameters of water analysis in a subsurface flow system. The removal efficiency for the parameters of turbidity, NH3, NO3- and phosphorus were respectively 63%, 21.69%, 31.05% and 20.27%, for DBO, DQO and thermotolerant coliforms the several values of average efficiency were 45.99%, 29.72% and 44.01%. If it was considered only the period after intervention, the results get better, being the following: turbidity=78,17%, NH3=37,95%, NO3 -=53,18%, phosphorus=25.56%, DBO=66.15%, DQO=36.50% and thermotolerant coliforms=60.72%. The results show the importance of vegetation on the quality of efficiency of this kind of system.

ASSUNTO(S)

wetlands construídos esgotos domésticos saneamento ambiental leitos cultivados wetlands constructed wetlands domestic sewage environmental sanitation tratamento de aguas de abastecimento e residuarias

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