Controlled disposal of effluent domestic sewage in the ground a study of the reduction of fecal coliforms / Disposição no solo de efluentes de esgoto tratado visando a redução de coliformes termotolerantes

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

12/09/2008

RESUMO

The indiscriminate launching in the water courses of sewers domestic without treatment, or exactly treat, but without appropriate disinfection, contributes with significant amount of organisms of the called "coliform group", between which specific agents of illnesses of water propagation can be present. The application of the effluent in the ground, instead of its direct disposal in water courses, beyond being an alternative way for the disposal of residues and biological control of pollutants, constitutes an adequate way of supply of nutrients to the ground and plants. So, this work had as objective to evaluate the reduction of fecal coliforms, after controlled applications of effluent in ground cultivated, associating the values gotten to the increase of fluorescent rhizobacterias Pseudomonas and Bacillus spp. presents in the rhizospheres of different cultures. The project was developed in conditions of field in area of the Pilot Farm of Department of Agrarian Sciences of the University of Taubaté, city of Taubaté, SP. The Experimental Delineation consisted of some blocks, with five treatments composites for culture of annual species: Oats, Barley, Wheat, Black Beans and ground without culture (as Witness) and four repetitions, totalizing 20 ground parcels with area of 2m x 1m and space among them of 50cm. Controlled applications of effluent had been carried through in Red - Yellow Latossolo, in intervals of 20 days for a period of sixty days. From 60 days had been registered in all the treatments reduction of high values base 106 to high values base 103. One concludes that the technique of controlled application of effluent in ground cultivated revealed efficient in the reduction of fecal coliforms, however, for a conclusive evaluation of the capacity-support of the ground and performance of the rhizospheres of cultures, it becomes necessary the continuity of the experiment for a bigger period of applications, as well as, the job of other vegetal species in the treatment of domestic sewers.

ASSUNTO(S)

microbiologia agricola bacillus pseudomonas coliformes termotolerantes esgoto fitorremediação disposição de efluentes application in the ground sewage wastewater coliforms rhizobacterias

ACESSO AO ARTIGO

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