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Chemical Characterization Of The Wastewater Of Frog Production

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  034157,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13899) @2003
Authors:   Ricardo Brauer Vigoderis, Marcelo Bastos Cordeiro, Ilda Fátima Tinôco, Antonio Teixeira de Matos, Oswaldo Pinto Filho
Keywords:   Frog production, wastewater, environment pollution

In the decade of 90 there was reduction in the number of facilities for the production of frogs in Brazil, although it has had significant increase of the production, since the medium production of the frog facilities that was from 40 to 100 kg a month, it started to be from 200 to 300 kg. That increase was attributed to the improvements in the facilities, more appropriate rations, use of greenhouses for the maintenance of the temperature, creation of animal indexes and larger knowledge of the animal and of production. Among the existent production systems, It stands out the Anfigranja system. The handling of that system, in the section of it recreates, it implicates in an or more daily renewals of water, depending on some factors as thermal atmosphere, production apprenticeship, ration type, among other, generating an amount reasonable wastewaters. Such wastewaters are, usually, thrown in the rivers without a previous treatment, causing several damages to the environment. Scarce they are the works of characterization of the wastewaters of the frog production, consequently is an ignorance of it pollution degree, provoked by this activity. In agreement with the obtained results it could be verified that the wastewater originating from the system of production of frogs in study, presents values of BOD and QOD above the acceptable for release in courses of water, needing a system of previous treatment. In general, all of the analyzed parameters, for unit of animal weight, followed a decreasing tendency with the increase of the medium weight of animals. the values showed that the animals with smaller weight producted larger amount of residues, for unit of weight, since the production of pollutants stayed higher when the load was divided by the corporal weight of the frogs.

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