Abstract
The disposal of chemical waste and the precision of analyses of the neutral (NDF) and acid (ADF) detergent fiber contents were evaluated utilizing conventional (Van Soest) and alternative methods of analyses. The recovery of acetone promoted both economic and environmental gains, with a recovery rate of 84.12%. The precision of the analyses was not observed in most of the determinations with reutilization of chemical waste in all the analytical methods tested, in spite of promoting decrease in cost, time invested in the preparation of solutions and the disposal of chemical waste.
Highlights
The global question about the damage generated to the planet by the human activities has been an outstanding object in the media
Given that detergent solutions act as extractors, we proposed the recovery through simple filtering followed by monitoring of the pH in each analysis, for both the original and recovered solutions
The recovery of the detergent solutions minimized the expenditure of chemical reagents and the discard of the waste generated in the analyses
Summary
The global question about the damage generated to the planet by the human activities has been an outstanding object in the media In this context is the chemical waste generated by the industries, chemical laboratories and research institutes (BENDASSOLLI et al, 2005; GERBASE et al, 2006). In the routine of the animal nutrition laboratories we can observe a large-scale use of detergent solutions and acetone during the chemical analyses, especially for the determination of NDF and ADF. After bring used, these products generate chemical waste that is disposed in the environment in natura. Animal Sciences perform these analyses and are concerned with the sustainability of the planet (LENARDÃO et al, 2003)
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