1. Introduction
The slaughterhouse industry is a very old human activity and, although it is still a relatively small scale
industrial sector, its environmental impact has grown considerably due to the increase in plant production.
The wastewater generated in meat processing plants contains high amounts of biodegradable organic
matters, usually varying from 1100 to 2400 mg /L in terms of BOD5, with the soluble fraction varying
between 40% and 60%. The insoluble fraction is formed by colloidal and suspended matters, in the form