Wastes Flow from wastewater treatment in the industrial sector of Cali urban and periurban area, free trade zone of Palmira and Yumbo

Abstract

This paper presents the research carried out regarding the management of waste (known in this case as sludge and grease) from the treatment of industrial and domestic wastewater from companies located in the industrial zone of Cali, urban and peri-urban area, and free trade zone. municipality of Palmira and Yumbo. Two stages were developed whose objectives were respectively: 1) to identify the generators of sludge and grease, and 2) to demonstrate the management practices by the managers (companies that provide the service of maintenance, collection and / or treatment of waste generated). At the end of these stages, the flow of these wastes was elaborated in the study area. This allowed us to obtain a compilation of data that describes the way in which the management of this type of waste occurs to generate a vision of the problem in the Valle del Cauca, as a basis for future research on providing technical solutions for handling these. For the year 2014, around 921 industries were found in the study area, of which 85 had wastewater treatment systems (therefore, they are waste generators). On the other hand, 85 waste managers were identified. In this research, 22 industries accepted to participate as well as 5 waste managers. The approximate volume of mud and grease generated by these companies is 367.89 ton / month. Of this amount, only 158.7 ton / month (43%) is used as a soil conditioner, fertilizer, humus or for the substitution of raw materials. In spite of some of the sludge is used, in conclusion, it was identified that environmental policies are required that encourage these alternatives to reduce the impacts on the environment.