Physicochemical and microbiological characterization of organic waste generated in a marketplace in Bogotá

Abstract

The generation of waste is a problem that affects the population at a global and local level, which is why the search for alternative use has become a recurring source of study in recent decades. Taking into account that approximately 9 million plant waste is generated in Colombia, that the marketplaces in Bogotá are one of the largest generators of this type of waste and that the strategies for its use are scarce, this study has proposed the preliminary physicochemical and microbiological characterization of organic waste generated in a market place, with the aim of establishing biotechnological alternatives for its use. The characterization was carried out on six different types of waste, collected from the Restrepo marketplace - Bogotá D.C. At
the physicochemical level, the percentage of moisture, ash, nitrogen, and proteins was determined. For the microbiological evaluation, the count of total, amylolytic, cellulolytic, ligninolytic, lipolytic and proteolytic bacteria was performed. It was found that the percentage of humidity of the waste was between 64.1209%misand 89.3089%, that of ashes between 0.4614% and 1.6517%, that of nitrogen was from 0.0976% to 0.2375% and that of proteins from 0.6098% to 1.4845%. The count for total mesophilic bacteria was 3.7x108 CFU / g. Lipolytic bacteria had the highest concentration (2.3x108 CFU / g), while proteolytic bacteria had the lowest count (1.3x108 CFU / g). Of the bacteria isolated from the residues, 24 proteolytic, 11 cellulolytic and 4 amylolytic strains were selected.