Nutritional and Protein Characterization of the Leachate Produced in the São Paulo Zoo Composting Unit

Introduction

In recent years the, Foundation Zoological Park of São Paulo (FZPSP) implemented and put into operation the Organic Composting Production Unit (OCPU). The main goal of this action was to give a new destination to the organic waste collected daily in the park since before that sustainable attitude, this waste had the same fate as the usual household waste: landfills. Currently, the composting produced in OCPU serves as fertilizer for the park gardens and food cultivation in the Rural Production Unit (UPR), where much of the food served to the animals in the Zoo (ZOO) and Zoo Safari comes from Bernal et al [1].
Leachate is a liquid residue of high organic contents and strong color produced during the percolation of water through the composted organic waste. During the passage of this water, various chemical, physico- chemical and fermentation processes occur concurrently and, for this reason, various organic and inorganic compounds, besides that microorganism and its metabolites can be transferred to the leachate. Thus, leachate from different sources can be considered as a distinct matrix with specific characteristics.
Currently, what is known of leachate are those generated in landfills that have a high toxic potential. But it can be considered that the one produced during the composting in FZPSP is different, due to the nature of the organic material and also the water used to cool the composters, which runs several times by the composting systems. Therefore, because there is very few information on leachates from different sources other than municipal landfills, by the differentiated characteristics of the process and also of the materials used during composting at OCPU there was interest in studying this particular leachate, the potential of this matrix in bringing nutritional and proteomic information.

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