Abstract

FORUNDA-ZAPATA, KEVIN et al. Effect Of Grass Star Incorporation On The Composting Biowaste Process And On The Quality Of The Product. Rev.EIA.Esc.Ing.Antioq [online]. 2020, vol.17, n.33, pp.141-151. ISSN 1794-1237.  https://doi.org/10.24050/reia.v17i33.1352.

The predominantly organic composition of biowaste (BW) present in municipal solid wastes, enhances its use through composting; however, these present physicochemical deficiencies that can be mitigated with the incorporation of conditioning materials as the support materials (SM). On this study, it was evaluated the effect of the incorporation of star grass (SG) on BW composting in four BW:SG ratios (A0-100: 00, A1-90: 10, A2-80: 20, A3-70: 30), showing favorable effects with respect to A0 (100% BOM). A2 maintained the highest temperatures; A2 and A3 recorded the greatest reduction of volatile solids (VS) and final concentration of total nitrogen (TN). The final products of A2 and A3 also presented better quality in terms of cation exchange capacity, nutrient content (total phosphorus, potassium and nitrogen), bulk density, moisture retention capacity and organic matter content; being A2 product, the material with highest agronomic value, in accordance with Colombian Technical Standard. Proportions less or equal to the one evaluated in A1, do not have a significant effect on the process and quality of the final product and, proportions greater than A3 could favor the loss of nitrogen due to the increase in porosity, thus decreasing the agricultural value of the product.

Keywords : Biowaste; Composting; Co-composting; Star Grass; Support material.

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