Use of recycled diatomaceous earth from breweries as a means of transporting of macronutrients
Gabriel Peña-Rodríguez- Marlon Rodríguez
- Ever Adrian Becerra
- Xandro Miguel Caballero
- Héctor Jaime Dulce Moreno
Published 2019-09-16
Keywords
- diatomaceous earth,
- macronutrients NPK,
- Electrical conductivity (EC),
- total dissolved solids (TDS)
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Copyright (c) 2019 Revista UIS Ingenierías
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
Abstract
It is reported the physical-chemical characterization of recycled diatomaceous earth from the brewing industry, and its use as a means of transport of macronutrients (Nitrogen, Phosphorus, Potassium (NPK)), in order to provide an environmentally friendly alternative to the waste generated in the subprocess of the beer filtration. For the conformation of the samples (pellets) by extrusion, carboxymethyl cellulose (CMC) and corn starch were used to binders, while the wetting was carried out using a commercial liquid solution with 15% NPK, in low, medium and high concentration, which was added during the pellet forming process. The chemical characterization of the samples was done using atomic absorption spectroscopy (AA), and microanalysis by dispersed energy spectroscopy (EDS), the surface morphology was studied using scanning electron microscopy (SEM). The behavior of the macronutrient return capacity to an aqueous medium was carried out by means of the analysis of the electrical conductivity (EC) and total dissolved solids (TDS) as a function of time using the SI Analytics 680 K multiparameter. It was found that the sample that did not present loss of its structure in aqueous medium was formed by 60% of diatomite, 10% of CMC and 30% of corn starch (%w/w). Also the increase in the time of the EC and TDS of the aqueous solution when the activated pellets were submerged was observed, inferring that these are a good means of transporting macronutrients, which can be used as fertilizer in agricultural applications contributing to the environment.
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References
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