Composting as an Alternative for the Treatment of Solid Waste from the Kraft Pulp Industry

Primer Autor
Zambrano Riquelme, Marcia
Co-autores
Rodriguez-Luna, Dante
Alcala, Francisco Javier
Rubilar, Olga
Alvear, Marysol
Encina-Montoya, Francisco
Vidal, Gladys
Título
Composting as an Alternative for the Treatment of Solid Waste from the Kraft Pulp Industry
Editorial
MDPI
Revista
AGRONOMY-BASEL
Lenguaje
en
Resumen
The increasing industrial pulp production has led to a negative growth of the associated solid wastes, thus making necessary alternative ways of handling them in suitable sanitary landfills to minimize adverse effects on the environment and well-being of people. Solid waste treatment prior to its disposal is a target to minimize pollution of the natural resources (air, soil, water) due to accidental leaching. This paper aims to determine better experimental conditions in the container to develop an optimal composting design for pulp solid wastes. For this, an experimental methodology is introduced. This paper presents the results about the influence of independent control variables (grits addition and composting process time) on dependent variables (chemical and biological), for which a composting design was used, and a face-centered central composite factor was applied. The results showed mature compost over 60-day treatment, with the following experimental observations (i) the grits addition did not decrease the pH in the first stage of the composting process, and (ii) the microbial activities were high during the active stage of the composting progress and evolved to stable, lower values together with a proper trend of N-NH4+ and N-NO3- at the end. Grits addition of around 6% is the optimal experimental amount to use for the composting process of the secondary sludge from the Kraft mill industry. In conclusion, treating secondary sludges and grit residues from the Kraft mill industry to produce compost is feasible and sustainable. This action reduces the environmental pollution risk (evidenced by soil pH change and possible water pollution) and improves the soil assimilation capability of inorganic micronutrients and organic compounds after application. Thus, the controlled waste reuse will pass from a negative input to the environment to a positive, sustainable solution, which can be used as a soil-nutrient improver in agriculture.
Fecha Publicación
2023
Tipo de Recurso
artículo original
doi
10.3390/agronomy13041099
Formato Recurso
PDF
Palabras Claves
grits
composting process
kraft mill
soil improver
Ubicación del archivo
Categoría OCDE
Agricultura
Ciencias Vegetales
Materias
sémola
proceso de compostaje
fábrica de papel kraft
mejorador del suelo
Identificador del recurso (Mandatado-único)
artículo original
Versión del recurso (Recomendado-único)
versión publicada
License
CC BY 4.0
Condición de la licencia (Recomendado-repetible)
CC BY 4.0
Derechos de acceso
acceso abierto
Access Rights
acceso abierto
Id de Web of Science
WOS:000979622500001
Tipo de ruta
verde# dorado
Categoría WOS
Agricultura
Ciencias Vegetales
Referencia del Financiador (Mandatado si es aplicable-repetible)
UFRO EP-DI14-0079
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