Hybrid solar drying of sludge from kraft pulp mills
Source abstract
Abstract
Abstract Sludge generated from kraft pulp mill wastewater treatment plants (WWTPs) is typically non-inert solid waste and is commonly disposed of in landfills. In this study, a novel approach for repurposing WWTP sludge from a kraft pulp mill in Brazil for energy generation was assessed. With the global cellulose market projected to reach $ 61 billion by 2033, there is a growing need for sustainable energy solutions and disposal of associated industrial byproducts. This study investigated the performance of a hybrid active solar dryer for reducing the moisture content of sludge to enhance the feasibility of sludge burning in a biomass boiler. Through rigorous experimentation and design of experiments (DOE) planning, optimal parameters for the hybrid dryer were determined, specifically, a volumetric airflow rate of 1.1 m/s and an entrance temperature of approximately 51 °C. This innovative approach not only addresses the environmental concerns associated with sludge disposal, but also contributes to the broader goal of advancing sustainable technologies in the midst of global energy challenges.
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Research context
OpenAlex topics: Solar Thermal and Photovoltaic Systems · Solar-Powered Water Purification Methods · Food Drying and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Pure and Applied Sciences , 28094 Federal University of Itajubá , Rua Irmã Ivone Drumond, 200 – Industrial District II , MG 35903-087, Itabira , Brazil
Department of Environmental Engineering , Federal University of Minas Gerais , Av. Antônio Carlos 6627 , MG 31270-901, Belo Horizonte , Brazil
School of Energy Systems , LUT University , Yliopistonkatu 34 , FI-53850 Lappeenranta , Finland
Department of Materials Engineering , Federal University of the Jequitinhonha and Mucuri Valleys , Campus Janaúba, Av. Um 4050, University City , MG 39447-901 , Janaúba , Brazil
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