Hybrid solar drying of sludge from kraft pulp mills

IF 0.9 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-05 DOI:10.1515/npprj-2023-0094

Lindomar Matias Gonçalves, Clara Mendoza-Martinez, Jesús Nuncira, Elém Patrícia Alves Rocha, Eduardo Coutinho de Paula, Marcelo Cardoso

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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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混合太阳能干燥牛皮纸浆厂污泥

牛皮纸浆厂废水处理厂（WWTP）产生的污泥通常是非惰性固体废物，通常被填埋处理。本研究评估了将巴西一家牛皮浆厂废水处理厂污泥重新用于能源生产的新方法。预计到 2033 年，全球纤维素市场规模将达到 610 亿美元，因此对可持续能源解决方案和相关工业副产品处理的需求日益增长。本研究调查了混合型活性太阳能干燥器的性能，该干燥器用于降低污泥的含水量，以提高污泥在生物质锅炉中燃烧的可行性。通过严格的实验和实验设计（DOE）规划，确定了混合干燥器的最佳参数，特别是 1.1 m/s 的容积气流速率和约 51 °C 的入口温度。这种创新方法不仅解决了与污泥处置相关的环境问题，还有助于实现在全球能源挑战中推进可持续技术的更广泛目标。

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来源期刊

Nordic Pulp & Paper Research Journal 工程技术-材料科学：纸与木材

CiteScore

2.50

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Nordic Pulp & Paper Research Journal (NPPRJ) is a peer-reviewed, international scientific journal covering to-date science and technology research in the areas of wood-based biomass: Pulp and paper: products and processes Wood constituents: characterization and nanotechnologies Bio-refining, recovery and energy issues Utilization of side-streams from pulping processes Novel fibre-based, sustainable and smart materials. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes. Topics Cutting-edge topics such as, but not limited to, the following: Biorefining, energy issues Wood fibre characterization and nanotechnology Side-streams and new products from wood pulping processes Mechanical pulping Chemical pulping, recovery and bleaching Paper technology Paper chemistry and physics Coating Paper-ink-interactions Recycling Environmental issues.