处理造纸厂污泥废物的挑战与机遇

Kirthika S.K. , Gaurav Goel , Jo Scott , Saurav Goel
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引用次数: 0

摘要

包括化工、造纸、金属、陶瓷、玻璃和水泥在内的基础工业是全球排放和废物产生的最大贡献者之一。其中,造纸生产产生一种称为造纸厂污泥(PMS)的副产品,预计到2050年每年将产生2750万吨。这篇综述批判性地评估了目前的PMS管理实践,并探索了其增值的新机会。根据对超过275篇研究文章的系统分析,该研究确定了关键的价值途径,包括能量回收(例如,厌氧消化产生高达3 PJ/年),材料再利用(例如,10-20 % PMS含量的砖显示30 MPa抗压强度)和生物燃料生产(例如,生物乙醇产量为0.25-0.35 g/g干PMS)。该评论还强调了这些方法的环境效益,例如,当PMS用于水泥生产时,全球变暖潜势降低了50% %以上。这篇论文提倡一种生物炼制模式,在这种模式下,造纸厂与生物质、生物燃料和沼气共同生产纸张,从而提高可持续性并支持循环经济原则。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Challenges and opportunities in tackling paper mill sludge waste
The foundation industries including chemicals, paper, metals, ceramics, glass, and cement are among the largest contributors to global emissions and waste generation. Among these, paper production generates a by-product known as paper mill sludge (PMS), with an estimated 27.5 million tonnes expected annually by 2050. This review critically evaluates current PMS management practices and explores emerging opportunities for its valorisation. Drawing on a systematic analysis of over 275 research articles, the study identifies key valorisation pathways, including energy recovery (e.g., anaerobic digestion yielding up to up to 3 PJ/year), material reuse (e.g., bricks with 10–20 % PMS content showing 30 MPa compressive strength), and biofuel production (e.g., bioethanol yields of 0.25–0.35 g/g dry PMS). The review also highlights the environmental benefits of these approaches, such as a over 50 % reduction in global warming potential when PMS is used in cement production. The paper advocates for a biorefinery model in which paper mills co-produce paper alongside biomass, biofuels, and biogas, thereby enhancing sustainability and supporting circular economy principles.
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