Carbon footprints of incineration, pyrolysis, and gasification for sewage sludge treatment

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2024-10-02 DOI:10.1016/j.resconrec.2024.107939

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Abstract

Thermal technologies have gained increasing attention in sludge management. This study applied life cycle assessment to assess the impacts to climate change of ten technological configurations (TCs) treating sludge with incineration, gasification, and pyrolysis. We used distributions of process parameters for quantifying the associated uncertainties and considered different energy exchanges. In a 55 %-fossil energy system, the TCs with various thermal processes showed impacts to climate change in a wide range of −2000 to 2000 kg CO₂ eq/t total solid. A probabilistic comparison indicated that with a 10 %-fossil energy system, TCs with gasification and pyrolysis showed a > 95 % probability of performing better than TCs with incineration. Energy consumption and dewatering parameters contributed significantly to the uncertainty due to their large variation and sensitivity. This study emphasized the potential of optimizing key parameters and provided evidence from a climate change perspective for better technological selection and development in sludge management.

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焚化、热解和气化处理污水污泥的碳足迹

热技术在污泥管理中越来越受到关注。本研究采用生命周期评估方法，评估了用焚烧、气化和热解处理污泥的十种技术配置（TC）对气候变化的影响。我们利用工艺参数的分布来量化相关的不确定性，并考虑了不同的能量交换。在化石能源占 55% 的系统中，采用不同热处理工艺的技术方案对气候变化的影响范围为-2000 至 2000 千克二氧化碳当量/吨总固体。概率比较表明，在 10% 的化石能源系统中，采用气化和热解工艺的 TCs 比采用焚烧工艺的 TCs 有 95% 的概率表现更好。由于能耗和脱水参数变化大、敏感性高，因此在很大程度上造成了不确定性。这项研究强调了优化关键参数的潜力，并从气候变化的角度为更好地选择和开发污泥管理技术提供了证据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.