Gast Lukas, Cabrera Serrenho André, Allwood Julian M
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
Environ Sci Technol. 2022 Jul 19;56(14):10269-10278. doi: 10.1021/acs.est.2c01753. Epub 2022 Jun 30.
In industrial symbiosis, byproducts and wastes are used to substitute other process inputs, with the goal of reducing the environmental impact of production. Potentially, such symbiosis could reduce greenhouse gas emissions; although there exists literature exploring this at specific industrial sites, there has not yet been a quantitative global assessment of the potential toward climate mitigation by industrial symbiosis in bulk material production of steel, cement, paper, and aluminum. A model based on physical production recipes is developed to estimate global mass flows for production of these materials with increasing levels of symbiosis. The results suggest that even with major changes to byproduct utilization in cement production, the emission reduction potential is low (7% of the total bulk material system emissions) and will decline as coal-fired electricity generation and blast furnace steel production are phased out. Introducing new technologies for heat recovery allows a greater potential reduction in emissions (up to 18%), but the required infrastructure and technologies have not yet been deployed at scale. Therefore, further industrial symbiosis is unlikely to make a significant contribution to GHG emission mitigation in bulk material production.
在产业共生中，副产品和废弃物被用于替代其他工艺投入，目的是减少生产对环境的影响。从潜在意义上讲，这种共生关系可以减少温室气体排放；尽管有文献探讨了特定工业场所的这种情况，但尚未对钢铁、水泥、造纸和铝等大宗材料生产中的产业共生在减缓气候变化方面的潜力进行定量的全球评估。开发了一个基于物理生产配方的模型，以估算这些材料在共生水平不断提高情况下的全球生产质量流。结果表明，即使水泥生产中的副产品利用发生重大变化，减排潜力也很低（占大宗材料系统总排放量的7%），并且随着燃煤发电和高炉炼钢的逐步淘汰，减排潜力还会下降。引入热回收新技术可实现更大的减排潜力（高达18%），但所需的基础设施和技术尚未大规模部署。因此，进一步的产业共生不太可能对大宗材料生产中的温室气体减排做出重大贡献。
