Developing product level indicators to advance the nitrogen circular economy
Developing product level indicators to advance the nitrogen circular economy
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DOI：
10.1016/j.resconrec.2023.107167
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发表时间：
2023-11
期刊：
影响因子：
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通讯作者：
Chayse Lavallais;J. Dunn
中科院分区：
文献类型：
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作者：
Chayse Lavallais;J. Dunn
材料、能源和水系统的循环指标越来越多地指导循环经济设计。虽然回收的碳基材料制成的产品的指标比较常见，但废氮衍生产品的同行指标有限。然而，重要的是要制定这些指标，以指导将废氮转化为产品的新兴技术。在这项研究中，我们总结了氮循环指标的文献，强调农业和废水部门。接下来，我们使用Ellen麦克阿瑟基金会开发的材料循环指标（MCI）来量化由猪粪中的废氮制成的产品的循环性。我们考虑了四个使用不同技术从粪便中回收氮的测试案例。我们的分析表明，似乎增加表面圆度的技术可能不会大幅增加MCI结果。最后，我们讨论了使用MCI进行产品级分析和进一步开发的优点和缺点。
Increasingly, circularity indicators for material, energy, and water systems guide circular economy design. While indicators for products made from recycled carbon-based materials are somewhat common, peer indicators for waste nitrogen-derived products are limited. It is important, however, to develop such indicators to guide emerging technologies that transform waste nitrogen into products. In this study, we summarize the nitrogen circularity indicator literature, emphasizing the agricultural and wastewater sectors. Next, we use the Material Circularity Indicator (MCI) developed by the Ellen MacArthur Foundation, to quantify the circularity of products made from waste nitrogen in swine manure. We considered four test cases using different technologies to recover nitrogen from the manure. Our analysis indicates that technologies that seem to increase circularity on the surface may not yield a substantial increase in MCI results. Finally, we discuss the strengths and weaknesses of using the MCI for product-level analysis and further developments.