Life-Cycle Assessment of Municipal Solid Waste Incineration Fly Ash Recycling as a Feedstock for Brick Manufacturing

被引:4
|
作者
Lin, Tseng-Hsian [1 ]
Siao, Hung-Jung [1 ]
Gau, Sue-Huai [1 ]
Kuo, Jen-Hwa [2 ,4 ]
Li, Ming-Guo [1 ]
Sun, Chang-Jung [3 ]
机构
[1] Tamkang Univ, Dept Water Resources & Environm Engn, Yingzhuan Rd, New Taipei City 251301, Taiwan
[2] Natl Taipei Univ Technol, Dept Ind Engn & Management, 1,Sect 3, Zhongxiao Eest Rd, Taipei City 106344, Taiwan
[3] Dongguan City Univ, Sch Urban Construction & Environm, 1 Wenchang Rd, Dongguan 523419, Peoples R China
[4] Natl Yang Ming Chiao Tung Univ, Inst Brain Sci, 155,Sect 2,Linong St, Taipei City 112304, Taiwan
关键词
municipal solid waste incineration fly ash; life-cycle assessment; green bricks; recycling; mechanical-chemical stabilization; IMPACT;
D O I
10.3390/su151310284
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The recovery of municipal solid waste incineration (MSWI) fly ash is currently considered to be the most viable solution for its management. However, in developing resource recovery technologies, it is crucial to consider the overall environmental impact. This study employed a life-cycle assessment (LCA) to compare environmentally friendly red bricks partially utilizing MSWI fly ash as a raw material with conventional red bricks. The results demonstrate that the use of phosphoric acid during the resource recovery process imposes the most significant environmental burden, followed by electricity consumption. To address this issue, in this study, we simulated the replacement of phosphoric acid with phosphoric acid monohydrate recovered from discarded fire extinguishers, resulting in the production of second-generation environmentally friendly red bricks. The analysis revealed that the environmentally friendly red bricks exhibited a mere 5.52% increase in total environmental impact compared with traditional red bricks. Moreover, by stabilizing heavy metals using recovered phosphoric acid monohydrate, the second-generation environmentally friendly red bricks achieved an 8.75% reduction in total environmental impact relative to traditional red bricks. These findings highlight the environmental benefits of fly ash reuse in red brick production, and the incorporation of other industrial waste or byproducts could further enhance its efficacy. The application of the LCA facilitated the identification of key areas for improvement and enabled precise evaluation of the environmental benefits associated with waste reuse.
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页数:20
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