CARBON EMISSION ANALYSIS OF WASTE BIODEGRADABLE PLASTICS BY DIFFERENT DISPOSAL TECHNOLOGIES

LI Jianyuan; SUN Yunan; HUANG Jiale; CHEN Qijing; JIA Yue; GAO Yule; CHENG Zhanjun; YAN Beibei; CHEN Guanyi

doi:10.13205/j.hjgc.202309015

Volume 41 Issue 9

Sep. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(9): 124-132

LI Jianyuan, SUN Yunan, HUANG Jiale, CHEN Qijing, JIA Yue, GAO Yule, CHENG Zhanjun, YAN Beibei, CHEN Guanyi. CARBON EMISSION ANALYSIS OF WASTE BIODEGRADABLE PLASTICS BY DIFFERENT DISPOSAL TECHNOLOGIES[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 124-132. doi: 10.13205/j.hjgc.202309015

Citation:

LI Jianyuan, SUN Yunan, HUANG Jiale, CHEN Qijing, JIA Yue, GAO Yule, CHENG Zhanjun, YAN Beibei, CHEN Guanyi. CARBON EMISSION ANALYSIS OF WASTE BIODEGRADABLE PLASTICS BY DIFFERENT DISPOSAL TECHNOLOGIES[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 124-132. doi: 10.13205/j.hjgc.202309015

Citation:

LI Jianyuan, SUN Yunan, HUANG Jiale, CHEN Qijing, JIA Yue, GAO Yule, CHENG Zhanjun, YAN Beibei, CHEN Guanyi. CARBON EMISSION ANALYSIS OF WASTE BIODEGRADABLE PLASTICS BY DIFFERENT DISPOSAL TECHNOLOGIES[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(9): 124-132. doi: 10.13205/j.hjgc.202309015

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CARBON EMISSION ANALYSIS OF WASTE BIODEGRADABLE PLASTICS BY DIFFERENT DISPOSAL TECHNOLOGIES

doi: 10.13205/j.hjgc.202309015

1. Interdisciplinary Innovation Lab for Environment and Energy, School of Mechanical Engineering & School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China;
2. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
3. Tianjin Key Laboratory of Biomass Wastes Utilization, Tianjin Engineering Research Center of Bio Gas, Oil Technology, Tianjin Engineering Research Center for Organic Wastes Safe Disposal and Energy Utilization, Tianjin 300072, China

Received Date: 2023-05-11
Available Online: 2023-11-15

Abstract

Abstract

Biodegradable plastics have attracted wide attention because of their environmental friendliness, but the carbon emission in the waste disposal process is still unclear. With the development and application of disposal technologies, the differences in carbon emissions of these technologies are worth exploring. To reveal the carbon emissions of different disposal technologies for waste biodegradable plastics, this study compares the indirect carbon emissions from operation energy consumption, direct carbon emissions from plastic decomposition, and carbon offset from resource recovery, based on the emission factor and mass balance method. The results showed that the net carbon emissions per ton of waste biodegradable plastics were as follows:landfill > incineration > industrial composting > chemical recovery > anaerobic fermentation > mechanical recycling. Because of the resource recovery of plastic and biogas, mechanical recycling and anaerobic fermentation had a net carbon emission of -842.33 kg CO₂eq and -341.55 kg CO₂eq, respectively, showing their better potential for carbon reduction. Among them, the indirect carbon emission, direct carbon emission, and carbon offset of mechanical recycling were 0.62~22.96, 0.13~0.52, and 0.93~1.58 times of other disposal technologies, respectively. And those of anaerobic fermentation were 0.09~2.11, 0.26~1.93, and 0.59~0.85 times, respectively. This indicated that mechanical recycling has higher energy consumption and carbon offsetting effects than anaerobic fermentation. However, the low efficiency and poor performance of recycled products limits the development of mechanical recycling for waste biodegradable plastics. Anaerobic fermentation has more development prospects from the perspective of carbon reduction potential. In addition, reducing operation energy consumption, promoting resource recovery, and giving full play to carbon offset potential are the main measures to achieve carbon emission reduction in the disposal of waste biodegradable plastics. From the perspective of striving for Double Carbon Goal, this study provides a reference for the selection of waste biodegradable plastics disposal technology.
- carbon emission,
- biodegradable plastics,
- disposal technology,
- carbon offset,
- resource recovery

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References(61)

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