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Article
Chemistry, Multidisciplinary
Fan Lu et al.
Summary: The climate change impacts of six valorization scenarios for food waste were evaluated and compared with incineration and anaerobic digestion through a life cycle assessment. All six scenarios showed better climate change benefits than incineration, with the hydrolysis for the carbon source alternatives production coupled with thermal drying-RDF scenario and thermal drying-RDF scenario achieving the best and second-best climate change benefits. Sensitivity analysis revealed key parameters affecting the global warming potential results. This study provides valuable data and insights for decision-making regarding the utilization of food waste.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Marvin Bachmann et al.
Summary: The rapid growth of plastics production worsens the triple crisis of habitat loss, plastic pollution, and greenhouse gas emissions. Circular strategies to achieve net-zero GHG emissions have been proposed, but their implications for overall sustainability have not been studied on a global scale. This study links a comprehensive model of plastic production and end-of-life treatment to the planetary boundaries framework and finds that even a circular, climate-optimized plastics industry exceeds sustainability thresholds by up to four times. However, improving recycling technologies and rates, combined with biomass and CO2 utilization, can bring plastics into their safe operating space by 2030. Still, achieving absolute sustainability for plastics requires fundamental changes in production and use methods.
NATURE SUSTAINABILITY
(2023)
Article
Engineering, Environmental
Yi Liu et al.
Summary: This study estimates the carbon emissions from municipal solid waste treatment across 30 Chinese provinces from 2011 to 2020. The results show that technological advances in waste treatment are the main driver of national carbon emissions reduction. Additionally, the impact of policies on carbon emissions changes is further analyzed using the LMDI-PDA model, considering socio-economic factors. The methods and results of this study can provide better decision-making support for national and provincial carbon emissions control policies targeting MSW treatment.
Article
Engineering, Environmental
Yue Qin et al.
Summary: This study analyzed the impacts of planning strategies to prepare for potentially fully disrupted natural gas imports in China, finding that compensating for gas import disruptions with domestic fossil fuels could lead to excess premature deaths, increased carbon emissions, and aggravated water stress. Improving energy efficiency, electrification, cleaner combustion, and expanding gas storage capacity can significantly reduce premature deaths and negative carbon and water impacts simultaneously.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Dan Wang et al.
Summary: The European Commission's directives have led to improvements in municipal solid waste management practices, with Nottingham transitioning from a simple landfill system to a multi-technology mode involving waste prevention, recycling, and energy recovery. This transition has resulted in reduced greenhouse gas emissions per unit waste treated, demonstrating the effectiveness of the EU directives in driving sustainable waste management practices.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Multidisciplinary Sciences
Adriana Gomez-Sanabria et al.
Summary: Based on the Shared Socioeconomic Pathways, a global systematic approach is developed to evaluate the potential reduction of greenhouse gas and air pollutant emissions through circular municipal waste management systems. The study contrasts two sets of global scenarios and finds that a sustainability-oriented mitigation strategy produces earlier and larger co-benefits compared to scenarios focused solely on technical solutions. The findings indicate that the sustainability-oriented scenario can eliminate ambient air pollution from open burning entirely before 2050, while still having 386 Tg CO2eq/yr of GHG (CH4 and CO2) to be released.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Yan Zhao et al.
Summary: The potential climate change impacts of Chinese household waste management development were assessed through a life cycle assessment. The study found that landfilling produces a high amount of CO2 emissions, while incineration shows some savings. The introduction of food waste source separation can further reduce climate change impacts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Kannan Govindan et al.
Summary: This study investigates the factors influencing residents' waste sorting behavior based on the theory of planned behavior (TPB). The research model was built and tested using a survey of 324 residents in Shanghai. The results show that attitude, subjective norms, and perceived behavioral control are positively related to residents' waste sorting intention, and sorting behavior is influenced by intention. Additionally, the study suggests that infrastructure, economic incentive, and assistance & supervision have a positive moderating effect on the relationship between intention and behavior. This research enhances our understanding of waste sorting behavior and contributes to the improvement of TPB. The findings from Shanghai provide valuable insights for promoting waste sorting among residents in other municipalities.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Engineering, Environmental
Elisabeth C. A. Van Roijen et al.
Summary: This review examines the life cycle assessments and biodegradation studies of common bioplastics. The excessive production and disposal of plastics, fueled by a growing single-use consumer base, have led to substantial environmental impacts. The study highlights the limited understanding of waste management practices for bioplastics and identifies research gaps and sources of uncertainty. The findings underscore the need for further research on the potential circularity of these bioplastics.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Environmental
Nanlin Liao et al.
Summary: Changes in MSW properties and parameters due to MSW source segregation and technological advancements in China have led to the need for new studies on GHG emissions of MSW treatment systems. This study analyzed GHG emissions in Shanghai before and after waste source segregation, showing a reduction in emissions after source segregation. Waste to energy incineration is not recommended, while anaerobic digestion has the potential for significant GHG emission reductions.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Environmental
Junnian Song et al.
Summary: This study constructs an integrated municipal solid waste management system focusing on reinforced waste recycling and energy recovery to achieve enhanced resource, energy, and environmental benefits(REEBs). Three scenarios with different waste collection and recycling levels are designed based on regional disparities. The results indicate that Guangdong, Jiangsu, Shandong, Zhejiang, and Sichuan have more advantages in terms of REEBs.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Environmental
Malak Anshassi et al.
Summary: Most LCA studies find MSWI to be preferred over landfilling from a GHG perspective due to high energy recovery offsets. However, there are cases where landfilling results in less GHG emissions. This study investigates the landfill gas collection efficiencies and waste composition that lead to such results, and explores the theoretical minimum lifetime gas collection efficiencies expected under US LFG regulations. The results show that only landfills with high LFG collection efficiencies and methane energy recovery can result in less GHG emissions compared to MSWI, and the required efficiency increases without LFG energy recovery. The study also models the expected theoretical lifetime LFG collection efficiencies and identifies the conditions under which a landfill can achieve such high efficiencies. The influence of factors such as oxidation rates, decay rates, electricity grids, and nonferrous metals recovery offsets on the collection efficiency range is explored, with electricity grids and nonferrous metals offsets having the greatest influence.
Article
Engineering, Environmental
Junxiao Wei et al.
Summary: China is the second-largest producer of municipal solid waste (MSW) in the world and incinerates the largest quantity of MSW. However, there is a lack of data on the latest dioxin emissions from MSW incineration (MSWI) in China. This study projected China's future MSW generation towards 2050 and discussed scenarios for reducing dioxin emissions through MSW diversion and air pollution control device (APCD) upgrades.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Yuxiao Zhou et al.
Summary: This study compared the environmental impacts, nutrient recovery, and economic benefits of two large-scale anaerobic digestion (AD) and in-vessel composting (IVC) plants. The results showed that AD had less impact on acidification and nutrient enrichment but had higher energy recovery, while IVC could recover more C, N, and P nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Chenyi Zhang et al.
Summary: This study predicts greenhouse gas emissions from municipal solid waste treatment in China and analyzes the potential for carbon neutrality. The results show that economic development is the main driver of emissions, and achieving carbon neutrality requires the implementation of appropriate policies and mitigation measures.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Green & Sustainable Science & Technology
Stijn van Ewijk et al.
Summary: Waste recycling is crucial in a circular economy, but the environmental benefits for certain materials remain uncertain. This study emphasizes the importance of reducing the carbon intensity of energy use for climate benefits, and highlights the need for careful consideration of energy implications in recycling efforts in the circular economy.
NATURE SUSTAINABILITY
(2021)
Article
Thermodynamics
Yongjun Yin et al.
Summary: The energy demands of a cassava starch plant were investigated and modeled, evaluating and comparing four combined heat and power systems using biogas. Results showed that the reciprocating internal-combustion engine and micro turbine CHP systems can meet all energy demands with the former being the most profitable and environmentally friendly. The best choice for the cassava starch plant would be the reciprocating internal-combustion engine CHP system.
Article
Engineering, Environmental
Yixuan Wang et al.
Summary: The study found that material production contributes 68-75% to toxicity impacts in the landfill while LFG emissions contribute 50-99% to global warming, ozone depletion, and smog impacts. The current non-methane organic compound regulatory threshold reduces methane emissions by <7% relative to the former threshold.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Natalia Vinitskaia et al.
Summary: This study provides the first life cycle assessment for the municipal solid waste management system in Moscow, one of the largest cities in Europe. The assessment reveals that the current system has high global warming potential and acidification potential. Planned changes by 2024 will reduce impacts in all categories, especially with the production of RDF and its substitution for coal in cement kilns.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Green & Sustainable Science & Technology
Behnam Dastjerdi et al.
Summary: The systematic review of scientific LCA studies on waste to energy technologies showed that different WtE technologies can have varying impacts on different environmental impact categories. For instance, anaerobic digestion was found to minimize environmental consequences in most aspects when dealing with organic wastes, except for ecotoxicity and human toxicity categories. Additionally, the preference of incineration over landfilling for municipal solid waste treatment was generally agreed upon in the results. Sensitivity analysis revealed that assumptions in substitution of WtE products are the primary source of uncertainty.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Engineering, Environmental
Malak Anshassi et al.
Summary: The focus of the study was to compare landfill and MSWI treatment, identifying key LCA assumptions that influenced the results. Landfill was found to be more favorable with high gas collection and gas-to-energy recovery efficiency, while MSWI was favored with energy recovery offsets. Tailoring an LCA analysis based on waste composition, gas management, and energy grid showed landfilling and MSWI treatment were influenced by these factors.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Multidisciplinary Sciences
Raoul Meys et al.
Summary: Achieving net-zero emission plastics can be done by combining biomass and CO2 utilization with increased recycling rates, which can save a significant amount of energy. To realize the potential cost savings, it is important to lower production costs, incentivize large-scale recycling, and reduce investment barriers for technologies using renewable carbon feedstock.
Review
Engineering, Environmental
George Bishop et al.
Summary: The shift from petrochemical to bio-based plastics is being accompanied by a need for comprehensive and appropriately designed Life Cycle Assessment (LCA) studies to provide clear evidence on the comparative sustainability of bioplastics. A review of 44 relevant studies published between 2011 and 2020 revealed common gaps and weaknesses in the current LCA studies applied to benchmark bioplastics against petrochemical plastics, highlighting the importance of more detailed and transparent reporting of LCI data, comprehensive impact assessment methodology, and consideration of multiple plastic use cycles and additives.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Review
Environmental Sciences
Junting Zhang et al.
Summary: This paper reviews recent LCA studies on municipal solid waste management systems, highlighting the potential environmental benefits of implementing an integrated solid waste management system compared to single treatment methods. Key issues identified include the importance of targeted management strategies for organic and recyclable waste, the increasing impact of waste collection and transportation, and the need for a multi-impact assessment for effective and affordable waste management. The study emphasizes the importance of understanding local limitations, environmental concerns, and comprehensive impacts in improving municipal solid waste management systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Environmental Sciences
Tahir Rasheed et al.
Summary: Global economic developments have led to an increased demand for energy, putting strain on energy supply chains and highlighting the need for safe, renewable, and sustainable energy sources. Waste to energy (WtE) is seen as a potential alternative energy source that is economically and environmentally sustainable, with municipal solid waste (MSW) playing a significant role in the development of renewable energy and sustainable environments. Developing countries are facing challenges with renewable energy scarcity and MSW disposal, prompting researchers to explore alternative WtE technologies to address socioeconomic and environmental issues.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
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Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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Engineering, Environmental
Jorge M. Torrente-Velasquez et al.
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Environmental Sciences
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ENVIRONMENTAL RESEARCH LETTERS
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Article
Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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Review
Engineering, Environmental
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RESOURCES CONSERVATION AND RECYCLING
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T. H. Christensen et al.
Review
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JOURNAL OF CLEANER PRODUCTION
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Multidisciplinary Sciences
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Engineering, Environmental
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
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Agricultural Engineering
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BIORESOURCE TECHNOLOGY
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Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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Environmental Sciences
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JOURNAL OF ENVIRONMENTAL SCIENCES
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Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
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