Life-cycle assessment of carbon dioxide emissions of asphalt pavements in China

2020 ◽  
Vol 173 (5) ◽  
pp. 228-240
Author(s):  
Yingli Huang ◽  
Zhenhua Qiao ◽  
Ying Zhang ◽  
Haitao Zhang
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Carbon Dioxide Emissions ◽  
Asphalt Pavements

scholarly journals Estimation of Carbon Dioxide Emissions from a Traditional Nutrient-Rich Cambodian Diet Food Production System Using Life Cycle Assessment

2021 ◽  
Vol 13 (7) ◽  
pp. 3660
Author(s):  
Rathna Hor ◽  
Phanna Ly ◽  
Agusta Samodra Putra ◽  
Riaru Ishizaki ◽  
Tofael Ahamed ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Co2 Emissions ◽  
Production System ◽  
Agricultural Production ◽  
Carbon Dioxide Emissions ◽  
Food Production ◽  
Carbon Dioxide Co2 ◽  
Food Production System

Traditional Cambodian food has higher nutrient balances and is environmentally sustainable compared to conventional diets. However, there is a lack of knowledge and evidence on nutrient intake and the environmental greenness of traditional food at different age distributions. The relationship between nutritional intake and environmental impact can be evaluated using carbon dioxide (CO2) emissions from agricultural production based on life cycle assessment (LCA). The objective of this study was to estimate the CO2 equivalent (eq) emissions from the traditional Cambodian diet using LCA, starting at each agricultural production phase. A one-year food consumption scenario with the traditional diet was established. Five breakfast (BF1–5) and seven lunch and dinner (LD1–7) food sets were consumed at the same rate and compared using LCA. The results showed that BF1 and LD2 had the lowest and highest emissions (0.3 Mt CO2 eq/yr and 1.2 Mt CO2 eq/yr, respectively). The food calories, minerals, and vitamins met the recommended dietary allowance. The country’s existing food production system generates CO2 emissions of 9.7 Mt CO2 eq/yr, with the proposed system reducing these by 28.9% to 6.9 Mt CO2 eq/yr. The change in each food item could decrease emissions depending on the type and quantity of the food set, especially meat and milk consumption.

scholarly journals Life cycle assessment of the environmental impacts of transport infrastructure and individual modes of transport

2021 ◽  
Author(s):  
Kristína Kováčiková ◽  
◽  
Antonín Kazda
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impacts ◽  
Carbon Dioxide Emissions ◽  
Assessment Method ◽  
Global Perspective ◽  
Transport Infrastructure

The paper is focused on the assessment of the environmental impacts of transport infrastructure and individual types of transport using the life cycle assessment method. The paper contains a description of the basic terminology of the problem related to transport, the environment and methods of environmental impact assessment. The paper contains analysis on monitoring carbon dioxide emissions from a global perspective as well as from a regional perspective focused on Slovakia. The aim of the paper is to create a proposal for the assessment of environmental impacts of transport infrastructure, in the form of specification of areas of assessment for selected types of transport with a focus on carbon dioxide emissions. Using the knowledge and principles of the life cycle method, a proposal for relevant indicators and a proposal for a comprehensive assessment of the impacts of selected types of transport, focused on carbon dioxide emissions, is created in the paper

scholarly journals Carbon Emissions of China’s Cement Packaging: Life Cycle Assessment

2019 ◽  
Vol 11 (20) ◽  
pp. 5554
Author(s):  
Xiaowei Ma ◽  
Chuandong Li ◽  
Bin Li
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Carbon Dioxide Emissions ◽  
Total Carbon ◽  
New Materials ◽  
Life Cycle Assessment Methodology ◽  
Production Phase ◽  
Plastic Composite ◽  
The Government

China is the largest producer of cement in the world. With this tremendous production of cement, the extensively used cement packaging embodies significant carbon dioxide emissions. However, this has scarcely been investigated. This paper presents the first investigation into three types of cement packaging in China using the life cycle assessment methodology. The carbon dioxide emissions in each production phase of cement packaging were calculated and compared to the emissions in the western, middle, and eastern regions in China. The results show that in the production phase, the consumption of electricity accounted for the highest proportion of total carbon dioxide emissions (23.39–35.14%), followed by the consumption of polypropylene-based material (23.39%). From a packaging perspective, laminated plastic woven bags emitted the most carbon dioxide (0.637 kg/bag), followed by paper–plastic composite bags (0.536 kg/bag) and paper bags (0.022 kg/bag). In regional terms, the western region emitted the most carbon dioxide (3.06 million tons) compared with the eastern (2.01 million tons) and middle (1.81 million tons) regions due to the low bulk rate. Our findings indicate that using paper–plastic composite bags instead of laminated plastic woven bags and using recycled materials instead of new materials in certain production phases can considerably reduce the environmental impacts of cement packaging. The government should encourage the use of non-coal energy power generation for the production phase. Further improvements could focus on the use of bulk cement instead of packaged cement.

scholarly journals Life Cycle Energy Consumption and Carbon Dioxide Emissions of Agricultural Residue Feedstock for Bioenergy

2021 ◽  
Vol 11 (5) ◽  
pp. 2009
Author(s):  
Valerii Havrysh ◽  
Antonina Kalinichenko ◽  
Anna Brzozowska ◽  
Jan Stebila
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Life Cycle ◽  
Carbon Dioxide Emissions ◽  
Crop Production ◽  
Agricultural Residues ◽  
Environmental Indicators ◽  
Low Carbon ◽  
Low Carbon Economy ◽  
Energy Inputs

The depletion of fossil fuels and climate change concerns are drivers for the development and expansion of bioenergy. Promoting biomass is vital to move civilization toward a low-carbon economy. To meet European Union targets, it is required to increase the use of agricultural residues (including straw) for power generation. Using agricultural residues without accounting for their energy consumed and carbon dioxide emissions distorts the energy and environmental balance, and their analysis is the purpose of this study. In this paper, a life cycle analysis method is applied. The allocation of carbon dioxide emissions and energy inputs in the crop production by allocating between a product (grain) and a byproduct (straw) is modeled. Selected crop yield and the residue-to-crop ratio impact on the above indicators are investigated. We reveal that straw formation can consume between 30% and 70% of the total energy inputs and, therefore, emits relative carbon dioxide emissions. For cereal crops, this energy can be up to 40% of the lower heating value of straw. Energy and environmental indicators of a straw return-to-field technology and straw power generation systems are examined.

scholarly journals Greenhouse Gas Emission of Broiler Chicken Production in Malaysia using Life Cycle Assessment Guidelines: A Case Study

2018 ◽  
Vol 3 (2) ◽  
pp. 87-97
Author(s):  
Syakira Afiqah Suffian ◽  
Atiah Abdullah Sidek ◽  
Toshihiko Matsuto ◽  
Muataz Hazza Al Hazza ◽  
Hazlina Md Yusof ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Greenhouse Gas ◽  
Broiler Chicken ◽  
Greenhouse Gas Emission ◽  
Gas Emission ◽  
Chicken Farm

The aim of this research was to evaluate the level of greenhouse gas emission from broiler chicken farming industry in Malaysia. In order to achieve that, Life Cycle Assessment method was chosen as a framework to complete the task. A case study was conducted at a broiler chicken farm to gather the data and information related to the broiler chicken production. Cradle-to-gate assessment including distribution stage was conducted based on the ISO14040/1044 guidelines. Inventory data for this case study was gathered in collaboration with one of the selected case study broiler chicken farm company. Greenhouse gas emission that consists of several most affected gases such as carbon dioxide, methane and nitrous oxide was studied. Result shows that the highest carbon dioxide emission came from manure, which accounted for 1,665,342 kg CO2 equivalent per total broilers while the highest methane emission came from feed, which accounted for 126,207.84 g CH4 equivalent per total broilers. For nitrous oxide emission, the highest values came from bedding which accounted for 20,316.87 g N2O equivalent per total broilers in the commercial modern broiler chicken farm. In this case study, it can be concluded that manure gives the most prominent effect to the greenhouse gas emission followed by feed and bedding materials. 

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