Environmental impacts of energy use in wheat tillage systems: A comparative life cycle assessment (LCA) study in Iran

Energy ◽  
2017 ◽  
Vol 122 ◽  
pp. 11-24 ◽  
Author(s):  
Ehsan Houshyar ◽  
Philipp Grundmann
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Use ◽  
Tillage Systems ◽  
Comparative Life Cycle Assessment

Comparison of Life Cycle Assessment of Two Toasters

2011 ◽  
Author(s):  
Raghunathan Srinivasan ◽  
Gaurav Ameta
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Use ◽  
Recovery Phase ◽  
Raw Material ◽  
Energy Impact ◽  
Household Products ◽  
Use Phase ◽  
One Year

The objective of this paper is to determine and compare the environmental impacts of two toasters: standard and eco-friendly. The most rapidly growing sector for the e-waste world comes from Electronic household products. More than 2 million tons of electronic products are disposed off as solid waste to landfills in the US alone. The demand for energy supplies has been rapidly increasing in the past decade. Strict legislative measures should be enforced to protect the environment by making industries collect back the manufactured products at the End-of-Life (EOL) from the users and recycle the products. If these necessary steps are not taken, then these e-wastes will impose serious threat to society and the environment. In order to re-design environmentally friendly products and facilitate sustainable take-back planning, current products need to be evaluated for their environmental impacts. One of the widely used methodologies to assess the environmental impacts of a product is called Life Cycle Assessment (LCA). LCA is a cradle to grave approach for assessing the environmental impacts of a product. The cradle to grave approach includes raw material phase, manufacturing and assembly phase, use phase, recovery phase and disposal phase. The system boundary for LCA presented in this paper includes material phase, manufacturing phase, use-phase and disposal phase. The functional unit for the LCA is entire life of the toaster which is one year based on manufacturer’s warranty which also includes the rate of usage. The environmental impacts from the two toasters as presented in this paper include eutrophication, acidification, energy-use and global warming. The use phase energy impact is experimentally determined.

scholarly journals Life Cycle Assessment on Different Synthetic Routes of ZIF-8 Nanomaterials

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4998
Author(s):  
Vasileios Ntouros ◽  
Ioannis Kousis ◽  
Dimitra Papadaki ◽  
Anna Laura Pisello ◽  
Margarita Niki Assimakopoulos
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Environmental Sustainability ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Research Activity ◽  
Synthetic Routes ◽  
The Impact

In the last twenty years, research activity around the environmental applications of metal–organic frameworks has bloomed due to their CO2 capture ability, tunable properties, porosity, and well-defined crystalline structure. Thus, hundreds of MOFs have been developed. However, the impact of their production on the environment has not been investigated as thoroughly as their potential applications. In this work, the environmental performance of various synthetic routes of MOF nanoparticles, in particular ZIF-8, is assessed through a life cycle assessment. For this purpose, five representative synthesis routes were considered, and synthesis data were obtained based on available literature. The synthesis included different solvents (de-ionized water, methanol, dimethylformamide) as well as different synthetic steps (i.e., hours of drying, stirring, precursor). The findings revealed that the main environmental weak points identified during production were: (a) the use of dimethylformamide (DMF) and methanol (MeOH) as substances impacting environmental sustainability, which accounted for more than 85% of the overall environmental impacts in those synthetic routes where they were utilized as solvents and as cleaning agents at the same time; (b) the electricity consumption, especially due to the Greek energy mix which is fossil-fuel dependent, and accounted for up to 13% of the overall environmental impacts in some synthetic routes. Nonetheless, for the optimization of the impacts provided by the energy use, suggestions are made based on the use of alternative, cleaner renewable energy sources, which (for the case of wind energy) will decrease the impacts by up to 2%.

scholarly journals Evaluation of Life-Cycle Assessment Analysis: Application to Restoration Projects and New Construction in Alpine Climate, Japan

2021 ◽  
Vol 13 (7) ◽  
pp. 3608
Author(s):  
Yohei Endo ◽  
Hideki Takamura
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Use ◽  
Heritage Buildings ◽  
Operational Energy ◽  
Protection Legislation ◽  
New Construction ◽  
Analysis Application ◽  
Materials Used

The present paper discusses the applications of life-cycle assessment (LCA) to construction works in Japan. LCA has been frequently used to assess the environmental impacts of new construction. Nonetheless, the applications of LCA to restoration have not been fully confirmed to date. It is said that historical buildings may contribute to sustainable development. Nonetheless, as for heritage buildings, since the protection of cultural value is usually prioritised, their environmental impacts may not be sufficiently explored. To this aim, this paper evaluated the environmental impacts of the restoration of heritage buildings. This paper consisted of two tasks. First, the restoration projects of heritage buildings in Japan were introduced. The restoration of two heritage houses was discussed, referring to heritage protection legislation in Japan. Second, LCA was performed on the restoration of heritage houses and the construction of contemporary houses. Environmental impacts were compared between the restoration and new construction with regard to greenhouse gas emissions and operational energy use. A focus was given to the amount of materials used. Restoration consumes a limited amount of materials compared to new construction, although the energy use of heritage buildings is considerable. The environmental impacts of restoration were quantified so that they were compared with those of new construction. The comparison indicated issues applying LCA to heritage buildings.

scholarly journals Holzprodukte in vergleichenden Ökobilanzen | Wood Products in Comparative Life Cycle Assessment Studies

1999 ◽  
Vol 150 (3) ◽  
pp. 96-104 ◽  
Author(s):  
Frank Werner ◽  
Tina Künniger ◽  
Klaus Richter
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Wood Products ◽  
Product System ◽  
Comparative Life Cycle Assessment

Life Cycle Assessment (LCA) quantifies the potential environmental impacts of a product system throughout its life cycle. LCA methods are discussed taking into account the exceptional position of forestry and wood products. The results of three studies are presented where wood products are being compared to alternative products.

scholarly journals Solid-State Fermentation (SSF) versus Submerged Fermentation (SmF) for the Recovery of Cellulases from Coffee Husks: A Life Cycle Assessment (LCA) Based Comparison

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2685 ◽  
Author(s):  
Eva Catalán ◽  
Antoni Sánchez
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Solid State ◽  
Environmental Impacts ◽  
Solid State Fermentation ◽  
Submerged Fermentation ◽  
Energy Use ◽  
Production Systems ◽  
Cellulase Production ◽  
Coffee Husk

This article studies the environmental impacts of cellulase production by using a comparative attributional life cycle assessment (LCA) of two different scenarios of production. The first one is the commonly used submerged fermentation (SmF) using a pure substrate (cellulose powder) and a specific microorganism (Trichoderma reesei). The second scenario considers a novel system to produce enzymes and simultaneously treat a waste using the solid-state fermentation (SSF) process of coffee husk (CH) used as substrate. Experimental data were used in this scenario. The complete production process was studied for these two technologies including the fermentation phase and the complete downstream of cellulase. Life cycle inventory (LCI) data were collected from the database EcoInvent v3 (SimaPro 8.5) modified by data from literature and pilot scale experiments. The environmental impacts of both production systems revealed that those of SmF were higher than those of SSF. A sensitivity analysis showed that the results are highly conditioned by the energy use in the form of electricity during lyophilization, which is needed in both technologies. The results point to a possible alternative to produce the cellulase enzyme while reducing environmental impacts.

scholarly journals ENERGY CONSUMPTION, ENVIRONMENTAL IMPACTS AND EFFECTIVE MEASURES OF GREEN OFFICE BUILDINGS: A LIFE CYCLE APPROACH

2015 ◽  
Vol 10 (4) ◽  
pp. 161-177 ◽  
Author(s):  
Guozhu Mao ◽  
Hao Chen ◽  
Huibin Du ◽  
Jian Zuo ◽  
Stephen Pullen ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Use ◽  
Rapid Development ◽  
Green Building ◽  
Resource Depletion ◽  
Life Cycle Stage ◽  
Life Cycle Approach ◽  
Electricity Conservation

The last few decades have witnessed a rapid development of green buildings in China especially the office sector. The life cycle assessment (LCA) approach has potential to weigh the benefits and costs associated with green building developments. Essentially, the LCA method evaluates the costs and benefits across a building's life cycle with a system approach. In this study, a green office building in Beijing, China, was analyzed by life cycle assessment to quantify its energy use and evaluate the environmental impacts in each life cycle stage. The environmental impacts can be reduced by 7.3%, 1.6% and 0.8% by using 30% gas-fired electricity generation, increasing the summer indoor temperature by 1°C, and switching off office equipment and lighting during lunchtime, respectively. Similarly, by reusing 80% of the selected materials when the building is finally demolished, the three major adverse environmental impacts on human health, ecosystem quality, and resource depletion can be reduced by 11.3% 12.7%, and 7.1% respectively. Sensitivity analysis shows that electricity conservation is more effective than materials efficiency in terms of a reduction in environmental impacts. These findings are useful to inform decision makers in different stages of the green building life cycle.

scholarly journals A scalable and spatiotemporally resolved agricultural life cycle assessment of California almonds

2021 ◽  
Author(s):  
Elias Marvinney ◽  
Alissa Kendall
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Water Supply ◽  
Energy Use ◽  
Energy Intensity ◽  
Central Valley ◽  
San Joaquin Valley ◽  
Impact Categories ◽  
Freshwater Use ◽  
California's Central Valley

Abstract Purpose California’s Central Valley produces more than 75% of global commercial almond supply, making the life cycle performance of almond production in California of global interest. This article describes the life cycle assessment of California almond production using a Scalable, Process-based, Agronomically Responsive Cropping System Life Cycle Assessment (SPARCS-LCA) model that includes crop responses to orchard management and modeling of California’s water supply and biomass energy infrastructure. Methods A spatially and temporally resolved LCA model was developed to reflect the regional climate, resource, and agronomic conditions across California’s Central Valley by hydrologic subregion (San Joaquin Valley, Sacramento Valley, and Tulare Lake regions). The model couples a LCA framework with region-specific data, including water supply infrastructure and economics, crop productivity response models, and dynamic co-product markets, to characterize the environmental performance of California almonds. Previous LCAs of California almond found that irrigation and management of co-products were most influential in determining life cycle CO2eq emissions and energy intensity of California almond production, and both have experienced extensive changes since previous studies due to drought and changing regulatory conditions, making them a focus of sensitivity and scenario analysis. Results and discussion Results using economic allocation show that 1 kg of hulled, brown-skin almond kernel at post-harvest facility gate causes 1.92 kg CO2eq (GWP100), 50.9 MJ energy use, and 4820 L freshwater use, with regional ranges of 2.0–2.69 kg CO2eq, 42.7–59.4 MJ, and 4540–5150 L, respectively. With a substitution approach for co-product allocation, 1 kg almond kernel results in 1.23 kg CO2eq, 18.05 MJ energy use, and 4804 L freshwater use, with regional ranges of 0.51–1.95 kg CO2eq, 3.68–36.5 MJ, and 4521–5140 L, respectively. Almond freshwater use is comparable with other nut crops in California and globally. Results showed significant variability across subregions. While the San Joaquin Valley performed best in most impact categories, the Tulare Lake region produced the lowest eutrophication impacts. Conclusion While CO2eq and energy intensity of almond production increased over previous estimates, so too did credits to the system for displacement of dairy feed. These changes result from a more comprehensive model scope and improved assumptions, as well as drought-related increases in groundwater depth and associated energy demand, and decreased utilization of biomass residues for energy recovery due to closure of bioenergy plants in California. The variation among different impact categories between subregions and over time highlight the need for spatially and temporally resolved agricultural LCA.

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