Life Cycle Assessment of Silicate Cementitious Material Production Using Calcium Carbide Sludge

2014 ◽  
Vol 599 ◽  
pp. 324-327 ◽  
Author(s):  
Jia Ping Cui ◽  
Yu Liu ◽  
Zhi Hong Wang ◽  
Li Li Zhao ◽  
Fei Fei Shi ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Consumption ◽  
Environmental Impacts ◽  
Waste Heat ◽  
Calcium Carbide ◽  
Cementitious Material ◽  
Environmental Benefits ◽  
Drying Process ◽  
Cement Production

The environmental impacts of cement production using two pre-drying processes, i.e., coal-fired pre-drying process and pre-drying process by waste heat from kiln tail process were analyzed and compared through life cycle assessment (LCA). The results show that the energy consumption, GWP, AP, POCP, HT and EP of pre-drying process by waste heat from kiln tail are about 1%, 2%, 5.2%, 5% ,3.5% and 3.8% lower than coal-fired process; therefore the application of pre-drying process by waste heat from kiln tail has obvious environmental benefits.

Comparative Analysis of Environmental Impacts between Dregs Disposal and Conventional Cement Production by Life Cycle Assessment (LCA)

2013 ◽  
Vol 777 ◽  
pp. 461-466 ◽  
Author(s):  
Kan Fu ◽  
Xiao Yu Ren ◽  
Jin Quan Lin ◽  
Ping Yue
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Load Ratio ◽  
Environmental Benefits ◽  
Cement Kiln ◽  
Environmental Load ◽  
Human Toxicity ◽  
Cement Production ◽  
Depletion Potential

The environmental impacts of the dregs disposal in cement kiln and conventional production were contrastively evaluated by life cycle assessment (LCA) in this study. The results showed that the environmental load ratio of both cement productions followed the order of energy depletion potential (EDP) > depletion potential (ADP) > global warming potential (GWP) > acidification potential (AP) > human toxicity (HT) > photochemical ozone creation potential (POCP). The comprehensive environmental load of disposal dregs was 14.465×10-12/a, which was 3.98% lower than that of the conventional cement production. Moreover, the reduced percentage of the environmental load followed the order of HT> AP> POCP> EDP> ADP> GWP, which indicated that the reduced percentage of human toxicity and acidification reached 10.62% and 10.06% respectively. Thus, considering the environmental benefits, it would be a better method to dispose dregs instead of limestone in cement kiln.

Comparative Life Cycle Assessment of Autoclaved Concrete Blocks and Fired Blocks in China

2018 ◽  
Vol 913 ◽  
pp. 1018-1026
Author(s):  
Yan Qiong Sun ◽  
Yu Liu ◽  
Su Ping Cui
Keyword(s):  
Sensitivity Analysis ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Consumption ◽  
Data Quality ◽  
Human Health ◽  
Functional Unit ◽  
Cement Production ◽  
Terrestrial Ecotoxicity ◽  
Concrete Blocks

In this paper, a variety of blocks were grouped into the autoclaved blocks and fired blocks as far as the productive technology is concerned. In order to compare the life cycle impacts of the two kinds of the blocks, a life cycle assessment of two products on the functional unit 1m3 was carried out through the exploitation of mineral stage, transportation stage and the production of the blocks stage on the considering of the resource and energy consumption and the pollutant discharges. The results demonstrated that the fired blocks appeared to have less impact than autoclaved concrete blocks on human health, marine ecotoxicity toxicity and terrestrial ecotoxicity toxicity nearly 30%. The raw coal led to the serious impacts on the fossil depletion through the cement production stage of the autoclaved concrete blocks accounting for 45.86% and the gangue exploitation stage of the fired blocks accounting for 42.5%. Assessment of the data quality that the data was of pretty high or within the permission. The sensitivity analysis and contribution analysis assessment showed that the conclusion were robust.

scholarly journals Life Cycle Assessment of Maize-Germ Oil Production and The Use of Bioenergy to Mitigate Environmental Impacts: A Gate-To-Gate Case Study

Resources ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 60 ◽  
Author(s):  
Mattias Gaglio ◽  
Elena Tamburini ◽  
Francesco Lucchesi ◽  
Vassilis Aschonitis ◽  
Anna Atti ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Demand ◽  
Food Industry ◽  
Renewable Energy Sources ◽  
Environmental Benefits ◽  
Impact Categories ◽  
Industrial Processing ◽  
The Impact

The need to reduce the environmental impacts of the food industry is increasing together with the dramatic increment of global food demand. Circulation strategies such as the exploitation of self-produced renewable energy sources can improve ecological performances of industrial processes. However, evidence is needed to demonstrate and characterize such environmental benefits. This study assessed the environmental performances of industrial processing of maize edible oil, whose energy provision is guaranteed by residues biomasses. A gate-to-gate Life Cycle Assessment (LCA) approach was applied for a large-size factory of Northern Italy to describe: (i) the environmental impacts related to industrial processing and (ii) the contribution of residue-based bioenergy to their mitigation, through the comparison with a reference system based on conventional energy. The results showed that oil refinement is the most impacting phase for almost all the considered impact categories. The use of residue-based bioenergy was found to drastically reduce the emissions for all the impact categories. Moreover, Cumulative Energy Demand analysis revealed that the use of biomass residues increased energy efficiency through a reduction of the total energy demand of the industrial process. The study demonstrates that the exploitation of residue-based bioenergy can be a sustainable solution to improve environmental performances of the food industry, while supporting circular economy.

Comprehensive analysis of environmental impacts and energy consumption of biomass-to-methanol and coal-to-methanol via life cycle assessment

Energy ◽  
2020 ◽  
Vol 204 ◽  
pp. 117961 ◽  
Author(s):  
Yigang Liu ◽  
Guoxuan Li ◽  
Zhengrun Chen ◽  
Yuanyuan Shen ◽  
Hongru Zhang ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Consumption ◽  
Environmental Impacts ◽  
Comprehensive Analysis

scholarly journals Life Cycle Assessment and Environmental Valuation of Biochar Production: Two Case Studies in Belgium

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2166 ◽  
Author(s):  
Sara Rajabi Hamedani ◽  
Tom Kuppens ◽  
Robert Malina ◽  
Enrico Bocci ◽  
Andrea Colantoni ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Production Systems ◽  
Point Of View ◽  
Environmental Benefits ◽  
Pig Manure ◽  
Future Research ◽  
Life Cycle Perspective ◽  
The Impact

It is unclear whether the production of biochar is economically feasible. As a consequence, firms do not often invest in biochar production plants. However, biochar production and application might be desirable from a societal perspective as it might entail net environmental benefits. Hence, the aim of this work has been to assess and monetize the environmental impacts of biochar production systems so that the environmental aspects can be integrated with the economic and social ones later on to quantify the total return for society. Therefore, a life cycle analysis (LCA) has been performed for two potential biochar production systems in Belgium based on two different feedstocks: (i) willow and (ii) pig manure. First, the environmental impacts of the two biochar production systems are assessed from a life cycle perspective, assuming one ton of biochar as the functional unit. Therefore, LCA using SimaPro software has been performed both on the midpoint and endpoint level. Biochar production from willow achieves better results compared to biochar from pig manure for all environmental impact categories considered. In a second step, monetary valuation has been applied to the LCA results in order to weigh environmental benefits against environmental costs using the Ecotax, Ecovalue, and Stepwise approach. Consequently, sensitivity analysis investigates the impact of variation in NPK savings and byproducts of the biochar production process on monetized life cycle assessment results. As a result, it is suggested that biochar production from willow is preferred to biochar production from pig manure from an environmental point of view. In future research, those monetized environmental impacts will be integrated within existing techno-economic models that calculate the financial viability from an investor’s point of view, so that the total return for society can be quantified and the preferred biochar production system from a societal point of view can be identified.

Environmental Benefits of Cold-in-Place Recycling

2018 ◽  
Vol 2672 (24) ◽  
pp. 11-19 ◽  
Author(s):  
Angela Pakes ◽  
Tuncer Edil ◽  
Morgan Sanger ◽  
Renee Olley ◽  
Tyler Klink
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle ◽  
Energy Consumption ◽  
Environmental Impacts ◽  
Carbon Dioxide Emissions ◽  
Environmental Benefits ◽  
Water Usage ◽  
Aggregate Consumption ◽  
Environmental Savings ◽  
Lca Results

The conventional highway resurfacing technique of mill and overlay (M&O) partially removes the existing pavement and replaces it with asphalt derived from some recycled but mostly virgin materials. Cold-in-place recycling (CIR) is an alternative highway resurfacing method that partially mills the existing pavement and uses it beneath a thinner layer of new asphalt. CIR has become widely used for convenience and cost benefits, but the environmental impacts are poorly quantified. The objective of this study was to quantify the environmental life cycle benefits of using CIR for highway resurfacing instead of M&O. Material quantities and equipment used for CIR and what would have been used in M&O for the same project were provided by contractors for nine highway resurfacing projects in Wisconsin. With this information, a life cycle assessment (LCA) tool was used to determine the relative environmental impacts of the two methods, with energy consumption, water usage, and carbon dioxide emissions chosen as the metrics of the LCA. Results show average environmental savings of 23% in energy consumption and carbon dioxide emissions and 20% in water consumption when using CIR instead of M&O for highway resurfacing. Additionally, CIR reduced virgin aggregate consumption by 37%. Environmental savings achieved by using CIR were found to be directly related to the reduction in volume of new hot mix asphalt (HMA) used, and to the reduction in transportation of materials to and from the site. Linear correlations that can be used to estimate savings of future CIR projects were projected.

scholarly journals End-of-Life Recycling Options of (Nano)Enhanced CFRP Composite Prototypes Waste—A Life Cycle Perspective

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2129
Author(s):  
Fotini Petrakli ◽  
Anastasia Gkika ◽  
Alexandra Bonou ◽  
Panagiotis Karayannis ◽  
Elias P. Koumoulos ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Carbon Fibre ◽  
End Of Life ◽  
Environmental Impacts ◽  
New Product Development ◽  
Environmental Benefits ◽  
Product Development Process ◽  
Impact Indicator ◽  
Cfrp Composite

Life cycle assessment is a methodology to assess environmental impacts associated with a product or system/process by accounting resource requirements and emissions over its life cycle. The life cycle consists of four stages: material production, manufacturing, use, and end-of-life. This study highlights the need to conduct life cycle assessment (LCA) early in the new product development process, as a means to assess and evaluate the environmental impacts of (nano)enhanced carbon fibre-reinforced polymer (CFRP) prototypes over their entire life cycle. These prototypes, namely SleekFast sailing boat and handbrake lever, were manufactured by functionalized carbon fibre fabric and modified epoxy resin with multi-walled carbon nanotubes (MWCNTs). The environmental impacts of both have been assessed via LCA with a functional unit of ‘1 product piece’. Climate change has been selected as the key impact indicator for hotspot identification (kg CO2 eq). Significant focus has been given to the end-of-life phase by assessing different recycling scenarios. In addition, the respective life cycle inventories (LCIs) are provided, enabling the identification of resource hot spots and quantifying the environmental benefits of end-of-life options.

scholarly journals Evaluation of Environmental Impact of Cement Production in Algeria Using Life Cycle Assessment

2015 ◽  
Vol 45 ◽  
pp. 79-84
Author(s):  
S. Boughrara ◽  
M. Chedri ◽  
K. Louhab
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Environmental Impacts ◽  
Raw Material ◽  
Cement Production ◽  
Dry Process ◽  
The Impact ◽  
Inputs And Outputs

The aim of this study is the use of Life Cycle Assessment, to evaluate the impact generated by cement manufactory situated in Sour EL Ghozlane town in Algeria country, which use the dry process to produce cement Portland. The LCA method is used for compiling and examining the inputs and outputs of energy, raw material and environmental impacts directly attributable to the manufacture and functioning of a product throughout its life. It is also used to determine element and energy contributing to each impact evaluated. Potentials impacts are evaluated using the SimaProV.7.1 software and IMPACT2000+ method in this study.

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