scholarly journals Fluid-Dynamic Study of the Avilés Port. Remedial Measures on the Environmental Impact of the Exterior Storage of Powdery Products

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1463
Author(s):  
Manuel Armindo Guerrero ◽  
Rubén Cordero ◽  
Julio Jorge ◽  
Francisco J. Vigil
Keyword(s):  
Environmental Impact ◽  
Fluid Dynamic ◽  
Air Pollutant ◽  
Dynamic Study ◽  
Pollutant Emission ◽  
Northern Coast ◽  
North East ◽  
Ansys Cfx ◽  
Surrounding Areas ◽  
Zinc Concentrate

Ports are one of the most commonly used places to perform the exterior storage of powdery products and as a consequence their surrounding areas usually face important problems of pollution. The Avilés Port, located in Asturias at the centre of the northern coast of Spain, asked for a fluid-dynamic study of their docks under the hypothesis of maximum capacity of powdery products, considering different piles of carbon, clinker, zinc concentrate and phosphates, in order to analyse: (a) the environmental impact under the two predominant winds in the port, east and north-east at the maximum wind speed, (b) different options of wind fences (location, gap to the piles, height and porosity) as a remedial measure, (c) the environmental impact of placing the proper wind fences along all the docks. The analyses were carried out by means of numerical simulation using the software ANSYS-CFX® and according to EPA “AP-42. Compilation of Air Pollutant Emission Factors” showed a pollutant emission reduction of 50% using the final strategy of wind fences decided by the Avilés Port Authority.

Exergoenvironmental Evaluation for a Coal-Fired Power Plant of Near-Zero Air Pollutant Emission

2017 ◽  
Author(s):  
Xiliang Hong ◽  
Jianhong Chen ◽  
Deren Sheng ◽  
Wei Li
Keyword(s):  
Environmental Impact ◽  
Power Plants ◽  
Air Pollutant ◽  
Pollutant Emission ◽  
Component Level ◽  
Large Space ◽  
Construction Design ◽  
Manufacturing Optimization ◽  
Energy Conversion Systems ◽  
High Benefit

Owing to the growing environmental concerns, super-critical and ultra-supercritical coal-fired power plants dominate the electricity generation with the demand of near-zero air pollutant emission in China. Therefore, it is highly expected to assess the environmental impact and optimize the design at global and local levels. Exergoenvironmental analysis is a valid approach to investigate the formation of environmental impacts (EIs) associated with energy conversion systems at the component level. It generates information crucial for designing systems with a lower overall environmental impact, based on life cycle assessment (LCA) and exergy analysis. A 600 MW supercritical coal-fired system with and without dust, SO2 and NOx mitigation controls was analyzed. Heat transfer in the boiler, condenser (CND), low pressure cylinder (LP), air preheater (APH) show high potential to decrease the environmental impact due to high exergy destructions. The deaerator (DEA), induced draft fan (IDF), forced draft fan (FDF) should be focussed on construction design and manufacturing optimization. Purification units reveal high benefit for reducing EI produced by coal combustion, but there is a large space for the EI saving for it. The specific EI of electricity in China is much greater than European.

Spatially Resolved Emission Factors to Reduce Uncertainties in Air Pollutant Emission Estimates from the Residential Sector

2021 ◽  
Vol 55 (8) ◽  
pp. 4483-4493
Author(s):  
Xinlei Liu ◽  
Guofeng Shen ◽  
Laiguo Chen ◽  
Zhe Qian ◽  
Ningning Zhang ◽  
...  
Keyword(s):  
Emission Factors ◽  
Air Pollutant ◽  
Pollutant Emission ◽  
Residential Sector ◽  
Spatially Resolved

scholarly journals Thermo-Chemical Treatment for Carcass Disposal and the Application of Treated Carcass as Compost

2021 ◽  
Vol 11 (1) ◽  
pp. 431
Author(s):  
Jae-In Lee ◽  
Eun-Ji Cho ◽  
Fritz Ndumbe Lyonga ◽  
Chang-Hee Lee ◽  
Sue-Yun Hwang ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Dry Weight ◽  
Heavy Metal Concentration ◽  
Leaf Length ◽  
Air Pollutant ◽  
Germination Index ◽  
Pollutant Emission ◽  
Reinforced Plastic ◽  
Korean Ministry ◽  
Index Value

A mechanized thermo-chemical treatment system was developed to treat the undecomposed carcass and remediate livestock burial sites. Animal carcasses were thus processed via crushing, mixing, and treatment with quicklime treatment, heat treatment (200–500 °C), and mixing with sawdust. The machinery was applied to two sites where 16,000 chickens and 418 pigs had previously been buried in fiber-reinforced plastic storage bins. No dioxins were detected in the gas discharged during processing, and the concentration of total volatile organic compound, toluene, ethylbenzene, xylene, and styrene were 430.3, 139.0, 18.3, 21.4, and 10.4 μg/m3, respectively, which were below the air pollutant emission standards issued by the Korean Ministry of Environment. Korean standards stipulating the use of treated carcasses as compost (C, N, and P content, heavy metal concentration, Escherichia coli, and Salmonella) were met, but the germination index value was less than 70, not satisfying the criteria. Plant height, leaf length, leaf width, and dry weight of lettuce grown in soil amended with treated carcass product were significantly lower than those grown in low nutrient soil due to the poor germination index of the treated carcass. These results indicate that a composting process is required before the use of the treated carcass as a fertilizer. The addition of zeolite retarded the elution of ammonia from the carcasses and its efficiency was about 87.9%. It is expected that the mechanized thermo-chemical treatment process developed in this study could replace other technologies for the remediation of livestock burial sites.

scholarly journals Environmental Impact and External Costs Associated with Hub-and-Spoke Network in Air Transport

2021 ◽  
Vol 13 (2) ◽  
pp. 465
Author(s):  
Mengyuan Sun ◽  
Yong Tian ◽  
Yao Zhang ◽  
Muhammad Nadeem ◽  
Can Xu
Keyword(s):  
Environmental Impact ◽  
Living Environment ◽  
Strategic Decision ◽  
Air Transport ◽  
Pollutant Emissions ◽  
Pollutant Emission ◽  
Civil Aviation ◽  
External Costs ◽  
Hub And Spoke ◽  
City Network

Under the background of economic globalization, the air transport industry developed rapidly. It turns out that the city-to-city network has not been able to adapt well to the development of the society, and the hub-and-spoke network came into being. The hub-and-spoke network demonstrates the advantages of reducing the operating costs of airlines to keep a competitive advantage, and by maintaining the interests of airlines in the rapidly developing context. However, during the operation of aircrafts, they consume fuel and spew a great deal of harmful pollutants into the air, which has an adverse impact on the living environment. This paper explores the impact and external costs associated with hub-and-spoke network in air transport from an environmental perspective. With some mathematical models, we construct a hub-and-spoke network and take a quantitative study on the environmental impact of air transport. For calculating pollutant emissions, meteorological conditions were considered to revise the pollutant emission factors of the Engine Emissions Data Base (EEDB) published by International Civil Aviation Organization (ICAO). The environmental external costs measurement model is employed to calculate the externality of toxic gas and greenhouse gas (GHG). In order to make the study more convincing, two alternative networks are computed: hub-and-spoke network and city-to-city network. It is found that the hub-and-spoke network is associated with poorer environmental impact and environmental external costs because of the different network characteristics and the scale of the fleets. Therefore, under the general trend of green aviation, the environmental impact and environmental external costs associated with hub-and-spoke network in air transport provides a certain reference for airlines’ strategic decision-making.

Application of ARPS–CMAQ modeling system for urban air pollutant emission abatement

2013 ◽  
Vol 8 (4) ◽  
pp. 462-473
Author(s):  
X.Y. Zhao ◽  
S.Y. Cheng ◽  
J.B. Li ◽  
X.R. Guo ◽  
H.Y. Wang
Keyword(s):  
Air Pollutant ◽  
Pollutant Emission ◽  
Urban Air ◽  
Emission Abatement
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