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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Land of Mercury-Tinted Water: An Investigation of Methylmercury as an International Economic By-Product Pollutant and Local Cultural Detriment in the State of Minnesota

Krievans, Liga 01 January 2015 (has links)
This thesis covers how global mercury emissions are effecting the Great Lakes region, specifically focusing on Minnesota. Minnesota is sensitive to mercury due to its abundant waters and love of fishing. Establishing state regulation and diversifying the State's economy only addresses a small percentage of emitted mercury prominent in Minnesota. Therefore, Minnesota must look to and promote out of State regulation to significantly decrease mercury exposure.
12

Emissionen aus Haltungssystemen für Legehennen

Lippmann, Jens 15 October 2014 (has links) (PDF)
Im Zeitraum von 2010 bis 2012 wurden Fragestellungen zu Voliere-(VO) und Kleingruppenhaltungssystemen (KG) für Legehennen durch einen vom BMEL geförderten Forschungsverbund untersucht. Das LfULG untersuchte die Stallluft und Emissionen in jeweils zwei Ställen dieser Systeme. Dabei wurden Herdengrößen kleiner und größer 15.000 Hennen abgebildet. Neben Lufttemperatur und Luftfeuchte wurden luftgetragene Stallraumlasten (Gase, Stäube und mikrobielle Bestandteile) in der Stall- und Abluft untersucht und Ableitungen für die Emissionen erarbeitet sowie Managementempfehlungen abgeleitet. Im Ergebnis wurden für Ammoniak 23 bzw. 26 g (KG) und 71 bzw. 67 g (VO), für Gesamtstaub 35 bzw. 37 g (KG) und 246 bzw. 128 g (VO), für Bakterien 10 11 kbE (KG) und 10 12 kbE (VO) sowie für Endotoxine 10 8 EE (KG) und 10 9 EE (VO) als Emissionsfaktoren je Tierplatz im Jahr ermittelt.
13

Exploring stages/phases and gates as a project management approach for South African clean development mechanism projects

Lotz, Marco 17 October 2011 (has links)
Climate change is a global problem that is at least partially caused by human induced greenhouse gas emissions. Various initiatives were developed in the 1990’s to incentivise greenhouse gas emission reductions below legal limits. One of these systems is the Kyoto Protocol’s Clean Development Mechanism (CDM). In these incentive schemes parties can sell (the Seller) their greenhouse gas emission reductions to other parties (the Buyer) who need to offset their emissions. Emission reduction incentivised projects have technical aspects, financial aspects and regulatory requirements. The complexity of emission reduction schemes are further increased due to the levels of scrutiny and diverse sources of scrutiny that a project undergoes. As a developing country South Africa (SA) has a lot to gain by the successful implementation of CDM projects. Unfortunately very few successful CDM projects exist in South Africa. It was then the aim of this research to explore why there are so few projects and what are the current CDM project management approaches followed for CDM projects in SA? During the investigation aspects of the project management landscape of SA CDM projects were structured by means of a stage/phase and gate approach. This was done to aid in addressing the specific requirements of CDM projects and to combine this with the limited real world experience of successful CDM projects in SA. A stage/phase-gate model was developed because of the model’s ability to manage risk per stage/phase and overall risks, as well as the ability of these models to assist in portfolio management. Various research methods were used to develop the final proposed stage/phase and gate project management model (Model β). These methods included over and above literature reviews: <ul><li> Two rounds of questionnaires to develop the model; </li><li> Interviews with individual experts through identified cases to validate the first version of the model; and </li><li> Interaction with the South African Clean Development Industry Association to validate the second version of the model. </li></ul> Model β should not be seen as a stationary model. The model should rather be adapted by each emission reduction project developer to suit the developer’s company specific requirements. Furthermore the evolving regulatory environment of emission reduction systems will lead to the continued adapting and updating of Model β. The model could then be useful for: <ul><li> Project developers to plan and execute their projects; and </li><li> Buyers or Investors in projects as to quickly ascertain current project status and progression. </li></ul> It is envisaged that applying Model β, or a derivative, will: <ul><li> Manage risk due to increased project management through a stage/phase and gate approach; </li><li> Decrease project development time and ensure all required outputs are achieved quicker; and </li><li> Due to decreasing development time, costs could be managed better. </li></ul> / Thesis (PhD)--University of Pretoria, 2011. / Graduate School of Technology Management (GSTM) / unrestricted
14

A Holistic Framework for Evaluating Gigatonne Scale Geological CO2 Storage in the Alberta Oil Sands: Physics, Policy, and Economics / Carbon Capture and Storage in the Alberta Oil Sands

Zhao, Yu Hao January 2023 (has links)
An increasing number of countries worldwide have made commitments in recent years to reduce emissions with the goal of limiting global temperature increases to 1.5-2 °C. Carbon capture and storage (CCS) is capable of significantly reducing anthropogenic carbon dioxide (CO2) emissions and is an important tool in the effort to mitigate climate change. The ability of CCS to sequester emissions at a large scale makes it suitable to particularly emission-intensive sectors, such as the oil and gas sector in Canada. Many factors must be considered holistically to ensure the long-term success of large-scale CCS, such as the availability of emission sources, the design of a CO2 transportation network, the availability and capacity of suitable storage sites, the long-term fate of the injected CO2, the economic viability of the system, and the overall policy environment. Previous studies have considered these factors in demonstrating the viability of CCS in Alberta but have not done so holistically. We take a holistic approach in designing a large-scale integrated CCS system which includes CO2 capture from a hub of 10 large oil sands emitters, transport via a pipeline network, and permanent sequestration in the Nisku and Wabamun saline formations. We use a logistic model to forecast long-term oil sands hydrocarbon production and annual emissions, and ensure that all of the capturable emissions can be stored safely without exceeding pressure limits by modeling the long-term pressure evolution. The injected CO2 will be fully trapped in 6100-11000 years without migrating past the minimum storage depth. We calculate the capital expenditures for the pipeline and injection well components of the system and show that the amount of funding required is reasonable under the umbrella of federal infrastructure funding. This provides a comprehensive framework to ensure the long-term success of future CCS projects. / Thesis / Master of Applied Science (MASc) / The global community has increasingly recognized the importance of greenhouse gas emission reductions in the effort to mitigate climate change. Carbon capture and storage (CCS) is a technology that, with widespread use at a large scale, has the potential to significantly reduce emissions. However, due to the high cost and lengthy time commitment required, many factors ranging from emission sources to storage capacity to financial considerations must be accounted for to ensure the success of a CCS system. Here, we show that a large-scale CCS system in Alberta is viable and the captured CO2 can be safely stored in the long term. This framework can be used to ensure the success of future CCS projects.
15

Energy savings from flash steam recovery: An industrial case study

Goodarzvand-Chegini, F., Samiee, L., Rahmanian, Nejat 03 June 2023 (has links)
Yes / In oil, gas and petrochemical production complexes, steam pressure boosting technology is used to recover low-pressure steam, using both mechanical and thermal solutions to increase energy efficiency. The heat recovery from steam, especially flash steam produced in the return condensate lines, can be considered an economic and attractive solution. In an industrial case study in a gas plant located in the south-west of Iran, the LP condensate returns to the LP condenser waste with a flow rate of 96,000 kg/h and a pressure of 0.45 bar. As a result of the pressure drop, about 6800 kg/h of flash steam is generated. Therefore, in order to recover, the first the return condensate current enters a flash drum to separate the amount of steam produced by the flash operation. In this research, two strategies for increasing the pressure using a steam compressor and an ejector have been investigated. The simulation results show that flash steam recycling using steam compressors and ejectors results in energy saving for the refinery of about one million and USD100k per year, and also about 152 and 137 thousand tons equivalent to carbon dioxide emissions per year are reduced, respectively.
16

Options Based on CO<sub>2</sub> Emissions : A Comparison with Traditional Options

Nilsson, Martin, Kristiansson, Gustaf January 2009 (has links)
<p>Abstract</p><p>Title: Options Based on CO2 Emissions: A Comparison with Traditional Options</p><p>Seminar date: 2009-06-17</p><p>Course: Bachelor thesis in business administration, 15 ECTS</p><p>Authors: Gustaf Kristiansson, Martin Nilsson</p><p>Instructor: Bengt Kjellgren</p><p>Key words: Black & Scholes, Certified Emission Reductions, emission markets, European Union Allowances, options, pricing</p><p>Purpose: This study intends to compare traditional options with the CO2 based instruments EUAs and CERs options in the fields of pricing, cap and trade, political influence, economical effects and market function.</p><p>Methodology: A combined research methodology is used in this study, which includes both a quantitative and a qualitative approach. A deductive research approach is brought out over the whole study.</p><p>Theoretical perspectives: The theoretical framework is based upon previous empirical research concerning the fields in this study. The Black & Scholes formula for option pricing has a central position.</p><p>Empirical foundation: Market data has been used to analyse the field of pricing. Interviews have been conducted with actors on the European emission trading market for a further understanding of cap and trade, political influence, economical effects and market function.</p><p>Conclusions: We have in this research identified that the CO2 based market differs from the financial market when it comes to political decisions and price fluctuation. We have also identified that the CO2 based market is not mature enough for a complete internationalisation.</p> / En formell presentation utfördes ej pga utlandsstudier.
17

Options Based on CO2 Emissions : A Comparison with Traditional Options

Nilsson, Martin, Kristiansson, Gustaf January 2009 (has links)
Abstract Title: Options Based on CO2 Emissions: A Comparison with Traditional Options Seminar date: 2009-06-17 Course: Bachelor thesis in business administration, 15 ECTS Authors: Gustaf Kristiansson, Martin Nilsson Instructor: Bengt Kjellgren Key words: Black &amp; Scholes, Certified Emission Reductions, emission markets, European Union Allowances, options, pricing Purpose: This study intends to compare traditional options with the CO2 based instruments EUAs and CERs options in the fields of pricing, cap and trade, political influence, economical effects and market function. Methodology: A combined research methodology is used in this study, which includes both a quantitative and a qualitative approach. A deductive research approach is brought out over the whole study. Theoretical perspectives: The theoretical framework is based upon previous empirical research concerning the fields in this study. The Black &amp; Scholes formula for option pricing has a central position. Empirical foundation: Market data has been used to analyse the field of pricing. Interviews have been conducted with actors on the European emission trading market for a further understanding of cap and trade, political influence, economical effects and market function. Conclusions: We have in this research identified that the CO2 based market differs from the financial market when it comes to political decisions and price fluctuation. We have also identified that the CO2 based market is not mature enough for a complete internationalisation. / En formell presentation utfördes ej pga utlandsstudier.
18

Energy Conservation in the Canadian Residential Sector : Revealing Potential Carbon Emission Reductions through Cost Effectiveness Analysis

Ruiz Gomez, Alvaro January 2011 (has links)
The study uses Cost Effectiveness Analysis (CEA) as a method to analyse the economicand environmental impact of carbon dioxide (CO2e) emission abatement projects in theCanadian residential sector. It includes the more traditional environmental andeconomic criteria, yet it incorporates a behavioural component to the analysis. Adetailed account of the environmental specifications, emission reductions, and economicconsiderations of 11 abatement projects are used as input for the CEA. In addition,behavioural variables, such as disposable income, home ownership, and home repairskills, are taken into account to complement the study.The results indicate that the implementation of several of these carbon abatementprojects, such as insulating hot water pipes, replacing incandescent light bulbs,installing a programmable thermostat, etc. can bring about large emission reductionstogether with a net economic benefit, and in most cases, without altering the levels ofcomfort. This method can serve as a template for the evaluation of other related projectswithin the climate change mitigation context in Canada and in other countries, in anattempt to increase adoption rates of such projects.
19

Investigation of odor and its improvement in Kaohsiung city

Chen, Wen-wen 16 July 2006 (has links)
This study investigates characteristics of odorous materials and their odor intensities emitted from various commercial and industrial sources in the Kaohsiung City. An overview of odor complaints from the city people is presented and discussed. Results indicate that, due to the increasing people concerns about the odor emission problems, more frequent checks done by the City EPA officers, governmental assistances to the pollution makers on the pollution control technologies, and the enforcement of more stringent environmental protection regulations, odor-complaint cases in this city are decreasing in recent years. However, people are giving more attention to odors from food-cooking emissions and the associated complaint cases are increasing. Emissions from restaurants and plants become the two major odor sources in this city. For the plant emissions, odorous chemicals emitted from the Kaohsiung Refinery, located in northern Zouying District, were detected to be benzene, toluene, xylenes, and styrene. The Chianjhen storage and pumping station, located by the Kaohsiung Harbor, emits some 40 different chemicals. The majors among them are methanol, ammonia, ethylene, n-pentane, chlorodifluoromethane, methyl tert-butyl ether (MTBE), propylene, cyclohexane, styrene, acetone, 1,2-dichloroethane, propylene oxide and vinyl chloride. Prompt leaks from the storage tanks and during the loading and unloading operations account for the emissions. Plants located in the Chianjhen Export Processing Zone emit chemicals, mainly methyl methacrylate, toluene, propylene glycol monomethyl ether acetate (PGMEA), ammonia, ethyl acetate and ethanol, which cause only a few complaint cases. The emitted chemicals are among the ones used by the plants as feed stokes or solvents. Restaurant located in Chianjhen and Hsiogang Districts emit large amount of food-cooking odorants, however, the percentage of odorous complaining for the emissions is relatively high in the Zouying District as compared to the other administrative districts investigated in this study. Major components of the food-cooking emissions include hydrogen sulfide, dimethyl sulfide (DMS), dimethyl disulfide (DMDS), ammonia, and methylamine. Relative percentages among these chemicals depend on the cooking materials and styles. Results also indicate that industries or businesses, such as petrochemical, surface coating, paint manufacturing, fuel station, storage vessels, semiconductor manufacturing, adhesive tape manufacturing and cloth dry-cleaning, are major odor and chemical emission sources which need to be continuously implemented for getting more emission reductions in the near future.
20

Emissionsminderung in der Legehennenhaltung / Emission reduction at keeping of laying hens

Lippmann, Jens 29 August 2007 (has links) (PDF)
Untersuchungen zur Wirksamkeit emissionsmindernder Maßnahmen bei alternativen Legehennenhaltungsverfahren zur Reduzierung der Gase, Stäube und Keimbelastung

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