• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 424
  • 331
  • 71
  • 57
  • 20
  • 16
  • 13
  • 9
  • 8
  • 7
  • 6
  • 3
  • 3
  • 2
  • 2
  • Tagged with
  • 1103
  • 1103
  • 303
  • 291
  • 273
  • 179
  • 168
  • 150
  • 144
  • 123
  • 123
  • 121
  • 104
  • 86
  • 83
  • 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.
71

Gypsum Wallboard: A Study Examining Wallboard Waste Management Options for Southern Ontario

van de Merwe, Susan January 2009 (has links)
In 2005, the Recycling Council of Ontario published a report that identified the construction industry as one sector that did not manage its waste in an environmentally appropriate manner. In this report, Let’s Climb Another Molehill, 15 case studies were executed to understand why this industry was neither handling nor disposing its waste properly in Southern Ontario. A set of generic recommendations was generated to help improve the management of this industry’s waste. Unfortunately the scope of the report was too broad to support conclusions about the management of specific types of problematic construction waste. The aim of this thesis is to narrow what was done in Let’s Climb Another Molehill to focus only on gypsum wallboard. The purpose of this research is to determine what options are the most desirable and feasible to deal sustainably with gypsum wallboard waste in Southern Ontario, both now and in the future. All recommendations offered are case specific. A number of methods have been utilized to obtain the information needed to formulate appropriate recommendations to deal with wallboard. Information learned through the literature, witnessed through the observation sessions, and acquired through the interviews led to two unique option categories: 1) alternative materials and 2) change in practices. To evaluate these options, a set of criteria was created based on the concepts of sustainability and integrated waste management (IWM). This sustainable IWM criteria set allowed for consistent evaluation of the options. To improve the recommendations, the sustainable IWM criteria were refined to better deal with each of the two categories of options. When the sustainable IWM criteria for evaluating alternative materials were applied, gypsum wallboard was found still to be the best interior wall material to use today. However, applying the sustainable IWM criteria for evaluating change in practices showed that the problem with using this product lies with its management and, therefore, the remaining recommendations focus on improving the creation, use and disposal of wallboard. Many of these recommendations can easily be adopted to help eliminate inappropriate wallboard management practices. This research was able to identify areas where problems arose and to offer feasible options to improve environmentally inappropriate behaviors associated with wallboard management. Although numerous recommendations are offered, the three fundamental recommendations that will lead to the biggest change include: 1) greater number of educational programs devoted to the construction industry; 2) stricter regulations and better enforcement; and 3) a dramatic increase in landfill tipping fees. If these three recommendations were implemented, it is believed that they will play a positive role in managing gypsum wallboard waste in a more sustainable manner.
72

Gypsum Wallboard: A Study Examining Wallboard Waste Management Options for Southern Ontario

van de Merwe, Susan January 2009 (has links)
In 2005, the Recycling Council of Ontario published a report that identified the construction industry as one sector that did not manage its waste in an environmentally appropriate manner. In this report, Let’s Climb Another Molehill, 15 case studies were executed to understand why this industry was neither handling nor disposing its waste properly in Southern Ontario. A set of generic recommendations was generated to help improve the management of this industry’s waste. Unfortunately the scope of the report was too broad to support conclusions about the management of specific types of problematic construction waste. The aim of this thesis is to narrow what was done in Let’s Climb Another Molehill to focus only on gypsum wallboard. The purpose of this research is to determine what options are the most desirable and feasible to deal sustainably with gypsum wallboard waste in Southern Ontario, both now and in the future. All recommendations offered are case specific. A number of methods have been utilized to obtain the information needed to formulate appropriate recommendations to deal with wallboard. Information learned through the literature, witnessed through the observation sessions, and acquired through the interviews led to two unique option categories: 1) alternative materials and 2) change in practices. To evaluate these options, a set of criteria was created based on the concepts of sustainability and integrated waste management (IWM). This sustainable IWM criteria set allowed for consistent evaluation of the options. To improve the recommendations, the sustainable IWM criteria were refined to better deal with each of the two categories of options. When the sustainable IWM criteria for evaluating alternative materials were applied, gypsum wallboard was found still to be the best interior wall material to use today. However, applying the sustainable IWM criteria for evaluating change in practices showed that the problem with using this product lies with its management and, therefore, the remaining recommendations focus on improving the creation, use and disposal of wallboard. Many of these recommendations can easily be adopted to help eliminate inappropriate wallboard management practices. This research was able to identify areas where problems arose and to offer feasible options to improve environmentally inappropriate behaviors associated with wallboard management. Although numerous recommendations are offered, the three fundamental recommendations that will lead to the biggest change include: 1) greater number of educational programs devoted to the construction industry; 2) stricter regulations and better enforcement; and 3) a dramatic increase in landfill tipping fees. If these three recommendations were implemented, it is believed that they will play a positive role in managing gypsum wallboard waste in a more sustainable manner.
73

Integrated municipal solid waste management approach in adaptation to climate change in Mekong Delta / Cách tiếp cận quản lý tổng hợp chất thải rắn nhằm ứng phó biến đổi khí hậu ở Đồng Bằng Sông Cửu Long

Nguyen, Xuan Hoang 15 November 2012 (has links) (PDF)
A fast increase of municipal solid waste (MSW) has become the most concerning environmental problem in Vietnam, especially in the Mekong Delta region, that is considered one of the most vulnerable deltas to climate change in the world. There are 12 provinces and one central city in MD that occupy about 12% of the whole area of the nation with 5% of MSW generated. However, there is no currently effective management system in place for treatment and management of MSW in the MD. Landfill is the sole treatment option for MSW right now. With a low-level plain, MD is facing the most serious environmental problem in the near future with an effect of climate change and sea level rising. The landfill should not be considered for long-term use in this area. Suitable treatment options for MSW should be applied together with other solutions for reuse, recycling and reduction of MSW as well as pollution prevention issue. An integrated MSW management approach in adaptation to climate change is considered necessary. / Sự tăng nhanh chất thải rắn đã trở thành vấn đề vấn đề môi trường được quan tâm nhất ở Việt Nam, đặc biệt là ở khu Đồng bằng Sông Cửu Long một trong những đồng bằng dễ bị tổn thương bởi sự biến đổi khí hậu nhất trên thế giới. Đồng bằng Sông Cửu Long có 12 tỉnh và một thành phố trực thuộc trung ương, chiếm 12% diện tích của cả nước với khoảng 5% lượng chất thải rắn phát sinh. Tuy nhiên, hiện nay chưa có một hệ thống quản lý hiệu quả cho chất thải rắn ở khu vực. Bãi rác là lựa chọn xử lý duy nhất ở thời điểm này. Với cao độ thấp, Đồng bằng Sông Cửu Long đang đối mặt với ảnh hưởng nghiêm trọng của các vấn đề môi trường trong tương lai gần bởi ảnh hưởng của sự biến đổi khí hậu và nước biển dâng. Về lâu dài bãi rác không nên sử dụng ở khu vực này. Các lựa chọn xử lý thích hợp cho chất thải rắn cần được áp dụng cùng với các giải pháp khác như tái sử dụng, tái chế và giảm thiểu chất thải rắn cũng như các giải pháp ngăn ngừa ô nhiễm. Cách tiếp cận quản lý tổng hợp chất thải rắn nhằm ứng phó sự biến đổi khí hậu cần được xem xét.
74

A guideline for local authorities : legal and functional requirements for the drafting and implementation of waste management by-laws / N.S. Massyn

Massyn, Nicolai Spies January 2005 (has links)
By-laws are considered to be one of the primary tools of local government to enable them to manage and regulate the affairs of their constituent jurisdictions. It is therefore of critical importance that bylaws are current, not in conflict with provincial and national legislation, efficient and in line with practical requirements, and empowers the local authority sufficiently to manage its own affairs. There are three major causes that require local authorities to change and update by-laws. The first major cause is the reorganisation of the pre-1994 municipal boundaries. The second is the change to a constitutional dispensation that created three distinct spheres of government with their defined areas of legislative and executive powers. The third is the new order environmental legislation and philosophy that is in line with internationally accepted principles of sustainable development and human rights, and differs from the pre- 1994 legislation. The principle of cooperative governance requires local authorities not to be in conflict with other organs of state or national and provincial legislation. The result is that many local authorities require new by-laws, including waste management by-laws. Many such projects were undertaken by local authorities, one by the City of Johannesburg as part of the iGoli 2000 project. The by-laws also have to adequately capacitate the local authority to regulate all aspects of waste management in a practical and functional manner. These practical and functional requirements must be considered and included in the waste management by-laws where relevant. A guideline should as a minimum cover the following elements: -ensuring cooperative governance, -ensuring compliance with specific requirements set by the Constitution and other legislation such as the Municipal Systems Act, -alignment of by-laws with the legal mechanisms available for service delivery, and -ensuring it provides guidance on what elements should be considered to meet the practical and functional requirements of local authorities. This dissertation provides a guideline that meets criteria set out in legislation, policies and strategies. The discussion encompasses a vast field of the law and waste management practice, and attempts to provide local authorities with an introduction and references to the most salient aspects that has to be considered when drafting and implementing waste management by-laws. / Thesis (M. Environmental Management)--North-West University, Potchefstroom Campus, 2006.
75

A guideline for local authorities : legal and functional requirements for the drafting and implementation of waste management by-laws / N.S. Massyn

Massyn, Nicolai Spies January 2005 (has links)
By-laws are considered to be one of the primary tools of local government to enable them to manage and regulate the affairs of their constituent jurisdictions. It is therefore of critical importance that bylaws are current, not in conflict with provincial and national legislation, efficient and in line with practical requirements, and empowers the local authority sufficiently to manage its own affairs. There are three major causes that require local authorities to change and update by-laws. The first major cause is the reorganisation of the pre-1994 municipal boundaries. The second is the change to a constitutional dispensation that created three distinct spheres of government with their defined areas of legislative and executive powers. The third is the new order environmental legislation and philosophy that is in line with internationally accepted principles of sustainable development and human rights, and differs from the pre- 1994 legislation. The principle of cooperative governance requires local authorities not to be in conflict with other organs of state or national and provincial legislation. The result is that many local authorities require new by-laws, including waste management by-laws. Many such projects were undertaken by local authorities, one by the City of Johannesburg as part of the iGoli 2000 project. The by-laws also have to adequately capacitate the local authority to regulate all aspects of waste management in a practical and functional manner. These practical and functional requirements must be considered and included in the waste management by-laws where relevant. A guideline should as a minimum cover the following elements: -ensuring cooperative governance, -ensuring compliance with specific requirements set by the Constitution and other legislation such as the Municipal Systems Act, -alignment of by-laws with the legal mechanisms available for service delivery, and -ensuring it provides guidance on what elements should be considered to meet the practical and functional requirements of local authorities. This dissertation provides a guideline that meets criteria set out in legislation, policies and strategies. The discussion encompasses a vast field of the law and waste management practice, and attempts to provide local authorities with an introduction and references to the most salient aspects that has to be considered when drafting and implementing waste management by-laws. / Thesis (M. Environmental Management)--North-West University, Potchefstroom Campus, 2006.
76

Förändringen av MARPOL Annex V år 2013 : Hur den implementerats och upplevts ombord

Rönnblom, Jenny, Sigurdh, Oskar January 2014 (has links)
Första januari år 2013 trädde den senaste versionen av MARPOL Annex V i kraft. Denna studie har genom en litteraturstudie samt intervjuer med nautiska befäl sökt svar på vilka förändringar som skedde, hur dem implementerats ombord samt hur förändringarna upplevts av sjöfarare. Syftet med studien var att bidra med en pusselbit till bilden av hur avfallssortering utövas till sjöss samt hur arbetet med det upplevs. Litteraturstudien kom fram till att den stora skillnaden är att papper, glas, metall samt aska inte längre får slängas i havet. Inom specialområde får endast matavfall destruerat genom avfallskvarn slängas överbord. Intervjuerna visade att respondenterna inte påverkats nämnvärt av förändringarna då de redan tidigare följt strängare riktlinjer och regelverk för avfallshantering. Den mest betydande arbetsuppgiften för avfallsansvarigt befäl ombord är att underrätta övrig besättning om hur avfall skall hanteras. Dock efterfrågas av samtliga befäl ytterligare internationell lagstiftning riktat mot hamnar för en global likformighet för att underlätta arbetet som annars kan ses som krångligt och omotiverat. / The first of January 2013 came an updated version of MARPOL Annex V. This research has been made with a literature study and interviews with nautical officers searched for answers to what changes have been made, how they are implemented on board and how the changes experienced by seafarers. The purpose of this study was to contribute how the waste handling works onboard, how waste sorting exercise at sea and how the work is perceived. The literature study found that the major difference is that paper, glass, metal and ashes can no longer be thrown in the sea. Food waste inside special areas must have been processed through a food waste disposer before thrown overboard. The interviews showed that respondents are not significantly affected by the changes as they have already followed a more strict version of the regulations for waste disposal. The most important task for the waste responsible officer on board is to inform the rest of the crew on how waste should be managed onboard. All the respondents ask for international legislation directed at ports of a global uniformity in order to facilitate the work that otherwise might be viewed as burdensome and unjustified.
77

International trade in hazardous wastes an empirical analysis /

Rajamani, Kamala, January 1995 (has links)
Thesis (Ph. D.)--University of Maryland at College Park, 1995. / Vita. Includes bibliographical references (leaves 141-147).
78

Värmande sopor : En analys av svensk avfallshantering från 1975–2005

Elvin, Angelica January 2018 (has links)
The subject of this essay is waste and waste management in Sweden during the years1975-2005. The purpose of this investigation is to identify which factors that have affectedthe development of waste management from a political angle in order to identifycharacteristic features of the period in terms of waste management regime. The investigationorigins from Ylva Sjöstrand’s thesis about resource recovery, incineration and tippingof waste in Stockholm 1900-1975 and the theoretical framework in this essay is based onher thesis.By analysing three propositions from the years 1975, 1993 and 2003 concerning wasteand waste management I will argue that the new waste management regime that dominatedSweden during 1975-2005 is called sustainability regime. The name sustainabilityregime is therefore the result which this essay leads to.
79

Investigation and development of a framework for medical waste management

Alhadlaq, Abdullah Abdulaziz January 2014 (has links)
The Kingdom of Saudi Arabia is the largest country in the golf states and one of the richest oil producing countries. Saudi population is nearly 27million; in addition, Saudi Arabia receives millions of people from around the world for Islamic pilgrimages. Moreover, Saudi is hosting hundreds of thousands of international professionals and labourers. Hence, the country infrastructure and services have been in the top agenda to be modernized in order to cope with new demand for better quality of life for a rich country. The healthcare sector is one of the key sectors which requires a special on going attention, particularly medically generated waste. Therefore, this research work has been conducted to investigate the status of medical waste management in the capital city; Riyadh. The prime aim of this research work is to propose a strategic framework which can be used as a roadmap for the different stakeholders. This will contribute to the enforcement of better handling and treatment of medical waste and more importantly prevent and control the spread of diseases or harm might be caused by poor handling of medical waste. The aim of the research has been achieved through; the critical review and analysis of the relevant literature, which has revealed the noticeable gap and lack of scientific studies of the proposed field. Appropriately, the findings of the research has contributed to filling the gap of the knowledge as well as serving as a milestone for further research work in this very important field. By surveying Riyadh’s hospitals and other national and international reports has. This allowed the presentation of the facts and indications of the current status of medical waste in Riyadh City. To obtain in-depth knowledge and gather the important findings concerning the medical waste management, focused; interviews of different medical professionals from various hospitals were conducted. This research has revealed more important factors that need to be addressed. These findings were used to propose the framework, which has been formed to enable resolving the challenges of the integration, of the awareness element though Islamic principles, within the Saudi system. The proposed framework has been evaluated by committee of medical professionals and has been accepted as good roadmap and appropriate solution that address the main aim of this research work. Finally, the research work is just a step towards the establishment of a proper biomedical waste management system in the Kingdom of Saudi Arabia. Some recommendations for future implementation are suggested at the end of this thesis.
80

Opportunities and challenges of a Sustainable Solid Waste Management in Tsumeb, Namibia

Croset, Elliott January 2014 (has links)
The handling of wastes is an eternal problem, all societies are confronted to this issue. Their origins are very diverse, they could come from industrial activities, power production, shops, retail or household for instance. While in developed countries the collection is generally efficient and the disposal safe, the situation in developing countries is different. The municipal budget does not allow the construction of advanced and expensive methods of disposal and the collection suffer from the age of vehicles. This generalisation is nevertheless not totally truth as the situation is extremely depend on the country but also of the city considered. Each city will need to adapt its waste management according to its size, climate, wealth, culture, etc... This report will focus on a Namibian medium town, Tsumeb. The aim is to be able to draw a clear picture of the waste management currently achieved. When the situation is well known, new directions to make Tsumeb refuse management more sustainable can be decided. Implementing progressively an integrated waste management (IWM) is a solution to the waste problem as it is considering economic, social and environmental impacts. A waste characterization was done in order to know the exact amount and composition of the waste generated in Tsumeb to implement afterwards the most suitable solution. The refuse of Tsumeb are surprisingly very similar to high income country. Moreover the stakeholders involved in recycling were investigated. A small informal sector is already making a living by recycling a few materials as glass bottle and cans. There is also a possibility to include extra stakeholder in the recycling process in Tsumeb. Recycling companies, recycling organization or investors are also important stakeholder who can be include in Tsumeb recycling plan. Developing recycling in Tsumeb is facing some challenges but it is also full of opportunities. The main issue when it comes to recycling in Namibia is the long transportation distances what makes it expensive. Furthermore, most of the recovered materials have to be sent in South Africa because Namibia does not possess the necessary industries to recycle paper and glass for instance. On another hand the presence in Tsumeb of a small informal sector already working with waste is promising. The workers could be more organized and the municipality can also helping them with logistic and storage to improve the recycling done. The dump site will also be close within the next years and a new sanitary landfill will be open. It will be a great opportunity to implement a recycling facility on site. Informal workers working on the landfill will be more controlled, to avoid for instance children labour. Some stricter health and safety measure can be decided, to give better working condition to the informal manpower. The development of recycling activities in Tsumeb will be highly beneficial to the community. It will create jobs for the poorest part of the population, decrease the cost of the waste management, reduce the pollution and stimulate the local economy.

Page generated in 0.0879 seconds