• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 182
  • 66
  • 14
  • 6
  • 5
  • 5
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • Tagged with
  • 375
  • 204
  • 159
  • 116
  • 101
  • 72
  • 70
  • 50
  • 48
  • 47
  • 45
  • 44
  • 43
  • 42
  • 35
  • 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.
31

A comparison & contrast of Hong Kong and overseas practices in landfill gas management /

Kam, Chung-hau, Brian. January 1998 (has links)
Thesis (M. Sc.)--University of Hong Kong, 1998. / Includes bibliographical references (leaf 71-73).
32

Instrumented permeable blankets for estimating subsurface hydraulic conductivity and confirming numerical models used for subsurface liquid injection

Mukherjee, Moumita. January 2008 (has links)
Thesis (PH. D.)--Michigan State University. Civil Engineering, 2008. / Title from PDF t.p. (viewed on Sept. 2, 2009) Includes bibliographical references (p. 267-278). Also issued in print.
33

Redevelopment of Sai Tso Wan landfill recycling theme park /

Lee, Kit-ying. January 1995 (has links)
Thesis (M.L.A.)--University of Hong Kong, 1995. / Includes special study report entitled : Planting on landfill. Includes bibliographical references. Also available in print.
34

The economic externalities of solid waste treatment facilities /

Lo-Quiroz, Wai-chi, Yany. January 2006 (has links)
Thesis (M. Sc.)--University of Hong Kong, 2006.
35

Characterization of Combustion Profiles of Co-Fired Coal/Biomass/Limestone Samples by TG and TG/FTIR

Hutchinson, Erik Jon 01 July 1993 (has links)
Recent concerns over declining landfill space and a renewed interest in waste-to-energy technologies have increased the possibilities of co-firing different types of fuels in fluidized bed combustion systems. Fluidized bed combustion systems are idea for co-firing because of their ease in heat conversion and ability to burn a wide range of fuels. Additionally, thermal analytical techniques can be used to screen fuel blends for the fluidized bed combustion systems at a lower cost than directly firing the fuel blends in pilot systems. Three coals, three different municipal solid wastes (MSW), one limestone were combined into nine series of binary fuel mixtures to determine the possible Observed/Theoretical ratios caused by the MSW and /or the limestone to the coal’s combustion profile. After doing so, optimum percentage combinations were determined that should combust efficiently in fluidized bed systems. Consequently, after the combinations were optimized, evolved gas analysis showed a possible 50% reduction in SO2 emission through absorption by limestone.
36

The effect of different soils on methane oxidation from landfills

Mokoena, Gavin T. 19 August 2008 (has links)
Abstract Biological oxidation of methane is and important constraint on the emission of this gas from areas, such as landfills to the atmosphere. We studied the effect of covering soils on methane emission in landfill assimilation. Microbial evaluation was done on virgin soil and later on soils used as covering material. This soil was later treated differently to see different effects that has on methane emission. Treatments applied were addition of compost in soil, moistured soil with methanotroph culture instead of water. Although methane was produced from the landfill, it was not as documented between 45 and 50%. We got between 6 and 18% production. In all the soils tested the uncultivated soil had the minimal emission as it emitted 0% methane. Sand, however, had some oxidation effect. The problem was that it is porous therefore gas migration is not restricted. This shows that the oxidative bacteria are available naturally is soils, but gets abandoned as the conditions favours their growth. The treatments done to soils had little effect as methane oxidation was not influenced or altered. This can be liked into in details. There have been some good observations in the assimilated landfill. As the landfill was not controlled the pH dropped and this in return produced more hydrogen as compared to methane. With all the altered gas balance produced the leachate changed.
37

Modeling microbiological and chemical processes in municipal solid waste bioreactor development and applications of a three-phase numerical model BIOKEMOD-3P /

Gawande, Nitin A. January 2009 (has links)
Thesis (Ph.D.)--University of Central Florida, 2009. / Adviser: Debra R. Reinhart. Includes bibliographical references.
38

Feasibility of using electromagnetic geophysical methods to investigate landfills and disturbed areas as a threat to ground-water quality in Pima County, Arizona

Burchard, Gary Curtis, January 1989 (has links) (PDF)
Thesis (M.S. - Hydrology and Water Resources)--University of Arizona, 1989. / Includes bibliographical references (leaves 246-250).
39

Determination of fluorochemicals in waste-dominated aqueous systems /

Huset, Carin A. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 88-95). Also available on the World Wide Web.
40

Structural performance of plastic pipe used for landfill leachate collection

Kastner, Robert Eugene Lee. January 1992 (has links)
Thesis (M.S.)--Ohio University, August, 1992. / Title from PDF t.p.

Page generated in 0.0439 seconds