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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.
121

An investigation into solid waste management in townships : the case study of Clermont, KwaZulu-Natal.

Ngeleka, Precious S'thabile. January 2010 (has links)
An environmental challenge that is currently plaguing the South African townships in the Metropolitan Area is the volume of solid waste being illegally disposed in open spaces along road verges as well as in streams. The research aims to identify the root cause of illegal dumping in the township of Clermont, Kwa-Zulu Natal. The researcher used quantitative, qualitative and observation methodologies to collect data from member’s of the community of Clermont. The severity of the problem will be measured by looking at different age groups; level of income per household as well as gender. In general waste management and environmental management has received little attention compared to other socio-economic problems like un-employment. As the bulk of the world’s population move from rural areas to urban areas, poverty is becoming an increasingly urban phenomenon. Environmental problems range from impairment of human health, economic and other welfare and extinction of the ecosystem. The urban poor bear the greatest burden of urban environmental risks. The most significant environmental challenge in South Africa is effectively management of waste. Currently the focus in South Africa has been on waste disposal rather than on waste prevention. Consequently there are no incentives for reducing waste and industries are not required to submit plans for waste management when commencing a new business. Waste management legislation is fragmented; as a result there is a lack of control in waste management. This research will investigate whether community members are aware of what is expected from them by the municipality and private waste collection companies. It will further analyse at the norm of waste disposal within the developing countries compared to developed countries. The study will attempt to provide practical solutions for the township of Clermont. The study has five chapters. The first chapter introduce the problem, objectives and hypothesis. The second chapter deals with the theoretical review to help the reader understand different cases and how waste management handled in different parts of the world. This has been done by looking at the international, national and local level, comparing waste management trends. The third chapter describe the study area in detail and different scientific methodologies researcher used to prove or disprove the hypothesis and objectives that were set in the first chapter. Chapter four analyses all the data that was collected from the community of Clermont and unpack other underlying factors that lead to poor waste management in this township. For example the researcher will conclude using the data collected if the frequency of waste collection is sufficient for the community and what can be done to minimize illegal dumping. Chapter five, which is the last chapter of this dissertation will suggest recommendations that can be used to correct all problems that associated with illegal dumping in Clermont Township. / Thesis (M.Sc.)-University of KwaZulu-Natal, Westville, 2010.
122

Characterization and engineering of Bacillus megaterium AS-35, for use in biodegradation of processed olive wastewater

Van Schalkwyk, Antoinette January 2005 (has links)
<font face="Times New Roman"><font face="Times New Roman"> <p align="left">The popularization and health benefits associated with the &ldquo / Mediterranean diet&rdquo / saw a world wide increase in the production and consumption of processed olives and olive oil. During the brining of table olives large quantities of processed olive waste water is seasonally generated. This blackish-brown, malodours liquid is rich in organic and phenolic compounds, which cause environmental problems upon discarding. Currently, processed wastewater is discarded into large evaporation ponds where it poses serious environmental risks. The biodegradation of organic substrates present in the olive wastewater is inhibited by the high concentrations of phenolic compounds. <font face="Times New Roman">In order to identify organisms which could potentially be used in the bioremediation of olive wastewater, 36 microbial strains were isolated from evaporation ponds in the Boland region of South Africa. Twenty five isolates were capable of growth on 50% olive wastewater and their bioremediation potential as well as their ability to produce valuable intermediate compounds were subsequently characterized. Based on the RPHPLC results, which showed that a number of chemical intermediates were produced in fermentation of olive wastewater, isolate AS-35 was selected for further analysis. Strain AS-35, identified as a </font><font face="Times New Roman"><em>Bacillus megaterium,</em> </font><font face="Times New Roman">was significantly influenced by the exposure to olive waste. The total cellular protein profile, generation time and cellular morphology of this isolate were dramatically affected by the introduction of olive waste. <font face="Times New Roman">This study investigated the differential gene display of </font><font face="Times New Roman"><font face="Times New Roman"><em>Bacillus megaterium</em></font> </font><font face="Times New Roman">following exposure to olive wastewater. Proteomic and transcriptomic differences of the organism cultured in nutrient rich LB and olive wastewater were compared. These results indicated that AS-35 expressed genes involved in glycolysis, tryptophan and nucleotide synthesis as well as the chaperones GroEL and DnaK during its growth in LB. In contrast, genes induced following the abolishment of glucose dependent catabolite repression, genes involved in biotin synthesis and &szlig / -oxidation of fatty or organic acids as well as a gene whose expression is regulated by stress induced s</font><font face="Times New Roman" size="1">B</font><font face="Times New Roman">-dependent regulon were expressed during olive waste growth.</font></font></p> </font></font>
123

Hydrogenases from sulphate reducing bacteria and their role in the bioremediation of textile effluent /

Mutambanengwe, Cecil Clifford Zvandada. January 2006 (has links)
Thesis (M.Sc. (Biochemistry, Microbiology & Biotechnology)) - Rhodes University, 2007.
124

Cleaner production : promoting and achieving it in the South Australian foundry industry /

Larwood, Andrew John. January 2000 (has links) (PDF)
Thesis (M.Env.St.)--University of Adelaide, Dept. of Geographical and Environmental Studies, 2000. / Bibliography: leaves 123-130.
125

Characteristics of a developing biofilm in a petrochemical wastewater treatment plant /

Perera, Kuruppu Arachchige Kalyani. January 2003 (has links)
Thesis (Ph.D.) (Biological Sciences) -- University of Western Sydney, 2003. / "Thesis submitted for the Degree of Doctor of Philosophy, University of Western Sydney, July 2003". Includes bibliography : leaves 253 - 276.
126

"Redox pumping" in the near surface Missoula aquifer iin the flood plain of the Clark Fork River surface, water and groundwater interaction and arsenic related chemistry at a compost facility near a wastewater treatment plant /

Smith, Donna Lee. January 2008 (has links)
Thesis (M.S.)--University of Montana, 2008. / Title from title screen. Description based on contents viewed Aug. 27, 2008. Includes bibliographical references (p. 90-94).
127

Management of hydrogen sulphide generation at a Kraft paper mill

Rava, Eleonora Maria Elizabeth. January 2008 (has links)
Dissertation (M.Sc. (Chemical engineering)) -- University of Pretoria, 2008. / Includes bibliographical references (p. 42-52)
128

A study of the effect of cyanide case hardening, copper and zinc plating wastes on specified groups of bacteria occuring in anaerobic sewage-sludge digestion a thesis in public health laboratory practice submitted in partial fulfillment ... Master of Public Health ... /

Sherron, Corrina M. January 1944 (has links)
Thesis (M.P.H.)--University of Michigan, 1944. / Cover title: The effect of certain industrial wastes on anaerobic decomposition.
129

Impact of pre-ozonation on distillery effluent degradation in a constructed wetland system /

Green, Jeffrey. January 2007 (has links)
Thesis (MSc)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.
130

Performance evaluation of central wastewater treatment plant : a case study of Hetauda Indutrial district, Nepal /

Shah Teli, Sushil Kumar, Usanee Uyasatian, January 2008 (has links) (PDF)
Thesis (M.Sc. (Industrial Ecology and Environment))--Mahidol University, 2008.

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