ant national legislation on the disposal of waste and waste disposal sites has been promulgated to regulate the dumping of unwanted materials. This development poses major legal compliance problems for the South African National Defence Force (S.A.N.D.F.) deployments in rural areas. The absence of municipal services to these areas and the unavailability of municipal dumpsites do not facilitate adherence to legislation. The development of an integrated waste management system for Defence represents an attempt to ensure compliance with national legislation. An overview and assessment of current waste management practices in the S.A.N.D.F. is provided in this document. The literature review focussed on the theory of waste management, the current situation with regard to sanitation in rural areas and a review of pertinent legislation, and provided the foundation for the development of questionnaires. The study then explored aspects of waste management and sanitation that were taken into consideration in preparing for operations . Data collection entailed interviews with senior members of the S.A.N.D.F. who are responsible for the planning of such projects. Thereafter an investigation was conducted into the waste management practices employed during deployments to rural areas. Data collection in this respect involved the administration of questionnaires to soldiers at temporary bases and during patrols, as well as an audit of the waste generated at the temporary bases, noting how refuse was managed under these conditions. These methods of primary data collection included interviews with various government and non-government officials. Interviews with senior members of the S.A.N.D.F. revealed that the planning and preparation for operations are core-function focused and that the integration of waste management and sanitation in the planning process is minimal and inadequate . The data obtained from questionnaires administered to the soldiers revealed that current waste management practices at the temporary bases and during patrols are considered to be satisfactory to the soldiers, as they are of the opinion that "we are doing the best we can under such circumstances". The waste audit revealed that ninety-eight percent of the waste generated in the study area is recyclable. Consequently, this study recommends that waste management methods be integrated into the planning process. Furthermore it is recommended that environmental education be included as a compulsory module during basic training and re-training for all members of the S.A.N.D.F., i.e. from senior management down to the most junior level. A long-term solution to improve on the current waste management practices is recycling. With regard to sanitation, the Director of Sanitation of the Department of Water Affairs and Forestry (D.W.A.F.) suggested that relevant members of the S.A.N.D.F. meet with members of D.W.A.F. and the Umkhanyakude Regional District Council, to discuss the inclusion of the S.A.N.D.F. in the current sanitation-provision projects in the study area. Short-term solutions were that the S.A.N.D.F. liaise with the G.I.S. section at D.W.A.F. This section will be able to provide the S.A.N.D.F. with information on the location of boreholes and hand-pumps (the only source of drinking water for the local population). The S.A.N.D.F. must ensure that waste disposal sites and field toilets, commonly referred to as go-karts, are located away from these water sources and, whenever possible, on higher ground. / Thesis (M.A.)-University of KwaZulu-Natal,Durban, 2004.

South Africa is facing numerous challenges that pertain to increasing water deficit and pollution of water resources. Only 40 out of 821 wastewater treatment works in South Africa achieved Green Drop certifications in the 2010 Green Drop assessments (DWA, 2011). This is not only threatening net water availability but also human health. South African water sources are comprised of 77 % surface water, 14 % return flows and 9 % groundwater (van Vuuren, 2009). This study was therefore intended to explore the quality, quantity and treatability of corn wet milling effluent resulting from Tongaat Hulett Starch Pty Ltd (THS) operations. THS is a major producer of corn derived starch and glucose in Africa. Amongst its three corn wet milling plants in Gauteng (Kliprivier, Germiston and Meyerton) and one in Western Cape (Bellville), 600000 tonnes of maize were processed in the 2011/2012 financial year. The objective of the study was to establish the wastewater footprint of the corn wet milling process. To achieve this, qualitative and quantitative characterisation studies were completed on effluents generated from the Germiston and Meyerton corn wet milling plants, respectively. This characterisation study was focused on volumetric and organic load analyses of the various sections of the corn wet milling process. A full scale anaerobic digestion treatability study of the Meyerton plant effluent was also conducted. The study results indicated that the combined effluent discharged to the Municipal sewer averaged between 2.9 and 3.1 m3/tonne of corn processed. The effluent generated resulted in an average chemical oxygen demand (COD) concentrations of between 6211 and 7790 mg/L, with suspended solid concentrations of between 635 and 899 mg/L. From the full scale anaerobic treatability study, a minimum of 87 % COD removal at organic volumetric loading rates (OLR) of between 0.3 and 3.9 kg COD/m3.d was achieved. It was concluded that corn wet milling effluent can be categorised as high strength in terms of COD concentrations. This type of effluent proved to be amenable to anaerobic digestion treatment. Anaerobic pretreatment of corn wet milling effluent can proportionately reduce pollution loading into the receiving municipal conventional wastewater treatment systems. / Thesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2013.

Internationally, shipping, boating and ancillary services are seen as significant contributors to degradation of the marine environment, affecting water quality, habitats and coastal amenity. As a result, it is important to ensure good practice with regard to safety issues when discharging or handling such wastes while vessels are in the port's jurisdiction. The international standards for regulating the prevention of marine pollution through ship generated waste are clearly outlined primarily in the United Nations Convention on the Law of the Sea 1982 ("UNCLOS") and the International Convention for the Prevention of Pollution from Ships1973 as amended by the Protocol of 1978 ("MARPOL 73/78"). The proposed study will explore compliance to MARPOL 73/78 Convention's requirement for governments to ensure the provision of adequate port reception facilities capable of receiving ship board residues and mixtures, containing oil, noxious liquids or garbage, without causing undue delay. The paper further reviews the implementation of the Conventions in the European Union and South Africa as it aims to provide a profile of the availability of waste reception facilities to assess their effectiveness in addressing the problem of marine pollution through ship generated waste. It is concluded that a variety of South African legislation is also applicable to marine pollution, but inadequately enforced. Further, that there was a considerable range of legislation intended to protect the North Sea and European waters in general from marine pollution but marine pollution from vessels is still considered to be a significant problem. In conclusion, it is recommended that South Africa should urgently develop effective mechanisms to monitor the enforcement oflegislation adequately. / Thesis (M.Com.)-University of KwaZulu-Natal, Durban, 2010.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

Microalgae have a variety of commercial applications, the oldest of which include utilisation as a food source and for use in wastewater treatment. These applications, however, are seldom combined due to toxicity concerns, for ethical reasons, and generally the requirement for cultivation of a single algae species for use as a feed supplement. These problems might be negated if a “safer” wastewater such as that from agricultural and/or commercial food production facilities were to be utilised and if a stable algae population can be maintained. In this investigation preliminary studies were carried out using an Integrated Algae Pond System (IAPS) for domestic wastewater treatment to determine the species composition in the associated High Rate Algae Ponds (HRAPs). The effect of different modes of operation, continuous versus batch, on nutrient removal, productivity and species composition was also investigated. Furthermore, indigenous species in the HRAP were isolated and molecularly identified as, Chlorella, Micractinium, Scenedesmus and Pediastrum. Additionally, the effect of the nor amino acid, 2-hydroxy-4-(methylthio)-butanoic acid (HMTBA) and its Cu-chelated derivative, on the growth and biochemical composition of Chlorella, Micractinium, Scenedesmus, Pediastrum and Spirulina was investigated. Species composition in the HRAP was stable under continuous operation with Micractinium dominating > 90% of the algae population. Under batch operation the population dynamic shifted; Chlorella outcompeted Micractinium possibly due to nutrient depletion and selective grazing pressures caused by proliferation of Daphnia. Higher species diversity was observed during batch mode as slower growing algae were able to establish in the HRAP. Nutrient removal efficiency and biomass productivity was higher in continuous mode, however lower nutrient levels were obtained in batch operation. HMTBA did not significantly affect growth rate, however treatment with 10 mg.L-1 resulted in slightly increased growth rate in Micractinium and increased final biomass concentrations in Chlorella, Micractinium and Spirulina (although this was not statistically significant for Micractinium and Spirulina), which are known mixotrophic species. Algae treated with Cu-HMTBA, showed reduced final biomass concentration with 10 mg.L-1, caused by Cu toxicity. Biochemical composition of the algae was species-specific and differed through the growth cycle, with high protein observed during early growth and high carbohydrate during late growth/early stationary phase. Additionally, 0.1 mg.L-1 HMTBA and Cu-HMTBA significantly reduced protein content in Chlorella, Micractinium, Scenedesmus and Pediastrum. In conclusion, operation of the HRAP in continuous culture provided suitable wastewater treatment with high productivity of an ideal species, Micractinium, for use in animal feed supplementation. This species had 40% protein content during growth (higher than the other species tested) and dominated the HRAP at > 90% of the algae population during continuous mode. Addition of HMTBA (> 1 mg.L-1) to algae cultivation systems and those treating wastewater, has the potential to improve productivity and the value of the biomass by enhancing protein content. Overall, the co-utilisation of microalgae for wastewater treatment and the generation of a biomass rich in protein, for incorporation into formulated animal feed supplements, represents a closed ecosystem which conserves nutrients and regenerates a most valuable resource, water.

Thesis (MPH.) -- University of Limpopo, 2016. / Background: Health care workers produce various types of waste in the course of rendering health care services. Each classification of waste must be disposed according to the prescribed guidelines. Improper disposal of waste may pose a danger to employees, patients and the environment. Health care workers must have adequate knowledge on disposal of medical waste. This study was therefore done to determine the knowledge and practices of health care workers on medical waste disposal. Objectives: This study aims to determine the knowledge and practices of health care workers on medical waste disposal at a hospital in the Mpumalanga Province in South Africa. Methods: A quantitative cross-sectional research approach was used at a regional hospital for the Mpumalanga Province in the Bushbuckridge Municipality under the Ehlanzeni District. The study respondents included professional nurses, enrolled nurses, enrolled nursing assistants, medical doctors, dental health and allied health staff. Data were collected through self-administered questionnaires analysed using International Business Management Statistical Package for Social Sciences 22 (IBM SPSS 22). Results: The results show that a high percentage of health care workers did not have adequate knowledge regarding disposal of medical waste but disposed medical waste appropriately. The results further show that knowledge and practice of health care workers had no association with age, gender and years of experience. There is an association between professional category and knowledge and practice of healthcare workers. Conclusion: Disposal of medical waste is the responsibility of all health care workers. There should be regular training of all categories of health care workers to improve their knowledge on disposal of medical waste and minimise the risks associated with improper waste management. This will further increase compliance with the guidelines of disposal of medical waste. Key words: Health care workers, medical waste, knowledge, practice, disposal

This research investigates interacting biological, chemical, and physical factors affecting the efficiency of microbiological wastewater treatment at the W. J. Smith Wood- Preserving Company in Denison, Texas. The treatment process consisted of collecting exhaust boiler water containing unidentified boiler treatment compounds, steam condensate contaminated with preservatives and wood extracts, plant process waters, and rainfall runoff from plant grounds. With a 5-minute residence time, wastewater was passed over 2 oxidation towers in series, each containing approximately 47,000 square feet of surface area. Suspended solids were removed from the wastewater before discharge. Various amino acids such as serine, aspartate, cysteine, phenylalanine, alanine, proline, glycine, histidine, and tyrosine significantly stimulated phenol degradation in the laboratory. The plant wastewater contained approximately 0.1 mg/l of several of the stimulatory amino acids. It was assumed that these concentrations provided maximal stimulation in the field situation. The plant wastewater also contained sufficient nitrogen to permit the organisms to degrade up to 100 mg phenol/1 of water examined. Amino acids in the wastewater probably serve as a source of microbial nutrition. Toxicity of the wastewater to fish was not caused by the presence of phenol, phenol degradation products, or traces of pentachlorophenol. The wastewater was rendered non-toxic by diluting with between 4 to 9 volumes of stream water. Toxicity could also be removed by chemical coagulation followed by activated carbon adsorption. As a result of biological treatment, the plant now discharges the treated wastewater into the municipal sewage treatment facility.

No description available.

New chemical substances being considered for use today are required by law to be evaluated for potential toxic effects upon disposal to the environment. A thorough evaluation, however, is complex, time-consuming, expensive, and impossible to perform on each new substance. In this study the potential toxic effects of a new carpet additive with antimicrobial properties and the associated process waste stream from a textile facility were considered. The wastewater from the rest of the plant was currently being treated in a land application disposal system. An assessment of the toxicity of the antimicrobial additive was made using conventional greenhouse studies. This assessment was compared to the results obtained from three short-term toxicity tests performed on the same set of solutions. The short-term tests used were a corn seedling bioassay, adenosine triphosphate measurements, and bacterial bioluminescence. These short-term tests were evaluated as to their utility as screening tools and as monitoring devices for toxic substances. / Master of Science