A comparison of waste lubricating oil treatment techniques
- Authors: Diphare, Motshumi J. , Muzenda, Edison , Pilusa, Tsietsi J. , Mollagee, Mansoor
- Date: 2013
- Subjects: Waste oil , Waste management , Waste lubricating oil
- Type: Article
- Identifier: http://ujcontent.uj.ac.za8080/10210/364727 , uj:4967 , http://hdl.handle.net/10210/13068
- Description: Waste lubricating oil is a resource that cannot be disposed of randomly due to the presence of pollutants. In response to economic problems and environmental protection, there is a growing trend to regenerate and reuse waste lubricants [1]. The recovery techniques discussed in this paper are reprocessing, rerefining and incineration of waste lubricating oil. The major objective of this paper is to analyze and compare the regenerative technologies, thus creating the foundation for government, the private sector and other stakeholders in policy formation and selection of recovery techniques.
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Municipal solid waste utilisation for green energy in Gauteng province - South Africa : a review
- Authors: Pilusa, Tsietsi J. , Muzenda, Edison
- Date: 2014
- Subjects: Biogas , Solid waste management - South Africa - Johannesburg , Green energy
- Type: Article
- Identifier: uj:4958 , http://hdl.handle.net/10210/13059
- Description: This short paper discusses the potential of utilizing various municipal solids waste streams as feed stock for green energy production. These waste streams includes but not limited to mixed combustible waste, rubber and plastic waste, health care risk waste, organic biodegradable waste, biomass and sewage sludge. Technologies such as anaerobic digestion, gasification and pyrolysis have been reviewed relative to the location and waste stream quantities in the selected sample area. It was discovered that there are environmental, social and economic benefits in waste to energy approach for the waste streams reviewed. The feasibility of implementing such technologies is mainly dependent on the initial capital investment and operational cost of the facility. Other factors include the size of the waste stream, product price and demand.
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Low pressure binder-less densification of fibrous biomass material using a screw press
- Authors: Pilusa, Tsietsi J. , Huberts, Robert , Muzenda, Edison
- Date: 2012
- Subjects: Biomass fuel , Fuel briquettes
- Type: Article
- Identifier: uj:6039 , http://hdl.handle.net/10210/10439
- Description: In this study, the theoretical relationship between pressure and density was investigated on cylindrical hollow fuel briquettes produced of a mixture of fibrous biomass material using a screw press without any chemical binder. The fuel briquettes were made of biomass and other waste material such as spent coffee beans, mielie husks, saw dust and coal fines under pressures of 0.878-2.2 Mega Pascals (MPa). The material was densified into briquettes of outer diameter of 100mm, inner diameter of 35mm and 50mm long. It was observed that manual screw compression action produces briquettes of relatively low density as compared to the ones made using hydraulic compression action. The pressure and density relationship was obtained in the form of power law and compare well with other cylindrical solid briquettes made using hydraulic compression action. The produced briquettes have a dry density of 989 kg/m3 and contain 26.30% fixed carbon, 39.34% volatile matter, 10.9% moisture and 10.46% ash as per dry proximate analysis. The bomb calorimeter tests have shown the briquettes yielding a gross calorific value of 18.9MJ/kg.
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