Metal Manufacturing Industry Waste Management: A case of Kaliti Metal Products Factory

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Addis Ababa University


Waste management (WM) looks to be one of the key topics in the manufacturing industry for economical sustainability or a shift towards a circular model of resource consumption, health of nations as well as environmental protection in present days. The Purpose of the study is to investigate the current situation of waste management in metal manufacturing industry at the case company, Kaliti Metal Products Factory, in Ethiopia. The research methodology followed was applying both qualitative and quantitative methods for the case study approach. Descriptive statistical package for social sciences (SPSS) and Microsoft Excel were applied to analysis of the collected data. In this research the primary data were gathered through questionnaires, structured interviews or group discussion and the secondary data sources were collected through literature reviews from different sources of scientific journals, and observations. On factory shop floor survey was also done to investigate the major problems of the metal manufacturing industries related to waste management, in the case company, Kaliti Metal Products Factory (KMPF). The results and findings obtained from the data analyses shows 75 % of the total production time for standard products and 56 % of the total production time for other engineered products were found waiting time waste according to lean principle; 331.205 ton of metal wastes from standard products department and 23.15 ton of metal wastes from other engineered products departments, totally 377.505 tons of metal wastes were found. The main sources (causes) of metal wastes in the case company were found to be technology constraints, selecting the lowest price bidder suppliers and sub-suppliers, poor time management (waiting time), damage of output products and poor technology of machines and equipment, lack of contribution of the management system aiming at waste minimization, lack of transformed industrial design, Lack of 100% Recycling and Recovery, and New infrastructure & system thinking were considered as the extreme significant by the respondents for the cause of wastes in the case company. In general, the mitigation measures to practice for reducing metal products wastes in metal manufacturing industry are, management initiative & focus, giving training for metal products manufacturing personnel on causes and remedies of metal wastes through the integration of the Lean & the Zero Waste Management. So, proper awareness and attention to waste management in the metal manufacturing industry in Ethiopia can improve the profitability and competitiveness of the metal manufacturing industry significantly, particularly for the case company, Kaliti Metal Products Factory (KMPF) since zero metal manufacturing waste is disposed directly to landfill or to incineration without energy recovery



Metal Waste, Lean, Zero Waste, waste management, metal manufacturing industry