Assessment Of Tannery Solid Waste Management And Characterization A Case Of Ethio-leather Industry Private Limited Company (elico)

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Tanning industry generates large quantities of solid wastes during leather manufacturingrnprocess and subsequently during effluent treatment. From this point of view, in this studyrnassessment on solid waste management practices and physicochemical characterization of thernsolid wastes generated from tannery were made at Ethio-Leather Industry Private LimitedrnCompany (ELICO) so that to propose appropriate tannery solid waste management options.rnThe assessment made showed that the types of tannery solid wastes are de-dusted salt, rawrnskin trimmings, hair, fleshings, splitting waste, pickle trimmings, chrome shaving, crustrntrimmings, finished leather trimmings and sludge. Determination of the solid wasterngeneration rates using material balance analysis techniques shows that in processing 7,251rnton of cattle hide and sheep skins annually, the tannery generates a total of 4048.96 tonne ofrnsolid waste from beamhouse, tanning, re-tanning, finishing processes and effluent treatmentrnplant. It was found that 859kg of solid waste is generated during processing one tonne of wetrnsalted hide. Similarly, 262kg of solid waste is generated during processing the same amountrnof sheep skins. It was observed that beamhouse operations have more than 60% contributionsrnin generating the solid wastes. The solid wastes were characterized for pH, moisture content,rnvolatile organic compound, ash content, calorific value, carbon content, total nitrogenrncontent, carbon to nitrogen ratio, chromium content, sodium content and calcium contentrnusing standard solid waste analysis methods and the experimental result reveals that morernthan 90% of the solid wastes are organic. In order to propose solid waste management optionsrnfor tannery solid waste, solid waste management strategies (source reduction, recycling andrncomposting, waste transformation/waste to energy and landfilling) were reviewed and twornbasic thermo-chemical waste to energy technological options (incineration andrnpyrolysis/gasification), biochemical conversion process (Anaerobic digestion/biomethanation)rnand composting were found to be viable to manage tannery solid waste andrnproposed based on the physico-chemical characteristics of the solid waste

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Assessment Of Tannery Solid Waste Management And Characterization A Case Of Ethio-leather Industry Private Limited Company (elico)

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