Thesis Open Access

CONVERSION OF TANNERY SOLID WASTE IN TO FLOWER POTS

MENGISTU BIRHANU BOGALE

Thesis supervisor(s)

Amare Tiruneh (PhD)

In Ethiopia, the practice of industrial solid waste control and management in leather processing industries is simple dumping to municipality land fill areas. The solid waste contains buffing dusts which is powdered form of chrome and collagen can easily enter to the surface and ground water especially during the summer season from landfill areas, which resulted Sevier land and aquatic animal health problem. Different research has been conducted to alleviate the problems of solid waste on the environment, but still the problem remains the main issue of the leather industry in the country. The aim of this research is to convert tannery solid waste specifically chrome shaving dust and green flesh waste in to usable products. The basis for this research is scientific researches published on scientific journals on the optimum condition for dechroming of leather shaving dust and the preparation of glue from leather processing bi-products, green fleshing waste. The green flesh waste is treated in alkaline condition and boiled to 92 to 1100c and then mixed with dechromed chrome shaving dust. Different proportions of glue and chrome shaving dust were mixed to get the best physical and chemical properties of the final product. This research showed that 50% dechromed buffing dust and 50% glue made from green fleshing waste gave good result. The leachability of the chrome from the final product gave us 2.9 mg/lit of chrome content, which is not in fact to the standard of the national standard, further research is required in this regard, and also it is observed that instead simple dumping, converting to different article like flower cultivation pot, leather board will minimize the environmental load from leather industries.
 

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