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| dc.contributor.author | ASHENAFI, FISEHATSION | |
| dc.date.accessioned | 2022-11-14T12:03:12Z | |
| dc.date.available | 2022-11-14T12:03:12Z | |
| dc.date.issued | 2022-08 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/14369 | |
| dc.description.abstract | Commercially blended cements composed of supplementary cementitious materials about 0.2 to 0.35 of a fold. Pozzolana, one of supplementary cementitious material, excavated from the outermost earth crust, in moist form requires drying effort not to impair quality and economy of the production process. The Mugher Cement Factory drying unit equipment was a direct heat rotary dryer and its burner was consuming diesel fuel with flow rate 2.0 m 3 /h for about a total of 812 hours per annum. This was equivalent to 38 million Ethiopian Birr per annum, a cost only from diesel fuel consumption. Green development in cement plants creates best available techniques in utilization of biomass with ≥14.5 MJ/Mg specific energy biomasses. In doing so, this case study was used various data from secondary sources for utilization of 2.70% of 134,400 metric tons of the annual disposed coffee husk in Jimma (Oromia Region) from coffee cherries dry processing plants. The existing burner and its accessories were not appropriate for coffee husk; hence the investment cost and design analysis of storage facility and material handling systems was performed. The investment should at least cover 39 million Ethiopian Birr for a better result of full substitution. The outcome would be 59 million Ethiopian Birr at the 5 th year of the investment. Its discounted payback period was 1.394 years and cash flow return on rate was 70.68% per each year. The investment would minimize greenhouse gases emission by 65% and increase the eco-efficiency by 70%. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | FACULTY OF CHEMICAL AND FOOD ENGINEERING | en_US |
| dc.title | INVESTIGATING THE SUBSTITUTION OF DIESEL FUEL WITH COFFEE HUSK A CASE STUDY IN MUGHER CEMENT FACTORY ROTARY DRYER | en_US |
| dc.type | Thesis | en_US |
