This study was carried out to investigate potential of coffee parchment to produce energy which supplements the current energy demand of cement industry. Related to this different instruments and ASTM standard procedures were used for chemical, proximate and ultimate analysis of raw coffee parchment and pellet. Moreover, heating value, Ash oxide analyses and trace metal analysis were examined in order to investigate combustion properties and quality of the product to be used in clinker production and the results were compared. The analysis result showed the quantity of coffee parchment generated were estimated to be in the range of 10,583.5 to 12,460.5 tonnes per year and found within a total distance of 41.6 km. However, it has been used inefficiently and irregularly by the local population as a cooking fuel. Ultimate analysis result confirmed higher C (45.5%) and H(6.5%) and lower N (0.4%) and S (0.1%) contents in the coffee pellet as compared to most commonly used biomass fuel and meet the standards specified for non-wood pellets. This implies that it has suitable property for alternative fuel use. Moreover, moisture content (11.2%) and ash content(5.97%) of the pellet is less than the amount specified in most biomass fuel and in accordance with ISO 17225-6 standard for non-wood pellets. Improved gross heating value (HHV) from 18.56 and 27.95 MJ/kg and Ash oxides contents as a result of pelletizing of coffee parchment makes coffee parchment to have comparable values to common fuel woods and coal.
The author has Ph.D. in Environmental science from the University of Rostock, Germany in 2013. He is currently serving as an Assistant Professor and Associate Dean for Undergraduate Program in ASTU.
From 2014-2017, he was a visiting scientist at the Institute of Organic Agriculture (FIBL) in Frick, Switzerland, working as a trainer and technical advisor for ROSSA- Resource Oriented Sanitation Service Adama project, and Soil and More, Ethiopia. A consultant in NAMA COMPOST project Adama
As of June, 2018, he is the owner and vice manager of AFRECO waste management plc based in Adama with a mission to achieve lesser waste and more valuable products from waste in communities and transforming cities by providing knowledge based solutions.