Production Of Applicable Fuel Briquete From Coffee Husk And Pulps In The View Of Resource Recovery.

Abstract

Coffee husk and pulp are considered a waste material in most parts of the coffee processing industry, during the time of dry and wet coffee processing a huge amount of coffee husk and pulp are generated. These wastes are dumped into the water ways of the upper watersheds and the environment without any treatment as a result; it becomes a severe treat to the aquatic ecosystem and downstream water users. This problem can cause an impact on environment, living organism and human health. So, coffee husk and pulp waste can be utilized as resource materials through designing and operation of appropriate and effective waste utilization technologies. Thus, there is an urgent need to solve these problem through innovative technologies that integrate waste management and resource recovery. The objective of this study was to produce fuel briquette from coffee husk and pulp as an innovative technology for effective management of coffee processing waste by charring them in to a carbonized. The coffee husk and pulp were collected from coffee plantation and processing industry located at limmu kossa district of Jimma zone. An effective carbonize was used to carbonize the coffee husk and pulp. From 100 kg of coffee husk and pulp it was possible to get 32.73±9.09 kg of carbonized material. These carbonized materials were ground in to fine carbonized powder with the surface temperature of the carbonize during carbonization an average ranged from 63.75 to 142.75 ºC for coffee husk and pulp. Then simple extruder machine was used to make fuel briquette after mixing of this 2kg of powder with 1.5 kg cow dug binder with water at the ratio of (2:1.5). The mixing time, the number of fuel briquette produced and the compression force per minute of the extruder was dependent on the energy exerted by person who works on the machine. average MC, VM, AC, FC of the fuel briquettes a ranged from 8.4 ± 3.24%, 15.00 ± 3.83%, 17.41 ± 4.63%, 59.95 ± 7.0 %, respectively. While an average BD, CV of the fuel briquettes a ranged from, 151.23 ± 7.87% kg/m3, 19,212.95 ± 1621.601% KJ/Kg. apart from this average TFE, Br and IT of the fuel briquettes a ranged from 84.63 ± 4.57%, 11.88 ± 1.25% g/min, 41.63 ± 4.37% min, an experimental study and the laboratory analysis were conducted at Jimma agricultural mechanization research center and central geological laboratory. Therefore, enhancing the use of fuel briquette production by using coffee husk and pulp can reduce the disposal problem of wastes in coffee processing and coffee plantation industry area.