عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Cattle manure is made from liquid and solid waste. It contains the straw and stubble that is used for the cattle bed. Density of the cattle manure is inherently low, which is difficult and costly to transport. Pelleting is one method to solve this problem. The physical properties of the pelleted cattle manure was investigated in this study. The results showed that by increasing moisture content of the pellets from six to 20 percent, the bulk density of the pellets decreased from 660 to 630 kg/m3 and the particle density of the pellets increased from 1095 to 1583 kg/m3. The force required to rupture the pellets decreased from 61.3 kg at six percent moisture content to 19 kg at 20.0 percent moisture content. Durability of the pellets was variable from 34 to 53 percent in the range of moisture content and was maximum at 10 percent moisture content. The pellets could absorb a maximum of 8 percent moisture during 24 hours from air with 80 percent relative humidity.