CONVECTIVE DRYING OF POULTRY MANURE BY DIFFERENT AIR SPEEDS

The high content of water in poultry manure creates problems for its collection, transport and storage in the large scale farms with laying hen breeding. Other problems with high moisture of manure are in the case of application of manure in the crop production or in the processing for another purpose of the use. The aim of this paper is to inform about the experimental and theoretical investigations of moisture content reduction from poultry manure by drying. Based on the experimental data we found the theoretical drying coefficient, useful for description and modelling of the drying process, calculated the theoretical results of moisture removal and compared with the experimental results obtained from the measurement. Using the experimental data with different convective air speed in the laboratory conditions there was calculated the drying coefficient depending on the drying time and air speed at constant temperature. The influence of the air speed was recognised as an important parameter, which can serve especially in the design and construction of the new equipment with the belts for housing of poultry or improvement of the use of the drying tunnel or in similar applications.