MONITORING OF LOW-TEMPERATURE VACUUM DRYING OF HIGH-MOISTURE ORGANIC-SUBSTANCES - MASS-SPECTROMETRIC DETERMINATION OF THE COMPOSITION OF VAPORS AND GASES EVOLVED IN DRYING OF POULTRY MANURE

The results of mass-spectrometric determination of the composition of vapors and gases evolved in the low-temperature vacuum drying of pouf try manure are presented. It is found that the main components are wat er vapor, nitrogen, oxygen, methane, propane, carbon dioxide, and carb on monoxide. Their partial pressures are measured at different tempera tures of the substance studied. The dynamics of the drying process are examined. It is found that low-temperature vacuum drying is essential ly an environmentally appropriate nonwaste technology for the treatmen t of high-moisture organic materials, including poultry manure and sim ilar substances, which evolve no high-molecular (particularly, sulfur- containing) compounds on heating to 130 degrees C.