Full-scale biodrying process of municipal solid waste

The paper presents the results obtained in the full-scale waste biodrying reactor. The studied facility includes in the biological stage a rectangular-shaped, galvanized steel reactor equipped with a module for active aeration connected with a stove and a bio-filter for removing odours. The undersize fraction ((empty set)<80 mm) of the municipal solid waste (MSW) that undergoes mechanical pretreatment is treated by 14th days in the 150 m(3) capasity reactor. Initial moisture content of the untreated waste was 54.65%. Moisture content was declined gradually during biodrying process. Temperature changes during 14th days of biodrying process were monitored with the maximum temperature 70 degrees C. To assess the degree of stabilization of the biodried waste, the determination of the O-2 uptake was measured. The oxygen demand of untreated waste was 53.16 mg O-2/g d.m. and after 14th days for biodried waste oxygen consumption was 19.78 mg O-2/g d.m. The results obtained in studies by respirometric dynamic method of oxygen uptake (expressed as O-2/96h parameter) had been compared to the results performed using the static method, where AT(4) is the applied indicator.