METHOD AND APPARATUS FOR PREPARING FERTILIZER FROM ORGANIC WASTES Russian patent published in 1997 - IPC

FIELD: utilization of wastes. SUBSTANCE: mixture of chicken droppings with moisture-absorbing material is irradiated with superhigh-frequency emission and charged at 70-80 C into a reactor where the mixture is subjected to blowing through with oxygen- containing gas in upward and transverse directions with continuous removal of worked out gas. The mixture is further kept at 70-80 C for 60-70 h and discharged as final product, which is dried to 20- 25% of moisture. Method is carried out in apparatus 1 consisting of accumulator 2, rotor conveyer 6, superhigh-frequency emitter 7, reactor 8 with windows for charging raw material 4 and discharging final product 5. Reactor 8 is provided with system 13 for blowing through oxygen-containing gas, system for removing worked out gas from reactor, and dryer 20 for afterdrying of final product. EFFECT: enhanced efficiency of process. 3 cl, 2 tbl