METHOD OF OUTPUT AND PREPARING SAPROPEL FERTILIZER Russian patent published in 1995 - IPC

FIELD: fertilizers. SUBSTANCE: method involves sapropel recovery from the lake, stacking by layer, drying at periodic stirring and addition of filler to sapropel. Filler has mineral and/or organic additions. Layer stacking can be made on the filler, for example, peat, wood chips, wood saw-dust. Drying at stirring is carried out preferably up to humidity 40-65 wt. -% After drying and/or in the process of drying sapropel can be purified from the foreign matters followed by granulation or grinding of its. Sapropel can be milled immediately after drying at stirring. In the process of drying sapropel can be frozen through. After milling it can be dried additionally up to humidity 10-40 wt.-% After drying filler (for example, wood saw-dust, mineral fertilizers, slag, manure, wood bark) can be added to sapropel. Additional drying can be carried out by spraying or simultaneously at granulation. Mixture of sapropel with filler can be granulated, granules were dried in boiling layer. Mixture of sapropel with filler can be dried and granulated simultaneously. Mixture of sapropel with filler can be dried additionally up to humidity 10-45 wt.-% in boiling layer. Granulation of sapropel or its mixture with filler can be carried out by making round method or extruding through the netting. EFFECT: decreased cost, improved ecological and qualitative properties of product. 20 cl