METHOD TO PRODUCE POWDERED FERMENT PREPARATIONS Russian patent published in 2013 - IPC C12N9/00 C12M1/02 

FIELD: biotechnologies.

SUBSTANCE: depth cultivation of microorganisms is carried out in two fermenters with heating jackets. Cultivation is carried out under continuous aeration with sterile air and mechanical mixing at temperature of 30…32°C in the entire volume of fermenters. Cultural fluid produced in two fermenters under pressure is alternately supplied for filtering in two parallel filters with counterflow water regeneration of a filtering element. Filters alternately operate in the mode of separation with residue removal and regeneration. The cultural fluid filtrate with moisture of 92…95% is sent into a spray dryer. The filtrate in the drying chamber contacts with the drying agent - hot air with temperature of 70…75°C. The powder of the ferment preparation is produced with moisture of 5…7%. Heating of air supplied into the spray dryer is carried out using a steam compression heat pump, comprising a compressor, a condenser, a heat control valve and an evaporator, which operate in the closed thermodynamic cycle. One part of heated air is sent into the spray dryer in the condenser of the heat pump. The other part of air is used as coolant for heating of water to temperature of 40…45°C. Water is then supplied into heating jackets of fermenters. The spent drying agent with temperature of 30…35°C and moisture content of 0.025…0.030 kg/kg is cooled in the evaporator to the temperature of 5…7°C and moisture content of 0.003…0.005 kg/kg. The drying agent with the spent coolant is again supplied into the condenser. The condensate produced in the evaporator is removed into the condensate collector with subsequent supply into the filter under pressure.

EFFECT: production of a powdered target product with homogeneous particle size, increased energy efficiency.

1 dwg, 2 ex