METHOD OF FERMENTATION WITH REDUCED CONTENT OF CADMIUM IN FORMED BIOMASS

摘要

Reduction of cadmium biosorption into microorganisms by continuousor semi-continuous fermentation. The essence is an allowancean alkali metal sulfide to the fermented mediumthe pH of which is adjusted with ammonia to not 4.5 orhigher. The sulfide is added in 150 to 200-fold molarexcess due to stoichiometry, which will cause precipitationcadmium to insoluble cadmium sulphide and thereby preventcell biosorption.