BIOLOGICAL DECOMPOSITION OF CYANIDE IN SEWAGE-SLUDGE

The potential of sewage sludge for decomposition of cyanide has been i nvestigated at different temperatures, ratio sewage sludge to cyanide, pH and also at prolonged and at four cycle repeated processes. Along with the kinetics of cyanide decomposition, the consumption of reagent s necessary to maintain pH of the biosystem and the releasing of volat ile cyanide have been examined. The positive effect of the activation of sewage sludge by means of aeration and its correlation to the kinet ics of the bacterial growth have been also studied. Along with aeratio n, ''carrier biology'' has been employed to improve the characteristic s of sewage sludge, using wood peels as a carrier material