The study dealed with the effectiveness of lime, chlorinated lime, formalin and superphosphate compound applied to cattle and sheep wastes com bined with bedding and to poultry litter experimentally contaminated with Salmonella typhimurium, E.coli, corynbacterium pyogenes and Staphylo coccus aureus. Moreover, the study investigate the effect of disinfectants used on the behnviour of some nitrogen compounds in the feedlot wastes and poultry litter.
Experimental results revealed that the bacteriocidal effectiveness of disinfectants used ranked in increasing order of expposure time as: Quick lime, saked lime, formalin, beleaching and superphosphate. Evaluation of wastes after disinfection revealed that lime and chlorinated lime dec reased the contents of several nitrogen forms in animal and poultry
wastes as well as increased its alkalinity which decreased its value for utilization on to lands and can be a problem in some crops. In contrast, formalin 4% as well as superphosphate increases in nitrogen contents of the wastes and pH ranged from neutral to acidic respectively and therefore such management could be more suitable to Egyptian soils.