PROCESSING OF POULTRY LITTER

摘要

A process for converting raw poultry litter to an essentially odor-free product of increased digestibility to ruminant animals includes the steps of reacting the raw litter with acid at a pH of no greater than about 2.5 to thereby stabilize the volatile or potentially volatile nitrogen compounds in the litter and thereafter reacting the acidified litter with ammonia to raise the pH thereof to no greater than about 5.5 to enhance the crude protein content and at some point in the process raising the temperature of the litter to at least 160.degree.F to reduce pathogens to safe levels. The acidification and ammoniation steps can be carried out in a rotating drum in which the treatments are carried out on the poultry litter in a free-flowing condition. Heat generated during the ammoniation step can be used to drive off water vapor.