Co-Digestion of Poultry Litter

Co-digestion of cow and poultry manure will offset the effect of high concentration of ammonia in poultry litter but biogas yields are expected to be lower than predicted due to certain inhibitory effects. Infact, co-digestion of cow and poultry manure is among the most preferred options used worldwide as poultry litter is dissolved by water present in dairy manure reducing total solids contents and improving its rheological properties.

However it is necessary to determine the quantity and the maximum organic loading rate that poultry litter could be applied to a working digester treating dairy manure and straw without adversely affecting its performance. The high organic nitrogen and sulfur content of poultry litter poses a significant challenge to the gas clean up and emissions control equipment.

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