BIOMETHANATION OF A MIXTURE OF SALTY CHEESE WHEY AND POULTRY WASTE ORCATTLE DUNG - A STUDY OF EFFECT OF TEMPERATURE AND RETENTION TIME

This paper describes the results of a study aimed at improving the eff iciency of anaerobic digestion of salty cheese whey in combination wit h poultry waste or cattle dung. Best results were obtained when salty cheese whey was mixed with poultry waste in the ratio of 7:3, or cattl e dung in the ratio of 1:1, both on dry weight basis giving maximum ga s production of 1.2 L/L of digester/d with enriched methane content of 64% and 1.3 L/L of digester/d having methane content of 63% respectiv ely. Various conditions such as temperature and retention time have be en optimized for maximum process performance.