Co-digestão anaeróbia de diferentes tipos de dejetos com resíduos de incubatório

Abstract

The hacthery waste that have high lipids and proteins content, makes treatment in biologic sistems unfeasible alone, for this and for the necessity also to treat other wastes in the animal production, ofentimes, chooses co-digestion, that provide a better enviroment for microrganism, increasing its degradacion and also proction of gases. The objective was measure inclusion of hacthery waste in differents levels with co-digestion anaerobic of poultry manure, bovine manure, equine manure and ovine manure. Were used 36 biodigestors batch bench model to accommodate 12 treatments, were constituted 4 menure types (poultry, bovine, equine and ovine) in 3 waste hacthery inclusion levels (0, 10 and 20% on TS contente basis), with 3 replicates per treatment. The evaluated parameters were reducions of total and volatile solids (TS and VS), totals and specifics productions of biogas and methane. The reductions of ST showed a significant difference in the manures only with the inclusion of 20% hatchery waste, being 45.78 and 37.71% in co-digestion with poultry manure and ovine manure, respectively. The VS evaluation showed a difference betwen all inclusions, with empahasis on poultry manure with the inclusion of 20% of hatchery waste, which resulted in a greater reduction VS of 62.12%. For biogas production, the use of 20% hatchery waste increases production, with 248.03 and 285.84 L.kg -1 if TS and VS, respectively, and for methane as from 10% inclusion of hatchery waste, were 83.99 and 104.38 L.kg -1 of TS added to hatchery waste levels of 10 and 20%, respectively, 100.08 and 122.12 L.kg -1 of VS added at the levels of 10 and 20%, respectively.