Portal de Periódicos da CAPES

Influence of the ultrasound pretreatment on anaerobic digestion of cattle manure, food waste and crude glycerine

2016; Taylor & Francis; Volume: 38; Issue: 6 Linguagem: Inglês

10.1080/09593330.2016.1208278

1479-487X

P. Ormaechea, L. Castrillón, E. Marañón, Y. Fernández-Nava, L. Negral, Laura Megido,

Water-Energy-Food Nexus Studies

To increase the production of methane, when cattle manure (CM) is digested, pretreatments can be applied and/or the manure can be co-digested with other wastes. In this research work, a mixture of CM, food waste (FW) and raw glycerine (Gly) in a proportion in weight of 87% CM, 10% FW and 3% Gly was digested, (a) without pretreatment and (b) with pretreatment by ultrasound, applying a sonication energy of 1040 kJ/kg total solids. Specific methane production was 290 L CH4/kg volatile solids (VS) without pretreatment and 520 L CH4/kg VS with pretreatment. With respect to the volumetric methane production, 1.07 L CH4/Lreactor.day was produced in the first case, and in the second case, 1.98 L CH4/Lreactor.day. We can conclude that the application of ultrasound pretreatment significantly improved the production of biogas.