Energy-environmental benefits and economic feasibility of anaerobic codigestion of Iberian pig slaughterhouse and tomato industry wastes in Extremadura (Spain)
2013
González-González, A. | Cuadros, F. | Ruiz-Celma, A. | López-Rodríguez, F.
Anaerobic digestion of Iberian pig slaughterhouse and tomato industry wastes, as well as codigestion operations from such residues, are reported to achieve 54–80% reduction in Chemical Oxygen Demand and 6–19Nm3/m3 substrate methane production. Furthermore, 0.79–0.88m3water/m3 substrate is seen to be recovered after the above mentioned operations, which might be used as irrigation water, and 0.12–0.21m3agricultural amendment/m3 substrate with 91–98% moisture content.The present paper also reports on the economic feasibility of both an anaerobic codigestion plant operating with 60% slaughterhouse wastes/40% tomato industry wastes (optimal ratio obtained in previous laboratory-scaled experiments), and an anaerobic digestion plant for Iberian pig slaughterhouse waste. Payback times are reported as 14.86 and 3.73years, respectively.
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