Prediction of biogas potentials using quick laboratory analyses: upgrading previous models for application to heterogeneous organic matrices.
This study presents an upgrading of the mathematical models to predict anaerobic biogasification potential (ABP) through quick laboratory analyses that have been presented in an earlier study. The aim is to widen the applicability of the models to heterogeneous organic substrates and to improve their reliability through a deeper statistical approach. Three multiple-step linear regressions were obtained using biomass oxygen demand in 20 h (OD(20)) plus the volatile solids content (VS) of 23 new samples of heterogeneous organic matrices, of 46 samples presented in the earlier work and of the data set comprising all the 69 samples. The two variables chosen were found to be suitable for very heterogeneous materials. To judge the prediction quality, a validation procedure was performed with 12 new samples using model efficiency indexes. The proposed model had good prediction ability for a large variety of organic substrates, and allows the calculation of the ABP value within only 2-day's laboratory work instead of the 60-90 days required to obtain ABP by anaerobic test.
Schievano
Andrea
A
Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
Scaglia
Barbara
B
D'Imporzano
Giuliana
G
Malagutti
Luca
L
Gozzi
Annalisa
A
Adani
Fabrizio
F
D000383:Agriculture / Q000379:methods; D000693:Anaerobiosis; D001674:Bioelectric Energy Sources; D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods; D005740:Gases; D007220:Industrial Waste; D010100:Oxygen / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods; D012044:Regression Analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification
D005740:Gases; D007220:Industrial Waste; D010100:Oxygen