Fast characterization of solid organic waste content with near infrared spectroscopy in anaerobic digestion.
The development of anaerobic digestion involves both co-digestion of solid wastes and optimization of the feeding recipe. Within this context, substrate characterisation is an essential issue. Although it is widely used, the biochemical methane potential is not sufficient to optimize the operation of anaerobic digestion plants. Indeed the biochemical composition in carbohydrates, lipids, proteins and the chemical oxygen demand of the inputs are key parameters for the optimisation of process performances. Here we used near infrared spectroscopy as a robust and less-time consuming tool to predict the solid waste content in carbohydrates, lipids and nitrogen, and the chemical oxygen demand. We built a Partial Least Square regression model with 295 samples and validated it with an independent set of 46 samples across a wide range of solid wastes found in anaerobic digestion units. The standard errors of cross-validation were 90mgO2⋅gTS-1carbohydrates, 2.5∗10-2g⋅gTS-1lipids, 7.2∗10-3g⋅gTS-1nitrogen and 99mgO2⋅gTS-1chemical oxygen demand. The standard errors of prediction were 53mgO2⋅gTS-1carbohydrates, 3.2∗10-2g⋅gTS-1lipids, 8.6∗10-3g⋅gTS-1nitrogen and 83mgO2⋅gTS-1chemical oxygen demand. These results show that near infrared spectroscopy is a new fast and cost-efficient way to characterize solid wastes content and improve their anaerobic digestion monitoring.
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, 102 Av. des Etangs, Narbonne F-11100, France; BioEnTech, 74 Av. Paul Sabatier, 11100 Narbonne, France. Electronic address: cyrille.charnier@supagro.inra.fr.
Cyrille
C
Charnier
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, 102 Av. des Etangs, Narbonne F-11100, France. Electronic address: eric.latrille@supagro.inra.fr.
Eric
E
Latrille
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, 102 Av. des Etangs, Narbonne F-11100, France. Electronic address: julie.jimenez@supagro.inra.fr.
Julie
J
Jimenez
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, 102 Av. des Etangs, Narbonne F-11100, France. Electronic address: margaux.lemoine@supagro.inra.fr.
Margaux
M
Lemoine
INRA, UMR1083 Sciences pour l'œnologie, 2 Place Viala, F-34060 Montpellier, France. Electronic address: bouletjc@supagro.inra.fr.
Jean-Claude
JC
Boulet
BioEnTech, 74 Av. Paul Sabatier, 11100 Narbonne, France. Electronic address: jeremie.miroux@bioentech.eu.
Jérémie
J
Miroux
INRA, UR0050, Laboratoire de Biotechnologie de l'Environnement, 102 Av. des Etangs, Narbonne F-11100, France. Electronic address: jean-philippe.steyer@supagro.inra.fr.
Jean-Philippe
JP
Steyer
D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002241:Carbohydrates / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis; D008055:Lipids / Q000737:chemistry; D008697:Methane / Q000378:metabolism*; D015233:Models, Statistical; D009584:Nitrogen; D011506:Proteins / Q000737:chemistry; D012016:Reference Values; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000737:chemistry*; D062611:Solid Waste / Q000032:analysis*; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D013464:Sulfuric Acids / Q000737:chemistry
D002241:Carbohydrates; D008055:Lipids; D011506:Proteins; D012722:Sewage; D062611:Solid Waste; D013464:Sulfuric Acids; D005947:Glucose; D009584:Nitrogen; C033158:sulfuric acid; D008697:Methane
Anaerobic digestion; Biochemical composition; Chemical oxygen demand; Near infrared spectroscopy; Solid wastes