Near Infrared Spectroscopy Calibrations for the Estimation of Process Parameters of Anaerobic Digestion of Energy Crops and Livestock Residues

2011 ◽  
Vol 19 (6) ◽  
pp. 479-493 ◽  
Author(s):  
Lutz Christian Krapf ◽  
Andreas Gronauer ◽  
Urs Schmidhalter ◽  
Hauke Heuwinkel
Keyword(s):  
Infrared Spectroscopy ◽  
Anaerobic Digestion ◽  
Near Infrared Spectroscopy ◽  
Process Parameters ◽  
Near Infrared ◽  
Energy Crops

Use of near infrared spectroscopy in monitoring of volatile fatty acids in anaerobic digestion

2009 ◽  
Vol 60 (2) ◽  
pp. 339-346 ◽  
Author(s):  
H. Fabian Jacobi ◽  
Christian R. Moschner ◽  
Eberhard Hartung
Keyword(s):  
Fatty Acids ◽  
Acetic Acid ◽  
Infrared Spectroscopy ◽  
Anaerobic Digestion ◽  
Propionic Acid ◽  
Near Infrared Spectroscopy ◽  
Volatile Fatty Acids ◽  
Near Infrared ◽  
Biogas Production ◽  
Biogas Plants

Recently biogas production from agricultural sources has rapidly developed. Therefore the demands on biogas plants to optimise the efficiency of the anaerobic digestion (AD) process have grown immensely. At present there is no online-supervision tool available to monitor the AD process, but costly and time-consuming chemical analyses are necessary. The possibility to use near-infrared spectroscopy (NIRS) in order to track relevant process parameters like total volatile fatty acids (VFA), acetic acid and propionic acid was investigated in the present research project. A NIR-sensor was integrated into a full-scale 1 MW biogas plant and NIR-spectra of the fermenter contents were recorded semi-continuously for 500 days. Weekly samples were taken and analysed for the above mentioned parameters. Calibration models were calculated, capable of following these parameters: VFA (r2=0.94), acetic acid (r2=0.69), propionic acid (r2=0.89).

Quantitative Detection of Ethanol Solid-State Fermentation Process Parameters Based on Near Infrared Spectroscopy

2017 ◽  
Vol 54 (2) ◽  
pp. 023002
Author(s):  
张航 Zhang Hang ◽  
刘国海 Liu Guohai ◽  
江辉 Jiang Hui ◽  
梅从立 Mei Congli ◽  
黄永红 Huang Yonghong
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Near Infrared Spectroscopy ◽  
Process Parameters ◽  
Solid State Fermentation ◽  
Fermentation Process ◽  
Near Infrared ◽  
Quantitative Detection
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