TY - JOUR
T1 - Near Infrared and acoustic chemometrics monitoring of volative fatty acids and dry matter during co-digestion of manure and maize silage
AU - Juhl Lomborg, Carina
AU - Holm-Nielsen, Jens Bo
AU - Oleskowicz-Popiel, Piotr
AU - Esbensen, Kim
PY - 2009
Y1 - 2009
N2 - In this study, two process analytical technologies, near infrared spectroscopy and acoustic chemometrics,were investigated as means of monitoring a maize silage spiked biogas process. A reactor recirculationloop which enables sampling concomitant with on-line near infrared characterisation was applied. Nearinfrared models resulted in multivariate models for total and volatile solids with ratio of standard error ofperformance to standard deviation (RPD) values of 5 and 5.1, indicating good on-line monitoring prospects.The volatile fatty acid models had slopes between 0.83 and 0.92 (good accuracy) and RPD between2.8 and 3.6 (acceptable precision). A second experiment employed at-line monitoring with both nearinfrared spectroscopy and acoustic chemometrics. A larger calibration span was obtained for total solidsby spiking. Both process analytical modalities were validated with respect to the total solids prediction.The near infrared model had an RPD equal to 5.7, while the acoustic chemometrics model resulted in aRPD of 2.6.
AB - In this study, two process analytical technologies, near infrared spectroscopy and acoustic chemometrics,were investigated as means of monitoring a maize silage spiked biogas process. A reactor recirculationloop which enables sampling concomitant with on-line near infrared characterisation was applied. Nearinfrared models resulted in multivariate models for total and volatile solids with ratio of standard error ofperformance to standard deviation (RPD) values of 5 and 5.1, indicating good on-line monitoring prospects.The volatile fatty acid models had slopes between 0.83 and 0.92 (good accuracy) and RPD between2.8 and 3.6 (acceptable precision). A second experiment employed at-line monitoring with both nearinfrared spectroscopy and acoustic chemometrics. A larger calibration span was obtained for total solidsby spiking. Both process analytical modalities were validated with respect to the total solids prediction.The near infrared model had an RPD equal to 5.7, while the acoustic chemometrics model resulted in aRPD of 2.6.
KW - Nær infrarød spektroskopi
KW - akustisk kemometi
KW - co-fermentering
KW - Majs ensilage
KW - Biogas
KW - Near Infrared Spectroscopy
KW - Acoustic chemometrics
KW - Co-digestion
KW - Maize silage
KW - Biogas
U2 - 10.1016/j.biortech.2008.09.043
DO - 10.1016/j.biortech.2008.09.043
M3 - Journal article
SN - 0960-8524
VL - 100
SP - 1711
EP - 1719
JO - Bioresource Technology
JF - Bioresource Technology
IS - 5
ER -