Rapid and accurate determination of VFAs and ethanol in the effluent of an anaerobic H(2)-producing bioreactor using near-infrared spectroscopy.
A rapid quantification method, based on Fourier transform near-infrared (FT-NIR) spectroscopy, was developed and validated to nondestructively quantify the concentrations of volatile fatty acids and ethanol in the effluent of an anaerobic H(2)-producing bioreactor. The first-derivative spectra calculated by a simple numerical difference, combined with the orthogonal signal correction method, were used as spectral preprocessing options. A calibration model was established and validated using gas chromatography measurement results. The number of internal latent variables was optimized based on the lowest root-mean-square error of calibration. The calibration model established shows the satisfactory results for the lowest root-mean-square errors of prediction compared to other preprocess methods. The method developed in this work is demonstrated to be more flexible compared with other approaches to determine the concentrations of volatile fatty acids and ethanol in the anaerobic reactor effluents.
Zhang
Meng-Lin
ML
Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China.
Sheng
Guo-Ping
GP
Mu
Yang
Y
Li
Wei-Hua
WH
Yu
Han-Qing
HQ
Harada
Hideki
H
Li
Yu-You
YY
D000693:Anaerobiosis; D019149:Bioreactors; D002138:Calibration; D002849:Chromatography, Gas; D000431:Ethanol / Q000032:analysis*; D005227:Fatty Acids / Q000032:analysis*; D017550:Spectroscopy, Fourier Transform Infrared; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis*
D005227:Fatty Acids; D055549:Volatile Organic Compounds; D000431:Ethanol