Near-infrared spectroscopy-based quantification of substrate and aqueous products in wastewater anaerobic fermentation processes |
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Authors: | MengLin Zhang GuoPing Sheng HanQing Yu |
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Institution: | (1) Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China |
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Abstract: | In this study, a Fourier transform near-infrared (FT-NIR) technique was used for process monitoring of anaerobic fermentation.
Orthogonal signal correction (OSC) method was used as NIR spectral preprocessing options. Calibration models were established
and the validation of the method was performed with the sucrose, ethanol and volatile fatty acids (VFAs) contents determined
by the anthrone and gas chromatography methods, respectively. Spectral range and the number of internal latent variables were
optimized for the best correlation coefficient. Test set validation of sucrose resulted in excellent measurement of prediction
performance and the correlation coefficient of determination is 0.930. Similar prediction statistics for individual VFA and
total VFA contents were obtained. These results proved that the NIR spectroscopy technology is able to quantify the contents
of both volatile fatty acids and sucrose in wastewater anaerobic fermentation process.
Supported by the National Natural Science Foundatoin of China-Japan Science & Technology Agency Joint Project (Grant No. 20610002),
National Natural Science Foundatoin of China (Grant No. 50878203), CAS (Grant No. KSCX2-YW-G-001), and National Basic Research
Program of China (Grant No.2004CB719602) |
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Keywords: | near-infrared wastewater anaerobic fermentation OSC sucrose ethanol volatile fatty acids (VFAs) |
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