Rapid and accurate determination of VFAs and ethanol in the effluent of an anaerobic H2-producing bioreactor using near-infrared spectroscopy

Meng Lin Zhang, Guo Ping Sheng, Yang Mu, Wei Hua Li, Han Qing Yu, Hideki Harada, Yu You Li

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

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 H2-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.

Original languageEnglish
Pages (from-to)1823-1830
Number of pages8
JournalWater Research
Volume43
Issue number7
DOIs
Publication statusPublished - 2009 Apr

Keywords

  • Anaerobic fermentation
  • Bioreactor
  • Ethanol
  • FT-NIR spectroscopy
  • H production
  • Multivariate analysis
  • Volatile fatty acid (VFA)

ASJC Scopus subject areas

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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