New insight into chemical changes of dissolved organic matter during anaerobic digestion of dewatered sewage sludge using EEM-PARAFAC and two-dimensional FTIR correlation spectroscopy

- DOM chemical change was studied by EEM-PARAFAC and 2D FTIR correlation spectroscopy.
- The intensities of fluorescent groups in DOM increased over time in biogas reactor.
- 2D FTIR correlation spectroscopy revealed the degradation order of individual DOMs.
- DOM degradation mechanism in high-solid anaerobic digestion is further understood.