Effects of sepiolite addition on removing contaminants in anaerobic reactor for treatment landfill leachate

摘要

The effects of adding sepiolite in the performance of an anaerobic reactor for treating landfill leachate were investigated. Responses of SMP and EPS of the Rl (without sepiolite) and R2 (with sepiolite) reactors were evaluated by EEM and FTIR spectra. Results showed that addition of sepiolite increased the removal of COD removal by 10%. The highest removal rate of ammonia nitrogen was also observed reaching 69.8% in R2 reactor. In the EEM spectra, humic-and fulvic acid-like substances were present in the EPS of the Rl reactor. The peak was located at the excitation/emission wavelength (Ex/Em) of 280/350 nm in the R2 reactor, attributed to tryptophan-like proteins. Meanwhile, dehydrogenase activities were higher than in the Rl reactor, similar with observations on COD removal rate.