Performance and mechanism of anaerobic biotrickling filter for removal of sulfite, sulfate, and hydrosulfite

Abstract

The difference in desulfurization performance of the BTF was minor when sodium lactate and sodium acetate were used as carbon sources. Acetate was more superior when taking both the carbon/sulfur ratio (C/S) and RE into account. The total dissolved sulfide yield was over 70% with sodium acetate as the carbon source, which was 15-20% higher than that with sodium lactate.Sodium lactate was not completely degraded and acetic acid was produced. All oxidation-reduction potential values were lower than À370 mV, indicating a perfect anaerobic condition in the BTF. The BTF could efficiently treat sulfite, sulfate, and hydrosulfite and could replace the regeneration stage of the dual-alkali process.