Effect of process conditions on the performance of a dual-reactor biodesulfurization process

The biotechnological gas desulfurization process under haloalkaline conditions is widely applied for removal of toxic H2S from sour streams. In this biologically oxidized into elemental sulfur. Recently, the has been extended with an anaerobic step (dual-reactor line-up), increasing selectivity sulfur (S8) ~85–97% and decreasing formation (thio)sulfate. It was also found that biological sulfide uptake took place in bioreactor. order to apply industry, more insight needed effect on performance. HRT concentration bioreactor pH overall product selectivities were investigated. 7 experiments performed a pilot-scale biodesulfurization set-up. all experiments, high (>95%) S8 obtained, except when aerated increased 8.5 9.1 (selectivity 88%). Furthermore, at higher concentrations pH. We hypothesize related polysulfide formation. Our results increase understanding how control conversion dual-reactor process.