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The anoxic and anaerobic sulfur transformation pathways in a laboratory-scale sewer receiving nitrate were investigated. Four reactors in series were employed to imitate a rising main sewer. The nitrate-dosing strategy was effective in controlling sulfide, as confirmed by the long-term sulfide measurements. Anoxic sulfide oxidation occurred in two sequential steps, namely the oxidation of sulfide...
Most of the existing sulfide removal processes from wastewaters and waste gases require substantial amounts of energy inputs. Here we present an electrochemical method by means of a fuel cell that removes sulfide while producing energy. A lab scale fuel cell was operated at ambient temperature and neutral pH, which was capable of removing aqueous sulfide continuously for 2 months at a rate of 0.62±0...
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