SRA

In this study, the biokinetics of autotrophic denitrification with biogenic S0 (ADBIOS) for the treatment of nitrogen pollution in wastewaters were investigated. The used biogenic S0, a by-product of gas desulfurization, was an elemental microcrystalline orthorhombic sulfur (with the median size 4.69 µm, specific surface area 3.38 m2/g). A specific denitrification activity of 223.0 mg NO3--N/g VSS·d was achieved by the biogenic S0-oxidizing microbial consortium. During denitritation, the biomass enriched on nitrite (NO2-) was capable of degrading NO2--N at a rate of 73.0 mg NO2--N /l·d, which was 3 times higher than that achieved during denitrification. Moheibacter and Thermomonas were predominantly selected for denitrification and denitritation, respectively. The impact of this study for the design and scale-up of an integrated nitrogen treatment with biogenic S0 recovery/reuse is discussed.