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Biokinetics of microbial consortia using biogenic sulfur as a novel electron donor for sustainable denitrification
- Kostrytsia, Anastasiia, Papirio, Stefano, Morrison, Liam, Ijaz, Umer Zeeshan, Collins, Gavin, Lens, Piet N.L., Esposito, Giovanni
- Bioresource technology 2018 v.270 pp. 359-367
- Thermomonas, Thiobacillus, biomass, byproducts, denitrification, desulfurization, nitrate nitrogen, nitrites, nitrogen, nitrogen dioxide, pollution, sulfur, surface area, wastewater
- 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 a median size of 4.69 µm and a specific surface area of 3.38 m2/g, which made S0 particularly reactive and bioavailable. During denitritation, the biomass enriched on nitrite (NO2–) was capable of degrading up to 240 mg/l NO2–-N with a denitritation activity of 339.5 mg NO2–-N/g VSS·d. The use of biogenic S0 induced a low NO2–-N accumulation, hindering the NO2–-N negative impact on the denitrifying consortia and resulting in a specific denitrification activity of 223.0 mg NO3–-N/g VSS·d. Besides Thiobacillus being the most abundant genus, Moheibacter and Thermomonas were predominantly selected for denitrification and denitritation, respectively.