Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043 Cassino (FR), Italy.
Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy.
Bioresour Technol. 2018 Dec;270:359-367. doi: 10.1016/j.biortech.2018.09.044. Epub 2018 Sep 11.
In this study, the biokinetics of autotrophic denitrification with biogenic S (ADBIOS) for the treatment of nitrogen pollution in wastewaters were investigated. The used biogenic S, 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 m/g, which made S particularly reactive and bioavailable. During denitritation, the biomass enriched on nitrite (NO) was capable of degrading up to 240 mg/l NO-N with a denitritation activity of 339.5 mg NO-N/g VSS·d. The use of biogenic S induced a low NO-N accumulation, hindering the NO-N negative impact on the denitrifying consortia and resulting in a specific denitrification activity of 223.0 mg NO-N/g VSS·d. Besides Thiobacillus being the most abundant genus, Moheibacter and Thermomonas were predominantly selected for denitrification and denitritation, respectively.
本研究考察了用于处理废水中氮污染的生物自养反硝化与生物成因硫（ADBIOS）的生物动力学。所使用的生物成因硫是一种气体脱硫的副产物，为元素微晶正交硫，平均粒径为 4.69μm，比表面积为 3.38m/g，这使得硫具有特别高的反应性和生物可利用性。在反硝化过程中，在亚硝酸盐（NO）上富集的生物量能够以 339.5mgNO-N/gVSS·d 的反硝化活性降解高达 240mg/l 的 NO-N。生物成因硫的使用诱导了低的 NO-N 积累，从而阻碍了 NO-N 对反硝化菌群的负面影响，并导致 223.0mgNO-N/gVSS·d 的特定反硝化活性。除了硫杆菌是最丰富的属之外，莫海威杆菌和 Thermomonas 分别主要被选择用于反硝化和反硝化作 用。
