School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China.
Bioresour Technol. 2018 Oct;266:211-219. doi: 10.1016/j.biortech.2018.06.062. Epub 2018 Jun 21.
The characteristics of reaction between S and NO-N or NO-N in the sulfur autotrophic denitrification (SADN) process were studied using S as an electron donor and NO-N and NO-N as electron acceptors. The effect of changes in pH and temperature on the processes of NO-N and NO-N reduction were also studied to identify the optimum control parameters for strengthening the preference of S on NO-N; thus, achieving the efficient accumulation of NO-N. The results showed that the affinity of S for NO-N was considerably higher than that for NO-N. The optimum pH values for the reductions of NO-N and NO-N were 7.0 and 8.5, respectively, and both optimum temperatures were 35 °C. By controlling different pH, the NO-N conversion efficiency reached 90%, at which time the accumulation of NO-N was more than 95%. Microbial community analysis showed that Thiobacillus, Sulfurimonas, and Thioahalobacter were the main genera in the S-SADN process.
采用 S 作为电子供体，以 NO-N 和 NO-N 作为电子受体，研究了 S 与 NO-N 或 NO-N-N 在硫自养反硝化（SADN）过程中的反应特性。还研究了 pH 值和温度变化对 NO-N 和 NO-N 还原过程的影响，以确定强化 S 对 NO-N 优先性的最佳控制参数，从而实现 NO-N 的高效积累。结果表明，S 对 NO-N 的亲和力明显高于对 NO-N-N 的亲和力。NO-N 和 NO-N-N 还原的最佳 pH 值分别为 7.0 和 8.5，最佳温度均为 35°C。通过控制不同的 pH 值，NO-N 的转化率达到 90%，此时 NO-N 的积累量超过 95%。微生物群落分析表明，硫杆菌属、硫单胞菌属和硫杆菌属是 S-SADN 过程中的主要属。
