School of Environmental Science and Engineering, Zhejiang Gongshang University, No. 149, Jiaogong Road, Hangzhou 310012, China.
School of Environmental Science and Engineering, Zhejiang Gongshang University, No. 149, Jiaogong Road, Hangzhou 310012, China.
Sci Total Environ. 2020 Aug 20;731:139160. doi: 10.1016/j.scitotenv.2020.139160. Epub 2020 May 4.
Sulfate is generally found in natural water and wastewater. Nitrite-DAMO bacteria live in natural water or wastewater containing different sulfates. To determine the effect of sulfate on the nitrite-DAMO process, we conducted batch tests and continuous tests to investigate the performance and microbial structure of the nitrite-DAMO system at different sulfate concentrations. The results indicated that the nitrogen removal performance of the nitrite-DAMO system was initially promoted and then inhibited at 0-200 mg SO/L, and the denitrification rate was highest at 80 mg SO/L which was 1.26 mgN/(L·d). When stimulated by sulfate, protein stabilized nitrite-DAMO bacteria. The denitrification kinetics conformed to the Edward equation, and the initial inhibitory concentration of the nitrite-DAMO system was 189.70 mg SO/L. Changes in the proportion of unclassfied_c_ABY1 of the phylum Patescibacteria and norank_f_LD-RB-34 of the phylum Bacteroidetes were the main factors influencing how the nitrogen removal rate of the nitrite-DAMO system responded to sulfate.
硫酸盐通常存在于天然水和废水中。亚硝酸盐 - DAMO 细菌存在于含有不同硫酸盐的天然水或废水中。为了确定硫酸盐对亚硝酸盐 - DAMO 工艺的影响，我们进行了批量试验和连续试验，以研究不同硫酸盐浓度下亚硝酸盐 - DAMO 系统的性能和微生物结构。结果表明，在 0-200mg SO/L 范围内，亚硝酸盐 - DAMO 系统的脱氮性能最初得到促进，然后受到抑制，在 80mg SO/L 时脱氮速率最高，为 1.26mgN/（L·d）。硫酸盐刺激时，蛋白质稳定了亚硝酸盐 - DAMO 细菌。反硝化动力学符合爱德华方程，亚硝酸盐 - DAMO 系统的初始抑制浓度为 189.70mg SO/L。门 Patescibacteria 的未分类_c_ABY1 和门 Bacteroidetes 的 norank_f_LD-RB-34 的比例变化是影响亚硝酸盐 - DAMO 系统对硫酸盐脱氮率响应的主要因素。
