School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; National and Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and 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 for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
Bioresour Technol. 2022 Jun;354:127194. doi: 10.1016/j.biortech.2022.127194. Epub 2022 Apr 20.
In this study, two short-cut sulfur autotrophic denitrification (SSADN) reactors were initiated using different reduced sulfur forms as electron donors and their effects on the start-up speed of the SSADN process, NO-N accumulation characteristics, and microbial community were investigated. Results revealed that during the same period, due to the relatively slow S dissolution rate, the NO-N production rate realized by microorganisms in S-SSADN (NO-N production rate (NPR), 174 mg/(L·d)) was significantly slower than S-SSADN (NPR, 679 mg/(L·d)). The NO-N accumulation efficiency (NAE) was maintained > 80%, which was significantly higher than S-SSADN. In the SSADN system using different reduced sulfur forms, the microbial community structure and abundance considerably differed. The main sulfur-oxidizing bacteria (SOB) in S-SSADN were Sulfurimonas (6.5%) and Thiobacillus (5.3%). The main SOB species in S-SSADN was Thiomonas (13.6%). Thermomonas played an important role in the two reactors as an important NO-N denitrifying bacteria species.
在这项研究中，使用两种不同的还原态硫作为电子供体启动了两个短程硫自养反硝化（SSADN）反应器，并研究了它们对 SSADN 工艺启动速度、NO-N 积累特性和微生物群落的影响。结果表明，在同一时期，由于 S 溶解速率相对较慢，S-SSADN 中微生物实现的 NO-N 生成速率（NPR，174 mg/（L·d））明显慢于 S-SSADN（NPR，679 mg/（L·d））。NO-N 积累效率（NAE）保持在>80%，明显高于 S-SSADN。在使用不同还原态硫的 SSADN 系统中，微生物群落结构和丰度有很大差异。S-SSADN 中的主要硫氧化菌（SOB）为 Sulfurimonas（6.5%）和 Thiobacillus（5.3%）。S-SSADN 中的主要 SOB 是 Thiomonas（13.6%）。Thermomonas 在两个反应器中作为一种重要的 NO-N 反硝化细菌发挥了重要作用。
