School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, People's Republic of China.
Key Laboratory of Northwest Water Resources, Environment and Ecology, MOE, People's Republic of China.
Environ Technol. 2022 Jan;43(1):42-50. doi: 10.1080/09593330.2020.1774665. Epub 2020 Jun 17.
The purpose of this study is to clarify the mechanism of the coupled hydrion with biology polysulfide in the simultaneous denitrification and desulfurization process. The coupled hydrion with biology polysulfide, uncoupled hydrion with biology polysulfide and no polysulfide experiments were performed in wastewater with two kinds of sulfide loads (100 and 200 mg/L). When the concentration of thiosulfate was suitable, the free H concentration (74.2 and 91.0 mg/L) and the proportion of (85.4% and 59.7%) were both higher under the two kinds of sulfide loading conditions (100 and 200 mg/L), and coupled hydrion with biology polysulfide was realized (the production of elemental sulfur is as high as 33 and 101 mg/L). Further analysis shown that the way of coupled hydrion with biology polysulfide were both: . In addition, for the coupled hydrion with biology polysulfide, more nitrates could be utilized to produce elemental sulfur S, and the lower ratio of H/S and were observed (S = 100 mg/L: 2.3 and 0.9; S = 200 mg/L: 0.9 and 0.03), which could promote the growth of and increase the proportion of . This maybe one of the reasons why coupled hydrion with biology polysulfide could be achieved.
本研究旨在阐明生物多硫化物与氢离子在同步反硝化脱硫过程中的耦合机制。在两种硫化物负荷（100 和 200mg/L）条件下的废水中进行了生物多硫化物耦合氢离子、生物多硫化物非耦合氢离子和无多硫化物实验。当硫代硫酸盐浓度适宜时，两种硫化物负荷条件（100 和 200mg/L）下的游离 H 浓度（74.2 和 91.0mg/L）和（85.4%和59.7%）的比例均较高，实现了生物多硫化物耦合氢离子（单质硫的产量高达 33 和 101mg/L）。进一步分析表明，生物多硫化物耦合氢离子的方式均为： 。此外，对于生物多硫化物耦合氢离子，可利用更多的硝酸盐来生成单质硫 S，且观察到较低的 H/S 比值和 比值（S=100mg/L：2.3 和 0.9；S=200mg/L：0.9 和 0.03），这有利于 的生长，增加 的比例。这也许是实现生物多硫化物耦合氢离子的原因之一。
