在不同 COD/硫酸盐比下的集成同步脱硫反硝化（ISDD）工艺。
Integrated simultaneous desulfurization and denitrification (ISDD) process at various COD/sulfate ratios.
机构信息
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
出版信息
Bioresour Technol. 2014 Mar;155:161-9. doi: 10.1016/j.biortech.2013.12.067. Epub 2014 Jan 2.
The integrated simultaneous desulfurization and denitrification (ISDD) is a novel treatment process to handle sulfate and nitrate-laden wastewaters of high loadings. This study experimentally explored the effect of COD/SO4(2-) ratio on the performance of ISDD process, particularly considering the complex interactions between sulfate-reducing bacteria (SRB), heterotrophic denitrifiers (hNRB) and autotrophic denitrifiers (aNRB). There existed an optimal COD/SO4(2-) ratio (=1.5:1 in the present study) to reach 100% SO4(2-) and NO3(-) removals and 42.6% S(0) recovery. At COD/SO4(2-)=1.5:1, the functional strains could form granules with high retention in the ISDD reactor. The microbial community analysis identified the SRB, hNRB and aNRB in the studied system, whose shifts correlated well with the noted ISDD performance change at different COD/SO4(2-) ratio. Interactions between different groups of bacteria and the possible strategy to enhance the ISDD performance were discussed.
同步脱硫反硝化（ISDD）是一种新型的处理工艺，用于处理高负荷的含硫酸盐和硝酸盐废水。本研究通过实验探索了 COD/SO4(2-) 比对 ISDD 工艺性能的影响，特别考虑了硫酸盐还原菌（SRB）、异养反硝化菌（hNRB）和自养反硝化菌（aNRB）之间的复杂相互作用。存在一个最佳的 COD/SO4(2-) 比（本研究中为 1.5:1），可实现 100%的 SO4(2-)和 NO3(-)去除率以及 42.6%的 S(0)回收率。在 COD/SO4(2-)=1.5:1 时，功能菌可以形成具有高保留率的颗粒，在 ISDD 反应器中。微生物群落分析鉴定了研究系统中的 SRB、hNRB 和 aNRB，它们的变化与不同 COD/SO4(2-) 比下 noted ISDD 性能变化很好地相关。讨论了不同细菌群之间的相互作用以及提高 ISDD 性能的可能策略。
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