Anoxic sulfide oxidation in wastewater of sewer networks.
Anoxic sulfide oxidation in wastewater of sewer networks.
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DOI：
10.2166/wst.2005.0076
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发表时间：
2005-08
期刊：
影响因子：
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通讯作者：
W. Yang;J. Vollertsen;T. Hvitved‐Jacobsen
中科院分区：
文献类型：
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作者：
W. Yang;J. Vollertsen;T. Hvitved‐Jacobsen
介绍了污水在下水道条件下的缺氧硫化物氧化研究。设计并进行了批量试验，以研究硝酸盐在水相中的化学和生物硫化物氧化。在pH 7.0和8.5下平行氧化，厌氧贮存期分别为0、3、4、6 d。初始硫化物浓度在0-4.1 g S m（-3）的水平上，通过添加或硫酸盐还原施加。结果表明，污水在缺氧条件下可发生生物硫化物氧化，但不能发生化学硫化物氧化。单质硫是实验的最终产物。亚硝酸盐作为中间体在废水中积累。新鲜废水在pH 7.0时的缺氧氧化速率为0.48 g S m(-3) h(-1)，在pH 8.5时为0.62 g S m(-3) h(-1)，不到潜在好氧氧化速率的30%。发现废水的长期厌氧适应可以抑制氧化过程。
Investigations on anoxic sulfide oxidation in wastewater under sewer conditions are presented. Batch tests were designed and conducted to study both chemical and biological sulfide oxidation by nitrate in the water phase. Oxidation at pH 7.0 and 8.5 was performed in parallel and wastewater with anaerobic storage period of 0, 3, 4, 6 days was used. Initial sulfide concentrations at a level of 0-4.1 g S m(-3) were applied by either addition or sulfate reduction. Results showed that wastewater in sewers was capable of biological, but not chemical, sulfide oxidation under anoxic conditions. Elemental sulfur was the end-product during the experiment. Nitrite accumulates in wastewater as an intermediate. The anoxic oxidation rates for fresh wastewater was 0.48 g S m(-3) h(-1) at pH 7.0 and 0.62 g S m(-3) h(-1) at pH 8.5, which accounted for less than 30% of the potential aerobic oxidation rates. A long-term anaerobic adaptation of the wastewater was found to inhibit the oxidation process.