Kinetics and Stoichiometry of Aerobic Sulfide Oxidation in Wastewater from Sewers—Effects of pH and Temperature
Kinetics and Stoichiometry of Aerobic Sulfide Oxidation in Wastewater from Sewers—Effects of pH and Temperature
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DOI：
10.2175/106143005x94367
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发表时间：
2006-03
影响因子：
3.1
通讯作者：
A. Nielsen;J. Vollertsen;T. Hvitved‐Jacobsen
中科院分区：
文献类型：
--
作者：
A. Nielsen;J. Vollertsen;T. Hvitved‐Jacobsen
研究了污水中好氧化学和生物硫化物氧化的动力学和化学计量学。在这方面，研究了温度和pH值分别在10 ~ 20°C和5 ~ 9°C范围内的影响。用阿伦尼乌斯关系描述了硫化物氧化动力学的温度依赖性。pH对化学硫化物氧化速率的影响与硫化氢（h2s）解离成硫化氢离子（HS -）有关，其中HS -比h2s更容易被氧化。生物硫化物氧化在环境废水pH值下表现出最高的速率，并且在低和高pH值下反应都受到抑制。化学硫化氧化生成硫代硫酸盐和硫酸盐，而生物硫化氧化主要生成单质硫。在此基础上，确定了一般速率方程和化学计量常数，使这些过程能够纳入概念下水道过程模型。
Kinetics and stoichiometry of aerobic chemical and biological sulfide oxidation in wastewater from sewer networks were studied. In this respect, the effects of temperature and pH were investigated in the ranges 10 to 20°C and 5 to 9, respectively. The temperature dependency of sulfide oxidation kinetics was described using an Arrhenius relationship. The effect of pH on the rate of chemical sulfide oxidation is related to the dissociation of hydrogen sulfide (H 2S) to hydrogen sulfide ion (HS −), with HS − being more readily oxidized than H 2S. Biological sulfide oxidation exhibited the highest rates at ambient wastewater pH, and the reaction was inhibited at both low and high pH values. Chemical sulfide oxidation was found to produce thiosulfate and sulfate, while elemental sulfur was the main product of biological sulfide oxidation. Based on the investigations, general rate equations and stoichiometric constants were determined, enabling the processes to be incorporated to conceptual sewer process models.