Nielsen Asbjørn Haaning, Vollertsen Jes, Hvitved-Jacobsen Thorkild
Department of Life Sciences, Aalborg University, Denmark.
Water Environ Res. 2006 Mar;78(3):275-83. doi: 10.2175/106143005x94367.
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 degrees 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 (H2S) to hydrogen sulfide ion (HS(-)), with HS(-) being more readily oxidized than H2S. 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.
研究了污水管网废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，分别研究了温度在10至20摄氏度和pH值在5至9范围内的影响。使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值对化学硫化物氧化速率的影响与硫化氢（H2S）离解为硫化氢离子（HS(-)）有关，HS(-)比H2S更容易被氧化。生物硫化物氧化在废水的环境pH值下表现出最高的速率，并且在低pH值和高pH值下反应均受到抑制。发现化学硫化物氧化产生硫代硫酸盐和硫酸盐，而元素硫是生物硫化物氧化的主要产物。基于这些研究，确定了一般速率方程和化学计量常数，从而能够将这些过程纳入概念性的下水道过程模型中。
