SBR处理硫化物废水过程中ORP与pH的变化规律

Variations of the Oxidation-Reduction Potential and pH Value During the Treatment of Wastewater Containg Sulfide by SBR

以模拟硫化物废水为研究对象,通过不同进水硫化物浓度和条件因素的试验,详细研究了SBR法在处理硫化物废水的过程中ORP、pH值的变化规律。结果表明,硫氧化过程中,ORP出现两个拐点,单质硫高积累区域在ORP曲线上这两个拐点之间的平台区域,这两个特征点基本上不受进水浓度、温度和曝气量的影响;pH值在SBR法处理硫化物过程中出现两个特征区域,分别是一个平台区和随后的快速下降区,单质硫高积累区域在平台和快速下降区之间,这两个区域基本上也不受进水浓度、温度和曝气量的影响。ORP和pH值可以作为硫化物氧化过程的控制参数。

The simulated wastewater containing sulfide was treated by SBR process, and the variations ofORP and pH were analyzed. The results showed that there were two inflection points during the sulfide oxidation, and the highest sulfur concentration was occurred in the plateau region between these two inflection points. And these two feature points were nearly unaffected by the influent concentration, temperature and aeration flow; pH curve had two feature regions, namely a plateau region and a subsequent rapid degradation region, and the highest sulfur concentration was occurred in the area between these two feature regions. And these two feature regions were also nearly unaffected by the influent concentration, temperature and aeration. Therefore, usingORP and pH value as sulfide oxidation control parameters in the SBR is feasible.