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首页> 外文期刊>Journal of industrial and engineering chemistry >Ammonia removal by air stripping in a semi-batch jet loop reactor
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Ammonia removal by air stripping in a semi-batch jet loop reactor

机译：在半间歇式射流回路反应器中通过空气汽提去除氨

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摘要

Ammonia is very toxic chemical and it can be removed by air stripping at high pH. JLRs have found applications in wastewater treatment processes due to their high mass transfer rates. In JLRs, intrinsic high turbulence result in a very large air-liquid surface area for greater mass transfer. Therefore, in this study, ammonia removal by air stripping from synthetically prepared ammonia solution at the high pH in a semi-batch JLR due to its high mass transfer capabilities have been investigated. Investigated parameters in a JLR were initial ammonia concentration (10-500 mg/L), temperature (20-50 °C), air flow rate (5-50 L/min) and liquid circulation rate (35-50 L/min). While it was demonstrated that temperature and air flow rate have a significant effect on the ammonia removal, it was determined that initial ammonia concentration and liquid circulation rate have no significant effect on the ammonia removal. The overall volumetric mass transfer coefficients (K_La) have been calculated from obtained model and it was determined that increasing temperature and air flow rate have a very significant effect on K_La. It was concluded that JLR provides higher mass transfer capabilities than other type of reactors even if less air is given.
机译：氨是剧毒的化学物质，可以通过在高pH值下进行空气汽提除去。捷豹路虎由于其高的传质速率而在废水处理过程中得到了应用。在JLR中，固有的高湍流会导致很大的气液表面积，以实现更大的质量传递。因此，在这项研究中，已经研究了半批式JLR中高pH下通过空气汽提从合成制备的氨溶液中除去氨的方法，这是因为其具有较高的传质能力。捷豹路虎的调查参数是初始氨浓度（10-500 mg / L），温度（20-50°C），空气流速（5-50 L / min）和液体循环速率（35-50 L / min） 。虽然已经证明温度和空气流速对氨的去除​​有显着影响，但是已经确定初始氨浓度和液体循环速率对氨的去除​​没有显着影响。已从获得的模型中计算了总的体积传质系数（K_La），并确定温度和空气流速的升高对K_La的影响非常显着。结论是，即使空气较少，JLR仍比其他类型的反应器提供更高的传质能力。

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