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Biotrickling filters for the removal of gaseous ammonia emissions from livestock facilities. Theoretical prediction of removal efficiency and experimental validation
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2020-07-09 , DOI: 10.1016/j.cej.2020.126188
Eric Dumont , Morgane Poser , Pascal Peu , Annabelle Couvert

From theoretical calculations validated by the results of experiments, it was shown that the properties of the washing liquid that flows into biotrickling filters at livestock facilities determine the maximum ammonia removal efficiency (RE) that can be achieved. For a well-designed biotrickling filter not limited by hydrodynamic conditions, the ammonia driving force is mainly controlled by the pH, and also by the electrical conductivity (ECL), although to a lesser extent. With the washing liquid at a given temperature, therefore, the removal efficiency depends on the gaseous ammonia concentrations to be treated (CGin; usually lower than 20 mgNH3 m−3) and on the values of the pair (pH, ECL). Theoretical prediction of the maximum removal efficiency that can be achieved by simply measuring the properties of the washing liquid, in line or from samples, could be a useful diagnostic tool to identify possible failure of the apparatus and to manage the electrical conductivity to guarantee removal efficiency at a desired rate.



中文翻译:

生物滴滤过滤器,用于清除畜牧设施中的氨气排放。去除效率的理论预测与实验验证

通过实验结果验证的理论计算表明,流入牲畜设施生物滴滤池的洗涤液的特性决定了可达到的最大氨去除效率(RE)。对于不受水动力条件限制的设计良好的生物滴滤器,氨驱动力主要受pH控制,也受电导率(EC L)控制,尽管程度较小。因此,对于给定温度的洗涤液,去除效率取决于要处理的气态氨气浓度(C Gin;通常低于20 mg NH3 m -3)和该对值(pH,EC L)。可以通过简单地在线或从样品中测量清洗液的性能来实现的最大去除效率的理论预测,可能是一种有用的诊断工具,可用于识别设备可能的故障并管理电导率以确保去除效率以期望的速度。

更新日期:2020-07-15
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