Biomass accumulation and clogging in biotrickling filters for waste gas treatment. Evaluation of a dynamic model using dichloromethane as a model pollutant.
Biomass accumulation and clogging in biotrickling filters for waste gas treatment. Evaluation of a dynamic model using dichloromethane as a model pollutant.
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DOI：
10.1002/(sici)1097-0290(19990520)63:4
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发表时间：
1999-05
影响因子：
3.8
通讯作者：
Wjh Okkerse;Spp Simon Ottengraf;Spp Simon Ottengraf;B. Osinga-Kuipers;M. Okkerse
中科院分区：
文献类型：
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作者：
Wjh Okkerse;Spp Simon Ottengraf;Spp Simon Ottengraf;B. Osinga-Kuipers;M. Okkerse
建立了生物滴滤塔（BTF）净化废气中挥发性酸化污染物的动力学模型。动态建模使工程师能够预测滤床的堵塞率以及BTF适应其入口浓度变化所需的时间。管理BTF行为的最重要的机制被纳入模型中。生物质在过滤器中的积累的时间尺度进行了研究，并提出了一种方法，可以用来估计多久BTF可以操作之前，它的填料必须被清洗。以二氯甲烷（DCM）为模型酸化污染物，进行了为期三个月的实验验证模型。有价值的实验数据，生物量的积累和液体滞留在反应器中获得的实验装置，允许连续登记的BTF的重量。结果表明，在从废气中消除DCM的BTF中，预计高达几g/m3的浓度不会发生堵塞。基于测量结果的模型计算还表明，每单位空隙填充体积可以安全施加的最大碳负荷不应超过0.5-1.6 C mol/（m3. h），这取决于所形成的生物膜的密度。该模型是一个很好的预测系统中的污染物的消除，轴向气体和液体的浓度分布，轴向生物量分布，以及系统的响应后，在DCM的入口浓度逐步增加。研究了液相中缓冲液浓度对BTF性能的影响。
A dynamic model is developed that describes the degradation of volatile acidifying pollutants in biotrickling filters (BTFs) for waste gas purification. Dynamic modelling enables the engineer to predict the clogging rate of a filter bed and the time it takes the BTF to adapt to changes in its inlet concentration. The most important mechanisms that govern the behaviour of the BTF are incorporated in the model. The time scale of the accumulation of biomass in a filter is investigated, and an approach is presented that can be used to estimate how long a BTF can be operated before its packing has to be cleaned. A three-month experiment was carried out to validate the model, using dichloromethane (DCM) as a model acidifying pollutant. Valuable experimental data about biomass accumulation and liquid hold-up in the reactor were obtained with an experimental set-up that allows the continuous registration of the weight of the BTF. The results show that in BTFs eliminating DCM from a waste gas, clogging is not to be expected up to concentrations of several g/m3. Model calculations based on the measurements also suggest that the maximum carbon load that can safely be applied per unit void packing volume should not exceed 0.5-1.6 C mol/(m3. h), depending on the density of the biofilm formed. The model is a good predictor of the elimination of the pollutant in the system, the axial gas and liquid concentration profiles, the axial biomass distribution, and the response of the system upon a stepwise increase in the DCM inlet concentration. The influence of the buffer concentrations in the liquid phase upon the performance of the BTF is investigated.