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首页> 外文期刊>Bioprocess and Biosystems Engineering >Experiments and three phase modelling of a biofilter for the removal of toluene and trichloroethylene
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Experiments and three phase modelling of a biofilter for the removal of toluene and trichloroethylene

机译：用于去除甲苯和三氯乙烯的生物滤池的实验和三相建模

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摘要

Volatile organic compounds, namely, toluene, trichloroethylene, styrene, etc., disposed off by electronics and polymer industries, are very harmful. The treatment of VOC laden air through biochemical route is one of the potential options for reduction of their concentration in parts per million or parts per billion level. Under the present investigation, a 0.05-m diameter and 0.58-m high trickle bed biofilter has been studied for the removal of VOCs namely toluene and trichloroethylene from a simulated air-VOC mixture using pure strain of Pseudomonas putida (NCIM2650) in immobilized form. Inlet concentrations of VOCs have been varied in two ranges, the lower being 0.20-2.00 g/m~3 and higher being 10-20 g/m~3, respectively. The Monod type rate kinetics of removal of VOCs has been determined. A three-phase deterministic mathematical model has been developed taking the simultaneous reaction kinetics and interphase (gas to liquid to biofilm) mass transfer rate of VOCs into consideration. Experimentally determined kinetic parameters and mass transfer coefficients calculated using standard correlations have been used. Concentrations have been simulated for all the three phases. Simulated results based on the model have been compared with the experimental ones for both gas and liquid phases satisfactorily. The mathematical model validated through the successful comparison with experimental data may be utilized for the prediction of performance of biofilters undergoing removal of different VOCs in any further investigation and may be utilized for the scale-up of the system to industrial scale.
机译：电子和聚合物工业所排放的挥发性有机化合物（甲苯，三氯乙烯，苯乙烯等）非常有害。通过生化途径处理含VOC的空气是降低其浓度（百万分之一或十亿分之几）的潜在选择之一。在本研究中，已研究了使用固定化恶臭假单胞菌纯菌株（NCIM2650）从模拟的空气-VOC混合物中除去直径为0.05 m，高为0.58 m的滴流床生物滤池的方法，以去除VOC，即甲苯和三氯乙烯。 VOCs的入口浓度在两个范围内变化，较低的分别为0.20-2.00 g / m〜3，较高的为10-20 g / m〜3。已经确定了去除VOC的Monod型速率动力学。考虑到VOC的同时反应动力学和相间（气体到液体到生物膜）传质速率，开发了一个三相确定性数学模型。已经使用实验确定的动力学参数和使用标准相关性计算的传质系数。对所有三个阶段的浓度进行了模拟。基于该模型的模拟结果已与气相和液相的实验结果令人满意地进行了比较。通过与实验数据的成功比较而验证的数学模型可用于预测在进行任何进一步研究时经历去除不同VOC的生物过滤器的性能，并可用于将系统规模扩大到工业规模。

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