Raghuvanshi Smita, Babu B V
Chemical Engineering Group, Birla Institute of Technology and Science, Pilani, Rajasthan, India.
Bioresour Technol. 2009 Sep;100(17):3855-61. doi: 10.1016/j.biortech.2009.03.025. Epub 2009 Apr 8.
The removal of toxic methyl ethyl ketone (MEK) is studied in a lab scale biofilter packed with mixture of coal and matured compost. The biofiltration operation is divided into 5 phases for a period of 60 days followed by shock loading conditions for three weeks. The maximum removal efficiency of 95% is achieved during phase II for an inlet concentration of 0.59 gm(-3), and 82-91% for the inlet concentration in the range of 0.45-1.23 gm(-3) of MEK during shock loads. The Michaelis-Menten kinetic constants obtained are 0.086 gm(-3)h(-1) and 0.577 gm(-3). The obtained experimental results are validated using Ottengraf-van den Oever model for zero-order diffusion-controlled region to understand the mechanism of biofiltration. The critical inlet concentration of MEK, critical inlet load of MEK and biofilm thickness are estimated using the results obtained from model predictions.
在一个填充有煤和成熟堆肥混合物的实验室规模生物滤池中，对有毒的甲乙酮（MEK）去除情况进行了研究。生物过滤操作分为5个阶段，为期60天，随后是为期三周的冲击负荷条件。在第二阶段，对于0.59克/立方米的入口浓度，实现了95%的最大去除效率；在冲击负荷期间，对于0.45 - 1.23克/立方米范围内的MEK入口浓度，去除效率为82 - 91%。得到的米氏动力学常数分别为0.086克/立方米·小时⁻¹和0.577克/立方米。使用Ottengraf - van den Oever模型对零级扩散控制区域进行验证，以了解生物过滤的机制，从而验证所获得的实验结果。利用模型预测结果估算了MEK的临界入口浓度、MEK的临界入口负荷和生物膜厚度。
