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生物膜滴滤床降解低浓度有机废气的理论模型 被引量:16

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摘要 将生物膜滴滤塔内的多孔填料简化为由多个管内覆盖有生物膜的竖直毛细管并行排列构成的填料,建立了一个净化低浓度有机废气的毛细管模型.运用两相流理论获得了毛细管内液膜厚度分布,然后考虑气液界面、液膜和生物膜内的传质阻力以及氧对微生物生化反应的限制,并结合生化反应动力学理论,建立了气相、液相的传质方程以及生物膜内的传质与生化反应动力学方程.对离散后的方程进行了迭代求解.模型的理论预测值与净化低浓度甲苯废气的实验值基本吻合.计算结果表明:在一定的进口污染物浓度条件下,滴滤塔的净化效率随气体流量和液体流量的增加而下降.降解有机废气的速率主要受液膜传质阻力控制,越接近滴滤塔废气,进口的污染物降解率越高.
出处 《中国科学(E辑)》 CSCD 北大核心 2003年第5期435-442,共8页 Science in China(Series E)
基金 国家自然科学基金资助项目(批准号:50006015) 重庆市科技攻关项目(批准号:2001-6681) 重庆市应用基础研究项目(批准号:2000-6256 2001-6877)资助
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