In the present study, the effect of external mass transfer on the rate of butachlor biodegradation was studied using calcium alginate immobilized microbial consortium SMC1 in a re-circulated up-flow packed bed bioreactor in a batch scale. By assuming the biodegradation kinetics to be first order, the effect of various operational parameters such as feed flow rate, substrate concentration, and the external mass transfer on the bio-removal of butachlor from the aqueous medium has been explored. Using external film diffusion models and Colburn analogy, the mass transfer correlations at several feed rates were worked out. The correlational analysis obtained in the form of J_D = 1.341 was found to predict the experimental data precisely.

中文翻译：

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在填充床生物反应器中使用固定化微生物菌群 SMC1 进行丁草胺生物降解的传质研究

在本研究中，使用海藻酸钙固定化微生物聚生体 SMC1 在再循环上流填充床生物反应器中批量研究外部传质对丁草胺生物降解速率的影响。通过假设生物降解动力学为一级，研究了进料流速、底物浓度和外部传质等各种操作参数对水介质中丁草胺生物去除的影响。使用外部薄膜扩散模型和 Colburn 类比，计算出几种进料速率下的传质相关性。发现以J _D = 1.341形式获得的相关分析可以精确地预测实验数据。