Mathur Anil K, Majumder C B, Singh Dhananjay, Bala Shashi
Applied Mechanics Department, Motilal Nehru National Institute of Technology, Allahabad - 211 004, India.
J Environ Biol. 2010 Jul;31(4):445-51.
In the present study, performance of the trickle bed airbiofilter (TBAB) for treating mono-chlorobenzene (MCB) was evaluated for various influent volatile organic compound (VOC) loadings using coal and mixed consortium of activated sludge as the packing material. Microbial acclimation to MCB was achieved by exposing the system continuously for 31 d to an average inlet MCB concentration of 0.688 g m(-3) at an empty bed residence time (EBRT) of 188 s. The TBAB achieved maximum removal efficiency of 87% at an EBRT of 188 s for an inlet concentration of 0.681 g m(-3), which is quite significance than the values reported in the literature. Elimination capacities of MCB increased with an increase of the influent VOC loading, but an opposite trend was observed for the removal efficiency The maximum elimination capacity of the biofilter was 110.75 g m(-3) hr(-1) at an inlet MCB concentration of 1.47 g m(-3). The effect of starvation on the TBAB was also studied. After starvation, the TBAB lost its ability to degrade MCB initially However the biofilter recovered very quickly Evaluation of the concentration profile along the bed height indicated that the bottom section of TBAB has the best performance for all concentrations. By using Wani's method of macrokinetic determination based on simple Monod kinetics, the maximum removal rate of MCB, r(max) and saturation constant K(m) was to be found as 1.304 g m(-3)s(-1) and 113.446 g m(-3), respectively.
在本研究中，使用煤和活性污泥混合菌群作为填充材料，评估了滴流床空气生物滤池（TBAB）在不同进水挥发性有机化合物（VOC）负荷下处理一氯苯（MCB）的性能。通过在空床停留时间（EBRT）为188 s的条件下，将系统连续暴露于平均进水MCB浓度为0.688 g m(-3)的环境中31天，实现了微生物对MCB的驯化。对于进水浓度为0.681 g m(-3)的情况，TBAB在EBRT为188 s时达到了87%的最大去除效率，这比文献报道的值具有相当大的意义。MCB的去除能力随着进水VOC负荷的增加而增加，但去除效率呈现相反的趋势。在进水MCB浓度为1.47 g m(-3)时，生物滤池的最大去除能力为110.75 g m(-3) hr(-1)。还研究了饥饿对TBAB的影响。饥饿后，TBAB最初失去了降解MCB的能力，但生物滤池很快恢复。沿床层高度的浓度分布评估表明，TBAB的底部区域在所有浓度下性能最佳。通过使用基于简单莫诺德动力学的瓦尼宏观动力学测定方法，发现MCB的最大去除速率r(max)和饱和常数K(m)分别为1.304 g m(-3)s(-1)和113.446 g m(-3)。
