Aizpuru A, Malhautier L, Roux J C, Fanlo J L
Ecole des Mines d'Alès, Laboratoire Génie de l'Environnement Industriel, 6, Avenue de Clavières, 30319 Alès Cedex, France.
Biotechnol Bioeng. 2003 Aug 20;83(4):479-88. doi: 10.1002/bit.10691.
The performance of a biofilter packed with Active Carbon (AC) was evaluated. The effluent (alcohol, ketones, esters, aromatic and chlorinated compounds) treated was a representative mixture of most common industrial emissions. To achieve a better knowledge of multicomponent adsorption mechanisms, and to underline the interest of inoculating AC, a control abiotic humidified filter had been operated in the same conditions as the biofilter. For a load of 110 g VOC m(-3) AC h(-1), after 55 days of operation, the removal efficiency was higher in the biotic than in the abiotic filter (85% vs 55%, respectively). Moreover, in the biofilter, at steady state, the elimination of all compounds was almost complete except for chlorinated compounds and p-xylene (removal efficiency of 25% and 64%, respectively). The microbial colonization of AC involved a decrease of the adsorption sites accessibility and enhanced the treatment of VOCs (volatile organic compounds) having a lower affinity for activated carbon. Moreover, while aromatic compounds and MIBK were eliminated along the overall height of the biofilter, pollutants with reduced affinity for AC, such as methanol, acetone, and halogenated compounds were only treated on the second half of the reactor. Thus, the affinity for activated carbon was an important parameter controlling the biodegradation process. Nevertheless, the use of AC as packing material in biofilters treating complex mixtures of VOCs is limited. Actually, similar removal efficiency could be reached, in the same conditions, for a biofilter packed with granular peat. Furthermore, for the biofilter packed with AC, the column height necessary to remove biodegradable compounds, with reduced affinity for the support, was important.
对填充有活性炭（AC）的生物滤池性能进行了评估。所处理的流出物（酒精、酮类、酯类、芳香族和氯化化合物）是大多数常见工业排放物的代表性混合物。为了更好地了解多组分吸附机制，并强调接种活性炭的意义，在与生物滤池相同的条件下运行了一个对照非生物加湿滤池。对于110 g VOC m(-3) AC h(-1)的负荷，运行55天后，生物滤池的去除效率高于非生物滤池（分别为85%和55%）。此外，在生物滤池中，在稳态下，除了氯化化合物和对二甲苯（去除效率分别为25%和64%）外，所有化合物的去除几乎是完全的。活性炭的微生物定殖导致吸附位点可及性降低，并增强了对与活性炭亲和力较低的挥发性有机化合物（VOCs）的处理。此外，虽然芳香族化合物和甲基异丁基酮在生物滤池的整个高度上被去除，但对活性炭亲和力降低的污染物，如甲醇、丙酮和卤代化合物仅在反应器的后半部分得到处理。因此，对活性炭的亲和力是控制生物降解过程的一个重要参数。然而，在处理VOCs复杂混合物的生物滤池中使用活性炭作为填充材料是有限的。实际上，在相同条件下，填充有颗粒泥炭的生物滤池可以达到类似的去除效率。此外，对于填充有活性炭的生物滤池，去除对载体亲和力降低的可生物降解化合物所需的柱高很重要。
