Lee B D, Apel W A, Miller A R
Lockheed-Martin Idaho Technologies Company, Biotechnologies Department, Idaho National Engineering and Environmental Laboratory, Idaho Falls, USA.
J Air Waste Manag Assoc. 1999 Sep;49(9):1068-74. doi: 10.1080/10473289.1999.10463878.
Research was performed to demonstrate the removal of carbon tetrachloride (CT) using compost biofilters operated under methanogenic conditions. Biofilters were operated at an empty-bed residence time of 2.8 minutes using nitrogen as the atmosphere. Hydrogen and carbon dioxide were supplied as an electron donor and carbon source, respectively, during acclimation of the bed medium microbes. Once methanogenesis was demonstrated, CT flow to the biofilter was established. Biofilters were operated over a CT concentration range from 20 to 700 ppbv for 6 months. Bed medium microbes were able to remove up to 75% of the inlet CT. At excessively high CT concentrations (> 500 ppmv), methane production and hydrogen utilization by the bed medium microbes appeared to be inhibited. CT removal by the biofilter decreased when the hydrogen supply was removed from the biofilter inlet, indicating that hydrogen acted as the electron donor for reductive dechlorination. The removal efficiency and relatively low empty bed residence times demonstrated by these laboratory-scale biofilters indicate that anaerobic biofiltration of CT may be a feasible full-scale process.
开展研究以证明在产甲烷条件下运行的堆肥生物滤池对四氯化碳（CT）的去除效果。生物滤池在以氮气为气氛、空床停留时间为2.8分钟的条件下运行。在床层介质微生物驯化期间，分别提供氢气和二氧化碳作为电子供体和碳源。一旦证明产甲烷作用发生，便开始向生物滤池通入CT。生物滤池在CT浓度范围为20至700 ppbv的条件下运行了6个月。床层介质微生物能够去除高达75%的入口CT。在CT浓度过高（> 500 ppmv）时，床层介质微生物的甲烷生成和氢气利用似乎受到抑制。当从生物滤池入口去除氢气供应时，生物滤池对CT的去除率下降，这表明氢气作为还原脱氯的电子供体。这些实验室规模的生物滤池所展示的去除效率和相对较低的空床停留时间表明，CT的厌氧生物过滤可能是一个可行的全规模处理工艺。
