Morgenroth Eberhard, Schroeder Edward D, Chang Daniel P Y, Scow Kate M
a Institute for Water Quality Control and Waste Management, Technical University Munich , Garching , Germany.
b Department of Civil and Environmental Engineering , University of California , Davis , California.
J Air Waste Manag Assoc. 1996 Apr;46(4):300-308. doi: 10.1080/10473289.1996.10467464.
A laboratory-scale compost-based biofilter was operated over a six-month period to study the requirements for removal of n-hexane from air. Hexane is a relatively short chain aliphatic hydrocarbon with a high Henry's coefficient and a low water solubility. Acclimation of the biofilter was slow, but removal efficiencies around 80% were achieved after one month of operation. However, performance decreased during the next two months of operation to 50% removal efficiency. Nutrient limitation was proposed as a reason for the decrease in reactor performance. After the addition of a concentrated nitrogen solution, reactor performance increased almost immediately to >99%. Removal efficiency remained above 99% for the following two months of operation at inlet concentrations of 0.7 g/m3 (200 ppmv), at superficial bed velocities approaching 50 m/h, and empty bed residence times of about one minute. Thus, nutrient availability may well limit biofilter performance even in compost- based units. It was shown that nutrients can be added effectively in a soluble form if compost quality is poor and a method is proposed for the evaluation of compost quality.
运行一个实验室规模的基于堆肥的生物滤池六个月，以研究从空气中去除正己烷的要求。己烷是一种相对短链的脂肪烃，亨利系数高且水溶性低。生物滤池的驯化过程缓慢，但运行一个月后去除效率达到了80%左右。然而，在接下来的两个月运行中，性能下降至50%的去除效率。有人提出营养限制是反应器性能下降的原因。添加浓缩氮溶液后，反应器性能几乎立即提高到>99%。在接下来的两个月运行中，当进口浓度为0.7 g/m³（200 ppmv）、表面床层速度接近50 m/h且空床停留时间约为一分钟时，去除效率保持在99%以上。因此，即使在基于堆肥的装置中，营养物质的可用性也很可能限制生物滤池的性能。结果表明，如果堆肥质量较差，可以以可溶形式有效添加营养物质，并提出了一种评估堆肥质量的方法。
