Indoor potted plant based biofilter: performance evaluation and kinetics study

Plant based biofilters associated with microorganisms have been gaining popularity in controlling odorous compounds like volatile organic compounds (VOCs) as they are cost effective and an environment friendly alternative to conventional air pollution control techniques. In this context, here, we tried to evaluate the performance of potted plants based Claire's biofilter for biodegradation of benzene. A sealed perspex chamber with lid and fan was designed to ensure minimum leakage, proper aeration and distribution of benzene inside the chamber. Five different ornamental indoor plants were placed inside the chamber sequentially and exposed to a concentration of 5 ppm benzene for 30 h each. The leakage of benzene was checked beforehand. Epipremnum aureum (Money plant) showed maximum benzene degradation in the aforementioned time period with a removal efficiency of 98%. The mu(max) and K-s values for 100 ppm concentration of benzene were calculated to be 0.284 h(-1) and 0.427 g/m(3), respectively.