used a specially designed reactor to evaluate the capture and biodegration
of petroleum products in a layer of mulch, as in bioretention. The
runoff containing the pollutants was applied to the reactor, which holds
the mulch. The system is closed to allow the capture of any
petroleum product that volatilizes. A mass balance is employed to
quantify pollutant removal and biodegradation.
work has investigated naphthalene and toluene as representative petroleum
products, as well as a motor oil. These compounds are readily captured by the mulch,
being removed from infiltrating runoff. The biodegradation of these
compounds occurs within a few days for naphthalene and toluene, and in
about a week for the motor oil. The efficiency with
particulate-bound material was also investigated.
of this work have been published:
E., Seagren, E.A., and Davis, A.P. “Sustainable Oil and Grease Removal
from Synthetic Storm Water Runoff Using Bench-Scale Bioretention
Studies,” Water Environ. Res., 78(2),