Periodically operated bioreactors for the treatment of soils and leachates

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:479369

Irvine, R L; Cassidy, D P ^[1]

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1. Univ. of Notre Dame, IN (United States). Center for Bioventing and Pollution Control

Limited contaminant bioavailability at concentrations above the required cleanup level reduces biodegradation rate and renders solid-phase bioremediation more cost effective than complete treatment in a bioslurry reactor. Slurrying followed by solid-phase bioremediation combines the advantages and minimizes the weaknesses of each treatment method when used alone. Periodic aeration during solid-phase bioremediation has the potential to lower treatment costs relative to continuous aeration. A biological treatment system consisting of slurrying followed by periodic aeration in solid-phase sequencing batch reactors (SP-SBRs) was developed and tested in the laboratory using a silty loam contaminated predominantly with the plasticizer bis(2-ethylhexyl)phthalate (BEHP) or (DEHP) and a silty clay loam contaminated with diesel fuel. The first experiment evaluated the effect of water content and mixing time during slurrying on subsequent treatment in continuously aerated solid-phase bioreactors. The second experiment compared treatment of slurried soil in SP-SBRs using three different periodic aeration strategies with continuous aeration.

• OSTI ID: 479369
• Report Number(s): CONF-950483--; ISBN 1-57477-010-1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
54 ENVIRONMENTAL SCIENCES
BIODEGRADATION
BIOREACTORS
DIESEL FUELS
HYDROCARBONS
LEACHATES
PHTHALATES
REMEDIAL ACTION
SLURRIES
SOILS
TECHNOLOGY ASSESSMENT