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EMERGING TECHNOLOGY SUMMARY: INNOVATIVE METHODS FOR BIOSLURRY TREATMENT
Citation:
Brown, K. EMERGING TECHNOLOGY SUMMARY: INNOVATIVE METHODS FOR BIOSLURRY TREATMENT. EPA/540/SR-96/505, 1997.
Impact/Purpose:
information
Description:
The tests reported herein were conducted by IT Corporation (IT), Knoxville, TN, to investigate the feasibility of combined biological and chemical treatments to treat polycyclic aromatic hydrocarbons (PAHs). Bioslurry treatment of PAH-contaminated soils was demonstrated under the Superfund Innovative Technology Evaluation - Emerging Technology Program (SITE ETP) as an extension of research previously funded by IT (Brown and Sanseverino 1993) and additional investigations supported by the U.S. Environmental Protection Agency (U.S. EPA) (Dávila et al. 1994). All testing was initiated in September 1994. During the demonstration, IT operated two 60-liter (L) TEKNO Associates bioslurry reactors (Salt Lake City, UT) and a 10-L reactor in series under semicontinuous, plug-flow mode for a 7-month period. The first 60-L reactor received fresh feed daily and supplements of salicylate and succinate to enhance PAH biodegradation. Slurry from the first reactor was fed to the second 10-L reactor, where Fenton’s reagent (Fe+++H2O2) was added to accelerate chemical oxidation of 4 to 6-ring PAHs. The third reactor in series was used to biologically oxidize contaminants remaining following addition of Fenton’s reagent. This reactor received no additions of salicylate and succinate and was aerated, nutrient amended, and pH adjusted only. During operation, the reactor system demonstrated total PAH and carcinogenic PAH (CPAH) transformation up 95% and 84%, respectively.
URLs/Downloads:
EMERGING TECHNOLOGY SUMMARY: INNOVATIVE METHODS FOR BIOSLURRY TREATMENT540SR96505.PDF (PDF, NA pp, 1 KB, about PDF)