Slurry phase biological treatment

The technology is a slurry-phase biological treatment that, according to the vendor, has successfully treated soil, sludge, groundwater, and process water contaminated with volatile and semivolatile organic compounds (VOCs and SVOCs) such as toluene, naphthalene, fluoranthene, pentachlorophenol, and creosote. 

TABLE 2 Cost Analysis for Slurry-Phase Biological Treatment of 10,000 yd (1994)... 

Weber et al. reported that high-end costs for slurry-phase biological treatment were just under 200/yd of soil treated. This value represented the lowest of the high-end values reported. Weber et al. noted that these high-end values are more realistic representations of hPAHs treatment costs since these compounds are highly hydrophobic. Hydrophobic compounds have slower treatment rates and thus require longer treatment times. This factor adds to remediation costs (D194723, pp. 79, 80). 

Jerger, D. E., Cady, D. J. Exner, J. H. (1994). Full-scale slurry-phase biological treatment of wood-preserving wastes. In Bioremediation of Chlorinated and Polycyclic Aromatic Hydrocarbon Compounds, ed. R. E. Hinchee, A. Leeson, L. Semprini S. K. Ong, pp. 480-3- Boca Raton, FL Lewis Publishers, CRC Press. 

Woodhull, P. M. Jerger, D. E. (1994). Bioremediation using a commercial scale slurry-phase biological treatment system. Remediation, 4, 353—62. 

Cassidy DP, RL Irvine (1997) Biological treatment of a soil contaminated with diesel fuel using periodically operated slurry and solid phase reactors. Water Sci Technol 35(1) 185-192. 

Mueller JG, SE Lantz, BO Blattmann, PJ Chapman (1991b) Bench-scale evaluation of alternative biological treatment processes for the remediation of pentachlorophenol- and creosote-contaminated materials slurry-phase bioremediation. Environ Sci Technol 25 1055-1061. 

Biological treatments have been applied on either slurry or solid phase. Since the remediation performance can be reduced by the presence of chloride and high heavy metal contents, a pretreatment (e.g. mechanical or chemical washing) may be necessary. 

The 1980 s and the early 1990 s have seen the blossoming development of the biotechnology field. Three-phase fluidized bed bioreactors have become an essential element in the commercialization of processes to yield products and treat wastewater via biological mechanisms. Fluidized bed bioreactors have been applied in the areas of wastewater treatment, discussed previously, fermentation, and cell culture. The large scale application of three-phase fluidized bed or slurry bubble column fermen-tors are represented by ethanol production in a 10,000 liter fermentor (Samejima et al., 1984), penicillin production in a 200 liter fermentor (Endo et al., 1986), and the production of monoclonal antibodies in a 1,000 liter slurry bubble column bioreactor (Birch et al., 1985). Fan (1989) provides a complete review of biological applications of three-phase fluidized beds up to 1989. Part II of this chapter covers the recent developments in three-phase fluidized bed bioreactor technology. 

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