Treatment of Process Wastewaters for Recycling Using an Advanced Oxidation Process

Proceedings of the 1999 Georgia Water Resources Conference, March 30 and 31, Athens, Georgia.UV-enhanced ozonation experiments on unscreened overflow chiller-water samples from a commercial poultry-processing plant successfully compared the oxidative and bactericidal effects of four treatments (viz., O₂/O₃, O₂/UV, O₂/ O₃/UV, and O₂ as the control). At least a 60% reduction of total microorganisms including similar reductions in coliforms and E. coli as well as the maintenance of light transmission at a value no less than 80% that of fresh water were obtained. This satisfies USDA-FSIS regulations that permit 90% recirculation of 0.5 gal (1.9 L) overflow per carcass required. Also an additional reduction (>0.8 Log CFU/mL) in aerobic plate count (APC) was documented for ozone acting in concert with UV photons as compared with the sum of the effects of O₃ and UV acting separately in series. Economic analysis of operational and maintenance costs for the UV-enhanced ozonation system recommended from this work estimates annual savings of -$244,000 in a 1/4-million bird per day plant achieving water savings of 426,000 L/day (113,000 gal/day).Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, The University of Georgia, Georgia State University, Georgia Institute of TechnologyThis book was published by the Institute of Ecology, The University of Georgia, Athens, Georgia 30602-2202 with partial funding provided by the U.S. Department of Interior, geological Survey, through the Georgia Water Research Insttitute as authorized by the Water Research Institutes Authorization Act of 1990 (P.L. 101-397). The views and statements advanced in this publication are solely those of the authors and do not represent official views or policies of the University of Georgia or the U.S. Geological Survey or the conference sponsors