The Impact of Rainfall on Flows and Loadings at Georgia’s Wastewater Treatment Plants

Proceedings of the 2007 Georgia Water Resources Conference, March 27-29, 2007, Athens, Georgia.Inflow and Infiltration (I/I) is extraneous water that enters a sewage treatment plant via groundwater infiltration or direct stormwater entry into sewers. This study is an attempt to quantify I/I impacts based on an assessment of influent and effluent data from twenty-four wastewater treatment plants (WWTPs) in Georgia with design capacities of 37,850 m3/d (10-mgd) or greater. Twelve months of operating data from the 2003 calendar year were evaluated. The objectives of the study were to determine the effect of rainfall intensity on the volumetric flow rate to each WWTP; and the relationship between flow rate and the influent biochemical oxygen demand (BOD) and influent Total Suspended Solids (TSS) concentrations. Moderate to strong correlations were observed between rainfall intensity and volumetric flow rate; and volumetric flow rate and influent BOD and TSS concentrations. Weak correlations were observed for some of the relationships when applied to the complete data set; however, stronger correlations were achieved by performing statistical analyses of variance and pooling subsets of the data. Peaking factors were similar to those reported in the literature.Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, Natural Resources Conservation Service, 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. 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, the U.S. Geological Survey, the Georgia Water Research Institute as authorized by the Water Resources Research Act of 1990 (P.L. 101-397) or the other conference sponsors

Environmental engineering : principles and practice

This book provides a clear and concise understanding of the major topic areas facing environmental professionals. For each topic, the theoretical principles are introduced, followed by numerous examples illustrating the process design approach. Practical, methodical and functional, this exciting new text provides knowledge and background, as well as opportunities for application, through problems and examples that facilitate understanding