Full Description

Riverbank filtration (RBF) is a processin which pumping wells locatedalong riverbanks induce a portion ofthe river water to flow toward thewells. During RBF, which has many similaritiesto slow-sand filtration, river watercontaminants are attenuated from a combinationof processes such as filtration,microbial degradation, sorption to sedimentsand aquifer sand, and dilution withbackground groundwater.RBF systems have been operating inEurope since the 1870s. In the UnitedStates, there has been renewed interestamong large- to medium-sized utilities touse it as a mechanism of water productionto reduce treatment costs and to meetregulations on pathogens, disinfection byproducts,and other contaminants underthe Surface Water Treatment Rule.Although filtrate water quality fromRBF systems can vary based on river conditions,it is possible that appropriatelydesigned systems can serve as pretreatmentfor drinking water, and at the same time,the utility can receive log-removal creditsfor pathogens and particles. In addition,RBF can be used as a pretreatment formembrane filtration.In the United States, a knowledge gapexists on the benefits and limitations ofusing RBF. This paper addresses thosegaps, outlining the benefits and limitationsof the process. It also illustrates that RBFcan be a viable alternative to surface waterat suitable sites. Includes 35 references, tables, figures.

Product Details

Edition: Vol. 94 - No. 4 Published: 04/01/2002 Number of Pages: 12 File Size: 1 file , 480 KB