AWWA ACE91026

For surface water supplies that contain significant levels of natural organic material, bank infiltration may help achieve compliance with the Surface Water Treatment Rule and other regulations. Bank infiltration involves the intentional construction of one or a series of wells or infiltration galleries near or parallel to the bank of an existing surface water source. The water that is withdrawn is a combination of groundwater and surface water. The water from the surface water source will be of higher quality due to the natural "filtration" provided. This improved water quality is defined in terms of reduced turbidity, total organic carbon, and trihalomethane formation potential. Two case studies are presented. In the first case study, the water quality from the infiltration wells was compared to river water quality. In the second case study, it was found that shallow wells near surface water showed no evidence of the indicator organisms that would require that they meet the SWTR. Bank filtration provided significant removals of turbidity, color, DOC, THM precursor material, and microorganisms; it substantially reduced the primary disinfection requirements and the amount of storage required if chlorine was used as the primary disinfectant; and it substantially reduced the amount and costs of solids handling and disposal.

Product Details

Published:

01/01/1991

ISBN(s):

0898675898

Number of Pages:

12

File Size:

1 file , 290 KB