AWWA ACE58095

Potable water plant operators face two major issues in the 21st century - raw waterquality and quantity. Approximately 2/3 of the systems in use today draw groundwater astheir source. The quality of source water can adversely impact the ability of the operatorto pump it to the surface for treatment prior to supplying customers with a product thatmeets all regulatory requirements. Groundwater wells can become fouled due to silt andclays, mineral precipitates, or non- pathogenic bacteria (biofouling). This fouling canimpede the pumping process, which reduces capacity and results in high operatingcosts, as well as expensive maintenance or replacement well cost. This paper discusses the most commoncauses of fouling that include: silts and clays; mineral precipitates; and, biological fouling. In the past, mechanical physical agitation, acid, and chlorine have all been used separately or in combination to address the above fouling problems. The paper discusses how, in order to adequately rehabilitate and meet the objective of returning a potable water well to its original capacity, the proper criteria must be met. A case study is presented on how the "Well-Klean Preblend" product was used to chemically rehabilitate a well in Lake Havasu City, Arizona.

Product Details

Edition:

Vol. - No.

Published:

06/15/2003

Number of Pages:

5

File Size:

1 file , 240 KB