AWWA ACE61871

This paper presents the Integration Study methodology, the resulting finished water goals, and thetreatment process design for the Twin Oaks Water Treatment Plant, which is part of the San Antonio Water System (SAWS) CarrizoASR Project. The Carrizo ASR Project is a conjunctive use water supply project that utilizes water fromthe Carrizo Aquifer in South Bexar County, Texas. Phase 1 of the program consists of a new production wellfield that is capable of producing 30 mgd. These initial wells will feed a new 30 mgd water treatmentplant (Twin Oaks) designed to remove high levels of dissolved iron, manganese, carbon dioxide, andhydrogen sulfide. The treated groundwater will then be conveyed approximately 25 miles where it entersthe SAWS distribution system. Phase II of the project will increase the aquifer storage capacity of theproject to 60 mgd, and make provisions to utilize additional Carrizo Aquifer groundwater from GonzalesCounty.Since Edwards Aquifer groundwater only requires disinfection, the new Twin Oaks Water TreatmentPlant is the first potable water treatment facility to be constructed by SAWS. As described in this paper, thedesign of the treatment process for this facility was influenced not only by the need to removecontaminants from the south Bexar Carrizo groundwater, but by the recommendations of the IntegrationStudy, which proved that substantial treatment was also needed to reduce the possibility of water qualityimpacts when the new water source is introduced into SAWS distribution system. Includes 2 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/17/2005

Number of Pages:

19

File Size:

1 file , 1.7 MB