AWWA ACE56168

The City of Deerfield Beach historically has supplied their customers with lime softened water from their East and West Softening Facilities. The maximum day demand at the time of the water treatment plant expansion feasibility study for this project was 15 million gallons per day (mgd). The permitted capacity of the West Water Treatment Plant (WTP) was 6.0 mgd with the balance of demand being met from the East WTP. At the time of the study, the raw water quality of the wellfield supplying the East WTP had been declining over the past several years due to saltwater intrusion. As a result, the City determined that all future water supply should be from the West Wellfield and that the West Plant should be expanded to handle current demand and future projected demand. Projections of future growth indicated that the maximum day demand would increase to 18 mgd by 2010. To meet this demand, it was decided to increase the rating on the existing West Plant from 6.0 to 7.5 mgd. The remaining 10.5 mgd of capacity would be met by a new plant expansion project at the West WTP. Process options for expansion of the West Water Treatment Plant included lime softening and membrane softening. The lime softening process would be coupled with ozone for color removal and for reducing the formation of disinfection byproducts (DBPs). Membrane Softening was selected as the water treatment process for the West Water Treatment Plant expansion due to the superior water quality which could be achieved and the enhanced ability to meet future projected drinking water regulations.The membrane treatment facility has been designed with five membrane trains, with each train having a capacity of 2.625 mgd. The required 10.5 mgd of capacity to meet projected maximum day demand requirements can be achieved with four trains in operation with the fifth train acting as an installed standby unit. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/16/2002

Number of Pages:

10

File Size:

1 file , 350 KB