AWWA ACE65258

In 1994, the Carmel Area Wastewater District, Pebble Beach Community Services District,Monterey Peninsula Water Management District, and Pebble Beach Company formed apublic/private joint venture to produce and deliver recycled water for irrigation to sevengolf courses in Pebble Beach, California, including world-renowned Pebble Beach GolfCourse. Through this venture they began the Water Reclamation Project, which includedtertiary treatment by sand filtration and chlorine disinfection. Shortly after start ofoperation of the new tertiary facilities, the Pebble Beach golf courses began experiencingsome problems with the turf grass, particularly on the greens. This was discovered toprimarily be the result of high sodium concentrations and high total dissolved solids (TDS)concentrations. To remedy the problem, the consortium, along with golf coursesuperintendents, turf grass specialists, and Carollo, began the Salinity Management Projectwith the intent of improving the water quality and increasing the quantity of recycled wateravailable for irrigation. As a result of early discussions, the turf grass water quality criteriawas established and included limits of sodium concentration, Sodium Adsorption Ratio(SAR), and adjusted SAR, and ranges of electro-conductivity and pH. Microfiltration (MF)followed by reverse osmosis (RO) was selected to meet this water quality criteria. MF willalso allow the treatment facilities to continue to meet the California Title 22 requirementsfor unrestricted use of recycled water. Much attention was also given to developing acontrol strategy to help minimize the operational complexity of the MF/RO system underthe varying influent water quality and quantity. Several chemical feed systems, such ascalcium hydroxide and gypsum, are also included to help meet the turf grass water qualitycriteria and to help stabilize the corrosive RO permeate. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2007

Number of Pages:

36

File Size:

1 file , 2.6 MB