• AWWA MTC69781
Provide PDF Format

Learn More

AWWA MTC69781

  • Brine Minimization and Beneficial Reuse for Brackish Groundwater Desalination
  • Conference Proceeding by American Water Works Association, 11/01/2009
  • Publisher: AWWA

$12.00$24.00


Many of the City of San Diego's groundwater sources require desalination, due tohigh salinity, before it can be used to supplement drinking water supply. One of theCity's potential groundwater desalination projects is located in an inland area, wherereverse osmosis (RO) concentrate disposal options are limited. This location, on the SanPasqual Basin, also has high levels of silica that limit RO process recovery to 65-75%.In order to increase the overall recovery of the desalination process, two innovativetechnologies were tested in this study. A Vibratory Shear Enhanced Process (VSEP) anda Bipolar Membrane Electrodialysis (BMED) system were used for RO brineminimization and beneficial reuse, respectively. Studies with VSEP were performed atthe pilot scale. The VSEP system was tested with a range of flux (30-65 gfd) andrecovery (50-75 %). After pretreatment (acid and antiscalant) of RO concentrate, anoverall feed water recovery of more than 93 % was achieved by using VSEP for treatingprimary RO concentrate. The product water quality from the VSEP was similar to theprimary RO. On average, two chemical cleanings/week were necessary for the VSEP. Forbeneficial reuse, a bench-scale BMED system was used to generate acid and base fromRO concentrate. The BMED process was tested as a proof of concept technology fortreating RO brine. Dissociation of salt was accomplished by using a DC voltage betweentwo electrodes. BMED was effective in treating RO concentrate and producing acid andbase for beneficial reuse. Mixed acids and bases with concentrations up to 0.2 N wereproduced using BMED for treating RO concentrate. Includes 11 references, tables, figures.

Related Products

AWWA WQTC57100

AWWA WQTC57100

Adaptation of Method 1622 for Cryptosporidium for Analysis of Wastewater..

$12.00 $24.00

AWWA C203-15

AWWA C203-15

Coal-Tar Protective Coatings and Linings for Steel Water Pipe..

$41.00 $81.00

AWWA C512-15

AWWA C512-15

Air Release, Air/Vacuum, and Combination Air Valves for Waterwork and Wastewater Service..

$41.00 $81.00

AWWA 51637

AWWA 51637

New Customer Data Management System Will Improve Service to BIG Customers..

$12.00 $24.00