AWWA ACE70776

This powerpoint presentation begins by providing a brief overview of desalination processes. A 3-stage concentrate treatment research project is presented, along with the experimental design that includes antiscalant oxidation, and zone decomposition in water - with and without H₂O₂. Research objectives were to: determine the effect of water composition onphosphonate oxidation;determine the effect of pH on phosphonate antiscalantoxidation; and,determine the primary oxidation pathway forphosphonate oxidation. Conclusions indicate that: application of RO inland requires significant reduction inconcentrate volumes, and concentrate treatment is necessary toachieve smaller volumes;antiscalant oxidation increases when calcium coordinationoccurs, and the effect of calcium on antiscalant oxidation isdifferent for each antiscalant;antiscalant oxidation increases with ozone concentration;antiscalant oxidation increases slightly with H2O2 addition, andhas an optimal pH of 6; and,with calcium chelation, the primary oxidation pathway is throughdirect reaction with ozone. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

30

File Size:

1 file , 1.4 MB