AWWA QTC97016

Residual aluminum (Al) in treated water has been regulated in Korea since 1995. Since Al is added to raw water as a coagulant during water treatment, the residual Al concentration in treated water is usually greater than that in raw water. Al added as a coagulant rapidly goes through hydrolysis and forms hydroxide flocs. The resulting flocs are then removed by liquid-solid separation following coagulation. Since all dissolved Al should be used during coagulation and all particulate Al should be removed by liquid-solid separation, the residual Al concentration can be used to evaluate water treatment performance. This study utilized such a correlation. A water treatment plant which suffered from high residual Al concentrations in its treated water was monitored for 6 months in order to identify the cause of the high residual Al. Once the cause was identified as inefficient filtration performance the problem was solved by renovating the filters.

Product Details

Published:

01/01/1997

ISBN(s):

0898679583

Number of Pages:

13

File Size:

1 file , 61 KB