AWWA JAW56640

A 12-month assimilable organic carbon (AOC) survey of 64 conventional water treatmentplants was conducted to assess mechanisms affecting effluent AOC levels. The effect ofconventional treatment steps (i.e., oxidation, coagulation, filtration, disinfection) on theformation or removal of biodegradable organic matter (BOM) was also investigated at six ofthe sites. BOM levels were increased or decreased by various factors including the type offilter media, the type of coagulant used, and the level of watershed protection of the plant'ssource water. Systems that prechlorinated and used anthracite/sand filtration generally hadlow removal of dissolved organic carbon (DOC) and biodegradable DOC (BDOC) and increasesin AOC levels through the treatment process. Systems combining prechlorination and granularactivated carbon (GAC) filtration showed increases in AOC in the settled water but removalof AOC through filtration. DOC and BDOC levels were generally reduced by conventionalsand/GAC filtration. Includes 41 references, tables, figures.

Product Details

Edition:

Vol. 94 - No. 6

Published:

06/01/2002

Number of Pages:

12

File Size:

1 file , 260 KB