Premium
Canadians Commend Biological Treatment
Author(s) -
Dart F. J.
Publication year - 1985
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1985.tb05513.x
Subject(s) - clearance , aeration , filtration (mathematics) , filter (signal processing) , water treatment , nitrification , environmental science , chemistry , waste management , environmental engineering , computer science , engineering , mathematics , organic chemistry , nitrogen , medicine , statistics , computer vision , urology
The author of this letter to the editor details Canadian experience with the use of biological treatment for water purification. In a study designed to come up with parameters for new filtration facilities in Markam Township, Ontario, it was learned that filters without prechlorination had been removing an organic precursor to a strong chloroflavor problem. This study seemed to verify that biological growths absorb those substances that are most biologically accumulative. The new aeration‐plus‐pressure filter plant designed at 5 Igpm/sq ft successfully removed the chloroflavor. The author emphasizes the relative value of organic stabilization compared with the nitrification aspects of an earlier article by Rittman and Snoeyink entitled, “Achieving Biologically Stable Drinking Water” in the October 1984 Journal American Water Works Association. In another instance, a red water problem in the community of Brooklin, Ontario, was cleared up by reverting from prechlorination to postchlorination at the iron removal filter and by restoring the original prefilter air injection.