Methods for determining assimilable organic carbon and some factors affecting the van der Kooij method. [EUROPE]
- Univ. of Alberta, Edmonton (Canada)
It has been demonstrated in many advanced European drinking water facilities that the application of ozone in conjunction with a subsequent granular activated carbon (GAC) treatment step results in reduced distribution system disinfectant demand. This is due, in large measure, to the removal of biodegradable organic substances by miroorganisms colonizing the activated carbon. The concentration of easily biodegradable or assimilable caron (AOC) can be measured in various ways. This paper compares available methods for measuring AOC or bacterial regrowth, and presents pilot plant results showing some factors affecting the van der Kooij method. Difficulties with the survival of Pseudomonas aeruginosa P17 strain following sedimentation are attributed to the use of polyaluminum chloride as a coagulant. This effect was, however, not evident at low doses of polyaluminum chloride. Incidents of inhibition of P17 following ozonation have been observed but, as of yet, not explained. Filtration of samples through cellulose/acetate filters will increase the concentration of AOC determined significantly.
- OSTI ID:
- 5411628
- Journal Information:
- Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States), Vol. 12:4; ISSN 0191-9512
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DRINKING WATER
OZONIZATION
ACTIVATED CARBON
BACTERIA
EUROPE
OZONE
SEDIMENTATION
WATER TREATMENT
ADSORBENTS
CARBON
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
MICROORGANISMS
NONMETALS
OXYGEN COMPOUNDS
WATER
320603* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Public Utilities- (1980-)