Comparison of Adsorptive and Biological Total Organic Carbon Removal by Granular Activated Carbon in Potable Water Treatment

1983 ◽  
pp. 279-302 ◽  
Author(s):  
S. W. MALONEY ◽  
K. BANCROFT ◽  
I. H. SUFFET ◽  
P. R. CAIRO
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Potable Water ◽  
Granular Activated Carbon ◽  
Carbon Removal ◽  
Total Organic Carbon Removal ◽  
Potable Water Treatment

Effect of multiple GAC reactivations on disinfection byproduct precursor removal

2004 ◽  
Vol 4 (4) ◽  
pp. 71-78 ◽  
Author(s):  
D.H. Metz ◽  
J. DeMarco ◽  
R. Pohlman ◽  
F.S. Cannon ◽  
B.C. Moore
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Water Treatment Plant ◽  
The Other ◽  
Disinfection Byproduct ◽  
Better Than

The objective of this study was to compare the adsorption capabilities of the virgin carbon to the twelve and five times reactivated granular activated carbon (GAC). From a water treatment plant operator's perspective, there were very few practical differences in adsorption among the carbons tested for total organic carbon (TOC) and disinfection byproduct (DBP) precursors. However, some overall trends were observed. The GAC that was regenerated 5 times (R5) generally showed greater DBP precursor adsorption than the other GACs especially at the beginning of the runs. In some cases the carbon that was reactivated 12/13 times (R12 and R13) adsorbed slightly less DBP precursors than the other GACs especially in the latter part of the runs. The virgin (V) carbon performed better than the other GACs relative to DBP precursor removal in the latter part of the runs.

scholarly journals The origin and population dynamics of annually re-occurring Paratanytarsus grimmii (Diptera: Chironomidae) colonising granular activated carbon (GAC) adsorbers used in potable water treatment

2009 ◽  
Vol 99 (6) ◽  
pp. 643-651 ◽  
Author(s):  
A. Olsen ◽  
B.S.C. Leadbeater ◽  
M.E. Callow ◽  
J.B. Holden ◽  
J.S. Bale
Keyword(s):  
Population Dynamics ◽  
Activated Carbon ◽  
Potable Water ◽  
Control Measure ◽  
Granular Activated Carbon ◽  
Anaerobic Treatment ◽  
Flow Cell ◽  
Sampling Techniques ◽  
Significant Difference ◽  
Potable Water Treatment

AbstractVarious sampling techniques were employed to study the population dynamics and identify the origin of annually re-occurring infestations of Paratanytarsus grimmii in granular activated carbon (GAC) adsorbers. Larvae overwintered in all adsorbers studied and are the main source of endemic persistent infestations. Significant differences in larval densities were identified between the down-flow cell (mean of 61 larvae per 0.3 l of GAC) and the up-flow cell (mean of 14 larvae per 0.3 l of GAC) of each adsorber. Larvae were distributed uniformly with no significant difference in density at any depth through the 2-m carbon column. Application of anaerobic treatment as a control measure was ineffective at low temperatures due to a slow down in chironomid metabolism. During summer months, ovipositing females have access to all locations within the GAC adsorber building by flight, leading to immediate re-colonisation of anaerobically-treated adsorbers. Regeneration of GAC in individual cells served only to reduce larval numbers but not remove them completely, particularly when only one of the two cells is regenerated at any one time.

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