• AWWA ACE95094
Provide PDF Format

Learn More

AWWA ACE95094

  • A Study of the Active Biological Layer in the Slow Sand Filter Using an Oxygen Microelectrode
  • Conference Proceeding by American Water Works Association, 01/01/1995
  • Publisher: AWWA

$12.00$24.00


This paper describes a study to develop the analytical tools and to make preliminary observations needed to help end the debate over the importance of the filter cake that forms on the surface of the sand media and focuses on the sand surface where the biologically active schmutzdecke is located. Some authors suggest that the deeper region of the sand media is where significant adsorption and biodegradation occur and the filter cake is merely an extraneous part of slow sand filtration. Other authors have clearly demonstrated the top three inches of the sand media is where almost all of the purification occurs. These analyses of filter cake characteristics will allow future investigations to identify the mechanisms of removal of influent pathogens, suspended solids and organics under different operating conditions, including influent water temperature, sand characteristics and loading rates.

Related Products

AWWA 51866

AWWA 51866

Show Me the Savings! Do New Homes Use Less Water?..

$12.00 $24.00

AWWA DSS69201

AWWA DSS69201

A Time-Saving Method for Getting More Data Out of Your Tracer Studies..

$12.00 $24.00

AWWA ACE92136

AWWA ACE92136

Biodegradability of Natural Organic Matter: A Comparison of Methods (BDOC and AOC) and Correlations..

$12.00 $24.00

AWWA ACE99442

AWWA ACE99442

From an Anonymous Supplier to a Well-Known Supplier: From "Taken for Granted" to "Bra..

$12.00 $24.00