Sludge's Re-Treat
The Shreveport, La., water treatment plant was losing up to 25% of the water it pumped into filter backwashing and sludge. Demopulos & Ferguson Associates (DFA), Shreveport, designed...

Comparison of Water Backwash and Brush Cleaning Systems for Vertical Panel Fish Screens

Comparison of Water Backwash and Brush Cleaning Systems for Vertical Panel Fish Screens
Vertical plate fish screens have been installed at a number of locations within the Pacific Northwest The vertical orientation of the screen panels requires screen cleaning systems designed...

Detachment of Humics-Coated Colloids from Fluidized Beds

Zebra Mussel Control with Backwash Filtration

Sand Filter Backwast Pit Criticality Analysis

Filtration and Backwashing Performance of Biologically-Active Filters
Before widespread use can be made of biological filters, it is crucial to develop an understanding of the filtration and backwashing performance of these filters. Experimental results...

Invasion of the Zebra Mussels
At first glance, the zebra mussel looked like doom for freshwater users in the Great Lakes: small, hardy, incredibly prolific European mollusks with an affection for freshwater intakes...

Phosphorus Removal by Automatic Backwash Filters at Back River WWTP

Operating Experience--Fine-Mesh Traveling Screens
Start-up and operating results for a new screenhouse at the Prairie Island Nuclear Generating Plant, 50 miles (80 km) downstream from Minneapolis/St. Paul, are compared to design assumptions....

Flow Approaching Filter Washwater Troughs
A potential flow model is used to study the flow of backwash water, laden with filtered solids, in its progress from the top of the filter bed to the washwater troughs above the filter....

Economic Analysis of Granular-Bed Filtration
There is a tradeoff relationship between the capital cost of the filters and the operating costs associated with backwashing. In general, as the size and, thus, the cost of the filter...

Declining-Rate Versus Constant-Rate Filtration
The study conclusively showed the benefits of the declining rate system. Both systems were operated at the average filtration rates at a municipal lime softening plant. The declining-rate...

Virus Concentration by Ultrafiltration
A capillary membrane ultrafiltration unit was used for the concentration of poliovirus I from a volume of 100-l tap water. Backwashing the unit with either high pH glycine buffer or beef...

Filter Backwashing by Ejector
The effectiveness of backwashing a filter has a significant impact on the performance of the subsequent filter run. Since the primary mechanism of cleaning the filter media is due to the...

Granular Filter Backwash Water Treatment

Effectiveness of Backwashing for Wastewater Filters
The use of deep granular filters in waste treatment is of growing importance. The key to long-term operating success of such filters is proper bed design and adequate bed cleaning during...

Optimum Backwashing of Sand Filters
A fundamental theoretical and experimental study of backwashing is presented showing that backwashing with water alone is an inherently weak process because of the absence of particle...

Evaluations of an Innovative Filter Backwashing System

Unstratified-Bed Filtration of Wastewater
Single, dual, and multimedia filters commonly used for wastewater treatment have a number of operational limitations associated with the stratification of the filter bed during backwash...

 

 

 

 

Return to search