ASCE will be sunsetting the Civil Engineering Database (CEDB) in the coming months. We encourage you to start using the ASCE Library to perform content searches. In the ASCE Library, you can save your search results as well as receive email content alerts when new content relevant to your area of interest is published. Try it out today at https://ascelibrary.org.

 

Is There Grit in Your Sludge?

by George E. Wilson, (M.ASCE), Pres.; Eutek Systems, Carmichael, Calif.,


Serial Information: Civil Engineering—ASCE, 1985, Vol. 55, Issue 4, Pg. 61-63


Document Type: Feature article

Abstract:

Getting the grit out of municipal sludge can lower the total cost of operating a wastewater plant. Grit escalates maintenance costs and abrasive-laden sludge is costly to dispose of. Because conventional grit control systems remove only abrasives larger than 200-300 microns sand, 90-95% of the abrasives that enter a wastewater plant end up in the sludge. A new system can now eliminate all abrasives, reducing dry solids by 25% and O&M costs for sludge treatment more than 50%. The new unit is based on free vortex accelerated boundary layer grit collection and classification. It imposes an acceleration field within a boundary layer on settleable particles contained in wastewater, separating particles of different densities that have the same settling velocity in water.

Subject Headings: Sludge | Erosion | Particle velocity | Benefit cost ratios | Wastewater treatment plants | Wastewater management | Municipal wastewater

Services: Buy this book/Buy this article

 

Return to search