Powder and Bulk Engineering
Saturday, August 23, 2014
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Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
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Publication Date: 06/2002
Pages: 3
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Elbows solve wear problem

A wastewater treatment facility installs five new specially designed elbows in its lime conveying system to reduce dust leaks and downtime caused by material abrasion.

Alexandria Sanitation Authority [ASA], Alexandria, Va., operates the city's advanced wastewater treatment facility. The facility produces Class B biosolids that are used as a land-applied fertilizer in agricultural applications. One step in the treatment process -- conveying powdered lime from a storage silo to two day silos -- was proving to be a challenge for the facility. The lime eroded through the conveying system's elbows too quickly, causing dust leaks, excessive downtime, and inefficient operation.

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