![A Graphite-Metal Alloy Bushing Comes to the Rescue of a Problem Clarifier](https://cole-tpomag.imgix.net/https%3A%2F%2Fwww.tpomag.com%2Fuploads%2Fimages%2Fgraphalloy1.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=8b49203e671bd6c0a282b5024165680c)
A rake in the clarifier at the Durham treatment facility. The wastewater has been drained to enable maintenance.
A North Carolina clean-water plant was having difficulty with a rectangular primary clarifier.
The scraper flight boards and scum collector boards had gone out of sync causing the chain to jump the sprocket and fall off the guides.
An investigation found that the drive system...