WEFTEC 2014 Innovation: Dewatering Process Runs at Net Zero Energy

WEFTEC 2014 Innovation: Dewatering Process Runs at Net Zero Energy

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Editor's Note: Innovation was a big theme at WEFTEC 2014. We'll be featuring a few of the new and better technologies found in the exhibit hall at the Morial Convention Center in New Orleans. Watch each day for the Innovation logo to learn more about new products displayed at the clean-water industry’s flagship exhibition and conference.

Cambi introduced the SolidStream process, designed to increase the dewaterability of biosolids to 60 to 75 percent dry solids.

The process starts by degrading extracellular polymeric substances (EPS), which can bind up to 80 percent of the water in liquid biosolids. The degraded EPS and other cellular material are returned to anaerobic digesters as solubilized and particulate material in the dewatering centrate. The heated solids are then dewatered in a centrifuge, requiring no polymer.

The final step consists of cooling and further drying the product, which is pathogen-free and qualifies as Class A. The company says the energy contained in the hot centrate, combined with additional biogas production enabled by the process, often exceeds the energy demand of the process itself.

For more information, visit www.cambi.com.


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