How'd that Get in There? Building a Better Headworks

A New Approach for Classifying Grit

Wednesday, April 18
3:10 PM - 4:00 PM
Location: Meeting Room 313, Sacramento Convention Center

SWRCB Wastewater: 0.1 CEU

CWEA: 1 Contact Hour

Practice Area: Professional Challenge Area: Plant Operations – Challenges and Opportunities

Grit has been classified based on particle size or mesh size distribution despite that fact that most important characteristic of the grit is its settling velocity. Grit settling velocity has been debated over a number of years. Yet, there is no accurate way of measuring grit settling velocity. In this presentation, you will learn a new methodology of characterizing the grit based on particle settling velocities. Also, you learn about the new settling velocity column.

Learner Outcomes:

Level: Intermediate; working knowledge of subject matter / journeyman level staff


Hany Gerges

Director of optimization


Dr. Hany Gerges has nearly three decades of experience in waste water engineering, with specialized expertise in Physical chemical processes hydraulic analysis, optimization and modeling, including computational fluid dynamics modeling (CFD modeling). His experience has included evaluation, optimization, and design of more than 65 waste water treatment plants worldwide. Hany is one of the lead authors of WEF recent manual for Grit Sampling and Characterization.


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David Bachtel



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A New Approach for Classifying Grit

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