Working with What You Have: Optimizing Secondary Treatment Performance in Existing Plants

Stress Testing of a Variable Secondary Clarifier Inlet Structure

Thursday, April 19
11:10 AM - 11:35 AM
Location: Meeting Room 313, Sacramento Convention Center

SWRCB Wastewater: .05 CEU

CWEA: .5 Contact Hours

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

The variable inlet structure (Hydrgrav Adapt) for secondary clarifiers is an emerging technology that has proven to produce reuse quality effluent (< 2 ntu) at dry weather flows. This presentation will introduce the variable inlet technology, including some case studies, and a detailed account of the stress test performance.

Learner Outcomes:

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

Mario Benisch

Process Engineer


- 1998: Graduated from University of Stuttgart, Germany with MS in Environmental Engineering
- Since 1998 with HDR in Portland OR
- Now senior wastewater process engineer with focus on nutrient removal and recovery, biosolids, dewatering, resource recovery etc
- This is all that needs to be said or known. Don;t waste preceouos presentation time with I'm-so-aweseom-run-on-introductions


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Cori Burnett

Grade V Water Resource Recovery Facility Operator
City of San Luis Obispo


Hi I am Cori Burnett - I am a Grade V Wastewater Treatment Plant Operator at the City of San Luis Obispo and have an Environmental Engineering degree from Cal Poly San Luis Obispo. I am excited to help bridge the gap between operations and engineering to help optimize facilities to protect the valuable resource of one water.


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Stress Testing of a Variable Secondary Clarifier Inlet Structure

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