In-Situ Sludge Reduction in Lagoons

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This webinar will discuss methods of reducing lagoon sludge in place to mitigate the need for expensive and disruptive dredging. It will cover the problems excess sludge accumulation can cause; how to measure sludge and calculate sludge volume; low-tech methods of in-situ sludge reduction; bioaugmentation; and how aeration and mixing can provide sludge reduction benefits while improving energy efficiency.

Attendees will learn about the role of the sludge blanket in wastewater lagoons, the problems excess sludge can cause, and methods to remove or reduce the sludge to improve treatment lagoon function.

0:00 Introduction
4:15 Sludge Basics
8:30 Problems with Excess Sludge
12:50 Sludge Biology
16:20 Performing a Sludge Survey
24:15 Estimating Sludge Removal
27:35 Sludge Removal Options
28:00 Dredging
33:25 Offline Removal
34:50 In-Situ Sludge Removal Overview
36:15 Bioaugmentation
37:45 Aeration and Mixing
40:50 Case Study:  Food Plant
41:00 Background
42:40 Pilot Design
44:10 Sludge Survey Layout
45:00 Sludge Survey Methods
46:10 Sludge Survey Results
52:35 Conclusions
54:15 Questions and Answers

Preapproved for 1 continuing education hour in Alaska, Arizona, California, Idaho, Illinois, Indiana, Louisiana, Maine, Montana, New Hampshire, New Mexico, Ohio, South Dakota, Vermont, Washington, and Wyoming. Likely accepted in states that do not preapprove CEUs, such as Alabama and South Carolina. Eligible for PDH credit in all states.

About the instructor

Julie Hartwig is a lagoon specialist for Triplepoint Environmental. She has a BS in Civil Engineering from the University of Illinois at Urbana-Champaign, a Master’s in Environmental Engineering from Penn State University, and extensive practical experience working with municipal and industrial wastewater treatment facilities. Julie has presented on lagoon topics at a number of regional conferences.