Activated Sludge Operations

Sessions dates and times (PDT) - 14 hours Total, 1.4 CEUs

Sep 9 (8 am - 10:10am, 11:10am - 1:20 pm), Sep 10 (8 am - 10:10am, 11:10am - 1:20 pm)

Sep 15 (8 am - 10:10am, 11:10am - 1:20 pm), Sep 17 (8 am - 10:10am)

Activated Sludge Outline

This course is structured for operators and managers of activated sludge plants. It is operations oriented providing practical information to use in day-to-day operations. Using a practical approach, operating plants are used to relate actual operations during the discussion on the workshop topics. Participants will apply their newly gained knowledge in solving the case history during the last day. Participants will receive an operations manual for activated sludge treatment systems.

Review of Wastewater Treatment - Sep 9

· Composition of Wastewater - types of solids, organics
· Preliminary Treatment - screening, equalization
· Primary Treatment - settleable solids vs. suspended solids removal
· Secondary Treatment - conversion of organics, solids capture
· Sludge Treatment - thickening, dewatering, disposal

Primary Treatment - Sep 9

· Solids Capture and Efficiency
· Negative Impacts from Primary on Secondary Treatment

Overview of Biological Treatment - Sep 9

· Bacterial growth - metabolism, respiration, growth phases
· F/M
· Growth Pressures: Temp., pH, dissolved oxygen, nutrients, toxics, hydraulic loading

Activated Sludge Process Control Tests - Sep 10

· Settlometer - measuring sludge settling characteristics
· Depth of blanket - determining clarifier inventory and sludge detention time
· Microscope - assessing microbial health/composition
· Oxygen uptake - assessing metabolic rates; toxicity detection; shock loads
· Process monitoring

Controlling Recycle Sludge Flow - Sep 15

· RSF strategies
· Optimizing clarifier capacity
· Controlling clarifier inventory

Controlling Waste Sludge Flow - Sep 15

· MCRT/Sludge age
· F/M
· Sludge yield
· Controlling sludge inventory
· Wasting strategies

Controlling Aeration - Sep 15

· Monitoring, D.O. probes
· Mixing
· Oxygen demand - organic, nitrification, endogenous respiration
· D.O. deficiency

Nutrient Management - Sep 17

· Nutrients - ammonia, phosphorus, various types used
&mid Nitrogen - managing considerations
&mid Nitrification/Denitrification
&mid Nutrient management plan

Troubleshooting Overview of Activated Sludge Problems - Sep 17

· Poor floc formation
· Foaming
· Rising sludge
· Toxicity
· Rapid settling, turbid effluent
· Slime bulking
· Filamentous. bulking


Rick Marshall is a registered professional engineer and Grade VII (MA) certified operator with over 43 years of experience providing servics to hundreds of municipal, pulp & paper, food and beverage, chemical and refinery treatment systems. These services include:process training, process troubleshooting, treatment system optimization, treatment plant audits, plant design reviews foroperability, and O&M documentation (O&M manuals, SOPs)

Steve Leach is owner of Leach Microbial Consulting with over 32 years of experience in wasteater biology. He has worked throughout the world with municipal, pulp & paper, food and beverage, chemical and refinery treatment systems evaluating their microbiology and relating it to plant operations.

Registration Fee: $400 USD for webinar series, normally $500 for in-person attending workshop, Group discounts available

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