Marshall Environmental Training and Consulting Group, Inc., (METC Group)

Aerated Stabilization Basin Operations Training Webinar - Sep 22 and 24

This webinar is for operators, technicians, engineers and managers of aerated stabilization basins. Biological treatment concepts for ASBs will be reviewed. Effluent treatment plant microbiology (filamentous and non-filamentous) will be related to ASB performance. Management and operation of the key control elements, aeration and nutrients for ASBs will be discussed. ASB troubleshooting will be discussed with problems and possible solutions for each problem. It is operations oriented providing practical information for day-to-day operation. The webinar will presented over four 2-hr sessions over 2 different days. CEUs will be awarded (0.8).

Review of Wastewater Treatment

  • 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

Primary Treatment

  • Solids Capture and Efficiency
  • Negative Impacts from Priamry on Secondary

Overview of Biological Treatment

  • ·Overview of ASB Processes
  • Bacterial growth - metabolism, respiration, growth phases
  • Growth Pressures: Temp., pH, dissolved oxygen, nutrients, toxics, hydraulic loading

Microscopic Evaluation of ASBs

  • Floc Structure
  • Filament Abundance
  • Protozoa and Other higher Life Forms

Aeration & Dissolved Oxygen Control

  • Types of Aeration
  • Monitoring, D.O. probes
  • Mixing
  • Causes of D.O. deficiency

Nitrogen & Phosphorus Management

  • Sources of nutrients, nutrient requirements
  • Monitoring residuals
  • Nutrient deficiency
  • Nitrification/denitrification

Managing ASB solids

  • Wastewater characteristics
  • ASB Design Impact on Solids
  • Sludge Removal and Reduction

Sludge Quality Problems & Control

  • Poor floc formation
  • Foaming
  • Toxicity
  • Filamentous bulking (low D.O., low F/M, nutrient deficiency, septic/sulfide)
  • Controlling bulking problems

ASB Troubleshooting

  • High Effluent BOD and TSS
  • Effluent toxicity
  • High Effluent ammonia
  • Foaming
  • Rapid Sludge Accumulation

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