Transcription of Activated Sludge Microbiology Problems and Their Control
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1 Presented at the 20th Annual USEPA National Operator Trainers Conference Buffalo, NY, June 8, 2003. Activated Sludge Microbiology Problems AND Their Control Michael Richard, Sear-Brown Fort Collins, CO CONTENTS I. Introduction II. Microbiology Problems and Their Causes 1. Poor Floc Formation, Pin Floc and Dispersed Growth Problems 2. toxicity 3. Nitrification and Denitrification Problems 4. Nutrient Deficiency and Polysaccharide Bulking and Foaming 5. Zoogloeal Bulking and Foaming 6. Filamentous Bulking 7. Filamentous Foaming III. Practical Control Methods for Filamentous Bulking and Foaming 1.
3 are <50um in diameter. Pin floc occurs most commonly at starvation conditions -- a very low F/M and long sludge age. Chronic toxicity can also cause a pin floc condition.
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