Transcription of Activated Sludge Microbiology Problems and Their Control
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Activated Sludge Microbiology Problems and Their Control
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.
activated sludge floc respire using nitrate in place of free oxygen when it is lacking and release nitrogen gas as a by-product. This gas is only slightly soluble in water and small nitrogen gas bubbles form in the activated sludge and cause sludge blanket flotation in the final clarifier. An
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