Ch5_4 attached growth

Ch5_4 attached growth - AttachedGrowthProcesses...

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    Attached Growth Processes What is attached growth? Plastic Carrier Bacterial layer  attached onto the  carrier surface Air supply Total Surface Area of the Carrier is very important (Metcalf & Eddy, 1991)
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    Features of Attached Growth Compared with Suspended Growth Bacterial layer attaches and grows onto the carrier  surface  (high biomass concentration ). Diversified microbial population. Much simpler operation than the suspended growth. Less excess sludge produced (Y = 0.1-0.3). Not easily affected by toxic substances Removal efficiency and capacity is smaller than the  suspended growth system. Mass transfer limiting processes. Biofilm is detached from support media sometimes.
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    Mechanism of Pollutant Removal by  Attached Growth (Biofilm) O 2 Carrier Anaerobic zone Aerobic zone BOD (Prevy et al., 1985)
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  Typical Attached Growth Processes 1 st  
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Ch5_4 attached growth - AttachedGrowthProcesses...

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