Reference Library
Potential cause: High SRT
High Sludge Retention Time (SRT) Values: SRT is a calculation of the theoretical time the average microbe remains in a biological wastewater treatment process. There are two recognized filamentous bacteria morphotypes that are correlated with elevated SRT values. Note that low food to microorganism ratio (low F/M) often but does not always accompany high SRT.
or
Shape:
N/A
Septa:
N/A
Sulfur Granules:
N/A
Sheath:
N/A
Branching:
N/A
Description
Groupings of four cell clustered together. Associated with organic acid substrate, commonly favoring higher SRT (sludge retention time) values.
Shape:
Rectangles
Septa:
Yes - often difficult to see
Sulfur Granules:
No
Sheath:
Yes
Branching:
Yes
Description
Often forms "bundles/twisted ropes". Often has attached growth.
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Shape:
Square
Septa:
Yes - Visible
Sulfur Granules:
No
Sheath:
Yes
Branching:
Yes
Description
“Grainy” appearance. Often has attached growth.
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