31/08/2026
๐ Sludge Recycle: A Small Process Step with a Big Role in STP Performance
In an STP, returning settled sludge from the secondary clarifier to the aeration tank helps maintain the required biomass concentration and supports stable biological treatment.
Key points to monitor:
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Sludge recycle flow
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MLSS levels
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Dissolved oxygen (DO)
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Sludge blanket level
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Return sludge line and pump condition
Proper sludge recycling can help maintain process stability and improve day-to-day STP operation.
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