ECOS
ECOS
Water
Waste
Wastewater
Resource Efficiency
Licences & Permits

Wastewater: Activated Sludge – Bulking

Sludge bulking may be noted through visual observation: Failure of sludge solids to settle in the final clarifier Carryover of solids resulting in high effluent suspended solids Presence of filamentous bacteria (microscopic examination) Increased SVI and disimproved settleability Clear supernatant liquor after prolonged settling Principal causes: Underloading  Dissolved oxygen too low Nutrient deficiency A correction...

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