Why does sludge bulking affect wastewater treatment efficiency?
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This post was last edited by cdpulin on 2011-5-12 10:43. Why does sludge expand? Why does it affect the processing results? Are there any solutions and preventive measures?
Control Ph well, and increase sludge return and discharge.
Sludge bulking generally manifests in two aspects: first, the sludge load in the aerobic tank is relatively low, and the specific surface area of filaments is greater than that of flocs. When nutrients are limited and constrained, filaments with a larger specific surface area have a stronger ability to acquire substrates compared to floc microorganisms; as a result, the growth of filaments prevails in the aeration tank, leading to sludge bulking. Solution: Increase the water inflow appropriately, reduce the amount of sludge in the aerobic tank, and add more carbon, nitrogen, and phosphorus to the aerobic tank. Secondly, the sludge load in the aerobic tank is high, which can easily lead to oxygen deficiency in that tank. Under conditions of low oxygen, filamentous bacteria thrive, resulting in sludge bulking. Solution: Increase the sludge concentration and aeration volume in the aerobic tank, and appropriately reduce the water inflow volume.
Sludge bulking prevents the separation of sludge from water, which directly results in wastewater that does not meet standards. During normal operation, it is important to pay close attention to the sludge settling ratio and aeration conditions