The sedimentation tank mud surface is too high, and the effluent suspended solids rise

- Jul 09, 2019-

Cause:


If the load is too high, the decomposition of organic matter does not completely affect the sludge sedimentation performance, and the sedimentation effect is deteriorated;


The load is too low, the sludge lacks nutrition, and the resistance to low-nutrient bacteria increases the flocculation performance.


The sludge is older, the sludge concentration in the system is too high and the sludge structure is loose and not easy to settle;


When the water temperature is too high, the small molecules of organic matter increase, and the bacterial gum group adsorbs too much organic matter to cause sludge deflocmentation.



Solution:


Reduce the load to reduce the total amount of influent COD, and increase the dissolved oxygen to gradually restore the sludge performance;


Increase the amount of water in the appropriate range, maintain a high dissolved oxygen state for a period of time to inhibit the continued increase of low-nutrient bacteria;


Increase the excess sludge discharge and control the system sludge concentration to a reasonable range;


Reduce the water temperature in the aeration tank, control the dissolved oxygen level, and the sludge can return to normal after a period of time.