1.The sludge we drain is 5 mins every 30 mins, and now we plan to lower the drain time, to increase the sludge age. 2.we pump the ​​sludge from ​​other system (​​which is good ​​to NH3-N ​​reduction) as ​​usually, but ​​this time  ​​the NH3-N ​​reduction ​rate  is ​​poor to improve ​​.

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1.The sludge we drain is 5 mins every 30 mins, and now we plan to lower the drain time, to increase the sludge age.

2.we pump the ​​sludge from ​​other system (​​which is good ​​to NH3-N ​​reduction) as ​​usually, but ​​this time  ​​the NH3-N ​​reduction ​rate  is ​​poor to improve ​​.