Dear Iman,   Theoretically the activated sludge in this A2O process is used to give an extra power to the exixting activated sludge to take the P.   Now the media used in MBBR is used to attache the bacterial and give a high solids retention time (SRT), and as a consequence reduce the volume of the reactor providing benefits in terms of stability and cost-effectiveness. Then we can think that a wider range of pollutants can be removed due to the variety of the microrganism livin in the media.   Then we can think that the process can have a better performance if you use an MBBR media, and maybe depending on your removal requirement, you could use less RAS, but defitiviely I dont recommend you complete eliminate the RAS because you will need the same bacterial cultures passing thru the varioius steps of the process. Better even if you use a pilot test to look for the best set point for your process.   Regards,   Orlando D. Gutiérrez Coronado

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Dear Iman,

 

Theoretically the activated sludge in this A2O process is used to give an extra power to the exixting activated sludge to take the P.

 

Now the media used in MBBR is used to attache the bacterial and give a high solids retention time (SRT), and as a consequence reduce the volume of the reactor providing benefits in terms of stability and cost-effectiveness. Then we can think that a wider range of pollutants can be removed due to the variety of the microrganism livin in the media.

 

Then we can think that the process can have a better performance if you use an MBBR media, and maybe depending on your removal requirement, you could use less RAS, but defitiviely I dont recommend you complete eliminate the RAS because you will need the same bacterial cultures passing thru the varioius steps of the process.

Better even if you use a pilot test to look for the best set point for your process.

 

Regards,

 

Orlando D. Gutiérrez Coronado