Hi Arun, As all the ...

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Hi Arun,

As all the biological treatment, the questions is how much BOD and NH4 you have to treat. The best primary treatment you have, the less MBBR you need. SS play a big role in the MBBR efficiency. It is important to remove a important part of it. Then, the question is : what is the regulation you must comply with. If you need a denitrification, it costs more. 

After the MBBR, I recommend you a DAF, because the sludges are light and small.