The MBBR process is versatile and suitable for a variety of water treatment objectives and flow rates. See McQuarrie and Boltz (2011). In Water Environment Research. In particular, these bioreactors have been applied to site constrained facilities and as package plants.
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Generally the capacity of MBBR wastewater treatment plants is in the range from 10 m3.d-1 to approx 5,000 m3.d-1. Sop it means that for your flowrate is OK.