Dear Dhiresh, You will need ...

Dear Dhiresh,

You will need a biological treatment to remove most of the BOD to the desired value, and depending on the treatment process and the HRT you could reach the COD too.

If the COD removal can not reach the COD value, you could use an AOP to obtain it.

If you need remove the dissolved solids (conductivity), then you will need other extra process as the RO, but been sure you have less than the maximun COD and BOD required values to send it to the inlet of the RO process.

The biological treatment can be anaerobic or aerobic, but if you use any anerobic step you will need at less one aerobic step to polish the BOD and COD before the effluent.

The anaerobic system does not use energy (or use just few), but is more complex to start up, operare or recover it after a shock, and you could need special skilled employees or at less a contractor or any other company to operate it.

The aerobic system in special MBBR use energy, but is a less complex system that can be used in this application after the anerobic system,  or as the total biologic system.

If you will not use the anaerobic system, the configuration calculations and size of the MBBR will chance.

If you want use the anaerobic system, as an example you could think in the following process:

Biological Treatment (Anaerobic)>>Biological Treatment (MBBR1)>>Biological Treatment (MBBR2)>>Microfiltration>>AOP(Ozone just to reach the removal value if needed)>>RO (If needed).

More simple is more easy.

Regards,

Orlando D. Gutiérrez Coronado