Hi Thanikachalamurthi ...

Published April 19, 2018 18:33 by Bruno Peeters, managing director at Model Engineering

As to answer your question, there is no minimum water flow. Only the kind and size of treatment will be different.

For small flow rates and pollution loads, one can use a zero energy, gravity flow water plant root system (floating or fixed) after a fine screen and settling tank. If the soluble organic load would be higher, then fine bubble aeration shall be added.