Air Diffuser project, erection, commissioning

Referring to the above mentioned subject, Please send us your best technical & financial offer for the supply of Air Diffuser including erection, commissioning and handing over to the client according to the following specs :
- The tank size is Length = 16m , Width= 8m , depth = 2.9m
- The biological system is SBR ( Sequencing Batch Reactor ) .
- The daily flow is 250 m3/day .
- The COD range between 4000 mg/l to 8000 mg/l.
- The water salinity is around 25,000 mg/l
- The calculated requir