Written by Mark Radford
Effluent outfalls typically incorporate multiport diffusers that discharge effluent over a wide area through numerous ports, rather than through one large open-ended pipe. Providing a cost-effective means of achieving high initial dilution, multiport diffusers minimise the impact of municipal and industrial discharges on the environment. The most important item on an effluent diffuser system for controlling the hydraulics and initial dilution are the ports. A diffuser system’s ports ensure that peak flows can be discharged with a limited amount of driving head and generate high enough jet velocity to yield the required initial dilution.
Derived from Red Valve’s model, Tideflex® Diffuser hydraulic output data can be input into any Mixing Zone Model, including CORMIX, Visual Plumes and CFD, for near field and far field dilution modelling. Red Valve engineers partnered with MIXZON, Inc., developers of CORMIX, to incorporate the hydraulic characteristics of various conventional and Wide Bill Tideflex® Diffusers into the CorHyd module of CORMIX.
Each diffuser system is unique. Red Valve has conducted extensive hydraulic tests on Tideflex® Diffuser Nozzles from 2” (50 mm) to 48” (1200 mm) and has developed an exclusive computer model that Red Valve engineers run to assist in the design of multiport diffusers. The model output includes data and graphs of headloss, total headloss, jet velocity and effective diameter. This data is compared to conventional fixed-diameter orifices to illustrate the hydraulic advantages of Tideflex® Nozzles. For a Diffuser Nozzle Hydraulic Analysis, please download and complete the application data form
Small 50mm Tidefex Diffuser Nozzle delivering optimal mixing of distillery treated effluent in Scotland