Jellyfish Compliance with SEQ MUSIC Modelling Guidelines · MCU15/0122

     Bypass design                                                                        The pressure relief pipe height and diameter can be
                                                                                          varied to accommodate the design peak flow rate and
     The JellyFish® filter should be designed in an offline                               system driving head requirements. For these systems, the
     configuration for most catchments. All stormwater filter                             driving head is calculated as the difference in elevation
     systems will perform for a longer duration between                                   between the top of the pressure relief pipe and the invert
     required maintenance services when designed and                                      of the outlet pipe.
     applied in offline configurations. A standard offline
     configuration has an external bypass that uses an                                    When the internal bypass option is utilised, peak flow
     upstream diversion structure. The elevation difference                               rates receive membrane filtration treatment up to the
     between the top of the diversion structure and the                                   filtration design flow rate, with the balance of the peak
     JellyFish® filter outlet pipe invert should be a minimum                             flow receiving primary treatment only. In these cases,
     of 455 mm. Excess flow that overflows the diversion,                                 increased sump depth may be required to increase
     bypasses the JellyFish® filter.                                                      sediment storage capacity and to minimise re-suspension
                                                                                          of previously captured sediment at peak flow rates.
     For smaller sites an online configuration might be more
     suitable. In these cases, an optional internal bypass                                It is also possible to configure this arrangement using
     pressure relief pipe(s) can be placed in one or multiple                             a single diversion structure. Contact Humes for design
     cartridge receptacles within the JellyFish® filter.                                  assistance.




     Figure 5 – JellyFish® filter offline arrangement without diversion weir



                                                                      JellyFish® unit outlet I.L.
      Diversion chamber inlet                                         is 455 mm lower than
                                                                      I.L. of high flow bypass
                                                                      inlet
                                          w                                 Low flo
                                       flo                                            w
                                  w
                               Lo



                                                                   High flow bypass



     Bypass inlet I.L. is 455 mm
     higher than JellyFish®
     unit outlet
          Diversion chamber                      JellyFish® unit                                        Collection chamber




     Figure 6 – JellyFish® filter offline arrangement with diversion weir



                                                                      JellyFish® unit outlet I.L.
                                                                      is 455 mm lower than
      Diversion chamber inlet                                         top of weir wall

                                             w                              Low flo
                                       flo                                          w
                                   w
                                Lo



                                                                   High flow bypass


     Top of weir is 455 mm
     higher than I.L. of
     JellyFish® unit outlet
          Diversion chamber                      JellyFish® unit                                        Collection chamber



10   JellyFish® filter