Jellyfish Compliance with SEQ MUSIC Modelling Guidelines · MCU15/0122

    System components                                              • Filter cartridges are designated as either high-flow or
                                                                     draindown cartridges, depending on their location in
    The JellyFish® filter is comprised of several structural and     the cartridge deck. High-flow cartridges placed within
    functional components:                                           the backwash pool are automatically backwashed after
                                                                     each storm event.
    • A cylindrical precast concrete structure which is
      available in a range of diameters and depths that            • Draindown cartridges located outside the backwash
      serves as a vessel providing structural support                pool facilitate the draindown of the backwash
      for a 50 year design life and provides storage for             pool. The design flow rate (2.5 L/s) of a draindown
      accumulated filtered pollutants.                               cartridge is controlled by the lid orifice. The lower
                                                                     design flow rate of the draindown cartridge ensures
    • A rigid high-strength fibreglass cartridge deck
                                                                     the membranes last for longer periods between
      separates the vessel into a lower chamber and upper
                                                                     scheduled maintenance.
      chamber. This houses the filter cartridges, provides
      a surface and flow path for treated water to the             • Cartridge lids are fastened into the deck to securely
      effluent pipe, and provides containment of oil and             anchor the filter cartridges. The lids are removable to
      other hydrocarbons below the deck and also provides            allow manual rinsing and replacement of the filter
      a platform for maintenance personnel to safely service         cartridges when required. Cartridge lids contain a
      the filter cartridges.                                         flow control orifice that is specifically sized for use
                                                                     with high-flow and draindown cartridges. Blank lids
    • The lower chamber provides storage for pollutant
                                                                     have no orifice and are used to cover unoccupied deck
      separation and membrane filtration.
                                                                     apertures in systems that do not use the full rated flow
    • The upper chamber provides adequate clearance for              capacity of the system.
      inspection and maintenance.
                                                                   • A rigid fibreglass backwash pool weir extends
    • A rigid high-strength fibreglass Maintenance Access            150 mm above the cartridge deck and encloses the
      Wall (MAW) attenuates influent water velocity and              high-flow cartridges. During inflow, filtered water
      directs flow into the lower chamber through a large            leaving the high-flow cartridges forms a pool inside
      opening in the cartridge deck. In addition, it provides        the weir. When the water level in the pool exceeds
      storage for floatable pollutants. It also serves as an         the weir height it overflows and spills to the cartridge
      inspection and maintenance access point.                       deck where it then flows to the outlet pipe. As the

    • JellyFish® membrane filtration cartridges are secured          inflow event subsides and pressure decreases, water

      to the deck by the cartridge lids. Each filter cartridge       in the backwash pool reverses flow direction and

      consists of multiple membrane filter tentacles, which          automatically backwashes the high-flow cartridges,

      treat the stormwater by filtering out fine suspended           cleaning the membrane surfaces. Water in the lower

      particulates (TSS) and particulate-bound pollutants on         chamber (below deck) is displaced through the

      the membrane of each tentacle. Filtered water passes           draindown cartridges.

      through the membranes, up the centre tube of each              This self-cleaning mechanism may occur multiple
      tentacle and exits through the top.                            times during a single storm event as rainfall/runoff
                                                                     intensities rise and fall, thereby significantly
                                                                     extending the service life of the cartridges and the
                                                                     maintenance interval.




2   JellyFish® filter