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TRANSCRIPT
HELIX – Flux enhancement technology in
tubular waste water treatment membranes
Stefan Koel a *, Jens Potrecka
a Pentair X-Flow, Enschede/The Netherlands
*Corresponding author: email, telephone
Abstract:
Tubular ultrafiltration membranes are used in the separations of high solid streams, e.g. sludge from bioreactors. Due to the fouling behavior of the sludge and the application of crossflow, these membranes suffer from concentration polarization and fouling.
To overcome fouling and to increase the mass transfer, the smooth surface of the polymeric membrane has been structured with a ridge, helically wound along the wall. This macroscopic surface modification has led to a drastic improvement of performance. The increased level of turbulence at the membrane wall generates a substantially thinner boundary layer which has improved the fluxes by a factor of two and decreased the energy consumption by half in certain MBR applications. Since the ridge is from the active membrane material itself, the area participating in filtration is not restricted and does not attract deposition of fouling. See the picture below for a schematic overview.
The technology has been tested in pilot as well as full scale installations around the world with consistently higher performance to unmodified membranes. Results of the pilot as well as full scale installations will be shown and significantly improved energy balances for the waste water treatment plants are investigated resulting in comparable or even better performance than conventional or other membrane treatment processes.
Other new features in the MBR tubular membranes will be shown as well. These developments will be in the field of module design, process conditions and tubular membrane production.
The HELIX technology has been patented by Pentair X-Flow.
Keywords: HELIX, MBR, energy saving, flux enhancement, tubular membranes
Presenting author detailsFull name: Stefan KoelEmail: [email protected] number: 0031 534287389Affiliation: Pentair X-Flow, Enschede/The NetherlandsTopic name / number: HELIX – Flux enhancement technology intubular waste water treatment membranesCategory preferred: (Oral presentation / Poster presentation)Would you like to be considered for a presentation award (Student and ECR only, please check eligibility on www.imstec2020.com)?: Yes / No