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Related Experiment Videos

Temperature Enhanced Backwash.

Benedikt M Aumeier1, Süleyman Yüce1, Matthias Wessling2

  • 1RWTH Aachen University, Chemical Process Engineering, Forckenbeckstrasse 51, 52074 Aachen, Germany.

Water Research
|May 29, 2018
PubMed
Summary
This summary is machine-generated.

Temperature Enhanced Backwash uses steam and pressure to clean membranes for decentralized water treatment, improving flux and reducing reliance on consistent power. This method offers effective fouling removal for sustainable water purification.

Keywords:
Decentralized drinking water treatmentFouling mitigationIntermittent power supplyMembrane cleaning methodRe-contamination preventionUltrafiltration

Related Experiment Videos

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Membrane Science

Background:

  • Decentralized drinking water treatment faces challenges with power supply, consumables, and spare parts.
  • Gravity-driven dead-end ultrafiltration is suitable for surface water with high suspended solids but requires effective membrane cleaning.
  • Consistent membrane performance necessitates regular disinfection and cleaning to maintain high flux.

Purpose of the Study:

  • To introduce and evaluate a novel Temperature Enhanced Backwash (TEB) process for decentralized water production.
  • To address the limitations of intermittent power supply in maintaining effective membrane cleaning.
  • To demonstrate the efficacy of TEB in managing membrane fouling and ensuring long-term operational stability.

Main Methods:

  • Developed and mathematically described the Temperature Enhanced Backwash process.
  • Utilized elevated temperatures and steam pressure for membrane backwashing.
  • Conducted experimental validation using silica nanoparticles, humic acid, and river water.

Main Results:

  • TEB involves backwashing membranes at elevated temperatures and steam pressures.
  • Mathematical modeling indicated predominant liquid phase filling of membrane pores.
  • Evaporation at the membrane-fluid interface generates high-volume fluxes that shear off fouling layers.
  • Experimental results demonstrated competitive cleaning efficacy compared to mechanical backwashing.

Conclusions:

  • Temperature Enhanced Backwash is a viable method for decentralized water treatment, especially with unreliable power.
  • The process effectively removes fouling layers through steam-induced evaporation and high-volume fluxes.
  • TEB offers a sustainable solution for maintaining membrane performance in challenging environments.