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Low energy consumption vortex wave flow membrane bioreactor.

Zhiqiang Wang1, Weilong Dong1, Xiaohong Hu2

  • 1School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|November 17, 2017
PubMed
Summary
This summary is machine-generated.

A novel vortex wave flow Membrane Bioreactor (MBR) significantly reduces energy consumption and membrane fouling. This innovative MBR system demonstrates high efficiency in treating domestic wastewater, offering a sustainable solution.

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Bioreactor Design

Background:

  • Conventional Membrane Bioreactors (MBRs) face challenges with high energy consumption and membrane fouling.
  • Improving MBR efficiency is crucial for sustainable wastewater treatment.

Purpose of the Study:

  • To develop and evaluate a low energy consumption vortex wave flow MBR.
  • To assess the performance of this MBR in treating domestic wastewater.
  • To compare its energy efficiency against conventional MBRs.

Main Methods:

  • Exploited a vortex wave flow technique combined with biofilm and membrane filtration processes.
  • Operated the MBR system for 30 days treating domestic wastewater.
  • Analyzed membrane flux, pollutant removal efficiency, and energy consumption.

Main Results:

  • Vortex wave flow state achieved at Reynolds number (Re) between 450 and 1,050.
  • Slower membrane flux decline observed in vortex wave flow compared to laminar and turbulent states.
  • CODcr and NH3-N removal efficiencies of 82% and 98%, respectively.
  • Permeate quality met urban miscellaneous water consumption standards (GB/T 18920-2002).
  • Average energy consumption was 1.90 ± 0.55 kWh/m³ (permeate), approximately two-thirds of conventional MBRs.

Conclusions:

  • The vortex wave flow MBR effectively reduces energy consumption and membrane fouling.
  • This technology provides high-efficiency wastewater treatment with improved permeate quality.
  • The developed MBR system presents a more sustainable and cost-effective alternative to conventional MBRs.