MBR Systems

MBR filtration principles and short history:

The technology of membrane separation of activated sludge, commonly referred to as "membrane bioreactor" (MBR), is the combination of activated sludge treatment together with a separation of the biological sludge by micro-filtration or ultra-filtration membranes with pore size of typically 10 nm to 0.5µm to produce the particle-free effluent. The latter step replaces the final clarifiers used in conventional activated sludge treatment, which achieves solid separation by gravity only.

The physical barrier imposed by the membrane system provides complete disinfection of the treated effluent. It also enables operation at higher sludge concentrations (typically up to 20 g/L instead of max. 6 g/L with conventional systems), and therefore permits to reduce the required footprint and/or sludge production.

After initial development started in the late 60s, the MBR technology for wastewater treatment experienced rapid development from the early 1990's onwards. The first systems commercialised in the 70's and 80's were based on what have come to be known as side stream configurations, i.e. the membrane separation step was employed in an external sludge recirculation loop, mainly with in-to-out flow through organic or ceramic tubular membranes.

In the early 90's, the Japanese Government launched an ambitious 6-year R&D project which led to a major technological and industrial breakthrough of the MBR process: the conception of membrane systems with low pressure (out-to-in permeate) and membrane aeration to reduce fouling. This paved the way towards a significant reduction of capital and operation costs, due to the reduction and simplification of equipment.

Haith CWIUK MBR Systems

The Haith / Clean Water International (UK) (CWIUK ) philosophy is to provide pre -fabricated packaged MBR systems.
Incorporating Haith`s expertise in manufacturing a wide range of industrial equipment combined with CWIUK`s designs and unique low pressure, low energy aerated side stream membrane systems. Due to the unique design of our MBR systems future expansion is readily achievable. The Haith CWIUK MBR systems are delivered pre manufactured in an option of materials and come skid mounted for easy transport and installation. The side stream membrane plant is enclosed in an insulated ISO container along with full PLC control.
Our unique approach minimises site disruption caused by major construction and can also avoid many planning consent issues.  Our Pricing structure is simple and straightforward, giving the client the option to take control of costs.

Advantages of the Haith CWIUK MBR system:

  • Membrane separation of the biomass in the range of to 0.1 to 0.01µm, ensuring complete viral and bacterial disinfection.
  • Fully automated PLC system with optional GPRS communication facility.
  • Individual modules can be monitored for water quality and shut down if membrane failure occurs, eliminating the need to shut down the complete system.
  • If membrane failure should occur in a single cartridge this can be quickly isolated and replaced.
  • The cleaning of each module is an automatic process and is done individually, it does not disrupt the discharge and therefore extra MBR capacity is not required.
  • Any chemical CIP is undertaken in situ and does not disrupt the discharge, eliminating the need to completely shut down or drain down the MBR.
  • Low power consumption of membrane unit, typically 240v 1.5KWA