Membrane bioreactor (MBR) is the combination of a membrane process like microfiltration or ultrafiltration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment. MBR effectively uses the membrane to intercept the active micro-organism, which greatly increase the wastewater treatment capacity and improve the produced water quality.

1. Membrane Bioreactor
(MBR) Case Study

2. • Membrane bioreactor (MBR) is now widely used for municipal
and industrial wastewater treatment, attributed to MBR process
can produce effluent of high quality enough to be discharged to
coastal, surface or brackish waterways or to be reclaimed for
urban irrigation.
• Recent technical innovation and significant membrane cost
reduction have enabled MBRs to become an established process
option to treat waste water. It it possible to operate MBR process
at higher mixed liquor suspended solids concentrations
compared to conventional settlement separation systems, thus
reducing the reactor volume to achieve the same loading rate.
About MBR

3. • Project name ： campus sewage reuse project for
Wuxi technician college
• capacity ： 1000m³/d
• Raw water type ： resort sewage
• Reuse water quality ：
Case Info
CODcr,
mg/L
BOD5,
mg/L
Ammonia-
nitrogen,
mg/L
SS ，
mg/L
Recovery rate
MBR product <40 <10 <10 5 81%

4. Process Chart

5. • The MBR process is a suspended growth activated sludge system
that utilizes microporous membranes for solid/liquid separation in
lieu of secondary clarifiers. The typical arrangement shown in
Figure 1 includes submerged membranes in the aerated portion of
the bioreactor, an anoxic zone and internal mixed liquor recycle.
• Incorporation of anaerobic zones for biological phosphorus
removal has been the focus of recent research, and there is at
least one full scale facility of this type being designed presently in
North America. As a further alternative to Figure 1, some plants
have used pressure membranes (rather than submerged
membranes) external to the bioreactor.
Process description

6. Common MBR membrane module

7. On-site photos

8. On-site photos

9. On-site photos

10. Contact info
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