MEMBRANE BIO-REACTOR WASTEWATER TREATMENT TECHNOLOGY (MBR)

1. Operating principle of MBR membrane wastewater treatment technology

MBR is an advanced wastewater treatment technology that uses a biological process combined with biomass separation using MF/UF membranes with a pore size of 0.1-0.4μm.

The biological treatment can combine anaerobic, anoxic and aerobic stages (AAO/AO), depending on the treatment requirements or on thorough removal of organic matter through the two nutrients (N, P).

2. Advantages of MBR membrane wastewater treatment technology

• MBR works with a long sludge retention time, high MLSS concentration and low F/M ratio.
• Treated water quality does not depend on the settleability of the sludge.
• MBR achieves higher nitrification than the conventional activated sludge process because the bacteria have more time to carry out nitrification (long SRT, low F/M).
• The sludge flocs in MBR are small, allowing greater exchange of nutrients and oxygen.
• The presence of the MBR membrane prevents nitrifying microorganisms from being washed out when SRT and HRT are short.
• MBR produces little sludge.
• The MBR process can handle a higher pollutant load (2.5-3 times that of CAS).
• Reduces the treatment area of the whole system by up to 50% compared with the conventional process.
• Eliminates many treatment steps of CAS technology, such as secondary settling, sludge collection or other measures to remove BOD and SS.
• High microbial removal efficiency, minimising the risk of contamination, with no disinfection chemicals used.
• Lower energy consumption.
• Effluent quality meets Standard A and can be reused for many purposes such as aquaculture and floor washing…
• The MBR membrane has clear advantages over other technologies in terms of treatment footprint.

3. Disadvantages of MBR membrane wastewater treatment technology

• Higher initial investment and operating costs. Poor membrane quality can cause membrane clogging.
• Membrane cleaning makes operation more complex and requires skilled operators if no automatic cleaning step is used (whether by air scouring or by liquid chemicals).

Read more

MBR membrane technology: https://ngoenvironment.com/en/tin-tuc-n5-wastewater-treatment-technologies-differences-between-membrane-types-d53.html

Businesses interested in wastewater treatment solutions using MBR membranes are welcome to contact NGO on +84 24 7300 0890 or by email office@8ngo.com for direct consultation.

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