Membion GmbH
Membion - MBR Technology
FromMembion GmbH
Membrane wastewater treatment plants (MBR) deliver a water quality thousands of times better from a microbial point of view compared to conventional wastewater treatment plants – with a significantly smaller footprint for the overall plant.
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Conventional wastewater treatment plant
= a biological wastewater treatment process in wastewater treatment plants consisting of:
- Pre-treatment of the raw wastewater.
- Biological stage in which microorganisms in the activated sludge are used to degrade wastewater components.
- Secondary sedimentation (clarifier) for the separation of sludge and treated wastewater by sedimentation
Novel membrane bioreactor
= combination of classical wastewater technology with membrane filters in so-called membrane bioreactors (MBR).
- Membranes are submerged in the biological stage.
- Membrane filters enable higher sludge concentrations in the activated sludge stage leading to smaller tank volumes.
- The separation of sludge and treated wastewater is achieved by the membranes – thus eliminating the need for secondary sedimentation (clarifier).
- Significantly improving water quality due to the barrier effect of the membranes.
- Improved hygienic water quality by a factor of ~ 1000.
- Reduced space requirement (approx. 50 %) due to elimination of secondary sedimentation (clarifier) and reduction of sludge tank volumes.
- Retention of problematic substances such as microplastics, pathogens & antibiotic-resistant germs.
- Reusability of the water.
- Reach for further treatment, e.g. reverse osmosis.
Previous “conventional” MBR modules have the following disadvantages:
- High energy consumption for flushing the membrane modules with air.
- Additional pre-treatment of the wastewater (up to fine screening with < 1.0 mm fine sieves) in the influent of the treatment plant in order to remove hair and fibrous compounds that can get stuck in membrane modules due to their design (clogging!).
- High space requirement for the membrane modules in some cases.In an inefficient aeration system surplus air can cause oxygen contamination in downstream denitrification processes.
- Costs for membrane replacement – membranes are wearing parts that have to be replaced after their service life has expired.
- Cleaning and maintenance effort of the membrane filters at regular intervals.