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HUBER Bioreactor Membranes VRM® |
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For outstanding effluent quality:
- No suspended solids or bacteria
- Permits reuse, e.g. for irrigation
- Reduced costs for disinfection
For plant upgrading: - Improved performance on small footprint
- For municipal and industrial applications
California Title 22 approved! |
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| Schematic Diagram of a HUBER VRM® System |
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1 aeration tank or
filtration chamber
2 permeate / effluent
3 scouring air pipes
4 rotating membrane
modules
5 rotating membrane
elements
6 fixed hollow shaft
7 rotating permeate
collector pipes
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HUBER VRM® membranes are ultra-filtration membranes with an average pore size of 0.038 microns (38 nm). The pores are smaller than colloidal particles. This is the reason why no particles do not enter and block the pores, and why regular chemical cleaning of our membranes is not required. We have installations where no chemical cleaning was needed for several years. The effluent quality of our ultra-filtration membranes complies with the most stringent requirements.
HUBER VRM® membranes are flat and rotating membranes that are submerged in aeration tanks or in adjacent filtration chambers (1). Increasing the mixed liquor (activated sludge) concentration to between 10 and 16 g/l improves the efficiency and/or capacity of existing activated sludge systems without the need for larger tanks. Subsequent clarifiers and sand filters are no longer required.
Effluent (2) is drawn by a permeate pump through the membranes and permeate collector pipes (7) and through the hollow shaft (6) of the unit. Both surfaces of every VRM plate are covered with a membrane. Four plates are stacked with defined gaps yo form a VRM module (4). Six or eight modules are arranged to form a disc-shaped VRM element (5), having a diameter of 6.5' or 10' (2 or 3 m). Up to 60 elements can be inserted into a single VRM unit. The elements rotate around shaft (6) of the unit.
A very efficient air scouring system is provided to prevent fouling and to maintain a high average flux of up to 25 GFD (40 l/m2/h) through the membranes. The scouring air flow and the rotation of the membranes generate a high cross-flow velocity in the gaps between the plates and on the membrane surfaces. The scouring air is fed through a pair of scouring air pipes (3) that are installed parallel to the shaft (6). The scouring air is introduced at only about half the water depth which reduces air pressure and the blower's power consumption. The scouring air is diffused as coarse bubbles rising from the shaft. Only a segment of the membranes is scoured at a time, but with high turbulence and intensity, as they slowly rotate through their 12 o' clock position. The entire membrane surface is scoured 2 to 3 times per minute.
VRM® System is „California Title 22“ - approved !
After having passed all tests and approval of the engineering company’s official report by the State of California the VRM System may now officially be referred to as “California Title 22 approved”. Title 22 is a far-reaching standard for water recycling, which was originally used in California and is now applied by more and more US states and also by other countries all over the world as a criteria of high-quality!
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Huber Technology Inc., 9805 North Cross Center Court; Suite H, Huntersville, NC 28078
Phone: (704) 949-1010, Fax: (704) 949-1020, email: huber@hhusa.net |
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