MEMBRANE BIOREACTOR WASTEWATER TREATMENT
||Hydro One membrane bioreactor systems combine proven ultrafiltration
technology with biological treatment for wastewater treatment and water reuse
|Membrane Bioreactor (MBR)|
Membrane technology has advanced significantly in the past decade, for both
water purification and wastewater treatment. Today, membrane-based systems
have become the preferred technology for many potable water purification &
treatment applications: Cryptosporidium and Giardia control, color or suspended
solids removal, etc.
|Most recently, the combination of membranes with the activated sludge process has redefined basic
sewage treatment, optimizing the biological treatment operation and yielding a treated effluent that is
ideal for reuse.
Two key advances in membrane technology are at the leading edge of this trend:
- Quality & bacteria-free effluent with high efficiency in removing organic & inorganic matters
- Minimum plant size with elimination of conventional element
- Stable & efficient biological process is maintained
Membranes are low-pressure driven element and available in a diverse range of forms and
configurations, with membrane pore size or molecular weight (MW) separation being the primary
characteristic of differentiation.
|Hydro One Membrane for MBR Application
The recent development of less expensive and more efficient hollow fiber membrane from Hydro One
has generated new concept in membrane filtration application.
- It is capable of separating both insoluble solids in the process fluid (bacteria, viruses, colloids and suspended
solids) as well as higher molecular weight soluble organics, where nominal pore sizes ranging from 0.1~0.01
- The Hollow Fiber Membranes are used to construct the Immersed Type MBR Membrane.
The membrane capillaries are long, flexible and extremely durable. These membranes are “clamped” into top
and bottom distribution tubes, and will be assembled into as a membrane module.
- Membranes are immersed directly into the mixed liquor of the biological reactor, reducing the entire treatment
process to a single-step operation and replacing the clarifier of a conventional plant with an ultimate barrier
for biomass control.
- Almost all systems are now based on the significantly more energy efficient, immersed, hollow-fiber
membrane, which exhibits a very large membrane surface area.
- The large surface area in contact with the process fluid allows operation at very low trans-membrane
pressures. This, in turn, reduces fouling of the membrane surface and allows for extended periods of
operation with very low maintenance.
: 40 ~ 50 µm
: 450 µm
: 0.01 ~ 0.2 µm
: 7.0 x 10-2 cm3/cm2 • S • cmHg
: 40 ~ 50%
: 120,000 kPa
: 6 ~ 9 L/M2/H
: 5 m2/module or 8 m2/module
|Characteristic of Hydro One Hollow Fiber Ultra-Filtration Membrane used in MBR application: