Loading patent…
AssigneeIndustrial Technology Research Institute
InventorsWang-Kuan Chang, Min-Chao Chang, Ren-Yang Horng, Hsin Shao
Estimating the term…
A submerged membrane bioreactor includes a tank containing a mixed liquor having microorganism; and a filtration module immersed in the mixed liquor and having a permeate side in fluid communication with the mixed liquor only through the filtration module. The filtration module includes a porous support having a first surface forming the permeate side and a second surface opposing to the first surface; and a non-woven fabric membrane covering the second surface and having a thickness of 0.1-2 mm and a pore size of 0.2-100 μm.
A membrane bioreactor comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
The material being fibrous: of synthetic origin
Membrane bioreactor systems: submerged membrane bioreactors
Technologies for wastewater treatment: biological treatment of water, waste water, or sewage
Separation
Term end not estimated
The present invention relates to a submerged membrane bioreactor, and particularly to a non-woven fabric membrane filtration module disposed therein.
In an activated sludge process for treating wastewater, the use of an ultrafiltration (UF) or microfiltration (MF) unit in a solid/liquid separation membrane bioreactor to replace the sedimentation tank/sand filtration tank started in 1969. In comparison with the conventional activated sludge process, the solid/liquid separation membrane biological treatment technique has many technical advantages, e.g. a long sludge retention time, capable of treating wastewater with a high concentration variation, without the need of using a sedimentation unit (less footprint), etc. Up to now, there are at least 500 solid/liquid separation membrane biological treatment plants being operated world-widely. Most of the membrane materials used by the plants are microporous polymeric materials (with a pore size of 0.1˜10 μm) or inorganic ceramic materials. Typical examples include U.S. Pat. No. 5,204,001, which discloses a membrane bioreactor system for treating wastewater from a metal processing plant; and WO0037369, which discloses a membrane bioreactor for nitrogen-containing water treatment.
U.S. Pat. No. 5,772,821 discloses an immersed plate-and-frame type filtration membrane for wastewater treatment, which comprises a plate-like support made of non-woven fabric and an organic filtration membrane formed on the surface of the plate-like non-woven fabric support. Said organic filtration membrane is an ultrafiltration membrane or a precision filtration film.
FIG. 1 shows a schematic diagram of a filtration module constructed according to a preferred embodiment of the present invention;
FIG. 2 shows a schematic diagram of an immersed type membrane bioreactor system using a filtration module of the present invention.
Legends:
1..inlet water 2..inlet water tank 3..inlet water pump 4..membrane bioreactor 5..filtration module 6..blower 7..air 8..outlet water pump 9..outlet water 10..non-woven fabric membrane 11..pressure gauge 12..outlet water flowmeter 13..inlet water flowmeter 20..support 30..central passage
The present invention discloses a membrane bioreactor using a non-woven fabric filtration membrane, which can be used for the treatment of domestic wastewater, industrial wastewater, farming wastewater, nitrogen removal from water or waste water, and wastewater recovery.