Membrane bioreactor and a system having the same

Abstract

This invention discloses a membrane bioreactor and system for filtering wastewater in a reaction tank. The membrane bioreactor includes a hybrid power system and at least one filter membrane. The hybrid power system is configured to selectively output a fluid driving force and a mechanical driving force. The filter membrane is disposed in the reaction tank and coupled to the hybrid power system. The fluid driving force is used to establish a transmembrane pressure difference on the filter membrane, thereby driving wastewater to permeate the filter membrane to form permeate. The mechanical driving force drives the filter membrane to reciprocate within the reaction tank, thereby generating a physical scrubbing effect on the filter membrane surface and dynamically removing sludge accumulated on the filter membrane surface during wastewater filtration, preventing clogging.

Claims

1. A membrane bioreactor (MBR) for filtering wastewater in a reaction tank, comprising: a hybrid powertrain configured to selectively output a fluid driving force and a mechanical driving force; and at least one filter membrane disposed in the reaction tank and coupled to the hybrid powertrain, wherein, The fluid driving force is used to establish a transmembrane pressure difference on the at least one filter membrane to drive the wastewater through the at least one filter membrane to form permeate, and the mechanical driving force drives the at least one filter membrane to perform a reciprocating motion in the reaction tank to generate a physical scrubbing effect on the surface of the at least one filter membrane and dynamically remove the sludge accumulated on the surface of the at least one filter membrane during the filtration of wastewater, so as to avoid clogging.

2. The membrane bioreactor as claimed in claim 1 further includes a transmission unit coupled to the composite power assembly, the composite power assembly driving the at least one filter membrane to perform the reciprocating motion via the transmission unit.

3. The membrane bioreactor as claimed in claim 2, wherein the composite powertrain includes a drive motor that outputs the mechanical driving force to drive the at least one filter membrane to perform the reciprocating motion via the transmission unit.

4. The membrane bioreactor as claimed in claim 3, wherein the transmission unit includes a transmission link and a track assembly, the transmission link being coupled to the drive motor and the at least one filter membrane being coupled to the track assembly, such that the drive motor drives the track assembly via the transmission link, and the track assembly drives and restricts the at least one filter membrane to perform the reciprocating motion along a predetermined path.

5. The membrane bioreactor as claimed in claim 1, wherein the at least one filtration membrane is a hollow fiber membrane, and when the mechanical driving force drives the hollow fiber membrane, the reciprocating motion of the hollow fiber membrane body is an S-shaped wave motion, and the fluid driving force establishes the transmembrane pressure difference in the hollow fiber membrane to drive the wastewater through the hollow fiber membrane to form the product water.

6. The membrane bioreactor as claimed in claim 1, wherein the at least one filter membrane is a flat sheet membrane having a flow guide interlayer, and the fluid driving force is to establish the transmembrane pressure difference on the flat sheet membrane to drive the wastewater through the surface of the flat sheet membrane into the flow guide interlayer to form the permeate.

7. The membrane bioreactor as claimed in claim 3, wherein the composite powertrain further includes a pump unit that outputs the fluid driving force to establish the transmembrane pressure difference on the at least one filter membrane, and selectively guides backwash water to penetrate the at least one filter membrane in the reverse direction for pore cleaning.

8. A membrane bioreactor system for treating wastewater, comprising: an aerobic tank for receiving the wastewater and performing aerobic treatment on the wastewater; a reaction tank fluidly connected to the aerobic tank for receiving the wastewater after aerobic treatment; and a membrane bioreactor as described in claim 1, installed in the reaction tank for filtering the wastewater in the reaction tank to form product water.

9. The membrane bioreactor system as claimed in claim 8, wherein the at least one filtration membrane is a hollow fiber membrane, and when the mechanical driving force drives the hollow fiber membrane, the reciprocating motion of the hollow fiber membrane body is an S-shaped wave motion, and the fluid driving force establishes the transmembrane pressure difference in the hollow fiber membrane to drive the wastewater through the hollow fiber membrane to form the product water.

10. The membrane bioreactor system as described in claim 8 further includes at least one anaerobic tank for receiving the wastewater and performing an anaerobic treatment on the wastewater.

11. The membrane bioreactor system as claimed in claim 10 further includes a sludge return path fluidly connected between the reactor and the anaerobic tank for returning the wastewater in the reactor to the anaerobic tank.

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