# US 2013/0153493 A1 · Moving bed membrane bioreactor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153493 A1 - Document ID: US20130153493A1 - Status: Published application - Kind: A1 - Application number: 13/816,767 - Filed: 2011-08-15 - Published: 2013-06-20 - Earliest claimed: 2010-08-13 - Assignees: University of Regina - Inventors: Stephanie Young; Alex Munoz - Web page: https://patentgrep.com/patent/US20130153493A1 ## CPC - C02F 3/1268: {Membrane bioreactor systems} - B01D 63/02: Hollow fibre modules - B01D 63/0241: {being U-shaped} - B01D 63/027: {Twinned or braided type modules} - B01D 65/02: Membrane cleaning or sterilisation {; Membrane regeneration} - B01D 65/08: Prevention of membrane fouling or of concentration polarisation - C02F 3/06: using submerged filters - C02F 3/1273: {Submerged membrane bioreactors} - B01D 2313/26: Specific gas distributors or gas intakes - B01D 2313/903: Integrated control or detection device - B01D 2315/06: Submerged-type; Immersion type - B01D 2321/04: Backflushing - B01D 2321/185: Aeration - C02F 1/32: with ultraviolet light - C02F 1/722: {Oxidation by peroxides} - C02F 1/76: with halogens or compounds of halogens {(C02F1/4674 takes precedence)} - C02F 1/78: with ozone {(C02F1/4672 takes precedence)} - C02F 2103/002: {Grey water, e.g. from clothes washers, showers or dishwashers} - C02F 2203/002: comprising an initial buffer container - C02F 2303/04: Disinfection - Y02W 10/10: Biological treatment of water, waste water, or sewage - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract This disclosure relates to a moving bed membrane bioreactor. The moving bed membrane bioreactor package plant comprises a pre-treatment system, a moving bed membrane bioreactor, and a post-treatment system. This disclosure further relates to mechanical devices and operational processes for a moving bed membrane bioreactor package plant for greywater and wastewater reclamation and reuse. This disclosure further relates to a bioreactor for greywater reclamation that integrates biofilm carriers with a hollow fibre membrane module and dual aeration system. ## Claims ### Claim 1 A moving bed membrane bioreactor package plant for greywater reclamation or wastewater treatment and reuse, comprising; a. Pre-treatment system, b. Moving bed membrane bioreactor, and c. Post-treatment system. ### Claim 2 (depends on 1) The moving bed membrane bioreactor package plant of claim 1, wherein the pre-treatment system comprises: a. A 6 mm coarse screen and a 3 mm fine screen for conducting primary filtration of wastewater; b. An equalization tank for storage and equalization of wastewater flows and loads; and c. A recirculation system to maintain solids in suspension, control offensive odour and microbial growth ### Claim 3 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises of a bioreactor tank, membrane modules, biofilm coolers, dual aeration system, air scour system, permeate and backwash system, and filtration and backwash control system. ### Claim 4 (canceled) ### Claim 5 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a bioreactor tank, the tank comprising a removal lid, perforated channel strips mounted along the internal wall of the tank, an inlet feed nozzled located at the bottom and a permeate outlet nozzled located at the top. ### Claim 6 (canceled) ### Claim 7 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a bioreactor tank in the form of a vertical circular column with the height to diameter ratio of about 3 to about 5. ### Claim 8 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises membrane modules, the modules being submerged into the liquor in the bioreactor at the top section of the bioreactor. ### Claim 9 (canceled) ### Claim 10 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises membrane modules, the modules comprising fibres oriented parallel to the wastewater flow. ### Claim 11 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises biofilm carriers which are retained in the middle section of the bioreactor. ### Claim 12 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a dual aeration system, the system comprising a circular perforated pipe diffuser and stone diffusers. ### Claim at position 13 -16. (canceled) ### Claim 17 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a permeated and backwash system comprising of a reversible pump and permeate tank to convey permeate from the inside of the membrane fibres to the permeate tank or to convey disinfected permeate from the permeate tank back to the bioreactor through the membrane. ### Claim 18 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises an automated filtration and backwash control system that regularly monitors the differential pressure between a pressure sensor, P, located in the permeate/backwash line and the initial pressure at the beginning of the filtration cycle, P0. ### Claim 19 (canceled) ### Claim 20 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a membrane module comprising hollow fibres having a hydrophilic surface. ### Claim 21 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a hollow fibre membrane module, the fibres having a linear loop pattern. ### Claim 22 (depends on 1) The circular loop moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a hollow fibre membrane module, the fibres having a circular loop pattern. ### Claim 23 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises a hollow fibre membrane module, the fibres having a twist pattern. ### Claim 24 (canceled) ### Claim 25 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein 25 and 67% of the bioreactor volume comprises biofilm carriers. ### Claim 26 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises biofilm carriers which are maintained in suspension by the continuous upward movement of the wastewater and air bubbles. ### Claim 27 (depends on 1) The moving bed membrane bioreactor of claim 1, wherein the bioreactor comprises the biofilm carriers having an effective surface area of 250 to 500 m2/m3 and overall specific density with attached biofilm of 1,200 to 1,300 kg/m3. ### Claim 28 (canceled) ### Claim 29 A process from treating wastewater or greywater in a moving bed membrane bioreactor comprising the steps of: a. Feeding wastewater to the bottom of a bioreactor tank where biological processes reduce wastewater contaminants to such a low levels that permit effluent reuse; b. Integrating suspended growth and attached growth activated sludge process in conjunction with membrane filtration process to provide an equivalent mixed liquor suspended solids of 15,000 mg, MLSS/L; c. Providing nitrogen removal in a single bioreactor tank; d. Providing upwards wastewater flow through the bioreactor; e. Providing one or more membrane modules submerged into the mixed liquor so that the hollow fibre membranes can separate the permeate from the sludge under negative pressure provided by a pump; f. Proving air scour bubbles to dislodge sludge accumulated on the surface of the membrane fibres; g. Providing continuous circulation of oxygen enriched sludge from the surface of the membrane to the bottom of bioreactor; h. Providing a perforated pipe for mixing and aeration, and i. Providing automated control of membrane filtration and backwash units. ### Claim 30 (depends on 29) The process of claim 29, wherein air flow is cycled for 10 to 20 minutes of airflow OFF followed by 10 to 20 minutes of airflow ON and where the airflow rate is regulated automatically to maintain a dissolved oxygen concentration of 2 mg/L during the aerobic cycle and less than 1 mg/L during the pump off period. ### Claim at position 28 -34. (canceled)