US 12,472,465 B2
Utilization of biogas scrubber in anaerobic membrane bioreactor systems
Dwain Wilson, Fredericton (CA); Daniel Bertoldo, Fredericton (CA); Josh Snowdon, Fredericton (CA); Jonathan Dargavel, Fredericton (CA); and Shannon Grant, Fredericton (CA)
Assigned to Evoqua Water Technologies Canada Ltd., Fredericton (CA)
Appl. No. 17/793,435
Filed by Evoqua Water Technologies Canada Ltd., Fredericton (CA)
PCT Filed Jan. 18, 2021, PCT No. PCT/CA2021/050051
§ 371(c)(1), (2) Date Jul. 18, 2022,
PCT Pub. No. WO2021/142553, PCT Pub. Date Jul. 22, 2021.
Claims priority of provisional application 62/961,827, filed on Jan. 16, 2020.
Prior Publication US 2023/0038934 A1, Feb. 9, 2023
Int. Cl. B01D 53/52 (2006.01); B01D 53/78 (2006.01); B01D 53/84 (2006.01); C02F 3/00 (2023.01); C02F 3/28 (2023.01); C12M 1/00 (2006.01); C12M 1/107 (2006.01); C12M 1/12 (2006.01); C12M 1/34 (2006.01); C02F 101/10 (2006.01); C02F 103/32 (2006.01); C02F 103/36 (2006.01)
CPC B01D 53/52 (2013.01) [B01D 53/78 (2013.01); B01D 53/84 (2013.01); C02F 3/006 (2013.01); C02F 3/2853 (2013.01); C12M 21/04 (2013.01); C12M 25/02 (2013.01); C12M 41/34 (2013.01); C12M 47/18 (2013.01); B01D 2251/60 (2013.01); C02F 2101/101 (2013.01); C02F 2103/32 (2013.01); C02F 2103/36 (2013.01); C02F 2209/003 (2013.01); C02F 2209/08 (2013.01); C02F 2209/265 (2013.01); C02F 2209/38 (2013.01); C02F 2303/16 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A system for treating wastewater having sulfur and a chemical oxygen demand (COD), the system comprising:
an anaerobic membrane bioreactor comprising a submerged membrane and a gas distributor positioned to scour the membrane, an influent inlet fluidly connected to a source of the wastewater, a permeate outlet, a biogas outlet, and a scrubbed biogas inlet;
a scouring gas closed loop extending between the biogas outlet and an inlet of the gas distributor, the inlet of the gas distributor being distinct from the scrubbed biogas inlet;
a scrubber having an inlet fluidly connectable to the biogas outlet through a first line outside of the scouring gas closed loop and an outlet fluidly connectable to the scrubbed biogas inlet through a second line outside of the scouring gas closed loop; and
a control mechanism configured to direct a first portion of the biogas to the scrubber and a second portion of the biogas to the gas distributor.