公开(公告)号：US20230331605A1

公开(公告)日：2023-10-19

申请号：US18338182

申请日：2023-06-20

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien COTE ,  Steven Kristian PEDERSEN

IPC: C02F3/10 ,  B01D63/02 ,  B01D69/08 ,  C02F3/20 ,  B01D63/04 ,  C02F3/12

CPC classification number: C02F3/1273 ,  B01D63/02 ,  B01D63/027 ,  B01D63/04 ,  B01D69/081 ,  C02F3/102 ,  C02F3/103 ,  C02F3/208 ,  B01D2325/40 ,  C02F2303/20 ,  Y02W10/10

Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.

公开(公告)号：US20210355011A1

公开(公告)日：2021-11-18

申请号：US17284568

申请日：2019-10-18

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien COTE

IPC: C02F3/30 ,  C02F3/20

Abstract: This specification describes a membrane aerated biofilm media and reactor (MABR) having a discontinuous layer of a porous material applied to the outer surface of a gas-transfer membrane. The porous material may have a void fraction of 50% or more. The porous material may have a thickness of up to about 500 microns and a pattern on the same order of magnitude as its thickness. The media may be used to carry on a deammonification reaction. In use, ammonia oxidizing bacteria (AOB) and annamox bacteria grown in or on the media, with the annamox bacteria located primarily in the porous material. The supply of oxygen through the gas-transfer membrane is limited to suppress the growth of nitrite oxidizing bacteria (NOB). Excess biofilm is removed, for example by coarse bubble scouring. The media may be placed in an anoxic zone of an activated sludge plant, which may be upstream of an aerobic zone.

公开(公告)号：US20240091708A1

公开(公告)日：2024-03-21

申请号：US18508983

申请日：2023-11-14

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien COTE ,  Steven Kristian PEDERSEN ,  Wajahat Hussain SYED ,  Jeffrey Gerard PEETERS ,  Nicholas William H. ADAMS ,  Youngseck HONG ,  Geert-Henk KOOPS ,  James John ROYSTON

IPC: B01D61/18 ,  B01D61/22 ,  C02F1/00 ,  C02F3/12 ,  C02F3/20 ,  C02F11/123

CPC classification number: B01D61/18 ,  B01D61/22 ,  C02F1/004 ,  C02F3/1268 ,  C02F3/1273 ,  C02F3/201 ,  C02F11/123 ,  B01D2313/26 ,  B01D2315/06 ,  B01D2315/20 ,  C02F2101/16 ,  C02F2203/006 ,  C02F2303/20 ,  C02F2303/24 ,  Y02W10/10

Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.

公开(公告)号：US20200377397A1

公开(公告)日：2020-12-03

申请号：US16998704

申请日：2020-08-20

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien COTE ,  Steven Kristian PEDERSEN

IPC: C02F3/12 ,  B01D63/02 ,  B01D63/04 ,  B01D69/08 ,  C02F3/10 ,  C02F3/20

Abstract: A cord for supporting a biofilm has a plurality of yarns. At least one of the yarns comprises a plurality of hollow fiber gas transfer membranes. At least one of the yarns extends along the length of the cord generally in the shape of a spiral. Optionally, one or more of the yarns may comprise one or more reinforcing filaments. In some examples, a reinforcing yarn is wrapped around a core. A module may be made by potting a plurality of the cords in at least one header. A reactor may be made and operated by placing the module in a tank fed with water to be treated and supplying a gas to the module. In use, a biofilm covers the cords to form a membrane biofilm assembly.

公开(公告)号：US20230045679A1

公开(公告)日：2023-02-09

申请号：US17968569

申请日：2022-10-18

Applicant: BL Technologies, Inc.

Inventor： Pierre Lucien COTE ,  John David IRELAND ,  Nicholas William H. ADAMS ,  Steven Kristian PEDERSEN

IPC: C02F3/20 ,  C02F3/12 ,  B01F23/231 ,  B01F23/20 ,  C02F3/28 ,  C02F3/10 ,  B01F23/237 ,  B01F101/00 ,  C02F103/06

Abstract: An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.

公开(公告)号：US20200216330A1

公开(公告)日：2020-07-09

申请号：US16827155

申请日：2020-03-23

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien COTE ,  Jason CADERA ,  Steven Kristian PEDERSEN ,  Nicholas William H. ADAMS

IPC: C02F1/28 ,  C02F1/44 ,  B01D65/02 ,  B01D65/10 ,  B01D61/20

Abstract: A conventional media filter such as a gravity sand filter is converted into a membrane filter. The media is removed and replaced by immersed membrane modules. Transmembrane pressure is created by a static head pressure differential, without a suction pump, thereby creating a membrane gravity filter (MGF). Preferred operating parameters include transmembrane pressure of 5-20 kPa, 1-3 backwashes per day, and a flux of 10-20 L/m2/h. The membranes are dosed with chlorine or another oxidant, preferably at 700 minutes*mg/L as Cl2 equivalent per week or less. The small oxidant does is believed to provide a porous biofilm or fouling layer without substantially removing the layer. The media filter may be modified so that backwash wastewater is removed from near the bottom of the tank rather than through backwash troughs above the membrane modules. Membrane integrity testing may be done while the tank is emptied after a backwash.

公开(公告)号：US20190135667A1

公开(公告)日：2019-05-09

申请号：US16178974

申请日：2018-11-02

Applicant: BL Technologies, Inc.

Inventor： Pierre Lucien COTE ,  Steven Kristian PEDERSEN ,  Wajahat Hussain SYED ,  Jeffrey Gerard PEETERS ,  Nicholas William H. ADAMS ,  Youngseck HONG ,  Geert-Henk KOOPS ,  James John ROYSTON

IPC: C02F3/12 ,  C02F11/123 ,  B01D61/18 ,  C02F3/20 ,  B01D61/22 ,  C02F1/00

Abstract: Wastewater is treated though primary treatment of the water by way of a micro-sieve to produce a primary effluent and primary sludge. There is secondary treatment of the primary effluent by way of a membrane bioreactor (MBR) or an integrated fixed film activated sludge (IFAS) reactor to produce a secondary effluent and a waste activated sludge. The micro-sieve may have openings of 250 microns or less, for example about 150 microns. In a process, a gas transfer membrane is immersed in water. Pressurized air flows into the gas transfer membrane. An exhaust gas is withdrawn from the gas transfer membrane and used to produce bubbles from an aerator immersed in the water.