公开(公告)号：US11724947B2

公开(公告)日：2023-08-15

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

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：US11352269B2

公开(公告)日：2022-06-07

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：US10781119B2

公开(公告)日：2020-09-22

申请号：US14769461

申请日：2013-02-22

Applicant: BL TECHNOLOGIES, INC.

Inventor： Pierre Lucien Cote ,  Steven Kristian Pedersen

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

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：US09643129B2

公开(公告)日：2017-05-09

申请号：US14717230

申请日：2015-05-20

Applicant: BL Technologies, Inc.

Inventor： Pierre Lucien Cote ,  Steven Kristian Pedersen

IPC: B01D69/08

CPC classification number: B01D69/087 ,  B01D69/085 ,  B01D2325/40

Abstract: Various methods of making a reinforced membrane, devices for making the membranes, and the resulting membranes are described. The methods typically provide a reinforcing structure that includes filaments extending around the circumference of the membrane but without the filaments being part of a braided or woven structure. Some of the reinforcing structures also include longitudinal filaments. The methods and devices can be used to make a supporting structure in line with membrane formation steps, and also allow for a reinforced membrane to be produced that has a ratio of inside-to-outside diameters of 0.5 or more.

公开(公告)号：US20160184777A1

公开(公告)日：2016-06-30

申请号：US14717230

申请日：2015-05-20

Applicant: BL Technologies, Inc.

Inventor： Pierre Lucien Cote ,  Steven Kristian Pedersen

IPC: B01D69/08

CPC classification number: B01D69/087 ,  B01D69/085 ,  B01D2325/40

Abstract: Various methods of making a reinforced membrane, devices for making the membranes, and the resulting membranes are described. The methods typically provide a reinforcing structure that includes filaments extending around the circumference of the membrane but without the filaments being part of a braided or woven structure. Some of the reinforcing structures also include longitudinal filaments. The methods and devices can be used to make a supporting structure in line with membrane formation steps, and also allow for a reinforced membrane to be produced that has a ratio of inside-to-outside diameters of 0.5 or more.

Abstract translation: 描述制造增强膜的各种方法，制造膜的装置以及所得的膜。 该方法通常提供一种加强结构，其包括围绕膜的圆周延伸的细丝，但是丝不是编织或编织结构的一部分。 一些加固结构还包括纵向长丝。 该方法和装置可以用于制造符合膜形成步骤的支撑结构，并且还允许制造具有0.5至更大的内外径比的增强膜。

公开(公告)号：US11850554B2

公开(公告)日：2023-12-26

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: B01D61/18 ,  C02F3/20 ,  C02F11/123 ,  C02F1/00 ,  C02F3/12 ,  B01D61/22 ,  C02F101/16

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.