Viet H. Ngo
Engineering at Lyndale Ave, Minneapolis, MN

5736047, Apr 7, 1998

May 4, 1995

8/434659

Viet H. Ngo - Minneapolis MN

Lemna Corporation - St. Paul MN

C02F 330, C02F 332

210602

A hybrid system and related process for the removal of biological nutrients from wastewater. The system provides an activated sludge system, including both a single-sludge reactor and clarification unit, flowably connected with a final aquaculture pond for final polishing of BOD from the clarified mixed liquor supernatant.

5264127, Nov 23, 1993

Dec 11, 1992

7/989899

Viet H. Ngo - Minneapolis MN
Warren D. Poole - St. Paul MN
Sean J. Hancock - Eagan MN
Timothy T. France - Oakdale MN

The Lemna Corporation - Mendota Heights MN

C02F 332

210602

A floating aquatic plant water treatment system (31) utilizes a serpentine channel (36) defined by dividing walls (34). Floating plants (72) are distributed across the water surface by a floating grid structure (32). The grid structure (32) is preassembled into Z-fold bundles (88) which are towed onto the water and unfolded. The treatment system uses sprayers (62) to control growth conditions. Porous baffles (46) are placed along portions of the channel (36) to provide intimate contact with a larger portion of the water while allowing free flow.

5342512, Aug 30, 1994

Feb 11, 1993

8/017340

Viet H. Ngo - Minneapolis MN
Warren D. Poole - St. Paul MN
Sean J. Hancock - Eagan MN
Timothy T. France - Oakdale MN

The Lemma Corporation - Mendota Heights MN

C02F 332

210151

A floating aquatic plant water treatment system (31) utilizes a serpentine channel (36) defined by dividing walls (34). Floating plants (72) are distributed across the water surface by a floating grid structure (32). The grid structure (32) is preassembled into Z-fold bundles (88) which are towed onto the water and unfolded. The treatment system uses sprayers (62) to control growth conditions. Porous baffles (46) are placed along portions of the channel (36) to provide intimate contact with a larger portion of the water while allowing free flow.

5409601, Apr 25, 1995

Jul 6, 1993

8/087031

Viet H. Ngo - Minneapolis MN
Warren D. Poole - St. Paul MN
Sean J. Hancock - Eagan MN
Timothy T. France - Oakdale MN

The Lemna Corporation - Mendonta Heights MN

C02F 332

210151

A floating aquatic plant water treatment system (31) utilizes a serpentine channel (36) defined by dividing walls (34). Floating plants (72) are distributed across the water surface by a floating grid structure (32). The grid structure (32) is preassembled into Z-fold bundles (88) which are towed onto the water and unfolded. The treatment system uses sprayers (62) to control growth conditions. Porous baffles (46) are placed along portions of the channel (36) to provide intimate contact with a larger portion of the water while allowing free flow.

5256281, Oct 26, 1993

Jun 20, 1991

7/717973

Viet Ngo - Minneapolis MN
Gary L. D'Heilly - Savage MN

The Lemna Corporation - Mendota Heights MN

C02F 332

210151

A sewage treatment pond has an inlet for introduction of sewage into the pond and an outlet for removal of sewage from the pond. A first baffle extends from the surface of the pond to the bottom of the pond and between the inlet and the outlet. The first baffle has an opening located a first distance from the surface of the pond so that sewage can pass through the opening. A second baffle is located between the inlet and the outlet. The second baffle extends from the surface of the pond to the bottom of the pond. The second baffle has an opening located a second distance from the surface of the pond.

5096577, Mar 17, 1992

Mar 17, 1989

7/323022

Viet H. Ngo - Minneapolis MN
Warren D. Poole - St. Paul MN
Sean J. Hancock - Eagan MN
Timothy T. France - Oakdale MN

The Lemna Corporation - Mendota Heights MN

C02F 332

210151

A floating aquatic plant water treatment system (31) utilizes a serpentine channel (36) defined by dividing walls (34). Floating plants (72) are distributed across the water surface by a floating grid structure (32). The grid structure (32) is preassembled into Z-fold bundles (88) which are towed onto the water and unfolded. The treatment system uses sprayers (62) to control growth conditions. Porous baffles (46) are placed along portions of the channel (36) to provide intimate contact with a larger portion of the water while allowing free flow.

5180501, Jan 19, 1993

Jun 20, 1991

7/717983

Viet H. Ngo - Minneapolis MN
Warren D. Poole - St. Paul MN
Sean J. Hancock - Eagan MN
Timothy T. France - Oakdale MN

The Lemna Corporation - Mendota Heights MN

C02F 332

210747

A floating aquatic plant water treatment system (31) utilizes a serpentine channel (36) defined by dividing walls (34). Floating plants (72) are distributed across the water surface by a floating grid structure (32). The grid structure (32) is preassembled into Z-fold bundles (88) which are towed onto the water and unfolded. The treatment system uses sprayers (62) to control growth conditions. Porous baffles (46) are placed along portions of the channel (36) to provide intimate contact with a larger portion of the water while allowing free flow.