JOHN HAGER REID
Engineers in Fredericksburg, VA

4455232, Jun 19, 1984

Mar 24, 1982

6/361205

John H. Reid - Fredericksburg VA

C02F 320

210628

A barriered circulator/aerator in the endless channel of a barrier oxidation ditch provides a directly pumped flow of mixed liquor into a central liquor inlet zone and an energy-release induced flow of mixed liquor into a surrounding liquor inlet zone at the inlet of a deep oxygen contact duct which passes beneath the barrier to the discharge channel on the downstream side thereof. It further provides mixing of diffused air with the directly pumped flow and/or the induced flow and then moving the combined air-liquor flows into the deepest portion of the contact duct where point-source pressurized aeration of both flows occurs. Eddy jet diffusers are preferably used for aerating the induced flow. Oxygen transfer efficiencies are obtained that are 1. 6-2. 2 times as great per brake horsepower per hour as that attainable by 100% pumping of the mixed liquor in a total barrier oxidation ditch, as disclosed in U. S. Pat. No.

4728517, Mar 1, 1988

Dec 3, 1984

6/677556

William M. Markham - Verona VA
John H. Reid - Fredericksburg VA

A23K 104, A23K 110

426 53

A process is described for producing an animal feed, comparable to feathermeal in properties and appearance, from two waste products: float sludge and activated sludge. The process uses a bulking agent for extracting excess fat from the sludges, particularly the float sludge, while a mixture of the sludges and the bulking agent is being stirred, heated, and dried. Blood, chicken litter, meat scrap, and the like can be substituted for activated sludge to provide protein. The bulking agent can be any material that can expose the sludges to air, that is capable of absorbing fat, and that can be separated from the dried and partially de-fatted sludges. Wood chips are the preferred bulking agent. Wood shavings, shredded cardboard, shredded newspaper, paunch manure, and the like can be substituted for wood chips as the bulking agent. More specifically, the process comprises: (a) admixing wood chips, float sludge, and activated sludge to form a mixture; (b) heating and tumbling the mixture until it is substantially dry; and (c) screening the dried mixture to produce a meal as the product and fat-impregnated wood chips as a bay-product.

4734197, Mar 29, 1988

Mar 14, 1986

6/839588

John H. Reid - Fredericksburg VA

C02F 320

210629

A jet aerator header assembly is provided for the deep oxygen contact duct of a partial, total, or non-barriered oxidation ditch having an endless channel. The header assembly may be vertically installed in the bottom of the contact duct or at an angle in the intake portion thereof as a mid-duct header assembly; it can additionally be installed in a horizontal position at the inlet of the contact duct as an inlet header assembly. Each header assembly comprises a liquid header, an air header, a plurality of jet aerators which are flow connected to both headers, stiffener plates which rigidly attach the headers to each other and to the jet aerators, and pipes connecting the headers to respective liquid and air supply lines. The mid-duct header assembly is slideably mounted within an access duct which is accessible from the surface. The mid-duct header assembly can be operated to provide: (1) a base level of dissolved oxygen in the mixed liquor being discharged from the contact duct, and (2) a minimum circulation velocity within the endless channel of the oxidation ditch.

7011757, Mar 14, 2006

Feb 4, 2004

10/770427

John H. Reid - Fredericksburg VA, US

C02F 3/30

210605, 210621, 210629, 210903, 210906

A process that removes nitrogen by the MLE Process or nitrogen and phosphorus by the Bio-P Process from municipal or industrial wastewaters by combining at least one dual-use jet recirculation pump with jet manifolds disposed at the bottoms of deep tanks functioning as Reactors to withdraw mixed liquor from a flow-connected tank and mixed liquor from a downstream tank in selected amounts, both mixed liquors being pumped to the jet manifold within the flow-connected tank that mixes the contents of the tank, whereby higher operating costs for electric power and higher capital costs for larger pumps and piping are avoided.

4902302, Feb 20, 1990

Jun 17, 1987

7/063257

John H. Reid - Fredericksburg VA

C02F 322

210628

For use in an activated sludge process, dual-baffle aerators for both vertically mounted surface aerators and static mixer-aerators are disclosed. These devices substantially prevent back-mixing of freshly aerated liquor into aerator intakes and provide directional propulsion. By connecting two or more such devices to form a barrier across the channel of an oxidation ditch, homogeneous aeration is provided to the mixed liquor. Barriered pump/aerator assemblies utilizing directional mix jet aerators (eddy jet) are also described. These devices can also be combined with dual-baffle aerators to furnish both propulsion and a selected degree of homogeneous aeration in a barrier oxidation ditch. An adjustably apertured barriered pump assembly is additionally disclosed for providing a selected balance between homogeneous aeration and/or mixing and heterogeneous aeration and/or mixing. Gateways therein are opened sufficiently to conserve momentum in the translationally flowing liquor while preventing back-mixing of aerated liquor.

4532038, Jul 30, 1985

May 11, 1983

6/492156

John H. Reid - Fredericksburg VA

C02F 320

210194

In aerobic wastewater treatment systems, such as sewage treatment, liquid in a channel spanned by a liquid-tight barrier is moved past the barrier by a liquid-gas contact pump, thus dissolving a gas in the liquid and creating a differential head that provides flow energy for moving the liquid in plug-type flow through the channel, which is preferably a continuous-flow pipeline or a circuit-flow oxidation ditch, without energy-wasteful vertical circulation. The barrier further provides a structure for mounting submerged static aerators or a draft tube, in combination with a surface aerator, such as a submerged turbine or surface-disposed impeller aerator, as the liquid-gas contact pump. The barrier is disposed at sufficient depth, when combined with static aerators or when telescopically attached to the draft tube of a floating surface aerator, to enable the liquid level to be selectively varied so that flow equalization to an oxidation ditch and wastewater storage therewithin are provided. Because of the plug-type flow and capability of maintaining it at 0. 75-1.

2013032, Dec 12, 2013

Jun 12, 2012

13/494690

John H. Reid - Fredericksburg VA, US

C02F 3/28

210607, 21017009, 210150, 210151

An anaerobic lagoon wastewater treatment system, which includes a plurality of wastewater treatment zones. The treatment zones are either formed by providing a plurality of separate lagoons or by providing one or more partitioning elements within one lagoon. One or more treatment zones may also be provided in the form of a tank. The first wastewater treatment zone in the direction of wastewater flow has a smaller volume than the second wastewater treatment zone. Further, the first wastewater treatment zone achieves a significant reduction in fat, oil and grease removal, as well as in total suspended solids removal, but only a modest reduction in biological oxygen demand. An effluent from the first wastewater treatment zone is mixed with an effluent from the second wastewater treatment zone such that a predetermined ratio of carbon to nitrogen is maintained within the mixture of first and second effluents.

5041217, Aug 20, 1991

Aug 29, 1990

7/576153

John H. Reid - Fredericksburg VA

C02F 320

210194

A process and any of several pump/circulators provide selective rapid mixing of influent wastewater with the mixed liquor in the channel of an oxidation ditch and thereby provide maximized use of the entire volume of the channel. The pump/circulator is disposed at the beginning of the anoxic zone and preferably receives the influent wastewater. The oxidation ditch is preferably a barrier oxidation ditch or at least a baffle oxidation ditch in order to prevent backmixing.

4643830, Feb 17, 1987

Jun 18, 1984

6/621740

John H. Reid - Fredericksburg VA

C02F 320

210629

A process for operating a total barrier oxidation ditch to provide concentrated power input per unit volume of the downwardly pumped liquor-air mixture and high mixing turbulence at maximum contact depth and hydrostatic pressure.

4443338, Apr 17, 1984

Sep 30, 1982

6/429165

John H. Reid - Fredericksburg VA

C02F 320

210629

Methods are provided for converting both plug flow and complete mix basins of the prior art into barrier oxidation ditches. Circulator/aerators are described that can be prefabricated and dropped onto the floor of an existing basin so that, in combination with at least one partition, if needed, an endless channel is created with minimum disruption of the activated sludge process.