ENOS L STOVER
Engineering in Stillwater, OK

6748331, Jun 8, 2004

Sep 20, 2001

09/807014

Qin Zhao - Plano TX
Gerald E. Wilson - Stillwater OK
Christopher K. Campana - Hope NJ
Enos L. Stover - Stillwater OK

Stover Associates, Inc. - Stillwater OK

G06F 1900

702 19, 435 34, 435 405

Method and apparatus for identifying a filamentous organism of the type present in a biological waste water treatment process. A magnified image of an unstained filamentous organism is obtained ( ), and initially evaluated for the presence or absence of attached growth and the presence or absence of sulfur granules ( ). A computer routine ( ) resident in a computer workstation ( ) is executed which, for each combination of the presence or of attached growth and the presence or absence of sulfur granules, provides a separate user interactive search tree ( ), each search tree leading to a different set of possible types of filamentous organism.

6660164, Dec 9, 2003

Oct 2, 2000

09/555577

Enos L. Stover - Stillwater OK 74071

C02F 312

210612, 210614, 210620, 210629, 210143, 210149, 210194

The present invention provides a process and apparatus for autothermal aerobic thermophilic treatment of high strength and high temperature wastes. Waste material is injected into a reactor vessel ( ) having thermophilic microorganisms to form a volume of bulk liquid in the reactor vessel ( ). An oxygen-containing gas is also injected into the reactor vessel ( ) for aerobic treatment of the waste material. The oxidation-reduction potential and temperature of the reactor bulk liquid are monitored and at least a selected one of the rate of injection of the oxygen-containing gas, the oxygen-transfer efficiency of the oxygen-containing gas and the volume of bulk liquid in the reactor ( ) are adjusted in response to the oxidation-reduction potential and temperature of the reactor bulk liquid to maintain the temperature of the reactor bulk liquid within a predetermined range.

5228995, Jul 20, 1993

Apr 23, 1992

7/872444

Enos L. Stover - Stillwater OK

C02F 328

210603

A biochemically enhanced hybrid anaerobic reactor (BEHAR) system has been developed for treatment of high strength industrial wastewaters. The process is designed and operated based on specific criteria developed around critical biochemical and microbiological principles of the facultative and anaerobic microorganisms involved in anaerobic treatment. Biological kinetic relationships developed by the inventor for substrate removal, methane gas production, and biogas quality control as a function of the mass substrate loading rate are used for designing and operating the BEHAR process. A specific formulation of biological growth micronutrients has been developed for enhancing the anaerobic treatment process. Ferric chloride, one of the chemicals used as a micronutrient, is also utilized for sulfide toxicity control, biogas cleaning without scrubbing, and odor control. Magnesium hydroxide is also used as a micronutrient while offering the added benefits of sulfide toxicity control, biogas cleaning without scrubbing, odor control, and addition of alkalinity and buffering capacity to the BEHAR system, along with sodium toxicity control.

6036862, Mar 14, 2000

Aug 14, 1998

9/134557

Enos L. Stover - Stillwater OK

C02F 312

210603

The present invention provides a process and apparatus for autothermal aerobic thermophilic treatment of high strength and high temperature wastes. In accordance with the process of the present invention, waste material is injected into a reactor vessel having thermophilic microorganisms to form a volume of bulk liquid in the reactor vessel. An oxygen-containing gas is also injected into the reactor vessel in such manner as to transfer oxygen into the reactor bulk liquid for utilization by the thermophilic microorganisms in aerobic treatment of the waste material. The oxidation-reduction potential and temperature of the reactor bulk liquid are monitored and at least a selected one of the rate of injection of the oxygen-containing gas, the oxygen-transfer efficiency of the oxygen-containing gas and the volume of bulk liquid in the reactor are adjusted in response to the oxidation-reduction potential and temperature of the reactor bulk liquid to maintain the temperature of the reactor bulk liquid within a predetermined range. This allows the system to match the oxygen transfer to the oxygen demand for the system. In particularly preferred embodiments, other parameters such as pH, COD, TS, VS, VFAs, NH. sub. 3 --N, PO. sub.

2012005, Mar 8, 2012

Mar 9, 2011

13/044246

Enos Loy Stover - Stillwater OK, US
Ted Ross Stover - Stillwater OK, US

C12P 5/02, D21C 7/12, D21C 1/00

435167, 162 49, 162238

The present invention relates to a process for pretreatment of a feedstock in a pretreatment tank. Various parameters, such as oxidation-reduction potential, pH, and temperature, are monitored in the pretreatment tank to determine whether the oxidation-reduction potential, pH, and temperature are each within a predetermined range. The volume of feedstock inside the pretreatment tank is adjusted in response to a determination that one of the oxidation-reduction potential, pH, and temperature of the treated material are outside the corresponding predetermined ranges to maintain the oxidation-reduction potential, pH, and temperature of the treated material within operating conditions.

2012006, Mar 15, 2012

Mar 9, 2011

13/044197

Enos Loy Stover - Stillwater OK, US
Ted Ross Stover - Stillwater OK, US

C12Q 3/00, C12M 1/38, C12M 1/36, C12M 1/34

435 3, 4352871, 4352861, 4352875, 4352866

An improved process and apparatus for producing biogas having a high methane content from a feed or substrate. Feed material is injected into a reactor having anaerobic microorganisms to form a bulk liquid in the reactor. The oxidation-reduction potential, pH, and temperature of the bulk liquid and the methane, carbon dioxide, hydrogen sulfide, and flow of the biogas is monitored. The amount of the feed material (substrate) fed to the reactor is adjusted in response to the monitoring parameters of the bulk liquid and biogas. A biomass recycle is provided to the reactor, thus increasing the reactor biomass retention time, or solids retention time within the reactor.