STANLEY RICHARD KARRS
Engineers in Gibsonia, PA

5298164, Mar 29, 1994

Jul 28, 1992

7/920781

Gary S. Hapach - Valencia PA
Stanley R. Karrs - Gibsonia PA
Kenneth E. Ondrusek - Freedom PA

United States Filter Corporation - Rancho Mirage CA

C02F 306

210604

An aerobic treatment of waste water is accomplished in such a manner as to effectively reduce the emission of volatile organic compounds contained therein by first re-introducing oxygen containing gas previously used in the process as supplemented with additional oxygen containing gas to fulfill make-up requirements during the operation. The reuse is effected in an enclosed vessel having a lower sparging compartment within which both a suitable quantity of mixed reused and make-up gas is thoroughly mixed with contaminated waste water being introduced therein for treatment. The thus humidified gas and preliminarily treated waste water are then moved upwardly within and through a central biological growth area, and the treated waste water is formed as a liquid level in an upper compartment and removed through a trap therefrom to maintain a water level therein and collect the resultant treated oxygen containing gas above the water level. A portion of the oxygen containing gas containing volatiles therein may be vented and the main portion that is released above the water level is continuously removed from a chamber area above the water level, and progressively mixed with a suitable quantity of make-up oxygen containing gas, and then introduced into the sparging chamber for continuing the operation.

2012003, Feb 16, 2012

Aug 8, 2011

13/204849

Stanley R. Karrs - Gibsonia PA, US
Richard A. Altman - Kingwood TX, US

SIEMENS INDUSTRY, INC. - Alpharetta GA

C02F 1/52, C02F 5/06, C02F 5/00, C02F 101/20

210709, 210 961

Disclosed herein is a controlled method of minimizing radioactive sludge generation in treatment of wastewater from an oil and/or gas well. The method comprises measuring a concentration of a radioactive material in wastewater to be treated and measuring a concentration of barium in the wastewater to be treated. The method further comprises adding a calculated quantity of sulfate to the wastewater to be treated sufficient to precipitate a quantity of barium sufficient to reduce the concentration of the radioactive material to a level such that sludge precipitated in a secondary precipitation has a radiation level below a defined radiation level.

2011016, Jul 7, 2011

Sep 17, 2009

13/119275

Gerald Alexander - La Canada CA, US
Stanley R Karrs - Gibsonia PA, US
Richard Woodling - Singapore, SG
Karthikeyan Sathrugnan - Singapore, SG

Siemens Pte Ltd - Singapore

C02F 1/44, C02F 1/52

210638, 210639

A high recovery sulfate removal process comprises treating a feed water stream conditioned with antiscalant from a source with a reverse osmosis membrane system to produce a purified water permeate stream and a reject stream containing the retained or rejected ions and organic matter. The reject stream is further treated to remove dissolved and suspended species. The reject stream flows to a desaturation/clarification process. A preferred process includes a constant stirred tank reactor (CSTR) where co-precipitation agent is added followed by a clarifier. Water recycled from the clarifier overflow is blended with feed water stream. The removed solids are collected as sludge or a slurry and disposed of in a manner consistent with applicable regulations.