Evoqua Water Technologies Pte. Ltd.

United States Filter Corporation

Stanley R Karrs

Richard A Altman

Frank L Sassaman, Jr

David L Berger

Kenneth E Ondrusek

Gary S Hapach

A method of reducing a concentration of hydrogen peroxide from wastewater includes diluting the wastewater with water having a lower concentration of hydrogen peroxide than the wastewater to produce a diluted wastewater, contacting the diluted wastewater with a dissolved iron compound at an acidic pH to form a partially treated wastewater having a lower concentration of hydrogen peroxide than the diluted wastewater, and precipitating iron solids from the partially treated wastewater by raising a pH of the partially treated wastewater to form a neutralized partially treated wastewater.

Treatment of high peroxide waste streams

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.

Controlled method of minimizing radioactive sludge generation in post stimulation flowback and/or produced water treatment from a saltwater, oil and/or gas well

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.

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Gibsonia, PA, United States of America

Stanley R Karrs