Hoot Aerobic Systems, Inc.

Ppg Industries, Inc.

Robert K Pertuit

Donald L Brown

Ronald J Suchecki, Jr

Troy L Cormier

Murphy J Cormier

J Douglas Mansell

W Eugene Wimer

J Boyd Alleman

Ronald J Suchecki

Disclosed is a method of denitrifying a solution including introducing into the solution an amount of a carbon source within a duration and at a frequency so that indigenous heterotrophic bacteria deplete dissolved oxygen in the solution and obtain oxygen from nitrate in the solution. Related apparatuses and compounds also are disclosed.

Method of denitrifying wastewater

Disclosed is an apparatus for denitrifying a solution that includes a denitrification tank configured to receive a portion of the solution for a period of time. Controlling an amount, duration and frequency of introduction of polyethylene glycol into the solution promotes indigenous heterotrophic bacteria depleting dissolved oxygen in the solution and obtaining oxygen from nitrate in the solution.

Apparatus for denitrifying wastewater

Perchloroethylene containing contaminating amounts of dichlorobutadiene is treated with bromine, e.g., elemental bromine, in the presence of a free-radical initiator, thereby to produce perchloroethylene substantially-free of dichlorobutadiene and without significant loss of perchloroethylene. A bromine scavenger, e.g., trichloroethylene, can be added to the treated perchloroethylene to react with excess bromine that may be present in the perchloroethylene.

Method for purifying perchloroethylene containing dichlorobutadiene

Growing community of inventors

Sulphur, LA, United States of America

Robert K Pertuit