The United States of America As Represented by the Administrator of the

Arcadis Geraghty-miller, Inc.

Paul M Lemieux

Jost O Wendt

William P Linak

Keith Joseph Fritsky

Charles Andrew Miller

Ronald W Lowans

Paul Jeffrey Chappell

Jeffery V Ryan

Ronald L Capone

William T Preston

Joseph A McSorley

Apparatus and method for periodic analysis of trace amounts of volatile organic compounds in a waste gas provide for feeding of a sample of a waste gas first to an organics concentrator which isolates the volatile organic compounds from the waste gas sample and prepares a concentrated sample for feed to a gas chromatograph. In normal operation, a waste gas is continuously sampled from the waste gas source to produce a continuous waste gas flow through a switching valve and out a vent. A portion of that waste gas flow is periodically diverted by the switching valve and routed to the organics concentrator. The switching valve also receives calibration samples containing known concentrations of the volatile organic compounds prepared in a gas blender. It periodically feeds the calibration samples to the organics concentrator and the gas chromatograph for calibration of the system.

On-line gas chromatograph with sample preparation, concentration, and

An artificial neural network is used to predict the current state of a process based upon sensor measurements of the process variables at previous times. The output of the neural network provides the process control system with the predicted process state, thereby reducing the time lag of the sensors and providing improved control of the process.

Method for improving process control by reducing lag time of sensors

Organic liquid-like hazardous waste is loaded with a sorbent in a container including interior and exterior compartments. The container is supplied to a rotary incinerating kiln. The waste is loaded in the container and the compartments are arranged so that the waste in the exterior compartment is initially vaporized in the kiln without the waste in the interior compartment mixing and being vaporized with the waste in the exterior compartment. The waste in the exterior compartment acts initially as a thermal and mass transfer barrier to prevent initial vaporization in the kiln of the waste in the interior compartment to substantially delay the vaporization of the waste in the interior compartment relative the vaporization time of waste in the exterior compartment and relative to the time when the waste in the interior compartment would have been vaporized if the container did not include the compartments.

Method of reducing transient emissions from rotary kiln incinerators and

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Cary, NC, United States of America

Paul M Lemieux