Importance

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Abstract

A system and method for monitoring or controlling an aerobic landfill bioreactor having a plurality of zones each including at least one well head. The system comprises: a gas extraction blower, a plurality of temperature sensors disposed in the well heads, an ex-situ relative humidity detector, an ex-situ gas constituent detector, an air injection system, a liquid injection system, and a controller. Landfill gas is extracted by the blower and it's temperature, relative humidity, and gas constituents are measured. The system further comprises a system of headers, isolation valves, and flow control valves which serve to isolate zones for measurement and/or air and liquid injection as well as control the flow of either the landfill gas extraction or liquid and air injection. The method involves measuring: temperature, relative humidity, and gas constituents of the extracted landfill gas. Advantageously, the ex-site placement of the sensors and detectors ensure that measurements are representative of the aerobic bioreactor operating parameters. The air and liquid injection systems are adjusted, based on the measured temperature, relative humidity, and gas constituents to optimize the operation of the aerobic landfill bioreactor.

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First Claim