• Sign Up or Sign In

Q.E.D. Environmental Systems


QED Environmental Systems design, manufacture and support environmental technology solutions for groundwater, soil and gas management applications into industrial, environmental and energy markets worldwide. Its corporate headquarters are in the USA which support the North, Central and South American markets. QED’s International office covers Europe, the Middle East, Africa and Asia-Pacific. The company’s focussed vertical markets include remediation, landfill, biogas, medical and food and beverage. QED has an extensive network of established international distributors, enabling it to provide its products, services and support in a local language to over 60 countries throughout the world. QED also has a strong portfolio of acquired product brands including Geotech, Landtec and Viasensor gas analysers, En Novative Technologies soil sampling products and Snap Sampler groundwater sampling solutions.


Cyan Park Unit 3
Jimmy Hill Way

Ventilation Air Methane (VAM)

Geotech's automatic low-concentration VAM analysers are in their second year of operation in Asia measuring valuable methane in exhaust coalmine ventilation air.

This occurs as huge ventilation fans draw clean air through the mines to make the atmosphere breathable. Although the methane concentration is low, at 0.3-0.7 percent, the moved-air volume is huge. Potentially this can give a substantial and valuable methane yield which mine operators seek to extract to flare or for generating electricity to sell. Both activities convert methane to carbon dioxide and offer Clean Development Mechanism (CDM) income streams from marketable, certified emissions reductions (CEM), carbon credits.

To gain the potentially valuable returns from VAM, mine operators need to know how much methane they can harvest from each mine and if investment in each is worthwhile. This needs very sensitive, automatic, transportable and robust measurement and data-logging equipment to work on surface at coalmines, as does the Geotech VAM Analyser. It measures the level and variation in methane concentrations every few minutes and can be left in-situ permanently and/or moved to the next site to measure the methane. It stores up to 3000 reading, enough for 31 days at 15-minute intervals. These data can be acquired remotely at any time by polling a built-in GSM phone modem.

Geotech gas analysers are at the forefront of methane monitoring technology. Day-in-and-day-out Geotech fixed position, static remote gas analysis equipment monitors extracted gas concentrations in many other applications including landfill gas (c.65 percent methane) and biogas around the world. Geotech's portable VAM analysers log low methane percentages, flow and pressure in the exhaust air and log data. For permanent installation the Geotech CDM-approved AEMS (automated extraction monitoring system) is set to monitor VAM at c.0.3-0.7 percent. This gives long-term, remote, fully automated, self-purging and self-calibrating static analysis. Data stored locally are also Internet-modem copied to off-site servers and available for Internet inspection and download.
More www.geotech.co.uk/aems.php

For further information please email Geotechnical Instruments

© Faversham House Group Ltd 2020. WWT and WET News news articles may be copied or forwarded for individual use only. No other reproduction or distribution is permitted without prior written consent.

Cookie Policy   |   Privacy Policy