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Technical Paper: Treatment Of Coal Bed Methane Produced Water Using Short Bed Ion Exchange
By Michael Sheedy And Paul Robinson, Eco-Tec Inc., Pickering, Ontario
Coal bed methane, CBM exists in coal deposits throughout North America and at the turn of this century was estimated to supply 7% of US natural gas demand. The importance of this source of gas has only continued to grow over the subsequent years.
Natural gas in the coal seams is trapped by the ground water pressure. Production wells are drilled into the coal seam and once a sufficient amount of water is removed the well goes into gas production. Withdrawal of this ground water is one of the major concerns related to utilizing this source of energy and has been the focus of federal and state regulators, local landowners, and other special interest groups.
Consequently beneficial use of this water is of great importance. Alternate uses for this water include the following: agriculture – for livestock and irrigation, municipal supply, underground injection to recharge ground water supply, surface discharge to streams or soil, impoundment storage and as a supply for industrial use. Water quality standards vary depending on the use.
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