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Locking Away Coal Combustion Wastewater Problem with Paste Technology

By Sue Longo

Many power producers are looking for ways to meet the U.S. Environmental Protection Agency (EPA) federal regulations for Coal Combustion Residuals (CCRs) and Effluent Limitations Guidelines (ELGs). One of the thorniest problems involves handling the water produced by many ash-management processes — particularly the wastewater from the flue gas desulfurization (FGD) process.

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An Innovation Solution to Aging Infrastructure: The Tunnel Ridge Clean Coal Conveyor Upgrade

The U.S. coal industry frequently relies on infrastructure that was constructed 30 or 40 years ago. Conveyors supported in steel tubes or trusses exposed to the corrosive effect of coal, water and the environment are used to transport the coal to market. As these conveyors and structures age, it is vital that they be inspected and maintained to ensure they can continue to function safely. This can be particularly challenging to accomplish while not impacting the operation of the mine. The inspection and structural upgrade of the clean coal conveyor at Alliance Resource Partners’ Tunnel Ridge mine provides an example of how this can be efficiently and cost effectively achieved with minimal impact to production.

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Using CPDM Dust Data

By Emily Haas, Dana Willmer and JJ Meadows

A major part of the newly updated dust regulation requires mine operators to begin collecting respirable dust samples using Continuous Personal Dust Monitors (CPDMs) for designated occupations (DO) and “other” designated occupations (ODO) beginning February 1. With the regulation now in place, mine operators, mine-workers and stakeholders are each responsible for various tasks to ensure an appropriate amount of CPDM 3700 samples are completed per quarter.

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Keeping Mine Hoists Healthy

Shallow shaft or deep, a mine’s hoist machinery needs regular care and inspection

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Combining the Benefits of Dry and Liquid Agents for a Better Fire Suppression System

In the fire suppression industry, some have begun claiming that a liquid-only system is superior to a dual-agent system. The primary reason for this stance is the simplicity factor of using only one agent. However, this line of thought neglects to consider the fact that liquid-only systems needlessly sacrifice the benefits of A:B:C dry agent for the mere purpose of a marketing campaign.

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