New anthracite media has to ...
Published by Govindasamy Manickam, GM at Adani Power Ltd.
New anthracite media has to be air scored and back washed repeatedly till it is free from loose coal. High chlorine content may also may damage the anthracite media and give this problem. It is better to use graded sand and gravel which avoids the above problem.
Any colloids/particles including powdered coal increases SDI.