Featured in Bharatia | Water Intelligence — Issue 1, 02 September 2026 The Language of Sludge Sludge management has its own technical vocabulary — and terms that sound similar can describe very different materials, standards and end uses. Understanding these distinctions is particularly important as the sector moves from simply disposing of sludge towards treatment, resource recovery and productive use. Sludge The semi-solid material generated during wastewater treatment. Its