sludge "sludge" means sediment, dregs or waste formed from the production process or from waste treatment system whether in the form of semi solid, soft or hard; PU(A) 104/2004 - ENVIRONMENTAL QUALITY (DIOXIN AND FURAN) REGULATIONS 2004 2. Interpretation.
sludge "sludge" means any deposit of particulate matter settled from a liquid, including deposit resulting from physical, chemical, biological or other treatment of sewage; PU(A) 432/2009 - ENVIRONMENTAL QUALITY (SEWAGE) REGULATIONS 2009 2. Interpretation
sludge "sludge" means any deposit of particulate matter settled from any liquid, including deposit resulting from physical, chemical, biological or other treatment of water or industrial effluent or mixed effluent; PU(A) 434/2009 - ENVIRONMENTAL QUALITY (INDUSTRIAL EFFLUENT) REGULATIONS 2009 2. Interpretation