Sewage Sludge

{
  "id": "MLC-T-ENV-025341",
  "term": "Sewage Sludge",
  "field": "Environment",
  "definition": "1. Sludge produced at a Publicly Owned Treatment Works, the disposal of which is regulated under the Clean Water Act.\n\n2. Any solid, semisolid, or liquid residue removed during the treatment of municipal wastewater or domestic sewage. Sewage sludge includes solids removed during primary, secondary, or advanced wastewater treatment, scum, septage, portable toilet pumpings, type III marine sanitation device pumpings (33 CFR Part 159), and sewage sludge products. Sewage sludge does not include grit or screenings, or ash generated during the incineration of sewage sludge. Also referred to as biosolids.\n\n3. Any solid, semi-solid, or liquid residue removed during the treatment of municipal waste water or domestic sewage. Sewage sludge includes, but is not limited to, solids removed during primary, secondary or advanced waste water treatment, scum, septage, portable toilet pumpings, Type III Marine Sanitation device pumpings (33 CFR part 159), and sewage sludge products. Sewage sludge does not include grit, screenings, or ash generated during the incineration of sewage sludge.[40 CFR 501.2 (CFR 2013)]\n\n4. Solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in a treatment works. Sewage sludge includes, but is not limited to, domestic septage; scum or solids removed in primary, secondary, or advanced wastewater treatment processes; and a material derived from sewage sludge. Sewage sludge does not include ash generated during the firing of sewage sludge in a sewage sludge incinerator or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works.[40 CFR 503.9 (CFR 2013)]\n\n5. Sewage sludge as defined in § 503.9(w) of this chapter that contains < 50 ppm (on a dry weight basis) PCBs.\n\n6. Any solid, semisolid, or liquid residue removed during the treatment of municipal wastewater or domestic sewage. Sewage sludge includes solids removed during primary, secondary, or advanced wastewater treatment, scum, septage, portable toilet pumpings, type III marine sanitation device pumpings (33 CFR Part 159), and sewage sludge products. Sewage sludge does not include grit or screenings, or ash generated during the incineration of sewage sludge. Also referred to as biosolids. [40 CFR 122.2]\n\n7. Solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in a treatment works. Sewage sludge includes, but is not limited to, domestic septage; scum or solids removed in primary, secondary or advanced wastewater treatment processes; and a material derived from sewage sludge. Sewage sludge does not include ash generated during the firing of sewage sludge in a sewage sludge incineration unit or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works.\n\n8. Any solid, semi-solid, or liquid residue removed during the treatment of municipal waste water or domestic sewage. Sewage sludge includes solids removed during primary, secondary, or advanced wastewater treatment, scum, septage, portable toilet pumpings, type III marine sanitation device pumpings (33 CFR Part 159), and sewage sludge products. Sewage sludge does not include ash generated during the firing of sewage sludge in a sewage sludge incinerator or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works.\n\n9. A semi-solid residue from any of a number of air or water treatment processes. When treated and processed, sewage sludge becomes a nutrient-rich organic material called biosolids.",
  "subject": "General environmental",
  "see_also": [
    "Municipal Sludge",
    "Biosolids"
  ],
  "references": [
    "Terms of Environment",
    "40 CFR 122.2",
    "40 CFR 122.2 (CFR 2013)",
    "40 CFR 257.2 (CFR 2013)",
    "40 CFR 761.3 (CFR 2013)",
    "Pretreatment Acronyms and Glossary",
    "40 CFR 62.16045 (CFR 2018)",
    "NPDES Permit Writers Glossary; NPDES Permit Writers Manual Glossary",
    "Report on the Environment (ROE) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/sewage-sludge/"
}