Pretreatment

{
  "id": "MLC-T-ENV-022029",
  "term": "Pretreatment",
  "field": "Environment",
  "definition": "1. Methods used by industry and other non-household sources of wastewater to remove, reduce, or alter the pollutants in wastewater before discharge to a POTW.\n\n2. The treatment of wastewater to remove or reduce contaminants prior to discharge into another treatment system or a receiving water.\n\n3. The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a publicly owned treatment works.\n\n4. The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater to a less harmful state prior to or in lieu of discharging or otherwise introducing such pollutant into a publicly owned treatment works.\n\n5. Processes used to reduce, eliminate, or alter the nature of wastewater pollutants from non-domestic sources before they are discharged into publicly owned treatment works (POTWs).\n\n6. The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater before or in lieu of discharging, or otherwise introducing, such pollutants into a POTW.\n\n7. Reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a POTW. The reduction or alteration may be obtained by physical, chemical, or biological processes, process changes, or by other means, except as prohibited by 40 CFR part 403.\n\n8. Reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a POTW. The reduction or alteration may be obtained by physical, chemical or biological processes, process changes or by other means, except as prohibited by § 403.6(d). Appropriate pretreatment technology includes control equipment, such as equalization tanks or facilities, for protection against surges or slug loadings that might interfere with or otherwise be incompatible with the POTW. However, where wastewater from a regulated process is mixed in an equalization facility with unregulated wastewater or with wastewater from another regulated process, the effluent from the equalization facility must meet an adjusted pretreatment limit calculated in accordance with § 403.6(e).\n\n9. Reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater before or in lieu of discharging, or otherwise introducing, such pollutants into a POTW. [paraphrased from 40 CFR 403.3(s)]\n\n10. The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a POTW.\n\n11. Pretreatment is a NPDES permit that prescribes for the reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a publicly owned treatment works [40 CFR 403.3(q)].",
  "subject": "Water",
  "references": [
    "Environmental Issues Terms & Acronyms",
    "Sediment Total Maximum Daily Loads (TMDLs) Glossary",
    "40 CFR 403.3(q)",
    "Urban Watershed Management Research Terminology",
    "Terms of Environment",
    "paraphrased from 40 CFR 403.3(s)",
    "40 CFR 125.58 (CFR 2013)",
    "40 CFR 403.3 (CFR 2017)",
    "Pretreatment Acronyms and Glossary",
    "NPDES Permit Writers Glossary; NPDES Permit Writers Manual Glossary",
    "How's My Waterway Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/pretreatment/"
}