Residuals (Waste)

{
  "id": "MLC-T-ENV-024051",
  "term": "Residuals (Waste)",
  "field": "Environment",
  "definition": "1. Any liquid or solid material containing Table 9 compounds that is removed from a wastewater stream by a waste management unit or treatment process that does not destroy organics (nondestructive unit). Examples of residuals from nondestructive wastewater management units are: the organic layer and bottom residue removed by a decanter or organic-water separator and the overheads from a steam stripper or air stripper. Examples of materials which are not residuals are: silt; mud; leaves; bottoms from a steam stripper or air stripper; and sludges, ash, or other materials removed from wastewater being treated by destructive devices such as biological treatment units and incinerators.\n\n2. Defined in § 63.111, except that when the definition in § 63.111 uses the term “Table 9 compounds,” the term “organic HAP listed in Table 5 of subpart U of this part” shall apply, for the purposes of this subpart.\n\n3. Solids generated or retained during the treatment of wastewater. They include trash, rags, grit, sediment, sludge, biosolids, septage, scum, and grease, as well as those portions of treatment systems that have served their useful life and require disposal, such as the sand or peat from a filter. Because of the different characteristics of residuals, management requirements can differ as stipulated by the appropriate federal regulations.",
  "subject": "Environmental events",
  "references": [
    "40 CFR 63.111 (CFR 2018); 40 CFR 63.101 (CFR 2024)",
    "40 CFR 63.482 (CFR 2018); 40 CFR 63.482 (CFR 2024)",
    "Septic Systems Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/residuals-waste/"
}