TREATMENT OF WASTEWATER CONTAINING CITRIC ACID AND TRIETHANOLAMINE; PATENT

Process for treating wastewater containing citric acid and triethanolamine and heavy metals by subjecting the wastewater to treatment with hydrogen peroxide and ultraviolet light (UV) and in the presence of ferrous ion as catalyst, to substantially decompose the citric acid and the triethanolamine. Wastewater generated from ship bilge cleaning and containing up to 10% citric acid or up to 5% triethanolamine, or mixtures thereof, can thus be subjected to UV/H202 treatment with ferrous ion in a concentration thereof of about 20 to about 100 ppm, without forming chelates of iron and other heavy metals with citric acid or with triethanolamine, to decompose up to 90% or more of the citric acid and triethanolamine.

• Supplemental Notes:
  • Filed 24 Feb 92 patented 18 Aug 92; Supersedes PAT-APPL-7-840 207.; This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, DC 20231 $1.50.; Patent
• Corporate Authors:

  Department of the Navy

  Washington, DC  United States 
• Authors:
  • Pan, B Y
  • Yen, T F
  • Chen, J R
• Publication Date: 0

Language

• English

Media Info

• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Bilges; Catalysts; Cleaning; Heavy metals; Hydrogen; Hydrogen peroxide; Iron; Light; Metals; Patents; Sewage treatment; Ships; Wastewater
• Uncontrolled Terms: Citric acid; Water treatment
• Old TRIS Terms: Peroxides
• Subject Areas: Maintenance and Preservation; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00666634
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: PAT-APPL-7-840 207; PATENT-5 139 679
• Files: TRIS
• Created Date: Oct 3 1994 12:00AM