Accession Number : ADD015451

Title :   Treatment of Wastewater Containing Citric Acid and Triethanolamine.

Descriptive Note : Patent, Filed 24 Feb 92, patented 18 Aug 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Pan, Bingham Y ; Yen, Teh F ; Chen, Jau R

Report Date : 18 Aug 1992

Pagination or Media Count : 5

Abstract : 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.

Descriptors :   *WASTE WATER, *PATENTS, *WATER TREATMENT, BILGES, CATALYSTS, CITRIC ACID, CLEANING, HEAVY METALS, HYDROGEN, HYDROGEN PEROXIDE, IRON, LIGHT, METALS, PEROXIDES, SHIPS

Subject Categories : Water Pollution and Control
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE