||Ammonia removal from wastewater by ligand exchange /
Smith, Lloyd M. ;
Lyerly, George A. ;
Dooley., Marilyn E.
||Gillette Co. Research Inst., Rockville, Md.;Municipal Environmental Research Lab., Cincinnati, Ohio.
|| National Environmental Research Center, Advanced Waste Treatment Research Laboratory,
Sewage--Purification--ion exchange process.
Sewage treatment ;
Ion exchangers ;
Water pollution control ;
Columns(Process engineering) ;
Zirconium oxides ;
Graphic methods ;
Water analysis ;
Laboratory equipment ;
Ammonia stripping ;
Tertiary sewage treatment
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The use of a ligand exchange process to remove ammonia from secondary treated municipal wastewater was examined in a laboratory study. A ligand exchanger consisting of copper ions retained on a hydrous zirconium oxide ion exchanger was examined. Its ability to remove ammonia and subsequent regeneration with low pressure steam was evaluated. The main objective of the program was to optimize the conditions to achieve maximum efficiency and to determine the effect of other wastewater constituents on the process. Initially, the capacity of the hydrous zirconium oxide for copper was examined to determine the conditions for maximum copper loading. The capacity of this ligand exchanger for ammonia at various pH's was measured. The effect of temperature and time on steam regeneration of the exhausted exchanger was obtained. The effect of specific inorganic ions on the process and the effect of organics on the ligand exchange process with steam regeneration was investigated. Exchange capacity after repeated loading and recycling was measured. Finally, the process performance was demonstrated using lime clarified, secondary municipal effluent.
"October 1974." "To be presented at the 67th Annual Meeting, AIChE, Washington, D.C., December 1-5, 1974." Microfiche.