||Zinc precipitation and recovery from viscose rayon waste water. /
Roc, David M. ;
||American Enka Company. Central Engineering Department.
|| [Environmental Protection Agency, Water Quality Office] : For sale by the Supt. of Docs., U.S. G.P.O.,
||EPA-WQO-12090-ESG; 02364,; 12090-ESG-01/71
Textile waste. ;
Rayon industry and trade. ;
( Zinc sulfates ;
Chemical removal(Water treatment)) ;
( Textile industry ;
Industrial waste treatment) ;
( Industrial waste treatment ;
Zinc sulfates) ;
( Materials recovery ;
Zinc sulfates) ;
Materials recovery ;
Spinning(Staple fibers) ;
Textile processes ;
Pilot plants ;
Cost estimates ;
Operating costs ;
Water pollution control ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||viii, 86 pages : illustrations ; 28 cm.
||A zinc recovery system was developed to recover zinc from dilute zinc sulfate lost both when acid spun yarns are washed and at various stages in the spinning process. The process included neutralization of the waste stream to pH 6.0, sedimentation of insolubles, crystallization of zinc hydroxide in a high pH environment, sedimentation of zinc hydroxide and solubilization of the zinc with sulfuric acid. A pilot plant was constructed and operated. It obtained 98-99% removal efficiency. The zinc hydroxide sludge was easily concentrated. Operating and maintenance costs were estimated. Recovery and sale of 2000 lbs of zinc daily assures recovery of these costs.
||"12090ESG01/71." Includes bibliographical references. Microfiche.
||Paper copy available from GPO $1.00 as EP2.10:12090ESG-01/71.
|Corporate Au Added Ent
||United States. Environmental Protection Agency. Water Quality Office.
|PUB Date Free Form
|Series Title Traced
||Water pollution control research series
|OCLC Time Stamp
|OCLC Rec Leader
||01317nam 2200313Ka 45020