||Ultrafiltrative Dewatering of Spent Powdered Carbon.
Desaulnier, C. W. ;
Hausslei, R. W. ;
||Amicon Corp., Lexington, Mass.
||FWQA-17020-DBA; 05158,; 17020 DBA 03/70
( Activated carbon treatment ;
( Sewage treatment ;
Activated carbon treatment) ;
( Activated carbon ;
Cost estimates ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||Spent powdered activated carbon from secondary effluent treatment has been successfully dewatered by continuous membrane ultrafiltration. 5 and 10% carbon solids concentration slurries, using a laboratory size thin channel (0.1 sq ft membrane area), have been dewatered by continuous ultrafiltration to solids levels of 25 to 30%. Dewatering rates ranged between 50 and 100 gal/sq ft day at transmembrane pressures of from 10 to 50 psi during runs as long as 9 days, and product water was invariably free of any suspended carbon solids. The cost of membrane ultrafiltration depends upon the membrane life, and at membrane flux rates of 50 gal/sq ft day the cost of dewatering carbon from 10 to 20% solids is $0.0015 per pound of carbon with a membrane life of six months, and $0.0035 per pound with a membrane life of only one month. At the present no conclusive data on membrane life is available, but estimates of between 1 and 6 months are quite common and seen to be reasonable. (WRSIC abstract)
||Paper copy available from SOD: $0.70 as I67.12/4:ORD17020DBA03/70.
|NTIS Title Notes
||Water pollution control research series.
|PUB Date Free Form