Main Title |
Combined Biological and Chemical Treatment for Phosphorus Removal. |
Author |
Mulbarge, Michael C. ;
Shifflet, Donald G. ;
|
CORP Author |
Robert A. Taft Water Research Center, Cincinnati, Ohio. |
Year Published |
1970 |
Stock Number |
PB-217 405 |
Additional Subjects |
( Sewage treatment ;
Chemical removal(Sewage treatment)) ;
( Chemical removal(Sewage treatment) ;
Phosphorus) ;
( Alums ;
Sewage treatment) ;
Precipitation(Chemistry) ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-217 405 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
11p |
Abstract |
Liquid alum and sodium aluminate were utilized for phosphorus removal at 1.0 and 0.2 million gal./day activated sludge municipal wastewater treatment plants. Phosphorus removals were determined at aluminum to phosphorus ratios up to a limiting point which exhibited a minimum total soluble phosphorus residual of about 1.0 mg./liter. More efficient use of chemical and higher phosphorus removal efficiencies are obtained in a multistage activated sludge system. The type of activated sludge system also influenced chemical phosphorus removals. Excessive effluent suspended solids were found to be more a function of the volatile solids produced to aluminum added ratio than of exceeding a given aluminum to phosphorus ratio or aluminum dosage. Batch studies indicate that aluminum as alum will outperform iron as ferric chloride on a performance/cost basis and that the best point of addition is just before solids-liquid separation. The considerations involved in this type of phosphorus removal system are discussed. (Author) |
Availability Notes |
Availability: Pub. in Chemical Engineering Progress. Symposium Series, v67 n107 p107-116 1970. |
PUB Date Free Form |
1970, |
Category Codes |
13B; 68D |
NTIS Prices |
PC A02/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326552788 |
Origin |
NTIS |
Type |
CAT |