Main Title |
Servo Controlled Optimization of Nitrification-Denitrification of Wastewater in Soil. |
Author |
Enfield., Carl G. ;
|
CORP Author |
Robert S. Kerr Environmental Research Lab., Ada, Okla. |
Year Published |
1977 |
Report Number |
EPA/600/J-77/115; |
Stock Number |
PB-278 584 |
Additional Subjects |
Nitrificati0n ;
Electrochemistry ;
Sewage treatment ;
Waste water ;
Samples ;
Performance evaluation ;
Trickling filtration ;
Nitrogen ;
Soils ;
Laboratory equipment ;
Design criteria ;
Reprints ;
Land disposal ;
Denitrification
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-278 584 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
5p |
Abstract |
Based on potentials of Platinum electrodes in conjunction with a Calomel reference electrode, a servo controller was used to meter trickling filter secondary wastewater application to soil columns. The controller 'optimized' denitrification by adjusting the frequency of application as a function of the potential voltage observed 6 cm below the soil surface and duration of each application as a function of the potential 30 cm below the surface of four Chigley gravelly loam soil columns. Digested municipal wastewater sludge was added to 3 of the 4 columns at a rate of 7.5 metric tons (carbon)/hectare in an upper 30 cm layer of the profile. The servo controller applying wastewater to the column with no sludge requested wastewater continuously. This column converted essentially all TKN-N to NO3-N. The conversion of TKN to NO3 took place in the upper 3 cm of the profile. Under the experimental conditions, the disappearance of solution N in the column without sludge was about 45%. Addition of sludge to the profile increased the apparent denitrification such that the total N removal was greater than 90%. |
Availability Notes |
Pub. in Jnl. of Environmental Quality, v6 n4 p456-458, Oct-Dec 77. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Servo Controlled Optimization of Nitrification-Denitrification of Wastewater in Soil. |
PUB Date Free Form |
1977 |
Category Codes |
7D; 14B; 8M; 68D; 99F; 48E |
NTIS Prices |
Not available NTIS |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
323736882 |
Origin |
NTIS |
Type |
CAT |