SYMPOSIA PAPER Published: 01 January 1997
STP13788S

Long-Term Effluent Absorption Rates of a Serially Loaded Septic Tank Filter Field

Source

The objectives of this research were to determine the hydraulic performance of a serially loaded filter field with time, and to test the hypothesis that upper trenches of serially loaded filter fields build crusts until they transmit little or no effluent. This study was conducted for 8 years on a serially loaded filter field with an average effluent load of about 1125 L d-1. The mean summer effluent absorption rates (EARs) declined from 11.8 cm d-1 in year 1 to near stable EARs of 3.33 to 2.97 cm d-1 in years 5 through 8, thus indicating that progressive hydraulic failure in the soil did not continue or became negligible. Failure did occur, due to the design of the true serial system, in the form of blockage in the pipes of the upper trenches.

Author Information

Owens, PR
University of Arkansas, Fayetteville, AR
Rutledge, EM
University of Arkansas, Fayetteville, AR
Roark, C
Natural Resources Conservation Service, Morrilton, AR
Gross, M
University of Arkansas, Fayetteville, AR
Wolf, D
University of Arkansas, Fayetteville, AR
McNew, R
University of Arkansas, Fayetteville, AR
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Details
Developed by Committee: D18
Pages: 63–71
DOI: 10.1520/STP13788S
ISBN-EB: 978-0-8031-5376-9
ISBN-13: 978-0-8031-2420-2