TY  - SER
AU  - Tran Yem
AU  - Nguyen,Cong Thanh
AU  - Samorn Muttamara,
AU  - Chongrak Polprasert,
ED  - Taiwan Power Company, R.O.C.,
TI  - Effects of soil types on performance of septic tank/soil absorption system
T2  - Thesis
PY  - 1981///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Sewage
KW  - Purification
KW  - Rotating disc process
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development; Thesis (M.Sc.) - Asian Institute of Technology, 1981
N2  - The treatment capacity of septic tank effluent on four different soil  types was studied in controlled laboratory conditions, using four different  soil columns. The columns were dosed with different hydraulic loadings  depending upon the permeability of the soils used.  Experimental results demonstrated that soil depth and soil type play  an important role in determining the treatment capacity of effluent by soil.  The upper zone of 30 cm depth was found to be very effective for COD, sus-  pended solids, and nitrogen removal. Further increase in depth from 30 to  90 cm showed very less removal efficiency. The Thamuang clay loam and  Rangsit topsoil silt loam showed better COD, suspended solids, nitrogen  removal than Donmuang silt clay and Pattaya loamy sand. Both clay loam  and topsoil silt loam yielded about 77 to 85% suspended solid removal at  the depth 90 cm, whereas silt clay and loamy sand resulted in about 60 to 75% suspended solids at the same depth. About 70 to 85% COD and 64 to 75% nitrogen reductions were obtained in all soil columns at the depth of 90  and 150 cm.  Physical, biological, and excessive hydraulic loading factors were  identified as main factors of outlet and soil clogging.
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B21606
ER  -