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DOI : ,    Vol.5, No.2, 29 ~ 37, 1997
Title
The application of domestic wastewater treatment in small county by septic tank combinded with soil trench process
이병헌Byung Hun Lee,강임석Lim Seok Kang,김시준Shi Jun Kim,이용화Yong Hwa Lee
Abstract
Treatment of domestic wastewater using septic tank combined with soil trench process can be a cost effective alternative in rural areas. Technology for such small on site wastewater treatment plants will contribute to significant environmental protection as long as people live in rural areas. The modified septic tank which consisted of septic tank and anaerobic filter (rice hulls and sawdust media) had efficiencies for a preapplication process of soil subsurface system. The soil column test showed that the soil depth required for 90 percent removal efficiencies of pollutants would be over 50㎝. Domestic wastewater having six months of mean COD coccentration of 450-550 ㎎/L, NH₄^+-N of 45-70 ㎎/L and PO₄^(3-)-P of 5-10 ㎎/L. The average removal of organics and nutrients in soil permeating water based on the original wastewater were purified this process at the rate of 90% removal of COD, 60% removal of NH₄^+-N and 80% removal of PO₄^(3-)-P.
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