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Development of Optimal Septic Tank in the Countries of Water Shortages
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 Title & Authors
Development of Optimal Septic Tank in the Countries of Water Shortages
Lim, Bong-Su; Jing, Hai-Long;
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This study was carried out to evaluate the performance of a lab-scale novel septic tank system for improving the conventional septic tank in the developing countries of water shortages. The lab-scale novel septic tank system consists of sepetic tank, aeration tank with HBC-ring, and sand filter. Optimum HRT was reguired about 1.5days to get a total COD removal efficiency of 90%, COD, BOD and SS removal efficiency was about 70%, 60%, and 85% in sepetic tank only. The structure of sepetic tank with two stages results in the high removal efficiency of organic matter. When sepetic tank, aeration tank, and sand filter were more than HRT 1.5days, 18hrs, and 12hrs, respectively, final effluent was less than 20 mg/L of BOD, 14 mg/L of SS, so that there is a high potential of its use for reusing water in flush toilet. There is no significant effect of HRT change on nutrient removal. Total nitrogen removal efficiency was about 40%, final effluent was 30~40 mg/L of TN, total phosphorus removal efficiency was about 11~25%, final effluent was 9~12 mg/L of TP. Because there is very small amounts of organic nitrogen and phosphorus in effluent, it was possible to reuse water for agricultural use.
Developing Countries of Water Shortages;Optimum HRT;Reusing Water in Flush Toilet;Septic Tank System;
 Cited by
American Public Health Association, American Water Works Association and Water Environment Federation (APHA, AWWA, and WEF). (2005). Standard Methods for the Examination of Water and Wastewater, 21th Ed., Washington D.C.

Choi, E. (2003). Disposal and Resources Recovery of Waste, Cheong Moon Gak Publishing Co., pp. 240-242. [Korean Literature]

Choi, E. S. (1978). Septic Tank Treatment: The Mechanism and Efficiency, Korea Society of Civil Engineers, 23(3), pp. 107-114. [Korean Literature]

Jang, H. S. (2013). Our Role and Poverty of A Gloval Village, Conference on Appropriate Technology in Environmental Application, Seoul, December 5, pp. 21-39. [Korean Literature]

Kim, D. K. (1998). Septic Tank Wastewater Treatment by Fixed Bio Film, Master Thesis, Graduate School, Chosun University. [Korean Literature]

Kim, H. T. (1984). Study on effect of HBC(Hanging Bio Contaetor) Process for Treatment of Sewage & Industrial Waste Water, Master Thesis, Industry Graduate School, Yonsei University. [Korean Literature]

Lee, W. Y., Kim, S. H., and Lim, B. S. (2014). Improvement of Zero Discharge Toilet for Developing Countries, Proceedings of Korean Society on Water Environment and Korean Society of Water and Wastewater Conference, Korean Society on Water Environment and Korean Society of Water and Wastewater. [Korean Literature]

Lim, B. S., Jung, K. H., and Wang, Z. J. (2007). Evaluation of the Septic Tank Performance in the Sewage Treatment Area and Suggestion of an Optimum Model, Journal of Korean Society on Water Environment, 23(3), pp. 403-409. [Korean Literature]

Lim, B. S., Kim, B. C., and Chung, I. (2012). Anaerobic Treatment of Food Waste Leachate for Biogas Production Using a Novel Digestion System, Environmental Engineering Research, 17(1), pp. 1-6.

Randall, C. W. (1988). York River Sewage Treatment Plant Biological Nutrient Removal Demonstration Project, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, U.S.A.

United Nations. (2011). The Millennium Development Goals Report 2011, New York, p. 55. [Korean Literature]