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http://dx.doi.org/10.5338/KJEA.2006.25.1.014

Optimum Depth and Volume Ratio of Aerobic to Anaerobic Bed for Development of Small-Scale Sewage Treatment Apparatus by Natural Purification Method  

Seo, Dong-Cheol (Division of Applied Life Science, Gyeongsang National University)
Park, Mi-Ryoung (Division of Applied Life Science, Gyeongsang National University)
Kwak, Nae-Woon (Division of Applied Life Science, Gyeongsang National University)
Hwang, Ha-Na (Division of Applied Life Science, Gyeongsang National University)
Lee, Hong-Jae (Department of Environmental Engineering, Jinju National University)
Cho, Ju-Sik (Division of Applied Life and Environmental Sciences, Sunchon National University)
Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University)
Publication Information
Korean Journal of Environmental Agriculture / v.25, no.1, 2006 , pp. 14-24 More about this Journal
Abstract
To develop small-scale sewage treatment apparatus for detached house of agricultural village, a small-scale sewage treatment apparatus by natural purification method that consisted of aerobic and anaerobic bed was constructed. To reduce the area of a sewage treatment apparatus, four different fitter media were used and each filter medium was coarse sand, broken stone, steel slag, and mixed fitter media (coarse sand : broken stone : steel slag = 1:1:1). The efficiency of sewage treatment according to the depth of aerobic and anaerobic bed and the volume ratio of aerobic to anaerobic bed were investigated in small-scale sewage treatment apparatus. The removal rate of pollutants according to the depth of aerobic and anaerobic bed in small-scale sewage treatment apparatus was high in the order of 50 cm < 70 cm < 90 cm. The removal rate of pollutants according to the ratio of aerobic to anaerobic bed in small-scale sewage treatment apparatus was high in the order of 1:1 < 1:2 $\fallingdotseq$ 1:3. Under the optimum conditions, removal rate of BOD, COD, SS, T-N and T-P were $98{\sim}99,\;95{\sim}97,\;99,\;65{\sim}66\;and\;96{\sim}99%$ respectively, in small-scale sewage treatment apparatus.
Keywords
natural purification method; sewage treatment apparatus; depth; volume ratio; aerobic bed; anaerobic bed; coarse sand; broken stone; steel slag; mixed filter media;
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