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KMID : 0382420030290010028
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Korean Journal of Environmental Health Society
2003 Volume.29 No. 1 p.28 ~ p.33
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Small Sewage Treatment Using Septic Tank and Sand Trench
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Park Young-Seek
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Abstract
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This study was carried out to treat sewage using sand trench combined with septic tank process in rural areas. In order to find optimum parameters, design and operation mode was changed from Run I to Run 4. In order to facilitate nitrification and T-P removal. ditffuser and iron plate was installed in the 3rd trench of Run 2 period. The septic tank played a role as pre-application process of sand trench system. the removal efficiencies of COD. NH₄-N, T-P at steady state were 94.6%. 87.9% and 54.5%. respectively. Addition of diffuser and iron plate in the 3rd trench has increased the removal efficiencies of the NH₄-N and T-P. In this system. denitrification were not occurred because of the high DO.
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