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KMID : 0383919770140000189
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Report of National Institute of Health
1977 Volume.14 No. 0 p.189 ~ p.201
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Night-soil treatment for rural villages-Effectiveness of the three0chambered septic toilet tanks in interrupting life cycle of intestinal parasites.
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金東燦/Kim, Dong-Chan
李溫永/金舜姬/韓義正/金南洙/Lee, On-Young/Kim, Soon-Hit/Han, Eui-Jung/Kim, Nam-Soo
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Abstract
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It has been emphasized that elimination of parasitic eggs is necessary to bring about a successful campaign in reducing intestinal parasite infections, which are at present prevalent throughout the country. As an approach to achieve this goal, a further study was conducted to improve toilet tanks of the rural houses to bring an effective means in eliminating viable parasite eggs during the period of storage of night-soil. The following results were obtained.
1. The rate of destruction of Ascaris eggs in night-soil was increased in proportion to temperature within 30℃., although no lethal effect was seen at lower temperatures during the first six months.
2. Degeneration of Ascaris eggs in night-soil appeared to occur only during active cleavage of egg cells usually over 20℃. within the periods of several months. The Ascaris eggs in night-soil were destroyed completely within four months at 20℃., two months at 25℃. and one months at 30℃.
3. The period required in complete destruction of Ascaris eggs in night-soil was shorter in septicized night-soil than in the fresh night-soil at 25℃. However, no such accelerated lethal effect was seen at lower temperature.
4. The three-chambered septic toilet tanks was evaluated to be most reasonable and acceptible structure. This system can effectively break life cycle of common intestinal parasites throughout a year even under climatic condition of northern part of the Republic of Korea where lowest temperature ranges -15˚∼-17℃. during winter season which last for several months.
5. The three-chambered septic toilet tank was more effective and simpler in structure than the feces-urine separation system of three-chambered septic toilet tanks.
6. The three-chambered septic toilet tanks were evaluated to be effective in control of enteric bacterial infection as well.
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