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KMID : 0311219730040010088
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Yonsei Reports on Tropical Medicine
1973 Volume.4 No. 1 p.88 ~ p.94
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Treatment of Pathogens Found in Methane Gas Producing Toilet System
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Soh Chin-Thack
Ahn Yung-Kyum
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Abstract
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Human excreta was placed in a methane-gasproducing toilet system.
The ovicidal and bactericidal activities of the combination of ferrous sulfate and sodium nitrite were examined after mixing these chemicals with the effluent to which ascaris eggs, hookworm eggs and larvae, Salmonella typhi and E´cherichia coli had been added. The chemicals used were: 1.0~4.0% ferrous sulfate, 0.1~0.4% sodium nitrite. The period of experiment was during the summer months and in general the temperatures in the effluent tank were from 23˚~26℃.
1. All ascaris eggs were destroyed within 3 days, though 60~74% of the eggs in the control effluent tank survived as long as 8 weeks the time of the study.
2. Hookworm eggs were all destroyed within 2 days. Rhabditoid larvae of hookworm were killed within an hour under the same condition.
3. Escherichia coil were eliminated within a day, and Salmonella typhi within 3 days.
4. No harmful effect on vegetable growth was observed using the chemically treated effluent as fertilizer.
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