Objectives To study the effects of the three-squared septic tank latrine and double-jar latrine with different wash-down toilets mode on the night soil innocuous treatment.
Methods During 2011-2012, in the programs of sanitary latrines in rural areas in our province, two villages with different wash-down toilets modes are selected as the control group, comparing water saving toilet with non-water saving toilet respectively. To monitor the residence time of tank 1 grid feces of the three-squared septic tank, the residence time of the front urn feces in the double-jar latrine, as well as the data on the daily amount of wash-down.
Results The amount of wash-down with water-saving is just 21%~23% of that with non-water-saving toilet; the tank 1 grid feces of three-squared septic tank with water-saving model stay more than 20 days, the residence time of the front urn feces in the double-jar latrine is 30 days or more, which all achieve the harmless processing technical requirements. However, night soil innocuous treatment of the two toilets without water-saving mode did not meet the technical requirements.
Conclusions Sanitary latrines in rural areas construct the wash-down three-squared septic tank and the double-jar latrine toilets, the night soil innocuous treatment are very effective when toilet choosing the water-saving mode, and which can ensure safe health standards.
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