In addition to the raised pH, the adding of ash also reduces the moisture content and, by that, the odour in and around the toilet. In general, the toilets with solar-heated lids had lower moisture content in the faecal material than the toilets without. As regards the temperature, we did not see a clear difference between the outdoor temperature and that of the faecal material. The effect of the solar heating on temperature is difficult to evaluate when the four toilets without a solar-heated lid were built in the shade and others were built more or less in the sun. When comparing the time for die-off of the microorganisms, none of the existing constructions of toilets are better than the others.
All families seem to be content with their latrine in general.
A negative opinion shared by many users was that the toilet is very hot during parts of the day. In our study the bacteriophages were reduced rapidly. During the workshop held at the Pasteur Institute before this study begun, a reduction of at least 4 log 10 was proposed for the bacteriophages. Eight of the twelve toilets reached this goal after less than two months. In the seven toilets with a rapid reduction of the Ascaris eggs a storagetime of three months could be enough.