This exercise was conducted on latrine numbers 4 and 10 in Namawala village. These latrines were constructed in may and june 2010 and currently have 6 and 15 users respectively. The primary activity in decommissioning the used tank in latrine #4 involved incinerating dry rice husk spread over the feaces as a way of sterilization. The conditions in the collection tank were sufficiently dry to enable this. However, burning had to be done twice before the rice husks combusted fully.
Activity in latrine # 10 comprised mixing in the rice husk shell as the conditions in the tank were very soggy. No burning of rice husks was done in this case.
An observation made was for the compost chambers it is advantageous to have unlined inner walls and an earthern floor. This allows entry of worms and ants whose action on the feaces enhances its transformation to compost. Latrine number 4 had a thin layer of soil over the feaces and a thriving ant colony in the pit. Latrine number 10 had several worms whose habitat was in the joints of the brick lined walls of the pit.