Emptying On-Site Excreta Disposal Systems - Field Tests with Mechanized Equipment in Gaborone (Botswana)

This report describes field tests of three prototype pit latrine emptying systems, a hand operated diaphgram pump and two vacuum tankers in regular service in Africa. Numerous sludge samples were taken and their viscosities and compositions measured to establish limits for the types of sludges that can be removed by each system.