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Emergency Sanitation: Faecal Sludge Treatment Field-work Summary

Three Emergency Faecal Sludge Treatment Options have been investigated through small scale experiments using Fresh Faecal Sludge over 3 months (Jan–April 2014) in Blantyre, Malawi.

Preliminary testing has indicated that based on the small-scale field trials, Urea Treatment, Hydrated Lime Treatment and Lactic Acid Fermentation are promising low-tech faecal sludge treatment technologies and are all potentially applicable to emergency situations. The sludge used in the trials was sourced from Bangwe Market Pit Latriens and extracted using a desludging technique involving high pressure fluidization and a vaccuum pump. The characteristics of the Faecal sludge collected from the Bangwe Market Pit Latrines each week varied considerably reflecting the heterogeneous nature of faecal sludge as well as the influence of external factors such as climatic conditions. Based on the small-scale field trials all three treatment processes are able to satisfy the key safety, sanitation and robustness criteria for emergency faecal sludge treatment processes