FSTP feasibility (Burkina Faso)

The management of faecal sludge is a public health issue in many medium-sized African cities, where autonomous sanitation appears to be the most appropriate solution. The general objective of this study is to contribute to the establishment of a faecal sludge treatment plant in the municipality of Boromo and Siby’s. To do this, an inventory of the management of faecal sludge was carried out through a documentary research, surveys and observations in the field. A treatment system was then proposed, based on a multi-criteria analysis, and then sized considering the characteristics and quantity of sludge produced. Finally, an economic study and a management method of the sector were carried out through the estimation of the costs of realization and the expected benefits. From the data collected, it appears that 87%,64 of the concessions have latrines at home, with a predominance of masonry pit latrines (51%). The most common emptying method is manual emptying (78%) with rates between 5,000 and 10,000 FCFA/m3. After emptying, the sludge is dumped directly in the fields or transported to an undeveloped official dumping site, presenting a high risk of groundwater contamination. Aware of this situation, a station was therefore sized for a daily flow of 27.25 m3 of raw sludge to be treated. The treatment option chosen is that of unplanted drying beds followed by the treatment of percolate in lagoons and co-composting of dried sludge with household organic waste. The cost of building this station was estimated at 215,385,980 FCFA. This study is thus a contribution to the establishment of a management system for faecal sludge in the municipalities.