Contribution to the Management and Valorization of Fecal Sludge in the Urban Commune of Kissidougou, Mamou, Republic of Guinea

Abstract

Background and Aim : This research is a continuation of our work on the management and recovery of domestic waste. Its general objective is to take stock of the fecal sludge in the urban commune of Kissidougou, with a view to proposing appropriate treatment techniques. So, to achieve this objective, we carried out a field survey in the twenty-four neighborhoods of the urban commune, where we met ten households per neighborhood, or two hundred and forty households. Method : The specific production methods, characteristics of sanitation works, demand for mechanical emptying, and turnover of the emptying operator were used Results : The results obtained show that the housing typology of Kissidougou is characterized by a dominance of low standing estimated at 61%, followed by 37% of medium standing compared to only 2% of traditional type. Wastewater and excreta sanitation works are mainly traditional with 61%, followed by septic tanks with 14%, 13% improved latrines, 10% without specific purpose and only 1% VIP. The frequency of emptying is estimated at 40% for between 2 to 5 years, 29% (more than 2 years), 19% of the population surveyed, once the latrines are full, they give up; 7% have not changed their oil for 10 years; Likewise, 51% of the population do manual emptying; while 43% have an imprecise method of emptying their works; 4% empty their works mechanically and only 1% (other and not yet emptied). For a population of nearly 110000 inhabitants, the estimated annual specific production of faecal sludge is 64240 m3/year, or a specific production depending on households of 3014 m3/year. The quantity of sludge mechanically drained per year is 0.4m3/year; that manually is 6.24 m3/year. Thus, the characteristic of the sanitation works gives 314.12 m3/year and that of the operation of the mechanical emptying operator is 730 m3/year. Conclusion : The results show that 30% of the population do not know how much they paid to empty their latrines ; while 18% say they paid 300000 GNF, 13% paid 350000 GNF ; 10% invested 450000 GNF for emptying their latrines, 8% of the population paid 400000 GNF and others 500000 GNF ; 6% of respondents said nothing about the emptying situation ; 5% pay 650000 GNF and 4% do their emptying at 600000 GNF. Keywords: Faecal sludge, sanitation works, Management and recovery