Rice husking residues constitute real bioresources which the development could contribute to improving the living conditions of populations and reducing pressure on forest resources. This study examined the management of rice husking residues in the Lôh-Djiboua region. The survey and field observation carried out showed that the Lôh Djiboua region produces an average of 21,262.4 tonnes of rice per year, including 8,711.9 tonnes in Divo, 9,625.5 tonnes in Lakota and 2,925 tonnes in Guitry. The main residues from husking rice are husks and bran. The average annual bale quantities recorded are 2744.3 ± 446.2 tonnes at Divo, 3032.1 ± 1550.7 tonnes at Lakota and 921.4 ± 249.6 tonnes at Guitry. The average annual bran masses are 304.9 ± 49.6 tonnes, 336.89 ± 172.3 tonnes and between 102.4 ± 27.7 tonnes respectively at Divo, Lakota and Guitry. Rice husking residues produced in the mills are collected by households (0 to 18.9%), pig farmers (8.1 to 27.8%), poultry farmers (45.9 to 55.5%), farmers (16.7 to 28.1%) and fish farmers (2.7 to 3.1%). These use them as fuel in households, as feed and bedding in poultry and pig farming, as feed in fish farming and as fertilizer after calcination in agriculture. There is a low rate of use of rice husking residues as fuel in households in the studied areas (1 to 4%).

Sanitation and health of populations regarding malaria and diarrhea syndromes were studied in precarious neighborhoods of Abobo (Abidjan, Côte d’Ivoire). Globally, 587 concessions were sampled with 14 232 people. Human excreta are essentially disposed in autonomous sanitation systems (8-88%). The grouping of neighborhoods according to their sanitation gave three entities: (Anonkoua and Abobo PK-18) (Sagbé, Avocatier, M'Ponon and Jean-Tahi) and (Abobo-Baoulé). People have access to the drinking water from SODECI for various usages depending on the use and the season. Drinking water from SODECI is the only one used in the dry season, but it’s partially substituted by rainwater during the rainy season for bath, clothes washing and dishes. However, it is exclusively used for drinking regardless of the season. The classification of precarious neighborhoods based on water use gives five groups: (Anonkoua, Avocatier) (Sagbé, Abobo PK-18), (Jean-Tahi) (M'Ponon) and (Abobo-Baoulé). Population health in these areas is worrying with 47% of patients (35% of malaria syndrome cases and 12% of diarrhea syndrome cases). The young population ([0-8 years [) is the most affected, with 25% of malaria syndrome cases and 34% of diarrhea syndrome cases.