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Item type:Publication, Access status: with files , Implementing biowaste source segregation for sustainable decentralized composting schemes in Tiassalé, southern Côte d’Ivoire(Sage Publications, 2025-09); ; ; ; Research in sub-Saharan Africa has shown failures in most of municipal waste composting initiatives because of bad-quality composts due to the lack of biowaste source segregation. Until now, very few biowaste source-segregation initiatives have been carried out on this part of the world. This study aimed at assessing the biowaste sorting efficiency and the attitude of households towards a pilot biowaste source-segregation system linked to a decentralized composting plant in Tiassalé. For this purpose, the impurity rate of source-segregated biowaste was monitored through the first year of implementation. Then, a cross-sectional survey was conducted to evaluate households’ attitude. The results have shown that the average impurities rate in source-segregated biowaste was very low (1%). This finding was confirmed by the results of laboratory analysis which revealed a very low heavy metals (0.2, 12.4, 7.1 and 15.5 mg kg −1 DS for Cd, Cr, Ni and Pb, respectively) contamination in the compost produced. Regarding the acceptability of the source-segregation system, the results showed that the majority (75%) of the participants accepted the source-segregation system of biowaste and almost half (47%) of them were ready to pay for such a collection service. In conclusion, this study revealed that providing households with the needed municipal solid waste management infrastructures and rising awareness about biowaste source segregation are keys for the establishment of such a collection system in Tiassalé and similar urban areas. The findings also proved the effectiveness of biowaste source-segregation system in the production of high-quality compost.Publicationtype: Journal Article50 10 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Implementing biowaste source segregation for sustainable decentralized composting schemes in Tiassalé, southern Côte d’Ivoire(Sage Publications, 2025-02-13); ; ; Research in sub-Saharan Africa has shown failures in most of municipal waste composting initiatives because of bad-quality composts due to the lack of biowaste source segregation. Until now, very few biowaste source-segregation initiatives have been carried out on this part of the world. This study aimed at assessing the biowaste sorting efficiency and the attitude of households towards a pilot biowaste source-segregation system linked to a decentralized composting plant in Tiassalé. For this purpose, the impurity rate of source-segregated biowaste was monitored through the first year of implementation. Then, a cross-sectional survey was conducted to evaluate households’ attitude. The results have shown that the average impurities rate in source-segregated biowaste was very low (1%). This finding was confirmed by the results of laboratory analysis which revealed a very low heavy metals (0.2, 12.4, 7.1 and 15.5 mg kg−1 DS for Cd, Cr, Ni and Pb, respectively) contamination in the compost produced. Regarding the acceptability of the source-segregation system, the results showed that the majority (75%) of the participants accepted the source-segregation system of biowaste and almost half (47%) of them were ready to pay for such a collection service. In conclusion, this study revealed that providing households with the needed municipal solid waste management infrastructures and rising awareness about biowaste source segregation are keys for the establishment of such a collection system in Tiassalé and similar urban areas. The findings also proved the effectiveness of biowaste source-segregation system in the production of high-quality compost.Publicationtype: Journal Article20 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Combining multi-criteria decision analysis with GIS approaches for decentralized organic wastes composting plants site selection in Tiassalé, Southern Côte d’Ivoire(Sage Publications, 2022-06); ; ; ; In recent years, decentralized composting appeared as one of the most appropriate treatment options for organic waste valorization in low- and middle-income countries. In Cote d’Ivoire, a pilot project has proved the feasibility of organic municipal solid waste composting for the city of Tiassalé. However, numerous issues still need to be addressed for the establishment of a sustainable decentralized composting system in this city. One of the key issues is site selection. Until now, there is no clear model for such plant site selection. In this study, multi-criteria decision analysis (MCDA) and geographical information system (GIS) approaches were combined to develop an appropriate model for selecting decentralized composting sites in the city of Tiassalé. The methodology used involved two different and complementary phases. First, MCDA and GIS techniques were used to identify the most suitable site areas. Seven criteria clustered in three main factors (environmental, social and economic), and five constraints were considered in the analysis process. Second, five sites were selected within the most suitable areas after a basic field visit and ranked using the Analytic Hierarchy Process. The results showed that the most suitable spaces for decentralized composting plant siting represent only 2.6% of the study area. The investigation yielded on the selection of the two best options for decentralized composting plant siting for the city of Tiassalé. This study proved that the combination of MCDA and GIS is a practical and efficient method to identify suitable sites for decentralized composting plants.Publicationtype: Journal ArticleScopus© Citations 3 171 510 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Material Flows and Greenhouse Gas Emissions Reduction Potential of Decentralized Composting in Sub-Saharan Africa: A Case Study in Tiassalé, Côte d’Ivoire(Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-02); ; ; ; Despite many composting initiatives implemented in recent years throughout Sub-Saharan Africa, there is yet a lack of data on material flows and the potential contribution of decentralized composting towards greenhouse gas (GHG) mitigation. This study fills this gap assessing flows, emissions reduction and other environmental benefits of decentralized composting, based on a pilot composting facility implemented in the municipality of Tiassalé in Côte d’Ivoire. Primary data collected at the site were visualized with the STAN version 2.6 software developed at the Vienna University of Technology (Austria), for material flows, while carbon emissions reduction was estimated using the UNFCCC methods. Results show that in 2017, from the 59.4 metric tons of organic waste processed by this pilot station, 14.2 metric tons of mature compost was produced, which correspond to 24% of the input mass (on wet weight basis). On dry weight basis, mature compost represents 36% of the input mass. The nutrient content of the compost is in line with data from literature on sub-Saharan African compost, and heavy metal contamination fulfils both French and German compost standards. Concerning the GHG emissions reduction potential, the results show that with this composting scenario, 87% of the baseline emissions occurring in open dumping can be avoided.Publicationtype: Journal ArticleScopus© Citations 14 154 549