Waste management challenges in N’Djamena and Conakry

In N’Djamena, Chad, slaughterhouse waste including blood, excrement, and organic remains poses significant hygiene and environmental risks. If left untreated, these materials can contaminate groundwater and release methane, a potent greenhouse gas. Potential solutions involve biogas production through anaerobic fermentation in digesters, which can provide fuel for cooking or electricity. Additionally, the resulting digestate can serve as agricultural fertilizer, while sterilized blood can be processed into protein-rich meal for livestock and aquaculture.

In Conakry, Guinea, a severe waste crisis has emerged following the closure of the Dar-es-Salam landfill. The closure was prompted by a landslide caused by heavy rains on August 22-23, which destroyed nearby housing and resulted in 36 deaths. Since then, refuse has accumulated along major roads and in residential neighborhoods, creating health risks such as cholera. Residents report a breakdown in collection services, with some areas waiting weeks for garbage trucks, leading to illegal dumping and the burning of waste.