DOI: 10.11648/j.ajep.20261503.12 ISSN: 2328-5699

Investigation on Plastic Wastes in Nyamasheke District, Rwanda: Quantification, Characterization and Management Framework Design

Ntabugi Assoumpta, Pancras Ndokoye, Erasmus Atusasire
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Plastic waste accumulation in rural markets of developing countries constitutes a critical yet systematically understudied dimension of the global plastic pollution crisis. This study provides the first empirical quantification, characterization, and management assessment of plastic waste in three rural market sectors Kagano, Kanjongo, and Macuba in Nyamasheke District, Rwanda's Western Province. Employing a convergent mixed-methods design combining physical waste audits over 21 sessions, structured questionnaires administered to 400 respondents, key informant interviews, and focus group discussions, the study generated comprehensive market-level evidence on plastic waste generation rates, composition, disposal practices, environmental impacts, and governance gaps. Physical waste audits recorded a combined total of 20.5 kilograms and 7,625 plastic items across the 21-day audit period. Kagano sector generated the highest daily average at 1.66 kg/day, followed by Kanjongo at 0.89 kg/day and Macuba at 0.39 kg/day. Survey data revealed a mean self-reported generation of 3.01 plastic items per respondent per day, with vendors generating significantly more than consumers (t = 2.415, p = 0.016). PET bottles dominated the waste stream at 60.0% by weight, followed by wrappers and sachets at 34.6%. Plastic bags were completely absent from all audit sessions, confirming the sustained effectiveness of Rwanda's landmark 2008 single-use plastic ban. Burning (46.0%) and open dumping (33.5%) accounted for 79.5% of all disposal behavior, with waste segregation virtually absent among 98.5% of respondents. All five environmental impact indicators market littering, drainage blockage, soil and water contamination, air pollution, and livestock risk were observed in 100% of audit sessions. Chi-square analysis revealed highly significant sectoral variation in disposal practices (χ² = 55.333, p < 0.001). A critical awareness-behavior gap was documented: 99.2% of respondents were aware of the plastic ban, yet harmful disposal practices persisted across the study area. Based on these findings, the study proposes a multi-tiered, context-specific plastic waste management framework integrating Extended Producer Responsibility mechanisms, community-based collection infrastructure, sectoral enforcement, and behavioral change interventions. The findings provide actionable evidence to inform Rwanda's transition to a circular economy and offer a replicable methodology for rural market waste assessment across Sub-Saharan Africa.

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