Sustainable Waste Management Practices and Student Engagement: A Systematic Review of Institutional Recycling, Composting Initiatives, and Participatory Outcomes at the University of Port Harcourt, Nigeria

A critical systematic review investigates whether sustainable waste management initiatives can enhance stu- dent engagement in Nigerian universities, with particular reference to the University of Port Harcourt (Uni- Port). The study synthesises literature on recycling schemes, composting systems, campus waste audits, and community-based environmental stewardship programmes within higher education environments. It is the- oretically anchored in Astin’s Theory of Student Involvement, Ajzen’s Theory of Planned Behaviour, the Sustainable Development Framework, and the Community of Inquiry Model, which collectively explain how participation, attitudes, perceived control, and social learning processes shape student behavioural outcomes. Across international studies, there is generally consistent evidence that participatory environmental man- agement programmes can improve student engagement by increasing involvement in institutional activities, strengthening environmental awareness, and fostering a stronger sense of campus belonging. However, these positive associations are highly dependent on programme design features such as student inclusion in de- cision-making, curriculum integration, institutional support, and sustained resource allocation. Where such conditions are absent, engagement outcomes tend to be weak or short-lived. In contrast, the Nigerian higher education context presents significant structural and operational constraints, including inadequate waste management infrastructure, limited environmental education integration, weak institutional enforcement mechanisms, and underdeveloped student sustainability cultures. Within this setting, the evidence base is notably sparse and largely non-empirical, relying heavily on conceptual discussions and studies from dissimilar contexts. As a result, causal claims regarding the impact of sustainable waste manage- ment on student engagement in Nigerian universities remain tentative. The review therefore concludes that while sustainable waste management initiatives hold strong theoretical promise as instruments for enhancing student engagement, the current strength of evidence is moderate and primarily inferential. The findings highlight a clear need for context-specific, methodologically rigorous em- pirical studies in institutions such as UniPort to establish more definitive relationships and to inform policy and practice in Nigerian higher education sustainability governance.