Integrating Project-Based and Community Learning for Cross-Disciplinary Competency Development in Nutrient Recovery

Diana Guaya (), Juan Carlos Romero-Benavides, Natasha Fierro and Leticia Jiménez
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Diana Guaya: Departamento de Química, Universidad Técnica Particular de Loja, Loja 110107, Ecuador
Juan Carlos Romero-Benavides: Departamento de Química, Universidad Técnica Particular de Loja, Loja 110107, Ecuador
Natasha Fierro: Departamento de Ciencias Biológicas y Agropecuarias, Universidad Técnica Particular de Loja, Loja 110107, Ecuador
Leticia Jiménez: Departamento de Ciencias Biológicas y Agropecuarias, Universidad Técnica Particular de Loja, Loja 110107, Ecuador

Sustainability, 2025, vol. 17, issue 19, 1-34

Abstract: This study presents a vertically integrated Project-Based Learning (PBL) and Community-Based Learning (CBL) framework that connects postgraduate and undergraduate programs in Applied Chemistry and Agricultural Engineering. Postgraduate students synthesized zeolite-based materials for nutrient recovery, which were subsequently applied by undergraduate students in field trials conducted in collaboration with rural farming communities. The project was evaluated using rubrics, surveys, focus groups, and reflective journals. Results demonstrated substantial development of technical, communication, and critical thinking skills, with students highlighting the value of linking theory to practice. Community feedback confirmed the perceived benefits of the material for soil improvement and fertilizer efficiency, while also underscoring the need for sustained engagement. Despite challenges such as curricular coordination and resource constraints, the model effectively fostered interdisciplinary learning and social impact. These findings highlight the contribution of this sequentially instructional design to STEM education by connecting research, teaching, and outreach within a constructivist, sustainability-oriented approach.

Keywords: project-based learning; community-based learning; interdisciplinary education; higher education (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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