Peeling back the layers - Uncovering the potential of potato peels

Abstract

This thesis investigates the potential for enhancing the uptake of high-nutritional-value substances from potato peels to improve resource efficiency in the Dutch potato processing industry. It explores the multifaceted aspects of potato peel valorisation by analysing current utilization practices, technological advancements, and stakeholder influences within a framework that supports sustainable agricultural practices.

The study begins by contextualizing the significance of potato peels as a byproduct in the Netherlands, outlining the economic and environmental incentives for valorising this underutilized resource. The main research question explores how the recovery and utilization of valuable substances from potato peels can be increased.

A comprehensive review of existing literature establishes a theoretical foundation, identifying the nutritional potentials of potato peels, their current applications, and the technological barriers to their valorisation. Semi-structured interviews with relevant stakeholders from the industry provide the research with real-world examples and insights.

Results reveal that while potato peels are primarily used for biogas production and animal feed, there are significant opportunities for higher-value applications. Technological innovations in extraction and processing methods are critical to overcoming current limitations. The Stakeholder analysis underscores the need for collaborative approaches involving government incentives, research advancements, and industry participation to foster a favourable environment for innovation.

The discussion integrates these findings, highlighting the synergy between technological feasibility, economic viability, and regulatory support in optimizing the valorisation process. It also addresses the challenges and opportunities identified through stakeholder insights, suggesting strategic directions for policy and practice. It is however recommended that further research in the economic feasibility of such valorisation processes is needed in order to scale up to full commercialization.

The thesis concludes that increasing the uptake of high-nutritional-value substances from potato peels is not only technically feasible but also environmentally beneficial. It advocates for a shift in perception from viewing potato peels as waste to recognizing them as valuable resources, calling for systemic change towards sustainability in the agrifood sector. This thesis encourages continued exploration, innovation, and collaboration to fully realize the benefits of byproduct valorisation in the Netherlands and beyond.