Indonesia has over fifteen million hectares of peatland, making it one of the world's largest carbon stores. However, over decades, drainage for oil palm and acacia plantations has transformed these ecosystems into major sources of emissions. Peat fires generate transboundary haze, impact the health of millions of people, and cause significant economic losses. Amid these challenges, an approach has emerged that combines ecosystem restoration with green economy innovation: sago paludiculture and the development of bioplastics.
Sago (Metroxylon sagu) is a plant that grows naturally in flooded peatlands. It requires no drainage, sequesters carbon, and produces high amounts of starch. From an agronomic perspective, sago offers yields of up to twenty-five tons of starch per hectare per year, four times higher than rice or corn. When planted on rewetting peatlands, sago not only restores hydrological function but also creates a new source of income for local communities.
The superiority of sago as a bioplastic material has been scientifically tested. Wageningen University and Research conducted a second phase of research that demonstrated that sago starch has unique gelatinization and film-forming properties, making it highly suitable for thermoplastic starch (TPS) films. This research also produced a prototype sago-based bioplastic film with a production cost of around €2.5 per kilogram, competitive with cassava-based films. The trial results showed that sago can meet European biodegradation standards (TÜV), opening up export opportunities to premium markets. This fact proves that the sago-bioplastic value chain is not just a concept but has passed international scientific verification.
Sago–Bioplastic Value Chain Infographic: process tested at Wageningen University & Research
After harvesting, sago stalks are processed into starch through both traditional and industrial processes. In some locations, sago bundles are wrapped in leaves and fermented naturally, while in modern facilities, stainless steel machines process the starch with high efficiency. This process provides a bridge between local knowledge and modern technology.
Sago starch then becomes the base material for biodegradable bioplastics, replacing petrochemical plastics that pollute oceans and rivers. Sago-based bioplastic products such as shopping bags, cups, straws, and cutlery are concrete evidence that innovation can be rooted in tropical ecosystems. Through a digital MRV system and carbon certification, every hectare of rewetting land and every ton of bioplastic produced can be calculated for its contribution to emissions reductions. The resulting carbon credits provide additional economic value to the social forestry cooperatives that manage the land.
This value chain goes beyond the technical aspects. At the social level, the program strengthens Social Forestry, provides tenure security for communities, and creates new job opportunities. Women are actively involved in the processing and governance of the cooperatives, while young people discover career prospects in the sustainable bioplastic industry. Income from starch, bioplastic, and carbon credits creates a resilient and inclusive economic ecosystem.
The environmental impact is also tangible. Peat rewetting avoids over twenty tons of CO₂e per hectare per year, reduces the risk of fire, and restores natural habitat for swamp species. At the marine level, sago bioplastic helps reduce the leakage of petrochemical plastics that pollute coastal ecosystems. Thus, the sago-bioplastic value chain not only connects farmers and industry but also binds local and global interests under one vision: a green economy based on ecosystem restoration.
Through this approach, Indonesia demonstrates that climate solutions can stem from its own cultural and ecological roots. From restored peat to replaced plastic, from empowered communities to credible carbon markets, all are connected in a clean and integrated flow.
As Johan Kieft writes, this initiative is not simply an environmental project, but a model for economic transformation that places communities as the primary agents of change. Sago symbolizes the balance between nature and humanity, between tradition and technology, between economics and ecology.
Author:
Johan Kieft
Regional technical specialist
UNEP
Disclaimer: This article represents the author's personal views and opinions and does not necessarily reflect the views, policies, or official positions of GREEN for Riau and its implementing partners.