Vietnam: Industry leaders have argued that co-processing of non-recyclable plastic waste in cement kilns could be a scalable solution to advance Vietnam’s sustainability and circular economy goals. At a workshop held in Hanoi on 2 October 2025, the Norwegian Foundation for Scientific and Industrial Research (SINTEF) and the Royal Norwegian Embassy, in partnership with the Vietnam National Cement Association (VNCA), concluded the OPTOCE Project (‘Ocean Plastic Turned into an Opportunity in Circular Economy’), funded by the Norwegian government.
Norwegian Ambassador to Vietnam Hilde Solbakken said “Combating marine plastics and climate change is a top priority for Norway – both globally and in Vietnam. Through OPTOCE, we’ve seen how science-based solutions like co-processing can transform plastic waste into a resource that benefits the climate, the economy and communities.”
OPTOCE was originally launched as a regional initiative in five countries, including Vietnam, and later expanded to eight countries across Asia. The workshop featured several presentations and a panel discussion focusing on the legal framework, potential waste supplies, and the practices and challenges in implementing co-processing in Vietnam.
Dr Kåre Helge Karstensen, chief scientist and programme manager of OPTOCE, added that the initiative has proven co-processing to be both technically feasible and environmentally sound. “The next step is to move beyond pilots and integrate this solution into national policy frameworks to drive systemic change,” he said.
Dr Lương Đức Long, VNCA vice president, said Vietnam’s cement industry is already applying co-processing successfully. “Co-processing waste in cement kilns is a safe and effective solution. We hope the government introduces specific policies and incentives that support enterprises and technology transfer. If we join forces, co-processing will turn wastes into ‘black gold’ and cement factories into ideal co-processing hubs,” he said.
Vietnam’s cement plants, including INSEE’s Hon Chong facility in Kien Giang and Lam Thach Green Cement (QNC)’s plant in the north, have piloted this approach since 2021, achieving thermal substitution rates of 35–40%.
