The PoC trial follows a feasibility study conducted by Rhinoflux and Swing Corporation, which indicated the potential applicability and business viability of HCL technology for sewage sludge. The demonstration began in July 2026 and represents the next phase toward practical deployment in sewage treatment infrastructure.
Japan¡¯s Sewage Sludge Challenge
Japan¡¯s sewage treatment facilities face a growing challenge: how to reduce, recycle, and ultimately dispose of the sludge generated through treatment processes in a more sustainable way. The country is estimated to produce approximately 2.34 million dry solids tons of sewage sludge each year.
As municipalities and water utilities seek to build more sustainable water infrastructure, technologies that can reduce sludge treatment costs and environmental impacts while recovering energy and cutting greenhouse gas emissions are increasingly needed.
Today, sewage sludge in Japan is mainly managed through landfilling, incineration, conversion into solid fuel, biogas utilization via anaerobic digestion, and use in construction materials such as cement.
While these methods play an important role in existing sludge management, they also face challenges, including environmental impacts and high treatment costs. Power generation from solid fuels or methane gas also relies on combustion, leaving room for more efficient and lower-emission alternatives.
¡°Sewage sludge should no longer be seen as waste, but as a domestic energy and carbon resource. Hydro Chemical Looping can help unlock that value without combustion¡± said Alex Mazawa, CEO of Rhinoflux Inc.
A Non-Combustion Approach to Biomass Power Generation
The technology has the potential to deliver approximately two to four times higher power generation efficiency than conventional biomass power generation systems, allowing more electricity to be produced from the same amount of biomass. Its aqueous reaction process also makes it well suited to high-moisture biomass, including sewage sludge, which has historically been difficult to utilize economically.
Demonstrating the Technology with Swing
The trial will combine Swing¡¯s water and sludge treatment expertise with Rhinoflux¡¯s HCL technology. The two companies will collect practical data for future deployment and assess the requirements for sewage sludge resource utilization in sewage treatment facilities.
Creating Value for the Sewage Treatment Sector
The technology is expected to deliver value in three areas: First, it may help reduce the burden of sludge treatment. By reducing the volume of sewage sludge, the technology could lower the burden of treatment, transportation, and final disposal.
Second, it could expand on-site energy generation options. Sewage sludge is a continuously available local biomass resource. Converting it into electricity more efficiently could help sewage treatment facilities improve energy resilience and reduce operating costs.
Alex Mazawa, CEO of Rhinoflux Inc. said : ¡°Sewage treatment facilities generate sewage sludge every day across Japan. We believe this underutilized resource should be redefined not as waste, but as a domestic energy and carbon resource.¡±
Swing Corporation is a leading Japanese water treatment company providing engineering, construction, operation and maintenance services for water and sewage treatment facilities, industrial wastewater treatment plants, and other environmental infrastructure.
The company supports sustainable water infrastructure through its engineering capabilities and operational expertise across the water treatment lifecycle. Website: https://www.swing-w.com/eng