🌱 CST EnviroTech Integrated Biomass–Hydrogen Steam & Energy System for Rice Mills

CST EnviroTech’s Integrated Biomass–Hydrogen Steam & Energy System for Rice Mills is a high-efficiency renewable energy solution designed to supply steam, thermal energy, and electrical power while maximizing biomass utilization and minimizing fuel waste. In this system, biomass or MSW briquettes are converted in a gasifier into clean combustible producer gas (CO, H₂, CH₄), with ash safely separated as residue. The raw gas is cleaned in a tar separation unit to remove heavy hydrocarbons and particulates before being supplied to an IC engine–alternator for reliable on-site electricity generation.

The electricity generated supports mill operations and powers an alkaline electrolyser that produces hydrogen. This hydrogen is blended back into the engine fuel stream, enhancing combustion stability and increasing total energy extraction from the same biomass input. Oxygen generated during electrolysis can be safely vented or used for auxiliary applications.

The engine exhaust, typically around 550°C, is recovered in a Heat Recovery Boiler (HRB), where feedwater is converted into steam. This steam is distributed to key rice-processing operations such as paddy parboiling cookers and LSU/paddy dryers through steam radiators. Controlled steam heating ensures uniform moisture conditioning, improved grain quality, and efficient drying performance. After heat transfer, condensate is collected and reused, reducing water consumption and improving operational efficiency.

In addition to exhaust heat recovery, thermal energy from the engine jacket water system is also captured and utilized, further increasing overall plant efficiency. By integrating power generation, hydrogen enrichment, steam production, and process heating into a single system, rice mills can significantly reduce dependency on conventional fossil fuels and grid electricity.

The result is a sustainable, cost-effective, and energy-resilient solution that enhances productivity, lowers fuel costs, and supports environmentally responsible rice processing operations.