When most people think about biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More, they associate it with soil improvement or carbon sequestration. While these remain important applications, I believe the future of biochar extends far beyond them. At the Department of Chemical Engineering, BITS Pilani, K K Birla Goa Campus, my research group is working to establish biochar as a high-performance functional material to address some of today’s most pressing challenges in renewable energy, the circular economy, and decarbonization.

Our laboratory focuses on converting agricultural residues into high-performance biochar through our patented biochar production technology. Our research group works at the interface of biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More valorization, engineered biochar, waste-to-energy technologies, renewable fuels, and circular economy solutions. Our objective is to translate fundamental research into scalable technologies that address real-world sustainability challenges.

One of the most exciting directions we are currently exploring is the application of engineered biochar in anaerobic digestion and biomethanation. While biochar has traditionally been valued for carbon sequestration and soil health, its unique physicochemical properties also make it an effective performance-enhancing material for biological conversion processes. Its highly porous structure provides an excellent habitat for microbial colonization, while its conductive carbon matrix facilitates direct interspecies electron transfer (DIET), improving microbial activity, buffering process fluctuations, and enhancing overall reactor stability.

To evaluate this potential, our team investigated the use of rice-stalk biochar as a functional additive during the anaerobic digestion of rice stalk. The performance of the engineered biochar was independently evaluated through a Biochemical Methane Potential (BMP) study conducted in partnership with REVY Environmental Solutions Pvt. Ltd. The results were encouraging. Biochar supplementation increased cumulative biogas production by approximately 35–36%, improved methane concentration to 55–60% and maintained stable digestion conditions throughout the experimental period. These findings reinforce the concept that engineered biochar can serve as an effective process-intensification material for biomethanation rather than merely as a carbon-rich by-product.

This work represents one component of our broader research area. I am fortunate to work with a highly motivated interdisciplinary team committed to developing sustainable technologies with real-world impact. Dr. Sivasankar Kakku (now a Postdoctoral Fellow at Thammasat University, Thailand) is leading efforts in technology scale-up and process engineering, translating laboratory-scale innovations toward pilot-scale implementation and industrial deployment. Dr. Sowkhya Naidu (now a Postdoctoral Fellow at BPCL R&D India) is leading research on developing sustainable refinery feedstocks from biomass and waste resources, with a focus on refinery co-processing, petrochemical production, and technology scale-up for industrial implementation. Dr. Yashasvi Trivedi (now a Postdoctoral Fellow at BPCL R&D India) is advancing research on engineered biochar for CO₂ capture and refinery integration, developing carbon-based materials to support industrial decarbonization and carbon management strategies. Ms. Arunita Pal, our doctoral researcher, is focusing on downstream process development to maximize product quality and process integration. Together, we are building an interdisciplinary research ecosystem that bridges fundamental science, engineering innovation, and industrial translation to develop sustainable technologies with tangible environmental and societal impact.

At the Department of Chemical Engineering, BITS Pilani, K K Birla Goa Campus, we strive to create a collaborative research environment where students, researchers, and faculty work together to address challenges in sustainable energy, biomass valorization, advanced carbon materials, and industrial decarbonization. Our goal is to foster research that combines scientific rigor with practical relevance, enabling innovative ideas to evolve into technologies with real-world impact.

The biomethanation study presented here illustrates an important shift in the way biochar should be viewed. Beyond its conventional role in carbon sequestration, engineered biochar has the potential to become a key enabling material for renewable natural gas production, environmental remediation, catalysis, wastewater treatment, and other sustainable industrial processes. Biomethanation is only one example of the many high-value applications that engineered biochar can unlock.

As researchers, our responsibility extends beyond developing new materials; we must also demonstrate how these materials can contribute to solving global sustainability challenges. Agricultural residues should no longer be regarded as waste streams requiring disposal. Instead, they should be recognized as valuable renewable carbon resources that can be transformed into advanced functional materials for clean energy production and circular resource utilization. I believe engineered biochar will play an increasingly important role in this transition, and our research group remains committed to advancing the science and engineering needed to realize that vision.