Microbial photobioreactors are specialized systems designed to harness the metabolic capabilities of microorganisms, such as algae and bacteria, under controlled light conditions. These bioreactors are pivotal in the field of biotechnology for producing biofuels, bioplastics, and other valuable biochemicals. The concept revolves around utilizing light as an energy source to drive photosynthetic and other light-dependent microbial processes. This technology is particularly significant in addressing global challenges such as renewable energy production and environmental sustainability. By converting sunlight into chemical energy, microbial photobioreactors offer a green alternative to traditional chemical processes, reducing reliance on fossil fuels and minimizing carbon footprints. The integration of genetic engineering and advanced materials science has further enhanced the efficiency and scalability of these systems. At SU, researchers are continually innovating to improve the performance and economic viability of photobioreactors, making them a promising solution for sustainable industrial applications.

Under the guidance of Prof Robbie Pott, the research on microbial photobioreactors is advancing rapidly at SU's Chemical Engineering Department. The team is focused on developing novel biotechnology that enhances the efficiency of microbial processes for sustainable bioproducts. Current activities include the design and optimization of photobioreactors, such as continuously stirred reactors as well as tubular photobioreactors for biological hydrogen production. Additionally, they are exploring the immobilization and application of R. palustris, a purple non-sulphur bacterium capable of biological hydrogen production through photofermentation. Current investigations into exploiting natural sunlight as a source of illumination are underway, with the goal of decreasing operational costs of biological hydrogen production by eliminating the need for energy-intensive artificial illumination. Techno-economic analyses are also conducted to assess the current economic viability of state-of-the-art biological hydrogen production through photofermentation. These studies highlight where further research and field advancements are required to improve upon the industrial economic viability of this process. This multi-disciplinary approach combines chemical engineering, molecular biology, and applied microbiology to push the boundaries of bioprocess engineering and contribute to more sustainable industrial practices.