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Environment Institute member����(Adelaide Microscopy) and Associate Professor Stephen Bell (School of Physics, Chemistry and Earth Sciences),��have��developed a new method to repurpose lignin waste.

Lignin is a complex organic polymer that is found within the cell walls of plants, particularly in wood and bark. Its glue-like behaviour holds plants together, giving them strength, resistance against decay and making wood hard and sturdy. About 98% of lignin is discarded as a by-product from forestry and agriculture. Lignin contains highly valuable molecules that can be used for fragrances, flavourings fuels and therapeutics.��

Dr Whelan and Professor Bell’s new research published��in Nature Communications, focuses on��using an enzyme from the soil bacterium��Amycolatopsis��thermoflava��to break down complex lignin molecules using hydrogen peroxide.

This enzyme-driven approach is more sustainable and environmentally friendly compared to traditional methods that rely on high temperatures, strong acids, and toxic solvents.

Dr Whelan explained��“This new catalytic processing method will support development of other new green chemistry ‘enzyme factories’ or biorefineries to turn the lignin and other biological waste streams into a valuable repository of fine chemicals.”

Dr Whelan highlighted that the current chemical synthesis methods are petroleum-based and toxic, this approach aligns with sustainable green chemistry. The aim��of��this research is to��retrofit this hydrogen peroxide-driven activity into other enzymes to expand its application in the fragrance, flavour, and medicinal industries.��Further noted by Associate Professor Bell,��the innovation addresses the need to replace expensive, energy-intensive processes with environmentally friendly alternatives.��

This breakthrough could lead to multiple ways to utilise and reduce the waste of lignin while creating high-value renewable products.��

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