Boosting the integrated use of sawmill wastes: Tannin-based extractives opportunities

In the lignocellulosic biorefinery concept, by-products from sawmills have been redefined and considered as raw materials to produce high-value products. Wood extractives are not an exception despite being found in smaller proportions. The extractive-based components can offer competitive advantages over traditional market products and promote a circular economy. Tannins demonstrate applicability in adhesives, fertilizers, antioxidant food packaging, and water treatment. However, there are still challenges on an industrial scale.