During the Freiberg Leather Days conference on May 21, a presentation from Tanzania discussed a project aimed at scaling up production of tannin agents from waste cashew husks.
Cecilia Rolence China, from the Nelson Mandela African Institute of Science based in Tanzania, presented a paper around scaling up production of tanning agents from cashew husks to produce sustainable leather tannins in Tanzania.
Cashews are one of Tanzania’s largest export products and each year several tons of waste husk are generated estimated to be around 4.13 tons. Studies show that the waste husk can be readily converted into a vegetable tannin and it has the potential to support a large-scale tannin production.
She showed that lab scale studies could now be readily scaled up to an industrial scale to support the local tanning industry, especially local tanners.
China said that the husks could be collection at regional centres in Mtwara, Lindi and Ruvuma and then transferred to a central processing facility where the tannin agent is produced. She added that the institute is now looking for project partners from the leather industry to help scale up the process from a lab scale to a fully fledged industrial process.
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