Spent charge, also known as sandalwood residue, is the exhausted biomass created during the oil distillation process when obtaining sandalwood oil. This residue has traditionally been known as an industrial by-product that was simply discarded as green waste or boiler feed after the steam distillation process.
Instead of disposing of the exhausted biomass, ongoing research and innovation by Quintis has unlocked the potential for grouping this as spent charge. By re-purposing it to create incense products, Quintis has been able to reduce waste and, more than that, continued to add value to sandalwood operations.
— Read more in Turning Indian sandalwood waste to incense: Upcycling a precious ingredient at Cosmetics Business.