requires more electricity to circulate a larger amount of water required due to the sugar layer, compared to that in the CNC61 production. Compared to design without acid recycling, see , the overall AP dramatically decreases by more than 50% when the full acid recycling is implemented. This is because negligible sulfuric acid consumption for full-acid recycling scenario leads to negligible contribution to AP, while acid consumption for the scenario without acid recycling is the main contributor to AP.