Fig. 5

General steps for cyanogenic compounds removal in wild yam tuber chips preparation. The process consists of peeling the wild yam tuber; slicing by traditional wooden slicer; rubbing the sliced tuber by salt and/or ash; drying the rubbed sliced tuber; putting into sack and then manually pressing, or putting into bamboo basket and pressing by stones for a night; washing the pressed sliced tuber; soaking in the tub or soaking in the river; draining the soaked sliced tuber; steaming or boiling; and sun drying