Processing for juice and pulp production is mechaised. In Hawaii, fruit from the field are dumped into a wash tank with agitation. Conveyors lift the fruits past wash sprays-whence they are sorted by hand to remove damaged or otherwise unfit fruit. Skin are cut with rotating knives spaced 1.6 cm apart and the sliced pieces fed into a continuous basket centrifuge. Juice, pulp and seeds pass through the centrifuge screen while rinds pass to waste. Screened pulpers and finishers separate the seeds and fibres from the juice and pulp. In Australia, the juice may be extracted using rollers ; in New Zealand pulp and seeds are removed from halved fruit using suction (Chan, 1980). Extraction yields have been increased by 35% by using pectinolytic enzymes (Lipitoa & Robertson , 1977).