Advances in application of high pressure washing to enhance market access
High pressure washing (HPW) before packing removes horticultural surface pests and other contaminants, and can improve access to international markets. The most widely used HPW system uses multiple rows of manifolds each equipped with nozzles directed downwards onto rotating brushes, typically at pressures of about 690 kPa (100 psi). In New Zealand, our need to enhance market access has led to the development of a range of innovations to the basic HPW concept. Two novel systems developed involve short treatment times (1-2 s) of singulated fruit. One involves a three-nozzle treatment system (side and top nozzles), while the other employs an overhead high-speed spinning rotor with inward pointing nozzles. Successful commercialisation of these and other technical developments has been achieved in avocado, lime and apple, with other applications being developed for capsicum, kiwifruit and various root crops including parsnip and taro. The variety of systems developed in New Zealand seeks to achieve cost-effective washers that are tailored for each fruit crop and target insect or contaminant. This has improved market access and reduced biosecurity risks.
Woolf, A., McDonald, R., Rogers, D., Olsson, S., Redpath, S., O'Donoghue, E., Cate, L., Griffin, M., Page-Weir, N., Chhagan, A., White, A., Walker, J.T.S., Jamieson, L., Kagy, V. and Mille, C. 2015. Advances in application of high pressure washing to enhance market access. Acta Hort. (ISHS) 1105:385-390
waterblasting, high pressure water washing, disinfestation, biosecurity, export