NY320 - Development of Recycled Water Systems for Australian Nurseries

The review of the literature shows that most of the important issues relating to recycling water in nurseries both overseas and in Australia are poorly studied. In particular, there is little published data on treatment of run-off water prior to recycling to optimize fertilizer programs, to minimize salinity, and to minimize the risk of disease transmission via irrigation water. Chlorination is currently the main method of water disinfection both in Australia and overseas. Ultraviolet irradiation, bromination, ozonation, microfiltration and chlorine dioxide are lesser used methods. Information is not available on the dosages of these treatments required to control water borne plant pathogens. An important feature shown in this present study is that it is vital that nurseries and flower farms do a complete analysis of water quality before choosing a water disinfestation strategy.