Household Greywater Reuse for Garden Irrigation in Perth (2004)

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This dissertation focuses on a local system in Perth and uses a combination of experimentation and modelling to determine whether the nutrients supplied by greywater irrigation alone are sufficient to sustain the growth of a family lawn, and whether these nutrients are available for uptake by the turf. A mass balance was carried out to determine the amount of nutrients flowing into and out of the lawn. The results showed that the nutrients supplied by the greywater are beneficial to the irrigated lawn but are not sufficient to sustain its growth. Consequently, the lawn requires the addition of fertiliser to supplement growth.The dissertation examines why greywater reuse for garden irrigation is not a widespread practice in Perth. Six possible barriers were identified, the most influential of these being the cost of installing and maintaining a greywater reuse system.