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Nutrient dynamics of turf grass irrigated with laundry and bathtub greywater

Radin Mohamed, Radin Maya Saphira and Anda, Martin and Mohd Kassim, Amir Hashim Nutrient dynamics of turf grass irrigated with laundry and bathtub greywater. In: The International Conference on Civil and Environmental Engineering Sustainability (IConCEES 2011), 3-5 April 2012, Johor Bahru, Malaysia.

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Abstract

Greywater reuse is increasing as a measure to mitigate declining potable water supplies in residential areas. In Perth, Western Australia, garden irrigation with greywater has grown popular for householders to keep their plants sustained, especially during long hot summers. However, the sandy soils of the Swan Coastal Plain allow for the rapid transport of contaminants through the soil profile, potentially affecting the underlying shallow aquifer. Hence, this study was conducted to determine the nutrient leaching from the couch grass (Cynodon dactylon L.) sod, on a free-draining sandy soil, irrigated with laundry and bathtub greywater. The experiment was used a modified aquarium tank and the irrigation was sourced from the family house following: (i) irrigating with 100% potable water as a control (TW) (ii) irrigating with untreated full cycle laundry water (LGW) (iii) irrigating with untreated bathtub water (BGW) for 24 weeks, starting from October 2009 to March 2010. Nutrient leaching was assessed by measuring the leachate volumes and concentrations of nutrient concentration leached from the funnelled leachate to a central exit point from which leachate was collected into a 1L plastic container. The results showed that the high rates of salt; Na, Cl; macronutrient P, K, Ca and micronutrients; Al and B leaching beyond the 30cm root-zone depth. Consequently, the turf grass requires the addition of the losses nutrients in the turf grass fertilization programme to supplement growth.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: laundry; bathtub; greywater; irrigation; nutrient; turf grass; tank
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes
Depositing User: Normajihan Abd. Rahman
Date Deposited: 06 Nov 2012 06:11
Last Modified: 06 Nov 2012 06:11
URI: http://eprints.uthm.edu.my/id/eprint/2540
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