Multi-criteria analysis towards the new end use of recycled water for household laundry: a case study in Sydney.

This paper aims to put forward several management alternatives regarding the application of recycled water for household laundry in Sydney. Based on different recycled water treatment techniques such as microfiltration (MF), granular activated carbon (GAC) or reverse osmosis (RO), and types of washing machines (WMs), five alternatives were proposed as follows: (1) do nothing scenario; (2) MF+existing WMs; (3) MF+new WMs; (4) MF-GAC+existing WMs; and (5) MF-RO+existing WMs. Accordingly, a comprehensive quantitative assessment on the trade-off among a variety of issues (e.g., engineering feasibility, initial cost, energy consumption, supply flexibility and water savings) was performed over the alternatives. This was achieved by a computer-based multi-criteria analysis (MCA) using the rank order weight generation together with preference ranking organization method for enrichment evaluation (PROMETHEE) outranking techniques. Particularly, the generated 10,000 combinations of weights via Monte Carlo simulation were able to significantly reduce the man-made errors of single fixed set of weights because of its objectivity and high efficiency. To illustrate the methodology, a case study on Rouse Hill Development Area (RHDA), Sydney, Australia was carried out afterwards. The study was concluded by highlighting the feasibility of using highly treated recycled water for existing and new washing machines. This could provide a powerful guidance for sustainable water reuse management in the long term. However, more detailed field trials and investigations are still needed to effectively understand, predict and manage the impact of selected recycled water for new end use alternatives.

[1]  Omar Abdelaziz,et al.  Advances in household appliances- A review , 2011 .

[2]  Charles H. Hacker,et al.  Residential potable and recycled water end uses in a dual reticulated supply system , 2011 .

[3]  Bandita Mainali,et al.  Feasibility assessment of recycled water use for washing machines in Australia through SWOT analysis , 2011 .

[4]  Sara Dolnicar,et al.  Marketing Recycled Water: Review of Past Studies and Research Agenda , 2005 .

[5]  Bandita Mainali,et al.  Responses of community to the possible use of recycled water for washing machines: A case study in Sydney, Australia , 2011 .

[6]  John C. Butler,et al.  Simulation techniques for the sensitivity analysis of multi-criteria decision models , 1997 .

[7]  M. Sinclair,et al.  Transfer Rates of Enteric Microorganisms in Recycled Water during Machine Clothes Washing , 2009, Applied and Environmental Microbiology.

[8]  Steve Siverns,et al.  Comparison of Membrane-based Solutions for Water Reclamation and Desalination , 2005 .

[9]  Huu Hao Ngo,et al.  A critical review on sustainability assessment of recycled water schemes. , 2012, The Science of the total environment.

[10]  Andrew J. Higgins,et al.  A comparison of multiple criteria analysis techniques for water resource management , 2008, Eur. J. Oper. Res..

[11]  Sara Dolnicar,et al.  Australians’ Water Conservation Behaviours and Attitudes , 2010 .

[12]  Jong-Woo Nam,et al.  A hybrid microfiltration―granular activated carbon system for water purification and wastewater reclamation/reuse , 2009 .

[13]  Huu Hao Ngo,et al.  Analysis of Sydney’s recycled water schemes , 2013, Frontiers of Environmental Science & Engineering.

[14]  Igor Linkov,et al.  Prioritization of sediment management alternatives using stochastic multicriteria acceptability analysis. , 2010, The Science of the total environment.

[15]  Rodney Anthony Stewart,et al.  End use water consumption in households: impact of socio-demographic factors and efficient devices , 2013 .

[16]  F. Winquist,et al.  Determination of detergents in washing machine wastewater with a voltammetric electronic tongue. , 2008, Talanta.

[17]  S. Gato-Trinidad,et al.  Understanding urban residential end uses of water. , 2011, Water science and technology : a journal of the International Association on Water Pollution Research.

[18]  Huu Hao Ngo,et al.  Resident's strategy survey on a new end use of recycled water in Australia , 2009 .