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Design of a modified low cost treatment system for the recycling and reuse of laundry waste water

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  • Ahmad, Jamil
  • EL-Dessouky, Hisham

Abstract

A low cost system was designed for the recycling and reuse of waste water from a laundry unit. The unit was associated with a petroleum refinery in Pakistan. A survey was made to check the quantity and quality of waste water generated. The unit was discharging 1.90m3/day of waste water into the natural water course. A small size sand and gravel filter was made from 0.00125m sand, 0.0125 and 0.025m gravels. The sand and two sizes of gravels were arranged in three layers. Each layer was 0.10m deep. The three layers were placed in a stainless steel hopper and waste water was passed through the filter. Both, the waste water and treated water were analyzed and compared with tap water. The physical and chemical parameters considered were pH, turbidity, total suspended solids (TSS), total dissolved solids (TDS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), total hardness (TH) and iron contents. The results showed that the filtration process reduced the pH, turbidity, TH and TSS to acceptable limit and TDS to some extent. On the other hand it had negligible effect on COD and BOD. The treated water was ranked as low-grade water and was found to be suitable for use in the laundry unit for the first rinse only. Based on the obtained results large-scale treatment process was designed for the waste water. It was a low cost treatment system consisting of sedimentation and filtration. It was found that the total capital and operating cost per year of the system was US$ 1343. The daily saving of water was 1.80m3 with a payback period of only 1 year in one case and half year in the second case. In the first case the price of fresh water was taken as US$ 2.2/m3 and in the second case as US$ 4.4/m3.

Suggested Citation

  • Ahmad, Jamil & EL-Dessouky, Hisham, 2008. "Design of a modified low cost treatment system for the recycling and reuse of laundry waste water," Resources, Conservation & Recycling, Elsevier, vol. 52(7), pages 973-978.
    • Handle: RePEc:eee:recore:v:52:y:2008:i:7:p:973-978
    DOI: 10.1016/j.resconrec.2008.03.001
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    References listed on IDEAS

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    1. Annegrete Bruvoll & Karine Nyborg, 2002. "On the value of households' recycling efforts," Discussion Papers 316, Statistics Norway, Research Department.
    2. Meliß, M. & Neskakis, A. & Plettner-Marliani, J. & Lange, C. & Hövelmann, A. & Schumacher, J., 1998. "Waste water recycling supplied by renewable energies - basic conditions and possible treatment technologies," Renewable Energy, Elsevier, vol. 14(1), pages 325-331.
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    Cited by:

    1. Guilbaud, Julie & Massé, Anthony & Andrès, Yves & Combe, François & Jaouen, Pascal, 2010. "Laundry water recycling in ship by direct nanofiltration with tubular membranes," Resources, Conservation & Recycling, Elsevier, vol. 55(2), pages 148-154.
    2. Matthias Maldet & Daniel Schwabeneder & Georg Lettner & Christoph Loschan & Carlo Corinaldesi & Hans Auer, 2022. "Beyond Traditional Energy Sector Coupling: Conserving and Efficient Use of Local Resources," Sustainability, MDPI, vol. 14(12), pages 1-36, June.
    3. Guilbaud, Julie & Massé, Anthony & Andrès, Yves & Combe, François & Jaouen, Pascal, 2012. "Influence of operating conditions on direct nanofiltration of greywaters: Application to laundry water recycling aboard ships," Resources, Conservation & Recycling, Elsevier, vol. 62(C), pages 64-70.
    4. Devi Buehler & Nadine Antenen & Matthias Frei & Christoph Koller & Diederik P. L. Rousseau & Andreas Schoenborn & Ranka Junge, 2021. "Towards Water and Energy Self-Sufficiency: a Closed-Loop, Solar-Driven, Low-Tech Laundry Pilot Facility (LaundReCycle) for the Reuse of Laundry Wastewater," Circular Economy and Sustainability,, Springer.
    5. Nicolaidis, Charalambos & Vyrides, Ioannis, 2014. "Closing the water cycle for industrial laundries: An operational performance and techno-economic evaluation of a full-scale membrane bioreactor system," Resources, Conservation & Recycling, Elsevier, vol. 92(C), pages 128-135.

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