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Car wash wastewater reclamation. Full-scale application and upcoming features

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  • Zaneti, Rafael
  • Etchepare, Ramiro
  • Rubio, Jorge

Abstract

Recent features on car wash wastewater reclamation and results obtained in a full-scale car wash wastewater treatment and recycling are reported. The technique employed comprises a new flocculation-column flotation (FCF), sand filtration and final chlorination. Water usage and savings audits (20 weeks) showed that almost 70% reclamation was possible, and less than 40L of fresh water per wash was attained. Wastewater and reclaimed water were fully characterized by monitoring chemical, physicochemical and biological parameters. Results were discussed in terms of reclamation aesthetic quality (water clarification and odour), health (pathological) and chemical (corrosion and scaling) risks. Noteworthy, this work showed a high count of fecal and total coliforms both in the wastewater and in the treated water, making the need of a final disinfection mandatory. The cost-benefit analysis shows that, for a car wash wastewater reclamation system in Brazil, at least 8 months were needed for the FCF-SC equipment amortization, when considering a demand over 30 washes per day. It is believed that the discussions on car wash wastewater reclamation criteria may assist alerting wash cars units and institutions to create laws in Brazil and elsewhere.

Suggested Citation

  • Zaneti, Rafael & Etchepare, Ramiro & Rubio, Jorge, 2011. "Car wash wastewater reclamation. Full-scale application and upcoming features," Resources, Conservation & Recycling, Elsevier, vol. 55(11), pages 953-959.
    • Handle: RePEc:eee:recore:v:55:y:2011:i:11:p:953-959
    DOI: 10.1016/j.resconrec.2011.05.002
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    References listed on IDEAS

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    1. Ghisi, Enedir & Tavares, Davi da Fonseca & Rocha, Vinicius Luis, 2009. "Rainwater harvesting in petrol stations in Brasília: Potential for potable water savings and investment feasibility analysis," Resources, Conservation & Recycling, Elsevier, vol. 54(2), pages 79-85.
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    Cited by:

    1. Gu, Qianxin & Chen, Yang & Pody, Robert & Cheng, Rong & Zheng, Xiang & Zhang, Zhenxing, 2015. "Public perception and acceptability toward reclaimed water in Tianjin," Resources, Conservation & Recycling, Elsevier, vol. 104(PA), pages 291-299.
    2. Barbara Ruffino, 2020. "Water Recovery from Floor Cleaning Operations of Industrial or Public Areas: The Results of a Field Test," Resources, MDPI, vol. 9(3), pages 1-17, March.

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