A Study of Car Wash Wastewater Treatment by Cyclo-Flow Filtration

Ching Yao Hu, Wen Hui Kuan, Li Wei Ke, Jung Ming Wu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


With the increase in transportation demand and facilities in this era and the significant improvement in people’s living standards, the annual production and sales of vehicles are steadily increasing. With this, the issues of car wash wastewater treatment and water pollution are becoming more and more serious. Car wash wastewater mainly comprises fine sand, slick oil, suspended solids (SS), and surfactants, and can be quantified as chemical oxygen demand (COD) on a normative basis. This study examines the use of cyclo-flow filtration with high filtrate flux to treat car wash wastewater to solve issue of limited space in metropolitan areas and increase the willingness of the industry to invest in car wash equipment to recover water resources. The average removal rates of SS and COD are about 81% and 43%, respectively. Compared with current technology, the price of recycled water can compensate for operating costs, requiring minimal operating space owing to the single-unit cyclo-flow filtration system.

Original languageEnglish
Article number1476
JournalWater (Switzerland)
Issue number9
Publication statusPublished - May 2022


  • carwash
  • COD
  • cyclo-filtration
  • SS
  • wastewater

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Biochemistry
  • Aquatic Science
  • Water Science and Technology


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