Evaluation of custom-made and commercial greywater treatment systems: A case study from Oman

M. Ahmed*, S. Al Sidairi, S. A. Prathapar, S. Al-Adawi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


This paper reports a study to evaluate two types of greywater treatment systems; commercial and custom-made. Commercial greywater treatment systems are expensive for small quantities. Therefore, a cost-effective, low maintenance treatment system was designed to collect, treat and re-use ablution water from small- to medium-sizes mosques. The system included a sand trap, an ablution water collection tank, a filtration unit, chlorination chute, and treated water collection tank. Treatment and re-use was automated using submersible pumps and timers. The study revealed that both the commercial and custom-made systems were capable of treating greywater to satisfy relevant government regulations in Oman. The financial analysis showed that the internal rate of return (IRR) for custom-made and the commercial systems for the mosques were 14.9% and 19.06% respectively. IRR for the commercial system at private house was -1.44%. Costs of the systems and the amount of greywater treated were the main factors affecting the IRR.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalInternational Journal of Environmental Studies
Issue number1
Publication statusPublished - Feb 2008


  • Greywater
  • IRR
  • Oman
  • Treatment
  • Wastewater re-use

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Ecology
  • Waste Management and Disposal
  • Pollution
  • Computers in Earth Sciences


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