Why? *Studies have shown that 80% of water used in Omani households is greywater*.
Commercially available greywater systems (aka *greywater gadgets*) are too expensive for individual households and small mosques. Therefore, a low-cost low-maintenance treatment system was designed, constructed, and operated at a mosque.
David Manz developed with the exception of the activated carbon portion in the upper part of the treatment system.
The financial analysis showed that the internal rate of return (IRR) for the locally manufactured (Al Hail mosque sys- tem) and the commercial systems (SQU mosque) for the mosques were 14.9% and 19.06%, respectively. This shows that such systems will be cost effective. IRR for the commercial system at a private house indicated that such systems will not be cost effective. Costs of the systems and the amount of greywater treated were the main factors affecting the outcome of the financial analysis.
So if one is searching for a low cost, off-the-grid, greywater treatment system, this looks like a winner. However, it is not certain if this system will meet the stringent treatment standards for oxidizing the greywater required under Oregon's rules.
~ Former US Secretary of Defense Donald Rumsfeld