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An example of the typical cost for a domestic reed bed system (for 4-6 people) would be about 450,000Kshs and for a hotel with 50 beds approximately 2,000,000Kshs. A constructed wetland (one gravel bed and three ponds) for a flower farm might be in the range of 2.5million Kshs depending on water quality and volume. These amounts represent the total cost for design and construction.
The savings achieved by using such a system can
be calculated based on information about your water usage. The water
recycling achieved at a typical domestic site can be as high as 80%, reducing water bills significantly whilst still allowing for
irrigation. This may be in the range of 10,000 to 50,000Kshs over
the course of the year for a domestic household.
Area required for the reed beds is dependent on
the topography, soil type and waste type. For an efficient combination
system, a value of 2-3m2/person can be used, a minimal area when
compared with the economic and environmental benefits.
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