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COLLECTION AND FILTERING OF RAINWATER-
V. Ryan © 2008 - 2009
This combined collection, storage and filtration system
is ecologically sound. Rain water is filtered as it collects on the roof
by the root system of the aquatic plants. This turns grey water into
usable green water. To filter the water further it is channelled in to a
storage/filtration system known as a StormBank.
|THE GROW SYSTEM AND STORMBANK|
|The GROW system is part of an inclined roof.
Usually the roof top is positioned to avoid the worst of prevailing winds,
protecting the growing plants. This type of system is best suited to
blocks of flats housing twenty to forty people. However, the system could
be adapted for the average household.
The system works by filtering grey water as it falls as rain onto the planted roof. The water runs through a series of gutters in which aquatic plants naturally filter the water. This produces green water which can be used for washing and showering. If used in public buildings an additional Storm Bank Rainwater Harvesting system could also be employed. This further filters the rainwater ensuring a very high level of purity (although still not suitable for human consumption).
1. Draw a detailed diagram or diagrams showing how the system shown above could be applied to a roof of a school or domestic dwelling. Add notes and labels.
2. What are the benefits of recycling water. Include the conversion of grey water to green water in your answer.
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