Grey Water Recycling System for a Community of 404 Houses

摘要

What is Grey Water? Grey water is of lesser quality than potable water, but of higher quality than black water. Black water is water flushed from toilets, water from the kitchen sink, garbage disposal and dishwasher because of high concentrations of organic waste. Grey water, however, comes from other residential water uses. Water from the bath, shower, washing machine, and bathroom sink are the sources of grey water. Grey water is most suitably used for subsurface irrigation of non-edible landscape plants and filling the tanks of toilets. Grey water can supply all the irrigation needs of a domestic dwelling landscaped with vegetation of a semi-arid region. The amount of water a household uses for interior and exterior purposes determines to some extent the family' s potential grey water supply and demand. A percentage of a household' s interior use represents supply, and its exterior applications generally represent demand. Of all wastewater produced in a household, grey water makes up about 60% of the total usage.