Дата публикации: 2017-10-23 03:27
Greywater is gently used water from your bathroom sinks, showers, tubs, and washing machines. It is not water that has come into contact with feces, either from the toilet or from washing diapers.
Gravity-based systems work only when the water flow is directed downward. If the garden to be irrigated is at a higher level than the house, the water has to be pumped uphill by an external pump. The drawback is that it involves additional energy expenditure in addition to the higher initial cost.
Here, a constructed wetland acts as a filter, cleaning up the greywater while nourishing the water plants with the nutrients it contains. This is more of an environment-friendly arrangement for the disposal of excess greywater.
It is paradoxical that government policies in many states still disallow greywater usage when less water to pump into the households and less sewage to be treated by sewage treatment plants means significant water and power savings all around. Safety concerns may be behind this, but drier states like Arizona, California and Texas that have liberalized their greywater policies have not reported any untoward incidents resulting from it.
This is another simple landscape-direct arrangement that diverts the water from the laundry to the yard to irrigate the trees in the garden. A valve diverts the water to a hose that carries it to a mulch basin dug around the trees. You can install this system yourself for as little as $75, but enlisting the help of a professional may cost you more.
Finally, your wish to reduce the load on the septic system by separating graywater presumes that it is the drainfield of your system that is limited, old or failing. But you should also have the septic tank pumped and inspected. It may need baffles, it may be damaged or leaky, it could have an unsafe cover, it may be small and require frequent pumping. And inspect the existing drainfield and D-box to see if there are alternate drainfield lines that can be switched into use, and to confirm that effluent is indeed entering all of the existing drainfield lines - all considerations that are very important in extending the life of the drainfield.
Use of large water storage cisterns has been a common practice for thousands of years and continues in modern use with plastic or fiberglass water storage tanks into which rainwater or in some areas even surface runoff may be channeled for future use.
Graywater is purified to a spectacularly high degree in the upper, most biologically active region of the soil. This protects the quality of natural surface and ground waters.