Greywater Purifier Desalination System

The post explains a simple grey water purifier, desalination design arrangement which can be used for recycling greywater into pure usable distilled water completely free of cost through solar heat concentration. The idea was requested by Mr. Luis Gomes Machado

The Request
Hi Swagatam,

Best Regards/Cordial Saludo

Luis Gomes Machado

The Design

Whether its Greywater or sewage, any form of impure water can be easily converted into a pure distilled water using solar heat which is amply available on this planet, especially within the tropical areas where sun heat is abundantly accessible.

I have already discussed a similar concept for desalinating sea water in large quantities and also how to make drinking water from sea water, the present greywater purifier, desalination design is implemented using the same theory of evaporating/cooling waste water through concentrated sun rays.

The following simple arrangement using a concave polished metal and the associated mechanisms can be used for concentrating sun rays at the calculated focal points.

As can be seen in the above diagram, sun rays incident on the polished concave mirror or sheet is reflected back at an inward 45 degrees to concentrate over the centrally elevated pipe, running throughout the length of the sheet.

The concentrated sun rays over this pipe can be expected to be extremely high in temperature, in the region of around 150 C, enough to force water to evaporate.

Since the intended greywater is passed into the pipe, as indicated, this water inside the pipe is bound to reach its boiling and evaporation point quite quickly releasing water vapor from the other side of the pipe, which may be collected and condensed in an overhead tank.

This collected water can be expected to be 100% clean and could be used for any desired household work, such as for washing clothes, bathing, washing utensils etc.

Many such concave mirror based greywater purifier, desalination system could be installed within a given premise for implementing the above discussed conversion of waste water to clean water through solar heat, completely free of cost, and without using any electricity.