NEWater is recycled sewage water.
Sewage water is treated at the waste water works, by the end of which it is ready to put into a local catchment. This treated sewage water enters the NEWater treatment plant. (NEWater Technology)
 |
| Figure 1. Entering Microfiltration (NEWater Technology) |
 |
| Figure 2. Close up on microfiltration (NEWater Technology) |
1. Water molecules pass through pipes of hollow fibres as shown below, trapping large solid substances, ie. bacteria and protozoa. They usually trap anything larger than approximately 0.2 microns in size. The water molecules in the Figure2 will pass through, however larger substances will not.(NEWater Production Process)
 |
| Figure 3. Reverse Osmosis (NEWater Technology) |
2. Water molecules undergo reverse osmosis. In this stage, upon pressure, the filtrate from the first stage pass through a semi permeable membrane which does not allow substances larger than 0.0001 microns in size to pass through. Viruses, metals, disinfectants, inorganic substances such as chlorides and sulphates removed. By the end of this stage, the water is already of high quality.(NEWater Production Process)
 |
| Figure 4. Water molecules undergoing ultraviolet radiation (NEWater Technology) |
3. Water molecules bask under ultraviolet radiation for disinfection purposes, to kill any harmful particles such as bacteria or viruses that managed to resist the previous stages. Chemicals may also be added to acquire desired pH balance. (NEWater Production Process)
