Sewage new lease of life to save half of the water for the city - water, drinking water, alkaline water - water industries

Sewage new lease of life to save half of the water for the city - water

, drinking water, alkaline water - water industries

Recycled water use, the growing tension in the current global water resources, gradually become States in the Exploration and reasonable use of water resources in a consensus process. All along, the city Sewage Recycling and drinking water supplies are two different water system, although some of the world countries have long had on the development and use of reclaimed water, but they generally only the recovery of industrial or domestic wastewater processing, then for the city industrial water, agricultural irrigation and groundwater recharge areas. As the first large-scale use of renewable water resources of the countries, since 2002, Singapore took the lead research and development through Membrane Technology to extract clean water from sewage, and reservoirs in the untreated natural precipitation mixture, after treatment for residents to drink.

Early seventies of last century, Singapore has already begun to transform the water of clean water, but due to technical immaturity and the cost was too high, the project was halted. In 1998, Singapore re-launched clean water using membrane technology research and development success in 2002. Detection over the years by experts, fully meet the World Health Organization drinking water standards. Singaporeans put this recycled water affectionately known as the "new water", meaning that through technological means, sewage lease of life.

In research and production of new water in 10 years, the Singapore government investment to convert the city's water supply network of sewage pipes and water pipes butt together to form a unified whole city loop pipe network. Public water, the sewage into the deep tunnel sewer systems, collected the first to be sent to the first sewage treatment plant sludge filter program. Then, the filtered water is fed new water plant, they have to go through micro-filtration, Reverse Osmosis Filtration and UV disinfection procedures 3. The first micro-filtration, is full of holes through the biological filter fibers, the water particles with diameters greater than 0.2 micron filter out. This also ensures that the process does not occur the next precipitation phenomena. Second Reverse Osmosis Filter, is to use the pressure to reverse osmosis water through the translucent membrane. Because of this film is less than 0.0001 micron pore size, through this process, including viruses, pesticides account for 95% of the inorganic and organic dissolved solids to be filtered. The third UV disinfection to remove the remaining water may be bacteria and viruses, and add some alkaline material and water to the acid-base balance. After this rigorous process three treated water, water plant processed more than tap water out of much higher purity can be directly consumed.

Extracted directly from the water pure drinking water, technically proven they can accomplish, the greatest difficulty lies in the residents to overcome the psychological barrier. To this end, Singapore is working through the new water plant receiving domestic and foreign visitors to a tour of the manufacturing process witnessed the new water, new water to help the public overcome the contradiction.

Director of the Singapore Public Utilities Board water Chenyu Ren told the author, 2010, Singapore 5th Block, new water plant, once operational, is expected to meet 30% of Singapore's water needs across the island. The recovery of effluent re-use, can save half the water for the city, which is Singapore's future goal. However, considering the residents of the acceptance of new water, at present, the vast majority of these new water delivered to industrial areas as production water, only a small part was sent to the city reservoirs, and water mixed and processed through the water plant distribution to the households. It appears that new water well into people's daily life should also need a process.

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