Why water from the sewage why not salt water
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My topic says it all
Why desalinate waste water why not salt water ?
I would like to point out something ,
the price singapore paid for the same ammount of raw water is the same as 75 years ago -
Because Desalinated water is not as clean as Newater... especially if one take into consideration of the sea water quality around singapore.... secondly.... in terms of purity of water....Originally posted by brotherlone:My topic says it all
Why desalinate waste water why not salt water ?
I would like to point out something ,
the price singapore paid for the same ammount of raw water is the same as 75 years ago
Newater is a nanofiltered water that is so advance.. only water molecules can pass through.... its purity is almost 100 percent.... the other molecules that might pass through the filter are oxygen molecules..... as we can see here.. Using Newater... we are talking at the molecular level of purity ( not even your 999.9 gold bar can compare) the pore of the filter paper is so small.. even petroleum by product like methane and ethane cannot get through... (these by product are pretty abundant in the sea around singapore)
Desalinated water is next in terms of purity... buts its energy intensive in production... Desalinated water is however likely to be contaminated by low weight, low boiling point molecules... which means that it is very likely that when you drink desalinated water.. chances is... you are drinking some molecules of petroleum byproduct like methane and ethane as well....plus other nasty chemicals which may harm your body in the future... but we cannot removed it using desalinating method... especially if the chemical has a boiling point close to that of water +/- 25 degrees....
Lastly... the filtered water that we currently are using... lets just say..... if tomolo i go to the singapore reserviour and pee... i can guarantee that ... using the present system...everyone in singapore will get to taste the Uric acid, Urea and other waste in my urine ... though at a highly diluted level... but... its there... i guarantee it... dont believe send the water for chemical analysis.... -
Don't need to elaborate so much lar.....
the reasons for not using "salty" water for general usage:
1. very high cost in changing all pipping to avoid corrosion
2. deposit content is always high
3. re-processing is much more tedious
4. re-processing equipments all need to change to able to within higher salt contents
5.........much more...
Hope I have let u learn something... -
thanks for those answers , appreciated
can Newater water plants filter other liquids ? only sewage ?
i know this is stupid , what if one day Singapore is short of waste ?
so no water ?
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Newater is a nanofiltered water that is so advance.. only water molecules can pass through.... its purity is almost 100 percent.... the other molecules that might pass through the filter are oxygen molecules
besides rust sendiments and bacteria
what about those usefull irons we need for our body , filtered out too ? [/quote] -
Any minerals like irons in water is in such small amounts you get more from the food you eat even if you have only one meal per day. Even if there is a need to have the minerals in the water you can always add them later by mixing the treated reserviour water to Newater which is if I remember correctly what will be done to improve the taste of the water.
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newater isn't desalinated waste water. its waste water that has gone through reverse osmosis (micro-filtration) and therefore uses very little energy.Originally posted by brotherlone:My topic says it all
Why desalinate waste water why not salt water ?
I would like to point out something ,
the price singapore paid for the same ammount of raw water is the same as 75 years ago
the only way to purify sea water to a satisfactory level is distillation, which is basically boiling off the sea water and condensing the steam to get water. the energy required to boil off such large amounts of water is way too much for this method to be viable. and certain impurities which have a lower boiling point than water would also end up in the distilled water.
so the reason newater is used is both because it uses very little energy (almost no energy at all is used in the purification process itself) and the water is cleaner. -
also, salt cannot be filtered out of sea water.
if you know some chemistry you'll know that salt water is a solution, and the salt in the water cannot be filtered out at all. you have to boil it off and condense the steam.
salt water is a solution, whereas waste water is a mixture, hence the impurities in waste water can be filtered out. -
How do the Newater method get rid of the salt or other similar stuffs in the water?Originally posted by chamenos:also, salt cannot be filtered out of sea water.
if you know some chemistry you'll know that salt water is a solution, and the salt in the water cannot be filtered out at all. you have to boil it off and condense the steam.
salt water is a solution, whereas waste water is a mixture, hence the impurities in waste water can be filtered out. -
hmm.....good question...if i'm not wrong waste water doesn't have as much salt as sea water?Originally posted by LXC:How do the Newater method get rid of the salt or other similar stuffs in the water?
seriously though, i'm not very sure. maybe someone else can englighten us
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anyway,
new water is even more pure than your current tap water.
need i say more? -
it wont be filtered out
salt is ok in moderation