« on: 07/04/2021 18:54:03 »
probably for now osmotic filters are bargain as quality price and availability, but how any nano filters compare to them I am not sure. probably as new potential technology mxens in time will become cheapest and most useful filters but how soon I am not sure ... what is more intriguing is whether any of these could be DIY doable ...
There are a number of different types of water filters for different situations. Many could be DIY (or in part DIY).
- The simplest "filter" is simply a sediment trap. Bring water into a tank, and allow any suspended particles to settle to the bottom.
- A sand filter can be small or large, and consists of running the the water through a container of sand. In many senses, in low density housing, a well or spring acts like a natural sand filter (as long as it isn't contaminated).
I'd be curious if one could augment a sand filter with a layer of carbon. Perhaps even a DIY carbon source. I'd probably do a layer of gravel then a layer of sand then the carbon then more sand.
- "Hard water" generally has dissolved minerals in it. And, different minerals act differently.
Mom has Iron in her water. The filter system oxidizes the water, then filters out the iron oxide, and flushes it back out.
Ion exchange filters are common for calcium and perhaps magnesium. Substituting Sodium (Na+) or Potassium (K+) for the Calcium (Ca++) or Magnesium (Mg++). My grandmother had a sodium ion exchange filter, and I thought I could taste the salt but perhaps they had it adjusted improperly. They also restricted my grandfather's sodium intake for years while putting bags of salt into the water filter. I think they had enough salt in the water that while it prevented calcium buildup, it did cause corrosion
Many of the ion exchange type filters are basically a tank with a catalyst medium that you flow water through, then periodically flush. You should be able to purchase the catalyst, but getting the timers for automatic flushing would be tricky.
I'm not sure about osmotic and nanofilters. One trick that will help is to have multiple filters, so if you have a very expensive last filter, you're gone through layers of sand, charcoal,and other filters,so you have very clean water going into the special filter.
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