ya i am interested to see what my well water reads and what my filter system brings it down to. i will pm you with my information.
Osmosis is the passage of certain molecules through a membrane. For example, water will flow through a cell membrane. Membranes are semi-permeable, because they permit molecules that are small enough to pass while serving as a barrier to other molecules. For example, animal cells are surrounded by cell membranes which keep the contents of the cell inside but allow water to flow in and out.If solutions of differing concentrations are separated by a semi-permeable membrane, small molecules will flow through the membrane from the side with the most to the side with the least until the amounts on both sides of the membrane are equal. Frequently, water is able to pass through a semi-permeable membrane, since it is a small molecule, but solute molecules cannot. If this is the case, water will flow from the side with the lowest concentration (more water relative to solute) to the side with the highest concentration (less water relative to solute), diluting it until both sides are equal.
Reverse osmosis works by exerting pressure on tap water(brine) through a tightly packed membrane. It is reverse as the water flows from High concentration to low concentration, and then water continously is passed along the membrane to “wash” it, which is why we have such a high waste ratio. Since it is a type of mechanical, depth filtration, it cannot remove ionically bonded molecules, which is why we must use a di filter.
I know what it does and how it does it, i have google too lOl
The ro membrane is key to remove alot of stuff before hitting the di.
My question is this. What does it do that additional filter arrays can not do? My filter arrays remove about 75% or more of my TDS before going to my membrane. Is the remaining 25% simply to small to be filtered out? or is it simply an effiiciency issue? if i were to install a second filter array but still arrange them from large to small what would be the result? would i approach 0 TDS given that the single array removes upwards of three quaters of my TDS? There isnt a mechanical filter in the hobby that is removing elements one atom at a time ;D even a membrane. they are both removing large molecules made up from all kinds of good stuff. Does the membrane remove anything that the filters can not? is there anything harmful that the filters wont remove that must be removed by a membrane? These are the questions for wich i can not find answers. Im sure having a membrane and the resulting waster is “better”, but is it necessary?
[quote=“logans_daddy, post:22, topic:2415”]
My question is this. What does it do that additional filter arrays can not do? My filter arrays remove about 75% or more of my TDS before going to my membrane. Is the remaining 25% simply to small to be filtered out? or is it simply an effiiciency issue? if i were to install a second filter array but still arrange them from large to small what would be the result? would i approach 0 TDS given that the single array removes upwards of three quaters of my TDS? There isnt a mechanical filter in the hobby that is removing elements one atom at a time ;D even a membrane. they are both removing large molecules made up from all kinds of good stuff. Does the membrane remove anything that the filters can not? is there anything harmful that the filters wont remove that must be removed by a membrane? These are the questions for wich i can not find answers. Im sure having a membrane and the resulting waster is “better”, but is it necessary?[/quote]
I think this is what the ZERO WATER filters do. They are a 5 step filtration system and they arranged the media in a very specific sequence.
We flush membranes to extend their service life, has anyone tried to “flush” filters? I think the short life of filters are the biggest dig against this method. My tap water is around 100-150TDS on a given day. Its typically about 30-50 TDS after going through the filter array. I replace my filters once a year with very little decline in output TDS before then. Are the RODI filters just that much better than some of the drinking water filters or do the driking water filters do more? Unfortunately, with my setup, i have no room or need to experiment but its somethin i would be more than willing to help out with if someone else wants to give it a shot. Could be the DRC’s very first REEFBUSTERS if anyone is game.
logansdaddy, im sure you can use regular filters, if u can find something small enough. the membrane is bassically a very tightly packed depth/mechanical filter. a ro membrane alone cannot produce 0 tds. there are things the membrane cant take out. the smallest prefilter it spectrapure .2 micron zetazorb i think an ro membrane is around .02 microns.
i would help with an experiment. illbuy some ro canisters from brs and some filters.
I wonder how much running tap water through a 5 gallon bucket of sand and carbon would reduce the TDS by?
well the first waste water purification systems were gravel and sand beds that water was dripped through
[quote=“RCA, post:26, topic:2415”]
I wonder how much running tap water through a 5 gallon bucket of sand and carbon would reduce the TDS by?[/quote]
30 ft of south DE dirt filters well water to 200 TDS… (my dad lives out there)
Glen keep in mind your well water will change significantly from day to day. Also if you live any where near the state of Delaware your water is polluted in one form another. If you are away from the topic paint plants then vaccinated chicken crap may be the source and if you want any more specifics, Steph could give some insight.(she works for the state monitoring some of this stuff.) My friends always said the water tasted best at my parents house because we lived south of the dairy farm.
Tim, southern DE is a very broad term.
And it’s not just our water, it’s our air. I know people complain that air is bad in California but Delaware and New Jersey have to be ranked pretty high on the toxic air charts.
When I moved to Indiana, I was able to run three times as far and shaved a minute and a half off my mile time just from the air quality difference.