Reverse osmosis (or nanofiltration) is a great way to achieve purified water for any application you need it for, whether it's used for drinking, cooking, brewing, growing, cleaning, or others. Some users have found that a certain mineral content is desired to bring out flavors in a craft beverage or assist in the development of young plants, so these purification systems are equipped with a special blending option to raise your TDS levels.
When there is a desire for raising the TDS, we will include a TDS blending option preinstalled on our RO systems. TDS blending is incredibly simple and involves mixing your starting water source with the RO water to achieve a TDS that's desirable to your application. Since we include attached prefiltration, the feed line between the prefilter system and the RO pump is tapped so we're using filtered water, not raw water, to blend with the purified RO product water. This filtered water is plumbed to a needle valve and the outlet of this valve is plumbed to a tee on the product water line coming out of the membrane vessel. This tee is located right before the TDS sensor so you can monitor the quality of your blended water as you adjust the needle valve.
This TDS blending option is best utilized when you're using the RO system with an atmospheric storage tank and delivery pump for assured quality control. The pressure that lets the blended water flow into the product line comes from your existing plumbing water pressure, not the RO itself. This pressure is conflicting if a bladder pressure tank is used instead of an atmospheric tank. With a pressure tank, the blend ratio and corresponding blended TDS would change continually as the bladder tank pack pressure built up, thereby reducing the amount of blend water mixing into the product water. It's difficult to achieve a constant blend with this application, but with tweaking the consumer can make their blending work with a pressure tank.
It is very common for our craft beverage makers or agriculturalists to want to adjust specific levels in their water, such as calcium, magnesium, sodium, or other salts and minerals that may be beneficial to their specific product. The TDS blending option on these RO systems is made to simply adjust the levels of total dissolved solids in your water which is perfect if you just want an overall mineral content in your water. However, if you desire a specific set of minerals, reverse osmosis is best used as your blank slate to then build back up. Brewers and growers alike will add a mineral cocktail to the purified RO water to achieve the perfect water for their individual beverages or plants. What exactly is in this mineral cocktail? Large franchises and micro-businesses both prefer to keep their mineral mix a secret, so not even we can tell you exactly how to achieve your preferred levels! What we can do is provide purified water so you know exactly what's going into your premium craft.