Buying a Quality Reverse Osmosis Machine

A quality reverse osmosis machine operates at an optimal level when it feeds into an atmospheric tank. An ideal reverse osmosis machine with an atmospheric tank will provide water that is exceedingly low in TDS because there is no back-pressure from the bladder of a pressurized storage tank. It is quite common for the TDS to be very close to 0 ppm when the unit has an atmospheric tank. A bladder tank can be used in applications that don’t require extremely low TDS, such as the food and beverage industry. On the other hand, for a manufacturing process that requires tremendously low TDS levels in the water, an atmospheric tank is the ideal solution.

It is imperative to have the proper pre-treatment to attain economical and successful operation of commercial and industrial reverse osmosis systems. The water needs to be as soft as possible, which usually requires the use of an antiscalant injection system as a pre-treatment method in your hardworking reverse osmosis machine. This will prevent any scaling of the ro membrane that would occur with the use of hard water. Additionally, AXEON Water Technologies offers Deionization Systems (DI) as a post-treatment option for a reverse osmosis machine for the use in ultrapure applications, such as laboratory and semi-conductor manufacturing.

But before any pre- and post-treatment is decided, the quality of the feed water must be decided. A water quality test should be performed to decide the levels of the following:

  • TDS
  • Hardness
  • Iron
  • Sulfide
  • Manganese
  • pH
  • Chloride
  • Silica
  • Sulfate
  • Barium
  • Strontium

It is very common for the usual reverse osmosis machine to lower the pH levels of the feed water. If the permeate water becomes too acidic (under 6.9) it can cause damage to the pipes, causing copper or other metal pipes to leach. In this case, it is important to raise the pH levels. The most common way to attain this is to add a Calcite Filter System after installing a reverse osmosis machine. Not only does a high pH level cause piping problems, but there are also health concerns with drinking acidic water over a long period of time.

If the feed water is too hard, that simply means that there are high levels of calcium and magnesium. Either a water softener or an antiscalant injection system would be an effective option to resolve this problem.

Not only is it important to decide what pre- and post-treatment is needed for your system, but it is important to also size your brand new commercial reverse osmosis systems properly. It is a good idea to decide how many gallons per day you will need before deciding on a new reverse osmosis machine. It is a good rule of thumb to add about 20% to this number to account for variation and margin of error. Also, keep in mind that the colder the water is, the more the gallons per day will decrease. Most common reverse osmosis machines are designed to operate at a temperature of 77°F. This is why it is important to size your new reverse osmosis machine based on the coldest water temperature the quality reverse osmosis machine will experience, which is generally the water temperature during winter.