Glossary of Terms

Brackish Water:

Brackish water is used in reverse osmosis systems. Brackish water is technically defined as water having TDS levels up to 6,000 Mg/L, but is generally water that is too salty to be considered potable, but not salty enough to be considered seawater. The World Health Organization (WHO) salt limit for potable water is 1,000 mg/L TDS. By comparison seawater ranges from about 33,000 mg/L to about 40,000 mg/L.


Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earths crust. Boron is concentrated on Earth by the water-solubility of its more common naturally occurring compounds, the borate minerals.


Desalination is a process that removes minerals from saline water. More generally, desalination refers to the removal of salts and minerals from a target substance, as in soil desalination, which is an issue for agriculture. Salt water is desalinated to produce water suitable for human consumption or irrigation.


Dewatering is the removal of water from sediment or waste materials.


Distilled water, is water that has many of its impurities removed through the process of distillation. Distillation involves boiling the water and then condensing the steam into a clean container; impurities dissolved or suspended in water cannot transform to vapor phase with water, so they are left behind in the “brine”. Water that has been distilled is ultra-pure, and may taste flat compared with other water, so it is general not used for drinking purposes. Distilled water is frequently used for medical, dental, or industrial processes. Some bottleless water coolers offer distilled water, which may be convenient and cost-effective for low-volume applications.


E-Cell electrodeionzation system, designed for ultrapure makeup water used in combined cycle gas turbine power systems, and steam turbines.

Emergency Mobile Ro Systems:

Our pre-built Reverse Osmosis System in a mobile trailer for short-term emergency needs. For plant downtime, facility maintenance, emergency drinking water during hurricanes, earthquakes, etc.


Fouling is produced refuse. Such matter enters into the cooling water circuit through the cooling water pumps from sources like the open sea, rivers, or lakes.


Gallons per minute, a unit of volumetric flow rate.


Microfiltration (commonly abbreviated to MF) is a type of physical filtration process where a contaminated fluid is passed through a special pore-sized membrane to separate microorganisms and suspended particles from process liquid. It is commonly used in conjunction with various other separation processes such as ultrafiltration and reverse osmosis to provide a product stream which is free of undesired contaminants.


Nanofiltration is a process similar to reverse osmosis but it is less effective at removing dissolved solids. Nanofiltes are commonly referred to as membrane softeners because they will usually reject the double-positively charged hardness ions (i.e. calcium and magnesium) fairly well but cannot reject the single-positive charged soft ions (e.g. sodium and potassium).

Nominal Active Surface Area:

The active membrane area is defined as the available surface of membrane within an individual element, or within a system through which permeate can pass.

RO Membranes:

reverse osmosis membrane is a semipermeable material, i.e. material through which water passes relatively quickly, while other substances cannot (or do so relatively slowly). Membranes provide the barrier layer or interface for the cross flow separation. RO membranes are made from a thin, porous material constructed of organic polymer (e.g. cellulose acetate, polyamide and charged polysulfone). Reverse osmosis membranes will typically reject contaminants with molecular weights greater than 200. Ultrafiltration membranes will reject contaminants with molecular weights between 10,000 and 0.1 micron.

Reverse Osmosis (RO) Water filtration:

is a water purification technology that removes dissolved solids from drinking water. Dissolved solids are small organic and inorganic particles that ate suspended in water. Dissolved solids vary by location, but include chemicals like salts, calcium, and phosphates. Water with high total dissolved solids (TDS) levels often appear cloudy and can have “off” odors.

Stabilized Salt:

Systems that are sterically stabilized tend to remain well dispersed even at high concentrations.

Permeate Flow:

finding the proper balance between acceptable permeate production and reduced membrane fouling is crucial, and why the process math is so important.

Pharmaceutical water:

High-purity water is the lifeblood of biopharmaceutical manufacturing. Given manufacturing challenges and priorities, a growing number of biopharmaceutical companies are opting to outsource water treatment, drafting service contracts with their water equipment vendors.