RO is a form of filtration using osmosis in reverse. Water passes from a more concentrated solution to a less concentrated solution. To accomplish this a force or pressure MUST be applied . RO requires 1 psi of pressure for every 100 ppm of TDS. RO is used to remove dissolved solids from water but it can also improve taste, odor & color of water. RO membranes have the capability to remove particles as small as ions i.e. magnesium ions or sodium ions. RO membrane will reject most compounds based largely on size. Dissolved ions, such as salts, carry an electric charge and will also be rejected by membrane.
Feed water flows into RO unit with the force of line pressure. Water is forced through membrane by cross flow filtration. Cross flow filtration is most commonly used in RO as it allows membrane to continually clean itself. Membrane then either rejects or repels contaminants. Two exit streams generated: waste & product stream. Waste stream consists of: A concentrate (reject) stream which carries contaminants (compounds too large to pass through membrane) Permeate stream consists of: Product water which has been forced through the membrane & is virtually free of TDS.
Dissolved solids = TDS (salts & minerals) – UP TO 2000 ppm
Most Heavy metals (lead, mercury, silver)
Most radioactive elements
RO systems may not be capable of removing nitrates to recommended levels
High pressure pump
RO purifier needs a electricity to run high pressure pump or ultra violet light.
If some remote area electricity is not available then we use solar operated RO.
For operate RO in Night time we use a Battery.
When Ro is not in use that time solar energy use for other purpose.
It save electricity.
Drinking pure water is very important to children’s developing immune systems. Water filters such as reverse osmosis systems provide the healthiest water for them.
Low Energy Requirements.
RO performs a separation without a phase change. Thus, the energy requirements are low
Less Space requirements.
RO systems are compact, and space requirements are less than with other desalting systems, e.g. distillation
Little labor required:- Many RO systems are fully automated and designed to start-up and shutdown automatically through interlocks. Thus, RO plants usually require little labor.
Easy maintenance:- Due to their modular design, maintenance is easy. maintenance can be performed without shutting down the plant. Also the expansion of plant is an easy option.
Remove unpleasant smell:- RO removes dissolved minerals and other contaminants that cause to smell unpleasant.
RO rejected water Quantity is very high. .
To save water, rejected water shall be reuse .
RO rejected water can be stored in a separate tank.
Disinfected it using Chlorine By Automatic Dosing pump.
Re use this water for mopping, cleaning, Gardening & in Toilets.