Water Treatment Plants

What is Water Treatment?

  • Surface water consisting of rivers, lakes & streams and ground water consisting of dug wells, tube wells & industrial bore wells fulfil water requirements for human consumption and commercial or industrial use.
  • But, quality parameters of most of these natural water sources do not meet quality requirements for human consumption and commercial or industrial use.
  • Water treatment enhances quality parameters of natural water sources to meet quality requirements of human consumption and commercial or industrial use.
Surface Water and Ground Water
Surface Water and Ground Water in the Natural Water Cycle

Common Undesired Quality Parameters and Contaminants

Common Water Treatment Processes

Treatment for turbidity, taste/odour and hardness.

Granular filter, GAC column & ion exchange resin column 

Water Treatment Plant for Treatment of Bore Well Water for Drinking

Treatment for dissolved solids

RO Plant for Treatment of Bore Well Water for an Industrial Application

Innovative Water Treatment Solutions

• Vacuum Evaporation for Recovery of RO Reject
  • Substantial proportion of feed water (60% -40%) goes to the drain from an RO plant as RO reject depending on the incoming water quality, required output water quality and performance of the RO plant.
  • RO reject contains quite high concentrations of dissolved solids and that is why it is of no use and wasted.
Feed, Permeate & Reject of an RO Plant
Internals of an RO Module
Vacuum Evaporation Principle
  • Using vacuum evaporation technology, substantial proportion of RO reject can be recovered as water with low concentrations of dissolved solids.
Ozonation for Disinfection of Water
  • At room temperature and pressure, Ozone is an unstable gas soluble in water.
  • Ozone is used for water disinfection as well as sanitisation of process equipment and pipework. Also, ozone is used for disinfection during CIP (Clean in Place) of process equipment.
  • Ozone offers a lot of pluses compared to chlorine.
Ozone Disinfection Principle
  • An integrated Ozone generator generates ozone from atmospheric oxygen and generated  ozone is dissolved in water.
An Integrated Ozone Generator

The Central Environmental Authority (CEA) is established under the provisions of an act of the parliament of Sri Lanka. The CEA is granted with a wide set of regulatory powers under the National Environment Acts.

The Ministry of Environment and Natural Resources has the overall responsibility in the affairs of the CEA with the objective of integrating environmental considerations in the development process of the country.

For legal compliance of any building or facility, discharge of waste water in to the environment is required to be complied with the guidelines stipulated by the CEA.