How to remove Chlorine (dechlorination of water) from the feed water before Reverse Osmosis Desalination or prior to Discharge

Dechlorination of water before reverse osmosis desalination

Concentration of residual Chlorine after disinfection or oxidation is often too high for distribution, discharge to the environment or for other downstream processes such as reverse osmosis desalination.
Amongst other methods, chemical dechlorination by means of Sodium Bisulphite (NaHSO3) is very common for various reasons:
The reaction between Chlorine and Sodium Bisulfite is practically immediate, comes at a lower costs than other chemicals and is widely available

Dosing Control in Water Chlorination: Flow-Paced plus Residual Feedback

Dosing Control in Water Chlorination and Water Disinfection

Feedback dosing control, where a flow-pace control is combined with a residual Chlorine or ORP sensor feedback reading, is the best available dosing control for disinfection or oxidation. However, the lag-time between the dosing point and the sensor reading can be problematic when the feedwater quality is inconsistent.

Bacteria, Virus and Micro-organisms: Understanding Water Disinfection

Bacteria, Virus and Micro-organisms in Water: Commercial and Industrial Water Disinfection

Disinfection plays a major role in drinking water supplies, being the final stage before its distribution. However disinfection is also a critical part of commercial and industrial water supply systems: hospitals, cooling towers and food processing are examples these industries.

Turbidity: top Key Parameter in Water Disinfection

Turbidity in water as key parameter in water disinfection

Turbidity of water is a key parameter in drinking water quality and makes disinfection more difficult.

Modern filtration media, based on activated alumino-silicate glass, can deliver a higher water quality, with at least 50% lower chlorine oxidation demand than an equivalent sand filter.