1. Algaecides: Algaecides are chemicals that kill algae and blue or green algae.
++ Examples are copper sulphate, iron salts, rosin amine salts and benzalkonium chloride.
++ Algaecides are effective against algae. .
2. Antifoams: Antifoam blends contain oils combined with small amounts of silica.
++ They break down foam thanks to two of silicone's properties.
++ Antifoam compounds are available as powder or as an emulsion of the pure product.
3. Biocides: See disinfectants
4. Boiler water chemicals: Boiler water chemicals include all chemicals that are used
Oxygen scavenging; Scale inhibition; Corrosion inhibition; Antifoaming; Alkalinity control.
5. Coagulants: When referring to coagulants, positive ions with high valence are preferred.
++ Generally aluminium and iron are applied
++ To adjust pH levels Ca(OH)2 is applied as co-flocculent.
6. Corrosion inhibitors: There are five different kinds of corrosion inhibitors:
++ Passivity inhibitors (passivators); Cathodic inhibitors; Organic inhibitors;
++ Precipitation inducing inhibitors; Volatile Corrosion Inhibitors (VCI).
7. Disinfectants: Disinfectants kill present unwanted microrganisms in water.
++ There are various different types: Chlorine; Chlorine dioxide; Ozone; Hypochlorite
8. Flocculants: To promote the formation of flocs in water that contains
++ Suspended solids polymer flocculants (polyelectrolytes)
9. Neutralizing agents (alkalinity control): In order to neutralize acids and basics.
10. Oxidants: Chemical oxidation processes use (chemical) oxidants to reduce COD/BOD levels
++ Remove both organic and oxidisable inorganic components.
++ The processes can completely oxidise organic materials to carbon dioxide and water.
++ Examples are: Hydrogen peroxide; Ozone; Combined ozone & peroxide; Oxygen.
11. Oxygen scavengers: preventing oxygen from introducing oxidation reactions.
12. pH conditioners: The pH will be converted to approximately seven to seven and a half.
13. Resin cleaners: Ion exchange resins need to be regenerated after application.
14. Scale inhibitors: are surface-active negatively charged polymers.