Some of our products are also used to remove pollutants that may not normally be considered as a priority for a wastewater treatment plant to deal with.
Sulphide removal
Sulphide precipitated by iron salts is the most commonly known odour compound in wastewater treatment plants. Sulphide is very toxic and also causes severe corrosion to equipment and concrete. Sulphide is produced by bacteria under septic conditions.
Our iron products can be used for removing sulphides from wastewater, thickeners and sludge treatment facilities. When used in sludge treatment processes the ammonia level can also be reduced, improving the working environment even further. Many of our products also affect the septic conditions so the formation rate of sulphide is reduced.
We can also offer a complete solution for odour and corrosion control – Kemira H2S-Guard – which was launched in 2008.
Heavy metals
Our products can precipitate and flocculate a number of the most commonly found heavy metals in wastewater. We can remove both particle-bound and dissolved heavy metals. By combining our coagulants and flocculants the treatment becomes efficient and the treatment plant can be made more compact.
We have a variety of other products to offer municipal wastewater treatment plants. Defoamers, antiscalants, oxidation agents, pH-adjusting products and activated carbon are a few examples. We can offer most of them on a global basis.