Calcium nitrate is a well-known solution for limiting H₂S formation in sewer networks. Its action is primarily preventive: directing the biological activity of the environment to reduce sulphide formation. This approach can be relevant in certain configurations, but generally requires significant product volumes, sufficient retention time and continuous sizing. In networks with longer retention times, calcium nitrate-based treatments may require higher volumes in order to maintain sufficient preventive action throughout the hydraulic zone concerned.
Nitrate de calcium
Enviro-Chem Cx
Action logic
Nitrate de calciumPrimarily preventive, with action dependent on retention time and the biological balance of the network.
Enviro-Chem CxPreventive and corrective: reduction of sulphide formation at source and neutralisation of a portion of sulphides already present.
Medium or long retention time
Nitrate de calciumCan be relevant when the network offers sufficient retention time to establish a preventive biological action. However, the longer the retention time, the more it may be necessary to maintain sufficient nitrate availability throughout the hydraulic path, which can increase dosed volumes.
Enviro-Chem CxEnviro-Chem Cx's action does not depend on extended retention time to produce its effects, which facilitates sizing in networks with variable hydraulic profiles.
Response to H₂S already present
Nitrate de calciumLimited effect on H₂S already present, as the action mainly targets preventing future formation.
Enviro-Chem CxCopper reacts with dissolved sulphides and rapidly reduces part of the H₂S release potential.
Dosing and logistics
Nitrate de calciumOften high doses, particularly when it is necessary to maintain sufficient active concentration over long or biologically active stretches, with more storage, transport and handling requirements.
Enviro-Chem CxLow dosage and more compact solution, reducing volumes handled on site.
Odour spectrum
Nitrate de calciumPrimarily targeted at sulphides / H₂S.
Enviro-Chem CxBroader action on complex odorous nuisances, including certain sulphur, nitrogen and organic compounds.
Field flexibility
Nitrate de calciumRelevant when the network offers favourable conditions for preventive biological action.
Enviro-Chem CxSuitable for situations where both a rapid response to an existing nuisance and upstream preventive action are sought.
In practice, Enviro-Chem Cx is particularly relevant when nuisances are already established, when product volumes become constraining, when odours are not limited to H₂S alone, or when a strategy combining immediate response and prevention is sought.
Compare your current treatment with Enviro-Chem Cx
Send us your nitrate volumes, H₂S levels, flow rate and network configuration. We can prepare a first comparative estimate of dosing, volumes handled and potential operational savings.
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