ON-SITE, ON-DEMAND: RETHINKING WATER DISINFECTION FOR THE CONNECTED PLANT
Across both industrial and commercial estates, water treatment infrastructure is being asked to meet a widening set of demands: regulatory compliance, operational resilience, energy performance, and increasingly, integration with the control and monitoring systems that govern the rest of the built environment.
These are the same priorities driving specification decisions everywhere else in the plant, yet water disinfection is one area where legacy practice often persists unchallenged, even as automation and IoT connectivity transform decision-making across every other system. That gap has consequences: for compliance, for plantroom design, and for the operational data that most engineers now expect as standard from every system on site.
The limits of legacy dosing
Bulk sodium hypochlorite dosing remains the default disinfection method across many commercial and public buildings, as it’ s familiar and widely understood. Familiarity, however, is not the same as suitability. Stored hypochlorite is chemically unstable: it degrades progressively, accelerated by heat, light and prolonged storage, meaning the concentration held in a bulk tank is never fixed.
Any system relying on stored solution for consistent disinfection is, by definition, dosing from a chemistry in continuous decline. Maintaining reliable residual levels demands ongoing manual adjustment, and the margin for error narrows as the solution ages, a poor fit for operations that increasingly expect predictable, auditable performance data from every system they run.
On-site generation, engineered for integration
Electrochlorination offers a different model. Sodium hypochlorite is generated on-site, on-demand, from salt, water and electricity via an electrolytic process. The underlying chemistry is established; what has changed is the sophistication of the systems delivering it. Current-generation platforms, including our
34 MACHINERY, AUTOMATION, CONTROL & ENGINEERING