Automatic monitoring: Levels, valves, pumps, filters and backwashing are all controlled by the PLC. There is no need to adjust anything on the system but the alarm monitors on the PLC must be checked daily. Effective disinfection Contamination in greywater systems is cause for concern among facilities managers. If treatment is not carried out effectively, contamination could occur, resulting in health side effects "Effective disinfection is achieved by subjecting the target organisms to fixed concentrations of a disinfectant, such as chlorine, bromine or ozone, for a known period of time."

 

"Compared with conventional disinfectants, ozone achieves superior disinfection at lower chemical concentrations and within shorter contact periods." Ozone is used as an oxidizing biocide to destroy microorganisms in water and to oxidise many hydrocarbon chemical compounds, as well as some inorganic contaminates such as iron and manganese, ozone destroys organic and toxic pollutants in water and oxidises inorganic elements so that they can be filtered out and removed from the water supply. "The type of organisms targeted, as well as the overall ozone demand of the water, dictate the level of ozone residual required for disinfections. With the correct operating parameters and ozone dosages, an ozone system could achieve thorough disinfections at lower cost."