Sewage and wastewater disinfection is a critical task that demands unremitting attention, as it directly correlates with human health. Consumption of contaminated water sources may lead to mild symptoms at the least, or life-threatening conditions in severe cases. Thus, while ensuring effective sewage disinfection, strict control over residual chlorine levels post-disinfection is equally imperative.
Take chlorine dioxide (ClO₂)-based disinfection systems as an example: ClO₂ is dosed into sewage primarily for bactericidal or bacteriostatic purposes. Residual chlorine in such systems typically comprises ClO₂monomers, chlorite ions (ClO₂⁻), and trace amounts of free residual chlorine and combined residual chlorine—collectively termed total residual chlorine. If the proportion of effective disinfectants (e.g., active ClO₂) in the pipeline water accounts for only a small fraction of total residual chlorine, this indicates that under normal dosing conditions, residual chlorine in the water predominantly exists as chlorite ions.
This justifies the installation of RCl900 Online Total Residual Chlorine Analyzers at sewage and wastewater discharge outlets: the core objective is to monitor disinfectant dosage and maintain total residual chlorine within compliance limits.
Key Parameters for Online Monitoring of Medical Wastewater
1.pH Value:Defined as the ratio of the total amount of hydrogen ions to the total amount of substances in a solution. Excessively high pH increases alkalinity, while excessively low pH elevates acidity; both deviations from standard limits can induce water pollution.
2.Suspended Solids (SS): Refers to insoluble solid substances in water, including non-aqueous organic/inorganic matter, sediment, and microorganisms. It serves as a critical indicator for assessing the severity of sewage pollution.
3.Chemical Oxygen Demand (COD): A parameter measured via chemical methods to quantify the amount of reducible substances in water that require oxidation. It represents the oxygen equivalent of substances oxidizable by strong oxidants in wastewater treatment plant effluents or polluted water bodies.
4.Ammonia Nitrogen (NH₃-N): Nitrogen present in water in the form of free ammonia (NH₃) and ammonium ions (NH₄⁺). Nitrogen derived from fecal matter is unstable and readily decomposes into ammonia; total nitrogen (TN) is a routine indicator in wastewater testing.
5.Coliform Bacteria: A pivotal and mandatory parameter for medical wastewater testing, primarily used to evaluate the extent of fecal contamination in water.
