Comparative evaluation of the economic effectiveness of using chlorine-containing media in water disinfection technologies

Summary

An engineering and economic comparison of three methods of water disinfection using: gaseous chlorine, high concentrated sodium hypochlorite and low concentrated sodium hypochlorite is presented. A comparative analysis was carried out using the example of an operating chlorination plant located on the territory of the wastewater treatment facilities in the city of Leninsk-Kuznetsky, Kemerovo Region. The economic analysis has shown that the use of low concentrated sodium hypochlorite compared to high concentrated sodium hypochlorite is beneficial, as the payback period is reduced. This confirms the expediency of using this technology since it provides for implementing a socially oriented tariff policy for consumers to a greater extent. Besides, while choosing a chemical, its advantages should be sought in the safety of delivery and storage, technological effectiveness in use, the amount of by-products in the preparation of the product at the place of use, as well as the delivery price of a chlorine-containing chemical or the cost of apparatus that produce it directly at the premises of the water treatment facilities from purchased raw materials.

Key words

gaseous chlorine , low-concentrated sodium hypochlorite , direct water electrolysis , high concentrated sodium hypochlorite , comparative analysis