The use of magnetic reagent clarification of drinking water to intensify water treatment processes

Abstract

Relevance. One of the urgent tasks associated with improving public health is the possibility of water consumption, in terms of quality, consistent with drinking water standards. At the same time, according to WHO, only 1% of water from drinking and fishery sources on Earth is suitable for use without prior preparation. In all other cases, water treatment, including its disinfection, is simply necessary. Depending on the physicochemical composition of the water and its microbiological contaminants, one or another water treatment technology is selected. Aim. In this regard, at water treatment facilities, it is increasingly necessary to include new innovative solutions in the technological scheme that do not provide for the complete reconstruction of existing systems, but allow for the effective modernization of existing ones. One of the most promising solutions in this direction could be the use of methods for treating water with a magnetic reagent method. Methods. The technology of magnetic reagent water treatment is proposed, which allows to intensify the reagent clarification stage, without significant costs for the reconstruction of the facility. Experimental tests at the water treatment station made it possible to establish that magnetic treatment increases the coagulation rate of suspensions, reduces the required residence time of water in the clarifier, and reduces the consumption of reagents by 25-30%. Results. The article considers the main problem of the classical water treatment system associated with a high consumption of reagents and the need for a systematic selection of the optimal dosage for changing environmental parameters. It is shown that the proposed technology can be considered both as a modernization of existing water treatment plants operating according to the standard scheme, and when designing new facilities. Regardless of the complexity of the technologies used for surface water purification in the initial stage of purification, as a rule, the settling method is used, which is carried out by introducing coagulating reagents into the water to form flocs that include contaminants extracted from water. Despite its high efficiency, the use of this method involves both the consumption of expensive reagents and the need to constantly monitor their dosages, which is explained by continuous changes in surface water quality indicators over the seasons of the year.