DEVELOPMENT OF SMALL-SIZE REVERSE OSMOTIC INSTALLATION OF WATER TREATMENT FOR LABORATORY NEEDS
In the article the issue of improving the quality of cold water of centralized water supply systems due to post-cleaning is considered. A scheme of a small-sized reverse osmosis plant for final cleaning of tap water of cold water supply with a capacity of 10 liters per hour for purified water is given. The analysis of quality and safety indicators of samples of initial and purified tap water at the point of water supply in the laboratory of the Food Engineering Department in the Ural State University of Economics is given.Itwas found that the indicators of organoleptic evaluation of samples of the original tap and purified water were identical, which indicates the compliance of the initial tap water supplied to the laboratory with the requirements of SanPiN 2.1.4.1074-01. The hydrogenindexhaschangedfrom7.5±0.2to6.4±0.2.Theironindex(Fe,total)decreasedfrom 0.110 ± 0.025 to less than 0.1. Measurements of the total salt content of the initial and final water by means of a TDS meter showed that in the initial water in different samples the concentration of dissolved substances reached a total of 180 to 220 mg / l. In the prepared water, this concentration decreased to 20-25 mg / l, with the norm - not more than 50 mg / l, which shows a decrease in total mineralization.