CS266133B1 - A method of preparing biologically pure water - Google Patents

Abstract

A method of preparing biologically pure water from water containing inorganic salts, for example by distillation, demineralization, etc., by the action of peracetic acid and by removing residues on an ion exchanger. The water obtained is microbially harmless and has other parameters for use in microbiology, chemistry, food industry, agriculture, healthcare and other sectors.

Description

The invention relates to a process for the preparation of biologically pure water. Currently, biologically pure water is obtained by repeated distillation or a combined ion exchange demineralization and distillation processor. I provide these ways! water for rapid use, or require its perfect storage, usually at higher temperatures, in order to prevent the multiplication of microorganisms. The processes are energy intensive and it is difficult to obtain larger amounts of water. Other methods make it possible to obtain pyrogen-free water, but the equipment for this is complex, costly and technically demanding and difficult to obtain. Water in a wide variety of areas must meet, among other requirements, a number of microorganisms, for example as a raw material for pharmaceutical preparations, water for washing culture glass, equipment and the like.

These shortcomings are eliminated by the proposed method, the essence of which consists in the fact that the water is freed from inorganic substances, for example by distillation, deionization, demineralization and the like. is filled into a mixing vessel, peracetic acid is added in an amount of 0.01% to 0.3% by weight, and stirred for 15 to 30 minutes. During mixing, microorganisms and organic substances are eliminated. The water is then fed to an ion exchange column with a strong basic anion exchange resin and the peracetic acid residues are removed.

The process according to the invention makes it possible to produce water of the desired purity and with practically zero number of microorganisms. Biologically clean water is obtained quickly and in a short time, the operation is simple with a significant possibility of automation, with the possibility of doubling the equipment at the request of continuous operation. Processes at higher temperatures are eliminated, thus increasing work safety and reducing energy consumption. The obtained water can be stored for a longer period of time without the risk of multiplication of microorganisms.

The process according to the invention is carried out as follows. The mixing vessel is filled with demi water with an average conductivity of 1 micro S / cm, with a total content of microorganisms MPA (total number of mesophilic and psychrophilic germs) 1,550, SA (fungi) 50, Kv (yeast) 0. Concentrated acid is added with stirring peracetic 38% in such an amount that the final concentration is 0.01% to 0.3% by weight, with an optimum of 0.1% by weight, and stirred for 15 to 30 minutes. The water is then gradually fed to an ion exchange column and, after flowing, accumulates in a vessel where it is ready for use. The treated water has a conductivity of 0.8 micro S / cm. total number of microorganisms MPa 0, SA 0, Kv 0. Content of organic substances corresponding to oxygen consumption 0.18 mg / l. The content of residual peracetic acid and acetic acid according to PNY 8-001 / 65 of the peracetic acid manufacturers was zero. The process according to the invention can be used wherever biologically pure water is required, for example in microbiology for washing glass and utensils, in chemistry, food industry, agriculture, healthcare, pharmacy and the like. ,

The following example illustrates but does not limit the invention.

Example 1

Place 2,000 ml of demineralized water in a glass vessel, add 2 ml of peracetic acid and stir for 30 minutes. The prepared ion exchange column consists of a glass tube with a diameter of 4 cm and a length of 50 cm. The column is filled with approx. 250 ml of Wofalit SBK annex. Exposed water is introduced into the column at a flow rate of 1000 ml per hour. The treated water has a specific conductivity of 0.8 micro S / cm. The total number of microorganisms MPA, fungi and qualities is zero. The amount of organic matter expressed by oxygen consumption is 0.18 mg / l. The content of peracetic acid and acetic acid is zero.

Claims (1)

Process for the preparation of biologically pure water from water deprived of inorganic salts, characterized in that it is deprived of water at a concentration of 36% by adding peracetic acid to the water in an amount of 0.01% to 0.3% by weight, preferably 0.1% by weight, and the mixture is stirred for 15 to 30 minutes, then the water is passed through an anion exchanger and collected.