RU2247079C2 - Method for production of enrichment drinking water - Google Patents

Abstract

FIELD: water-supply, food industry, drinking water preparation, in particular enrichment the same with mineral additives.

SUBSTANCE: claimed method includes production of calcium-containing additive by mixing of milled biogenic calcium-containing material with citric or ascorbic acid in mass ratio of 1:0.8 and 1:1.25, respectively, and introducing the same in water volume followed by dissolution up to desired calcium concentration. As biogenic calcium-containing material power calcite-containing writing chalk in form of micellate, milled up to particle size of 10^-7 m is used. Calcium-containing additive preferably is preliminary dissolved in smaller volume of enriching water with subsequent addition into larger volume of the same. Obtained weak-basic structured water with acceptable taste is physiologically full-value drinking water, enriched with biologically accessible calcium.

EFFECT: drinking water enriched with calcium in biologically accessible form, obtained by using of inexpensive and accessible calcium-containing material.

2 cl, 8 ex

Description

The invention relates to the field of preparation of drinking water, in particular its enrichment with mineral additives, and can be used in water supply, food industry and other fields to produce high-quality drinking water enriched with calcium in biologically assimilable form.

Calcium is one of the most essential elements necessary for the functioning of the vital systems of the human body and animals. It participates in the processes of bone tissue formation, transmission of nerve impulses, regulation of blood pressure, etc. Calcium deficiency in the body caused by insufficient intake of food and water leads to numerous disorders of various body systems.

In this regard, in 1996, the technical specifications TU 9199-001-27418087-6 were introduced, regulating the calcium content in water, which led to the emergence of methods for producing drinking water with a given calcium content.

Currently, a number of methods for remineralization of treated water are known, which provide for the enhancement of physiological usefulness and improvement of taste properties of drinking water enrichment with calcium and other elements. [Classification of water treatment methods. Ecological Bulletin of Russia, 9/2002].

Thus, a known method of producing drinking water from a distillate, which consists in the fact that the reaction between calcium hydroxide and carbon dioxide is carried out in an ejector. To do this, 20-25% of the initial volume of the distillate through a bypass pipe is sent to the ejector, which serves calcium hydroxide and carbon dioxide. The resulting solution of calcium bicarbonate is mixed with the main stream of distillate to obtain conditioned water of the hydrocarbonate class (AC. SU 1507742, BI No. 34, 09/15/89).

The method allows to significantly reduce the cost of electricity and to reduce by ten times the residence time of the treated distillate in the installation.

The disadvantage of this method is the use of inorganic raw materials and the production of calcium in a form difficult to access for the human body.

A known method of enriching distilled water by filtering a distillate saturated with carbon dioxide through a layer of granular calcium carbonate (for example, limestone). In this case, the binding of aggressive dioxide and enrichment of the distillate with corrosion inhibiting calcium bicarbonate CaCO ₃ + CO ₂ + H ₂ = Ca (HCO ₃ ) ₂ takes place.

The method is characterized by simplicity, reliability and the ability to self-regulation, which is especially important in the production environment.

The disadvantage of this method is the low bioavailability of calcium from enriched water.

Improving the quality of water, simplifying the method, and also ensuring waste-free technology is achieved by simultaneously introducing a solution of carbon dioxide and finely dispersed calcium-containing material taken in quantities of 62-165 and 700-1300 mg / l, respectively, into thermally desalinated water in a mixing device. Subsequent filtration of the mixture is carried out for at least 6 minutes at a speed of up to 30 m / h through a calcium-carbonate-containing charge until it is clogged, then stabilized and neutralized with ozone through an activated carbon deposit layer [AS. SU No. 1412232, B 434, 09.15.90].

The obtained enriched water, as well as the previous analogues, contains calcium in a biologically inaccessible form, and the method is notable for the complexity of technological design.

Improving the bioavailability and improving the quality of water is achieved in the well-known household method of enrichment of drinking water, selected as a prototype, according to which a calcium-containing additive is obtained by mixing finely divided ground natural biogenic calcium-containing material with either citric or ascorbic acids. As a natural biogenic calcium-containing material, coral calcium is used, which consists of 90% calcium carbonate, which in the presence of the corresponding acid in an aqueous medium forms biologically assimilable calcium compounds, for example calcium citrate.

The disadvantages of the method are the high cost of raw materials - 30 one-gram sachets cost about a thousand rubles, its scarcity and individuality of application [I. Filipova. Calcium is an ion of health. Publishing House “Ves”, St. Petersburg, 2001, p. 37-40].

The objective of the invention is the expansion of a number of methods for the enrichment of drinking water with bioavailable calcium using cheap and affordable biogenic calcium-containing material.

Technical results that can be achieved by implementing the method are:

- improving the manufacturability of the method;

- availability of raw materials;

- reduction in the cost of enriched water;

- providing the possibility of industrial implementation of the method.

The solution of this problem and the achievement of the above results became possible due to the fact that in the known method for producing enriched water, which includes obtaining a calcium-containing additive by mixing crushed biogenic calcium-containing material with citric or ascorbic acids and adding it to the volume of water, followed by dissolution to a predetermined concentration of calcium, in as the calcium-containing nutrient material is in the form mitsellata, crushed to a particle size of 10 ^-7 m chalk (writer's) including yuschy calcite powder and mixing it or with citric or ascorbic acids is carried out in a weight ratio of 1: 0.8 or 1: 1.25 respectively.

In a particular embodiment, the calcium-containing additive is previously dissolved in a smaller part of the enriched water, and the resulting solution is introduced into a large part of the volume of enriched water.

The introduction of the essential features of the proposed method of the operation of using chalk (writing) as a biogenic calcium-containing material is due to the specific nature of the formation of this mineral in nature.

Chalk (writing) as a rock is a transitional variety from organic limestones to limestones of chemical origin. This is a white, weakly cemented fine-grained rock consisting of 96-99% of CaCO ₃ . In the carbonate part of the chalk, three groups of components are distinguished:

- organic residues (plant and animal);

- calcium crystals with good facets;

- powder calcite.

Most of the chalk is composed of organic residues, which allows us to attribute chalk (written) to biogenic materials. Among organic residues, the main role is played by coccominophorids and foraminifers. The content of organic residues in the chalk of various deposits varies from 10 to 75% of the total mass of the rock. One of the most important constituent parts of the chalk is calcite powder, represented by the smallest grains. The content of powdered calcite in chalk is on average close to 30-40% [The course of solid mineral deposits. Edited by P.M. Tatarintsev and A.E. Karyakin. L., "Nedra", 175, p. 502-507].

Powder calcite is identical in chemical composition to the rest of the rock mass, but differs from it in particle sizes that do not exceed 10 ^-7 m and their weak adhesion, which allows this part of the chalk to be converted to a micellar state with minimal energy costs, i.e. respectively, with a lower consumption of citric or ascorbic acid.

The use of chalk (writing) in a micellar state, i.e. a state in which the chalk particles dissolve almost instantly, also increases the processability and reliability of control by calcium concentration.

Due to the large reserves of chalk (chalk) is an affordable and cheap raw material that allows you to carry out the declared enrichment process on an industrial scale.

Existing grinding mills provide the required degree of dispersion. One of the known progressive methods for producing finely dispersed chalk (written) by its deep destruction is destruction using cavitation processes in the resonant mode, which allows chalk particles to additionally acquire uncompensated surface electric charges and translates the degraded chalk into a micellar state.

The method is as follows.

Chalk (written), crushed to a particle size of 10 ^-7 m in the form of micelate, is mixed with citric or ascorbic acid in a ratio of 1: 0.8 and 1: 1.25, respectively. The resulting calcium-containing additive is dissolved in a volume of water to a predetermined calcium content.

In a particular embodiment, the obtained calcium-containing additive is dissolved in a smaller part of the enriched water (about 0.1%), and then, using a dispenser, it is introduced into a larger volume of enriched water. This allows us to simplify the technology and control the calcium content when mixing two liquids, rather than a liquid and a solid phase, which still has to go into another phase state.

The process is monitored by calcium ion using a chemical composition sensor. In enriched water, the calcium content should not exceed 80 mg / l of water. The total amount of additives for conditioning 1 m ^{3 of} enriched water, as a rule, does not exceed 200 g.

The invention does not explicitly follow from world-class technology. From the world level of technology, technical solutions of the same purpose have not been identified, the set of features of which is identical to the essential features of the claimed invention.

The practical applicability of the method is proved by the following examples of specific performance.

Example 1

Chalk (written) is crushed in a cavitation mill to micellate with a particle size of 10 ^-7 m (density 1.6 g / cm ³ ). 200 g of mycelate are mixed with 160 g of citric acid, which corresponds to their ratio of 1: 0.8. The resulting additive is added to 1 m ^{3 of} enriched water (distillate). After mixing, high-quality water was obtained with accepted organoleptic characteristics and a calcium ion content of 80 mg / L.

Example 2

According to example 1, only the obtained additive is initially dissolved in 1 liter of enriched water (without precipitation of a solid precipitate), and then introduced into the remaining volume of enriched water. Get 1 m ³ high-quality water with a calcium ion content of 80 mg / l.

Example 3

According to example 2. As the enriched water take distillate. In a container containing 1 l of distillate, an additive is dissolved containing 200 g of chalk micelate (density 1.6 g / cm ³ ) and 250 g of ascorbic acid, which corresponds to their ratio of 1: 1.25. The resulting concentrate using a dispenser is introduced into the main container, where it is mixed with the main volume of water. Enriched water in an amount of 1 m ³ contains 80 mg / l of calcium ions and has a pleasant taste, does not form a precipitate.

Example 4

In example 2, only the ratio of chalk micellate (writing) and citric acid is 1: 1. Enriched water contains 88 mg / L of calcium ions.

Example 5

In example 2, only the ratio of chalk micellate (writing) and citric acid is 1: 0.5. Enriched water contains calcium ions 68 mg / l.

Example 6

According to example 3, only the ratio of chalk micellate (writing) and ascorbic acid is 1: 1.5. Enriched water contains calcium ions of 90 mg / l.

Example 7

In example 3, only the ratio of chalk micellate (writing) and ascorbic acid is 1: 1. Enriched water contains calcium ions of 70 mg / l.

Example 8

In Example 4, only the mycelate content is 100 g. The enriched water contains 57 mg / L of calcium ions.

As can be seen from the presented examples of the practical implementation of the method, subject to the operations of the proposed method (examples 1-3), the physiological usefulness of calcium-enriched water is achieved. No precipitation. The content of calcium ions is 80 mg / l.

A change in the ratios of micellate of chalk and citric or ascorbic acid in the direction of increasing the amount of acid leads to unproductive costs of reagents, and in the direction of decreasing the amount of acid, to an insufficient content of calcium ions.

Thus, the claimed combination of essential features allows you to expand a number of ways of enriching water with biogenic calcium-containing material, reduce the cost of raw materials in comparison with the prototype, increase the processability, at the same time as calcium is saturated with drinking water, to be fortified and converted into physiologically beneficial for the human body.

Claims (2)

1. A method of enrichment of drinking water, including obtaining a calcium-containing additive by mixing crushed biogenic calcium-containing material with citric or ascorbic acids and adding it to a volume of water, followed by dissolution to a predetermined calcium concentration, characterized in that micellate is used as a biogenic calcium-containing material milled to a particle size of 10 ^-7 m chalk (writer's) comprising calcite powder and mixing it with citric or ascorbic acids is carried out in asses ratio of 1: 0.8 and 1: 1.25 respectively. 2. The method according to claim 1, characterized in that the calcium-containing additive is previously dissolved in a smaller part of the volume of enriched water, and the resulting solution is introduced into a large part of the volume of enriched water.