Milk and dairy products occupy one of the leading positions in the diet of most population groups. These products are rich in vitamins, minerals and essential amino acids, which are necessary for normal functioning of the body. In order to establish the list of the most consumed by the population of the Republic of Belarus dairy products, research of consumer preferences regarding this group of products were conducted. To obtain reasonable data on the chemical composition and nutritional value of milk and dairy products most consumed by the population of the republic, an analysis of literature sources on paper and electronic media, report data and technological documentation, as well as laboratory studies of the microelement and vitamin composition of milk and dairy products in the country's market was made. The comparative analysis of the obtained data on the microelement composition of common dairy products with the data on tables of the chemical composition and caloric content of food products of the Russian Federation and the United Kingdom found that the discrepancy between the values of the micronutrient content in some dairy products represented on the market of the Republic of Belarus in average is: Ca ±Δ 27.6 %; 19.1 %; Mg ±Δ 18.6 %; 0.12 %; P ±Δ 15.2 %; 10.4 %; Fe ±Δ 62.8 %; 66.3 %, vitamin B₂ ±Δ 48.1 % and 21.5 % respectively.

Results of research on determination of protein and fatty structure and balance of raw materials containing collagen - content of protein, fat, irreplaceable amino acids and polyunsaturated fatty acids (PUFAs) (linoleic, linolenic, arakhidonovy), ratios protein:fat, ω6/ω3 fatty acids, the sums of polyunsaturated fatty acids, monounsaturated fatty acids (MUFAs), the saturated fatty acids (SFA) and also amino-acid scores on all irreplaceable amino acids are presented in article. It is established that raw materials containing collagen are characterized by the high content of protein (10.5-38.7 %), especially the pork skin and ears (29.4 % and 21.0 % respectively), beef sinews, ears and lips (38.7 %, 25.2 % and 23.1 % respectively), bird stomach and crest (21.0 % and 19.8 % respectively) and exceed beef and meat of broilers on this indicator for 1.1-20.0 %, and pork - for 5.5-24.4 % and also the ratio which is brought closer to optimum protein:fat (an udder and ears pork), amino-acid (a pork skin, an udder, beef lips, a beef trachea, pork hog middle, manifold, a beef hem, lungs, a spleen) and fatty acid structure (a pork skin and ears, beef lips, a hem, lungs) that allows to consider these raw materials as an additional source of white, irreplaceable amino acids and polyunsaturated fatty acids in the meat-processing industry.

In the article results of researches on definition of preferences of inhabitants of Minsk in the market of milk of drinking water are stated. The preferences of respondents regarding consumption, frequency of purchase, temperature processing, trade mark, volume and criteria for choosing drinking milk are shown. The necessity of studying the market of drinking milk has been identified, the value of the product in the population nutrition has been substantiated. Milk is a product of everyday demand, a significant proportion of respondents prefer pasteurized milk to other types of milk temperature treatment, an important value for consumers is the brand, the type of packaging, the volume of the product purchased. The increased attention of the respondents to the information component of the goods is noted. It was found out that respondents in the majority are conservative at a choice of a product, the main factor at a choice of milk of drinking for respondents of Minsk is its utility. The situation associated with the individual intolerance of milk by consumers, low-lactose and lactose-free dairy products produced by the industry of the Republic of Belarus, and the inadequate presence of such goods of the trade network are considered. Also, respondents are not widely informed about the lactose-free form of milk, advertising activities are not sufficiently conducted. In the course of research, it was established that trade enterprises begin to build segmentation not only by product, but also by consumer; simplify the layout based on the purpose of the purchase; try to stimulate impulse acquisitions of milk; narrow assortment in small shops to running positions.

At present, the world community pays special attention to the problem of improving the quality of nutrition of the population and, first and foremost, the children's community. The UN Declaration adopted at the Second International Conference on Nutrition clearly identifies the consequences of malnutrition in children: stunting and development, exhaustion, overweight and obesity. Among the most significant ways of solution, the Food and Agriculture Organization of the United Nations identifies: preempting all forms of malnutrition and malnutrition; providing consumers with reliable and accessible information that allows making rational food choices; fencing consumers and, especially children, from unscrupulous marketing and food advertising. In the Republic of Belarus, the problem of effective production of baby food is given considerable attention by the state. Production of this category is developing dynamically. At the same time, the domestic market share of domestic products is about 70 %. The article presents a comparative analysis of the assortment of baby food products of domestic and foreign production available on the market of the Republic of Belarus. Consumer preferences for this product category have been studied, and recommendations have been given to domestic producers to increase the competitiveness of their products in the domestic and foreign markets

The research of quality indicators is conducted, nutritional value and vitamin-mineral composition of new types of food concentrates for functional purposes: dry breakfasts, soups and instant cereals, instant drinks (kissels and cocoa drinks) enriched with linseed fiber have been studied. An organoleptic evaluation of new types of fortified food concentrates was carried out. The results of the tasting assessment were graphically drawn using the profile flavor analysis method. As a result of the physicochemical analysis of new enriched products, a significant protein content was detected (up to 26 % of the physiological requirement per day for the adult population and up to 30 % for the children of school and preschool age); fiber (up to 20 % of the average daily requirement), a low amount of fat, which allows these products to be classified as a healthy food. Studies of the fatty acid composition of samples of new products have been carried out. It is established that new types of products have a rich fatty acid composition. All products contain more than 0.3 g of omega-3 PUFA in 100 g of food concentrate. The presence of this amount of omega-3 PUFAs suggests that all developed food concentrates are a source of omega-3 fatty acids. Studies of the vitamin composition of new types of fortified food concentrates contain a significant amount of B vitamins have been carried out.

Mercury is one of the most dangerous and high toxic element which has ability to accumulate in plants, animal and human body. Fish and sea products in different degree are capable to accumulate mercury compounds. The content of mercury and harmful substances depends on the specie, size and lifetime. There are presented the results of research of the total content of mercury in fish samples according to species, as well as the non-fishery objects presented for tests in 2016. After the results analysis all the samples were divided into 3 groups. The level of accumulation of mercury in sea and river fish was determined. The research allowed identifying fish species potentially unsafe due to high level of mercury content. The control of mercury content was carried out by the method of cold vapor atomic absorption spectrometry with preliminary mineralization of the sample under pressure.

In work there is presented the original method of obtaining biologically valuable honey product, which has a balanced carbohydrate-protein-vitamin-mineral composition, good organoleptic properties, as well as the ability to absorb and remove heavy metals and radionuclides, and it is possible to select enriched ingredients and thereby perform fine regulation of the composition, organoleptic characteristics and other manifested properties. Photomicrographs were obtained on a scanning electron microscope to evaluate the morphological structure.

The development and introduction of modern high-performance and efficient devices for the disinfection of liquids, in particular drinking water, in the food industry is an actual line of scientific research. At present, active research is being carried out all over the world on the properties of hydrodynamic heaters and their application in various fields of activity. The article presents the developed pilot plant which includes a rotary heater which operation principle is based on the conversion of mechanical energy supplied to the rotor into the energy of the vortex motion of the liquid. The device and the operating principle of the pilot plant are described. A methodology has been developed for carrying out studies to determine the effect of the structural and technological parameters of the rotary heater on the water heating temperature. The results of experimental studies on the effect of the structural and technological parameters of the rotary heater on the water heating temperature are shown.

In the processes of processing and production of products, a person deals with materials of various aggregate states - liquids, gases, solid and bulk substances. The design of processes of technological processing is based on the mutual influence of the properties of materials and the design of equipment that implements the goal of technological transformation. For the listed materials, traditional methods of calculating the design and technological parameters of plants are used in practice. However, characterizing the category of "bulk material", it is often understood that this is an array of particles possessing the same nature. Examples of materials of this type can be: grain cereals and their processed products, starch, sugar, salt, etc. The field of application of such products is agriculture, food industry, etc. Processes where the processing object is bulk materials or their mixtures (compositions containing two or more components in a certain ratio) can be named: transportation, dosing, mixing, pressing, heat and mass transfer, and many others used in human activity. The article presents the main parameters and the fractional composition of bulk materials used in food industrial processing and food production.

Whey processing is a key direction in the development of the dairy industry. Demand for whey ingredient applications continues to grow, attracting more and more organizations to the methods of obtaining them. One of the modern ways of processing is electrodialysis. The market of products, the production of which provides the main volumes of whey, is analyzed. The potential of the electrodialysis equipment market and the replacement membrane market is investigated in accordance with the amount of unprocessed whey. The main directions of the development of the Belarusian dairy industry are formulated; measures to improve the indicators of the volumes of sales of electrodialysis units are identified.