Alkalization technology and its application to obtain high-performance concrete compositions is an urgent scientific problem that opens opportunities for improving building structures. The article is devoted to the new technology of manufacturing reinforced concrete structures with low energy consumption, resource, and labor intensity based on the improved variatropic configuration of vibro-centrifuged concrete using activated water with high pH. The synergistic effect of the joint use of the proposed novel solutions has been theoretically and experimentally proved. Thus, growth in physical and mechanical characteristics of up to 15–20% was obtained, the structure and its operational ability were improved (the effectiveness of structural improvement, expressed as a percentage, reached values over 70%, concerning control samples). A positive effect on the properties of vibro-centrifuged concrete over the entire thickness of the annular section has been revealed. A method for controlling the integral characteristics of concrete has been obtained. The possibility of regulating the variatropic structure and controlling the differential characteristics of vibro-centrifuged concrete has been established. An assessment of the constructive quality and variatropic efficiency of vibro-centrifuged concrete was carried out, and new calculated dependencies were proposed, expressed in the form of relative coefficients.

Abstract. Corrosion damages of metal structures of wastewater treatment facilities affect the work process parameters and operation safety. The analysis of the factors causing corrosion of metal elements and the assessment of corrosion resistance of the steel grades St08ps, St3sp and St5sp during the treatment stages, including the chlorine treatment, were conducted based on the data obtained from the Rostov-on-Don aeration plant. The article search techniques to determine the corrosiveness of water towards the metal structures. It is established that in this case it is advantageous to use redox indicator systems (rH2), which is calculated on the basis of field measurements of redox potential (ORP) of water. Based on the conducted studies, the correlation dependence for determining the corrosion rate of the steel grades St08ps and St5sp was suggested and statistically assessed for the aeration plant structures.

The paper presents a study of quality of natural waters and water in a centralized water supply system during the period of an increase in the “Smell” indicator in the spring of 2021. The chemical and physical properties of water, the results of quality and quantity of studying the variety I phytoplankton in the most difficult period of deterioration in quality of river water. Low water and exceeding MPC concentrations of organic substances in river water. The Don River causes altered form odorant substance as evidenced by the results of determination in water 1,2,3- t rihlorbenzol and geosmin, hexachloroethane and aniline shown in operation. Barrier function of reagent treatment methods used at water treatment plants in the lower reaches of the river. The Don River, even when combined with carbonated water, is deficient in odor-producing substances.

Based on the results of the analysis of current scientific research in the field of water supply systems of buildings, existing methods for determining the parameters of the applied schemes, as well as design methods, a number of areas have been identified, the study of which would make it possible to determine the optimal scheme of the water supply system at a minimum cost for construction and operation. In addition, optimization must consider the latest requirements on reliability and environmental safety for engineering life support systems of buildings and structures. Creating a clear algorithm based not only on theoretical (calculated) data, but also on the operating experience of existing buildings, equipment, and experimental data will simplify the process of designing new and reconstructing existing systems, provide the end user with water in an appropriate amount, and operate in an uninterrupted mode, without prejudice to the environment and people.

Д. А. БУТКО кандидат технических наук, доцент кафедры водоснабжения и водоотведения, декан факультета инженерно-экологических систем Ростовский государственный строительный университет В.А. ЛЫСОВ кандидат технических наук, профессор, заведующий кафедрой водоснабжения и водоотведения Ростовский государственной строительный университет А.Б. РОДИОНОВА ассистент кафедры водоснабжения и водоотведения Ростовский государственный строительный университет ПРИМЕНЕНИЕ КОАГУЛЯНТОВ ДЛЯ ОБРАБОТКИ ПРОМЫВНЫХ ВОД СКОРЫХ ФИЛЬТРОВ USE OF COAGULANTS FOR THE TREATMENT OF WASH WATER HIGH-RATE TRICKLING FILTERS Предложена классификация безреагентных и реагентных систем повторного использования промывных вод скорых фильтров. Установлены оптимальные дозы исследованных коагулянтов при одинаковых значениях критерия Кэмпа.