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| RESEARCH, DESIGN, CALCULATIONS | |
| Lapin E. S., Levtsev A. P., Sergushina E. S., Panfilov S. A., Kabanov O. V., Kashurkin A. Y., Usikov S. M. Energy efficiency of heating systems: challenges and modern solutions | 4 |
| Popov I.N., Sivitskiy D.V. Assessment of the factors influencing the radius of effective energy supply in the local energy system | 10 |
| Djumabayeva Z.Z., Turdiboyev A.A., Berdishev A.S. Synergistic effect of combined ultraviolet and ultrasound treatment for groundwater disinfection: experimental and modeling study | 18 |
| Tserkovny A.E., Masenko A.V., Shepilov P.R., Rozhkov S.M. Experimental study of the time characteristics of a single-phase half-wave transformer–rectifier unit | 24 |
| ENERGY SAVING TECHNOLOGIES | |
| Stoyakin G.M., Dmitrenko A.V., Kostin A.V. Analysis of the possibility of using heat recovery of removed air in natural ventilation systems of residential buildings | 28 |
| Yatsynin P.V., Dekin K.A., Berezovets I.O., Ponenko D.A., Meshchanin V.N. A backup diesel generator as part of an autonomous hybrid power plant with renewable energy sources. features of the choice of operating modes | 33 |
| WATER TREATMENT AND WATER PURIFICATION | |
| Mahmudov I.M., Mamirov U.F., Nurov S.S. Analysis of influencing factors and development of a control system based on fuzzy logic in wastewater aeration processes | 38 |
| Filimonova A.A., Cherkasov A.S., Akhmetzyanova A.T. Overview of the possibility of using electrodialysis technology to solve various problems in the field of industry and science | 46 |
| Bortkevich O. A. Simplified calculation of the minimum shoulder extension of the l-shaped pipeline | 55 |
| Kiani G.S.E., Zlobin V.G., Kalinichev A.E. Experimental study of water demineralization using a reverse osmosis system | 60 |
| Driker B.N., Musikhin E.K. Study of phosphonobutanetricarboxylic acid as a scale inhibitor | 65 |
| NEWS, PROBLEMS, OPINIONS | |
| Grigorash O.V., Abramyan A.V., Gaivoronsky I.V., Shapovalov D.A. Universal modular electric power converters uninterruptible power supply systems | 70 |
