The Inverter for autonomous power supply systems

The optimization of the design parameters of the sorption loading of the filter is considered based on a mathematical regression model and laboratory experimental data.

Introduction. The problem of pollution of rivers and lakes by wastewater is a complex and multifaceted object of scientific analysis. Wastewater is the source of a variety of anthropogenic impacts on aquatic ecosystems that lead to deterioration of water quality, loss of biodiversity, threats to human health and loss of economic value of water resources. To minimize the negative consequences of wastewater pollution, it is necessary to develop and implement effective technologies for the treatment and reuse of wastewater, as well as to improve management and control systems for their volume and quality.

Object. The object of the study is wastewater contaminated with heavy metals.

Materials and methods. Factors were identified to optimize the design parameters of the sorption load. Based on algorithmic, theoretical and laboratory studies, data were obtained for the regression equation using the Reichschaffner method. Also, a chemical analysis of the test water was carried out in laboratory conditions, where a concentration was determined that exceeded sanitary standards for total iron and copper. An experiment was carried out using the settling method at various time intervals to determine the dynamics of a decrease or increase in the concentration of the studied chemical elements.

Results and conclusions. Based on the results of solving the regression equation, data were obtained in laboratory conditions with the help of which the coefficients B0, Bi, Bij and Bii were calculated. To check the accuracy of the obtained coefficients using the Student method, we re-calculated the regression model in which these equations were obtained in encrypted form, the accuracy of the resulting models was checked using the Fisher criterion, which is not a random factor. When conducting an experiment in laboratory conditions by settling zeolite in fractions from 0.4 cm to 0.75 cm in time intervals from 1 hour to 4 hours, the best result was a time interval of 4 hours, which showed a decrease in the concentration of total iron and copper by 71%, which corresponds to mathematical calculations and proves the purity of the experiment.

1. Raouf M. E. A., Maysour N. E., Farag R. K., et al. Wastewater Treatment Methodologies, Review Arcle. Int J Environ & Agri Sci. 2019. No 3. P. 018.

2. Matsak A., Tsytlishvili K. Using different filter media of stormwater treatment performance. Norwegian Journal of development of the International Science. 2018. V. 1 (20). Pp. 19-22.

3. Rybalova O., Artemiev S., Sarapina M., Tsymbal B., Bakhareva A., Shestopalov O., Filenko O. Development of methods for estimating the environmental risk of degradation of the surface water state. Eastern-European Journal of Enterprise Technologies. 2018. V. 2 (10-92). Pp. 4-17.

4. Fedotova Y. V., Spitsyn A. A. Wastewater treatment of forest chemical production Eurasian Union of Scientists. 2019. № 12-5 (69). Pp. 46-51.

5. Bocharnikov V. S., Kozinskaya O. V., Denisova M. A., Bocharnikova O. V. Study of loading deposition modes with the help of hydraulic installation. Proceedings of Nizhnevolzskiy agrouniversity complex: science and higher vocational education. 2020. № 1 (57). Pp. 260-267.

6. Hajiyeva S. R., Shamilov N. T., Bayramov G. I., Rakida N. M. Еcological effective treatment of industrial wastewater formed in the oil-producing industry by coagulation method. Azerbaijan Chemical Journal. 2021. № 3. Pp. 63-66.

7. Kazeminejadfard F., Hojjati M. R. Preparation of superabsorbent composite based on acrylic acidhydroxypropyldistarch phosphate and clinoptilolite for agricultural applications. Applied Polymer Science 2019. No 136 (16). 4736.

8. Gebeyhu Birara, Hatiye Samuel, Finsa Mekuanent. Assessment of Irrigation Water Management Performance Indicators and Mitigation Measure in Arba Minch Irrigation Scheme, Ethiopia. Advances in Agriculture. 2024. 10.1155/2024/5596514.

9. Ovchinnikov A. S., Bocharnikov V. S. New technical solutions to increase the efficiency of resource-saving methods of irrigation. Proceedings of Nizhnevolzskiy agrouniversity complex: science and higher vocational education. 2012. № 1 (25). Pp. 119-124.

10. Borisenko I. B., Ovchinnikov A. S., Meznikova M. V., Fomin S. D., Bocharnikov V. S., Rogachev A. F., Ulybina E. I. Resource-saving method of chemical treatment of tilled crops. IOP Conference Series: Earth and Environmental Science. The proceedings of the conference AgroCON-2019. 2019. P. 012092.

11. Ovchinnikov A. S., Bocharnikova O. V., Bocharnikov V. S., Pantyushina T. V. Features of sweet pepper cultivation technology under drip irrigation in the conditions of the Lower Volga region. Proceedings of Nizhnevolzskiy agrouniversity complex: science and higher vocational education. 2010. № 3 (19). Pp. 18-22.

12. Fadeev A. B., Kruchinina N. E., Zaitseva A. D. Wastewater treatment from complex copper compounds. Advances in Chemistry and Chemical Technology. 2019. V. 33. № 5 (215). Pp. 93-95.

13. Kochetov G., Prikhna T., Kovalchuk O., Samchenko D. Research of the treatment of depleted nickel-plating electrolytes by the ferritization method Eastern-European J. of Enterprise Technologies. 2018. No 3. Pp. 52–60.

14. Malyuba A. D., Zeitoun A., Edrees, Wafa M. Competitive Adsorption of Quaternary Metal Ions, Ni2+, Mn2+, Cr6+, and Cd2+, on Acid-Treated Activated Carbon. Water. 2023. No 15. 1070.

15. Mahendra Sh., Tibor H. Electrochemical Detection of Heavy Metal Ions Based on Nanocomposite Materials. Journal of Composites Science. 2023. No 7. P. 473.

16. Roshni K., Sivaiah B., Mohanta, Jhilirani, Qaiyum Md. Dey, Banashree, Samal, Priyanka, Dutta, Soumen D. Dye sequestration from aqueous phase using natural and synthetic adsorbents in batch mode: Present Status and Future Perspectives. International journal of Environmental Science and Technology. 2023.

17. Khan Shahnoor, Imteaz Monzur. Column Experiments on Arsenic Removal Through Adsorption From Water Using Different Natural and Synthetic Adsorbents. 2021.

18. Huiping Z., Zhai, Longxue, Zhang Jn, Li D. As(V) adsorption by a novel core-shell magnetic nanoparticles prepared with Iron-containing water treatment residuals. Science of The Total Environment. 2020. V. 753. 142002.