Investigation of the technology for treating excess activated sludge from pathogenic contamination
Keywords:
excess activated sludge, wastewater treatment, pathogenic contamination, sludge stabilization, anaerobic digestionAbstract
This article investigates the technological approaches used for the treatment of excess activated sludge in order to reduce its pathogenic contamination. Excess activated sludge is one of the main by-products of wastewater treatment plants and may contain pathogenic microorganisms, including bacteria, viruses, protozoa and helminth eggs. If such sludge is not properly treated, it can become a serious source of sanitary, environmental and epidemiological risk. Therefore, the development and improvement of sludge treatment technologies is an important task for modern wastewater management. The article analyzes the main methods of reducing pathogenic contamination in excess activated sludge, including anaerobic digestion, aerobic stabilization, lime treatment, thermal processing, composting and advanced disinfection methods. Special attention is given to the effectiveness, practical applicability and environmental safety of these technologies. The results show that the most effective approach is the combination of stabilization, disinfection and dewatering processes, which allows the sludge to be safely disposed of or reused in agriculture and land reclamation.
References
[1] V. Arthurson, “Proper Sanitization of Sewage Sludge: A Critical Issue for a Sustainable Society,” Applied and Environmental Microbiology, 2008.
[2] G. Bitton, Wastewater Microbiology. Hoboken, NJ: Wiley-Blackwell, 2011.
[3] N. J. Horan, Biological Wastewater Treatment Systems: Theory and Operation. Chichester: Wiley, 2003.
[4] Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery. New York: McGraw-Hill Education, 2014.
[5] G. Tchobanoglous, F. L. Burton, and H. D. Stensel, Wastewater Engineering: Treatment and Reuse. New York: McGraw-Hill, 2003.
[6] F. R. Spellman, Handbook of Water and Wastewater Treatment Plant Operations. Boca Raton, FL: CRC Press, 2013.
[7] P. A. Vesilind, Wastewater Treatment Plant Design. London: IWA Publishing, 2003.
[8] I. Ismoilov, “Iskandar oynasi,” Oltin Bitiglar–Golden Scripts, vol. 4, no. 4, 2019.
[9] I. Ismoilov, “The image of ‘The Mirror of Iskandar’ in the poetry of Alisher Navai and its comparative analysis,” unpublished article.
[10] I. Ismoilov, “About the Talismans of Iskandar (Alexander) by Alisher Navoi,” International Journal of Linguistics, Literature and Culture, vol. 7, no. 3, pp. 139–145, May 2021, doi: 10.21744/ijllc.v7n3.1488.
[11] I. Ismoilov, “‘Boburnoma’ as a Literary Source,” American Journal of Social Sciences and Humanity Research, vol. 5, no. 11, pp. 128–130, 2025, doi: 10.37547/ajsshr/Volume05Issue11-32.
[12] Q. S. Makhmudov, “Forms of Quick Management of Manufacturing in the Conditions of Market Relations,” 2023.
[13] K. Makhmudov, “Key Concepts Regarding the Quality of Services and Its Management,” 2023.
[14] K. Makhmudov, “The Need to Introduce Quality Systems in the Field of Services,” European Journal of Business Startups and Open Society, vol. 2, no. 7, pp. 11–14.
[15] A. A. Azizkulov and S. M. Ruzimurodov, “Gazali on the significance of intellect in human activity,” Paradigmata Poznani, no. 2, pp. 43–46, 2014.
