UDC 628.336.4
DOI 10.35776/VST.2024.09.07

Kichigin V. I., Iudin Aleksandr

Study of the technology of chemical dewatering of thickened
excess activated sludge using experimental-statistical models

Summary

The technology of chemical dewatering of thickened excess activated sludge by processing wastewater sludge with six types of coagulant and polyacrylamide in doses from 0 to 300 mg/dm³ was studied. The the effect of each chemical on the degree of sludge dewatering was determined. Mathematical models of the sludge specific resistance changing dependence on the amount of coagulant and flocculant added into the sludge were obtained. The mathematical models are presented both in implicit and explicit (isolines) form. It was proven that the process of maximum reduction of the specific resistance of thickened excess activated sludge is more efficient with coagulants: «Aqua-Aurat™-30», aluminum polyoxysulfate or «GranPAKS™» in doses up to 25 mg/dm³ and flocculant PAA in doses of 175–200 mg/dm³.

Key words

sludge specific resistance , mathematical and graphical models of the sludge water yielding capacity , optimal dose of chemicals , thickened excess activated sludge

For citation: Kichigin V. I., Iudin A. A. Study of the technology of chemical dewatering of thickened excess activated sludge using experimental-statistical models. Vodosnabzhenie i Sanitarnaia Tekhnika, 2024, no. 9, pp. 43–51. DOI: 10.35776/VST.2024.09.07.
(In Russian).

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REFERENCES

1. Гвоздев В. Д., Ксенофонтов Б. С. Очистка производственных сточных вод и утилизация осадков. – М.: Химия, 1988. 112 с.
   Gvozdev V. D., Ksenofontov B. S. Ochistka proizvodstvennykh stochnykh vod i utilizatsiia osadkov [Industrial wastewater treatment and sludge utilization. Moscow, Khimiia Publ.,1988, 112 p.].
2. Кичигин В. И., Палагин Е. Д. Обработка и утилизация осадков природных и сточных вод: учебное пособие. – Самара, Самарский государственный архитектурно-строительный университет, 2008. 204 с.
   Kichigin V. I., Palagin E. D. Obrabotka i utilizatsiia osadkov prirodnykh i stochnykh vod [Processing and utilization of water and wastewater sludge: a study guide. Samara, Samara State University of Architecture and Civil Engineering Publ., 2008, 204 p.].
3. Туровский И. С. Обработка осадков сточных вод. – М.: Стройиздат, 1988. 256 с.
   Turovskii I. S. Obrabotka osadkov stochnykh vod [Wastewater sludge treatment. Moscow, Stroiizdat Publ., 1988, 256 p.].
4. Васильев Б. В., Морозов С. В., Пробирский М. Д. Флокулянты для обезвоживания осадков сточных вод на станциях аэрации Санкт-Петербурга // Водоснабжение и санитарная техника. 2001. № 4. С. 13-16.
   Vasil’ev B. V., Morozov S. V., Probirskii M. D. [Flocculants for wastewater sludge dewatering at the St.-Petersburg wastewater treatment facilities]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2001, no. 4, pp. 13–16. (In Russian).
5. Кичигин В. И., Юдин А. А. Экспериментально-статистические модели влагоотдачи обработанного реагентами уплотненного избыточного активного ила // Водоснабжение и санитарная техника. 2023. № 11. С. 55–60. DOI: 10.35776/VST.2023.11.08.
   Kichigin V. I., Iudin A. A. [Experimental and statistical models of the water yielding capacity of thickened excess activated sludge treated with chemicals]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2023, no. 11, pp. 55–60. DOI: 10.35776/VST.2023.11.08. (In Russian).
6. Бондарь А. Г., Статюха Г. А. Планирование эксперимента в химической технологии (основные положения, примеры и задачи). – Киев: Вища школа, 1976. 183 с.
   Bondar’ A. G., Statiukha G. A. Planirovanie eksperimenta v khimicheskoi tekhnologii (osnovnye polozheniia, primery i zadachi) [Planning an experiment in Chemical Technology (fundamentals, examples and tasks). Kiev, Vishcha Shkola, 1976, 183 p.].
7. Саутин С. А. Планирование эксперимента в химии и химической технологии. – Л.: Химия, 1975. 48 с.
   Sautin S. A. Planirovanie eksperimenta v khimii i khimicheskoi tekhnologii [Planning an experiment in Chemistry and Chemical Technology. Leningrad, Khimiia Publ., 1975, 48 p.].
8. Кичигин В. И. Моделирование процессов очистки воды: учебное пособие. – М.: Издательство АСВ, 2003. 203 с.
   Kichigin V. I. Modelirovanie protsessov ochistki vody [Simulation of water treatment processes: a study guide. Moscow, ASV Publ., 2003, 203 p.].