CONTACT CLARIFIERS IN DRINKING WATER TREATMENT PROCESSES

Authors

  • S. Dushkin National University of Civil Defence of Ukraine

DOI:

https://doi.org/10.33042/2522-1809-2022-3-170-44-52

Keywords:

contact coagulation, contact clarifiers, drinking water, filtration, contact environment, coagulant.

Abstract

The article deals with the issues of resource-saving technology in the preparation of drinking water on contact clarifiers. One of the methods of water purification from coarse and colloidal contaminants is the method of contact coagulation using aluminum sulfate coagulant.

It is advisable to use contact clarifiers in single-stage treatment schemes for low-turbid colored and cloudy-colored waters, when the total content of suspended solids in the water entering the contact clarifiers, including the suspension formed as a result of introducing reagents into the water, does not exceed 150 mg/l. With a higher content of suspended matter in water, the water consumption for washing contact clarifiers increases sharply.

To intensify the preparation of drinking water on contact clarifiers, a resource-saving technology is proposed using contact clarifiers using a modified aluminum sulfate coagulant solution, which makes it possible to: reduce the consumption of coagulants used in water purification, improve the quality of water clarification by weighing substances, and reduce the cost of water treatment.

Theoretical prerequisites for improving the operation of contact clarifiers with a modified coagulant solution are considered. The use of a modified coagulant solution allows, without deteriorating the quality of water clarification, to reduce the calculated doses of the coagulant by an average of 25-30%, which confirms the feasibility of using a modified aluminum sulfate coagulant solution when clarifying water on contact lights.

It has been established that the treatment of clarified water with a modified aluminum sulfate coagulant solution during contact coagulation makes it possible to reduce the residual aluminum content in clarified water by an average of 50-60%, the quality of water purification in terms of bacteriological and hydrobiological indicators is much higher than when treating water with a conventional coagulant solution.

Author Biography

S. Dushkin, National University of Civil Defence of Ukraine

PhD, Associate Professor of the Department

References

Dzhigirei, V.S., Storozhuk, V.M., Yatsyuk, R.A. (2001). Fundamentals of ecology and environmental protection. Lviv, Afisha. [in Ukrainian]

Dushkin, S., Martynov, S., Dushkin, S. (2019). Intensification of the work of contact clarifiers of drinking water preparation. Journal of Water and Land Developer, 41, 55–60. DOI: http://dx.doi.org/10.2478/jwld-2019-0027

Tugay, A.M., Orlov, V.O. (2009). Water supply. Kyiv, Znannia. [in Ukrainian]

Zapolsky, A.K. (2005). Water supply, drainage and water quality. Kyiv, Vyshcha shkola. [in Ukrainian]

Tikhonyuk-Sidorchuk, V.O. (2003). Changing the adhesion forces of the contact medium of the quartz load of the contact clarifier when using the activated coagulant solution. Proceedings of Int. Congress "Evtek – 2003": "Ecology, technology, economy, water supply, sewerage", Yalta. [in Russian]

Vasylenko, O.A., Grabovsky, P.O., Larkina, G.M., Polishchuk, O.V., Progulny, V.Y. (2010). Reconstruction and intensification of water supply and sewerage facilities. Kyiv, Ukrgeliotek. [in Ukrainian]

Dushkin, S., Shevchenko, Т. (2020). Applying a modified aluminum sulfate solution in the processes of drinking water preparation. Eastern-European Journal of Enterprise Technologies, 106, 26–36. DOI: https://doi.org/10.15587/1729-4061.2020.210096

Dushkin, S.S., Blagodarnaya, G.I. (2009). Development of scientific bases of resource-saving technologies of preparation of ecologically pure drinking water. Kharkiv, KNAGH. [in Russian]

Nevedrov, A., Kolmakov, N., Subbotin, S., et al. (2015). Preparation of water for coke-plant water cycles. Coke and Chemistry, 58, 64–67. DOI: http://dx.doi.org/10.3103/S1068364X15020039

Alekseev, G. (2009). Water protection in coke-plant design. Coke and Chemistry, 52, 323–325. DOI: http://dx.doi.org/10.3103/S1068364X09070114

Dushkin, S.S. (2022). Improving the efficiency of horizontal settlers with thin-layer modules. Modern science and education: problems and development prospects. Katowice: Publishing House of the University of Technology, Monograph 51. [in Ukrainian]

Dushkin, S., Galkina, О. (2019). More Effective Clarification of Circulating Water at Coke Plants. Coke and Chemistry, 62, 474–480.

Dushin, S.S. (2012). Influence of activated coagulant solution on the ξ-potential and adsorption capacity of aluminum hydroxide. Bulletin of Odessa State Academy of Civil Engineering and Architecture, 45, 85–90. [in Russian]

Dushkin, S. (2019). Increase of environmental safety in the preparation of drinking water using a modified quartz loading of filter materials. Technogenic and ecological safety, 6 (2/2019), 54–59. DOI: https://doi.org/10.5281/zenodo.3559024 [in Ukrainian]

Dushkin, S.S., Blagodarnaya, G.I., Dushkin S.S., Shevchenko, T.A. (2018). Improving the efficiency of fast filters with the use of quartz loading modification. Water supply, sewerage, 1, 17–19. [in Russian]

Dushkin, S. (2022). Modification of the quartz loading contact clarifiers in water treatment processes. Technogenic and ecological safety,11 (1/2022), 55–60. [in Ukrainian]

Published

2022-06-24

How to Cite

Dushkin, S. (2022). CONTACT CLARIFIERS IN DRINKING WATER TREATMENT PROCESSES. Municipal Economy of Cities, 3(170), 44–52. https://doi.org/10.33042/2522-1809-2022-3-170-44-52