№01|2015

DRINKING WATER SUPPLY

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UDC 628.166.094.3

FESENKO L. N., Ignatenko S. I., Pchel'nikov I. V.

Improving the technology of sodium hypochlorite production by seawater electrolysis

Summary

An alternative method of low concentrated sodium hypochlorite production by seawater electrolysis in substitution for sodium hypochlorite produced by the traditional technology from table white salt solution is considered. The results of studying sodium hypochlorite production by electrolysis of the natural Black Sea water, model Black Sea water in comparison with 3% table white salt solution are presented. The effect of physical and chemical parameters of seawater electrolysis on the amount of generated active chlorine was experimentally investigated. The chemical composition and structure of cathodic deposits formed with time during the electrolysis of seawater, decarbonated seawater and 3% table white salt solution were determined. Comparative evaluation of corrosion and electrochemical characteristics of metal-oxide anode coatings (oxide ruthenium-titanium anodes and oxide iridium-ruthenium-titanium anodes) at seawater and 3% NaCl solution is presented. The expediency of producing sodium hypochlorite by seawater electrolysis was experimentally confirmed and the optimal process conditions were determined. The optimal composition of metal-oxide anode coatings used in low concentrated sodium hypochlorite by seawater electrolysis was determined. Based on the results of research and experimental studies the recommendations for the selection of process flow schemes of sodium hypochlorite production by seawater electrolysis in circulating and flow operation modes were prepared, and the sound fields of their application were justified. The technical and economic assessment of the recommended technology was carried out.

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REFERENCES

  1. Iagud B. Iu. Materialy konferentsii «Primenenie razlichnykh dezinfitsiruiushchikh agentov v sistemakh vodopodgotovki pit’evoi vody v SShA v 2007 g.» [Proceedings of «The use of various disinfectants in the USA drinking water treatment systems in 2007» Conference, Moscow, 2007, 145 p.].
  2. Fesenko L. N., Ignatenko S. I., Babaev A. A., Pchel’nikov I. V. [Comparative analysis of the methods of producing chlorine-containing chemicals for water disinfection]. Vodosnabzhenie i Kanalizatsiia, 2013, no. 7–8, pp. 34–38. (In Russian).
  3. Iagud B. Iu. Opyt primeneniia khlora, gipokhlorita natriia, dvuokisi khlora na zarubezhnykh stantsiiakh vodopodgotovki: Vserossiiskii seminar «Tekhnika i tekhnologiia obezzarazhivaniia pit’evykh i stochnykh vod bez ispol’zovaniia elementarnogo khlora» [The experience of using chlorine, sodium hypochlorite, chlorine dioxide at foreign water treatment facilities: All-Russia seminar «Equipment and technologies of elemental chlorine free disinfection of drinking and waste water». Moscow, 2008].
  4. Fesenko L. N., Ignatenko S. I., Skriabin A. Iu., Pchel’nikov I. V. [Addressing the issues of environmentally friendly and non-waste production of electrolytic sodium hypochlorite for drinking water disinfection]. Vodoochistka, 2014, no. 3, pp. 9–16. (In Russian).
  5. Karlson R. K., Mouts M. S., Khardi K. L. [Patent 2379380, RF. IPC С 25 В 11/10. High efficiency hypochlorite anode coating]. Izobreteniia. Poleznye Modeli, 2010, no. 2. (In Russian).

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