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Solution to problems of bacterial impurity of heating systems

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Abstract

The article describes the problems of the operation of open and closed district heating systems related to the bacteriological contamination of heating-system water. It is noted that district heating systems are basically safe in sanitary epidemiological terms. Data on the dangers of sulfide contamination of heating systems are given. It is shown that the main causes of the development of sulfate-reducing and iron bacteria in heating systems are a significant biological contamination of source water to fuel heating systems, which is determined by water oxidizability, and a low velocity of the motion of heating-system water in the heating system elements. A case of sulfide contamination of a part of the outdoor heat-supply system of the city of Ulyanovsk is considered in detail. Measures for cleaning pipelines and heating system equipment from the waste products of sulfate-reducing bacteria and iron bacteria and for improving the quality of heating-system water by organizing the hydraulic and water-chemistry condition that makes it possible to avoid the bacteriological contamination of heating systems are proposed. The positive effect of sodium silicate on the prevention of sulfide contamination of heating systems is shown.

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Authors and Affiliations

  1. Ulyanovsk State Technical University, ul. Severny Venets 32, Ulyanovsk, 432027, Russia

    V. I. Sharapov & M. M. Zamaleev

Authors
  1. V. I. Sharapov
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  2. M. M. Zamaleev
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Correspondence to V. I. Sharapov.

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Original Russian Text © V.I. Sharapov, M.M. Zamaleev, 2015, published in Teploenergetika.

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Sharapov, V.I., Zamaleev, M.M. Solution to problems of bacterial impurity of heating systems. Therm. Eng. 62, 687–690 (2015). https://doi.org/10.1134/S0040601515060099

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