Choice of Reagent Technology of Anticorrosion Water Treatment for Water-Distributing Network of St. Petersburg

Summary

The secondary pollution of city water in St. Petersburg with iron is caused by the highly corrosive aggressiveness of the Neva’s water, the source of the city water supply. The methods of reducing this water parameter are considered. The technology of neutralization of corrosive aggressiveness based on the injection of calcium chloride and sodium carbonate into water treated has been chosen. The technology of stabilizing water treatment has been introduced at the Sestroretsk and Petrodvorets water supply stations of St. Petersburg.

Key words

potable water , corrosion aggressiveness of water , calcium chloride , sodium carbonate , dozing system , water stabilization

Stabilization of corrosive water at the Petrodvoretz water treatment plant

Summary

In order to prevent corrosion in steel water distribution pipelines pilot tests of a water stabilization system fed with water from the South water treatment plant of Saint-Petersburg were carried out at the Petrodvoretz water treatment plant. During the entire period of chemical dosing steel passivation was achieved which provided for the tendency for iron concentration decrease at the test points of the Petrodvoretz water distribution network.

Key words

potable water , iron , calcium chloride , sodium carbonate , secondary pollution , corrosion activity , water stabilization system , network test point , passivation