The use of a redox indicator to determine corrosiveness of wastewater towards metal structures

Abstract

Abstract. Corrosion damages of metal structures of wastewater treatment facilities affect the work process parameters and operation safety. The analysis of the factors causing corrosion of metal elements and the assessment of corrosion resistance of the steel grades St08ps, St3sp and St5sp during the treatment stages, including the chlorine treatment, were conducted based on the data obtained from the Rostov-on-Don aeration plant. The article search techniques to determine the corrosiveness of water towards the metal structures. It is established that in this case it is advantageous to use redox indicator systems (rH2), which is calculated on the basis of field measurements of redox potential (ORP) of water. Based on the conducted studies, the correlation dependence for determining the corrosion rate of the steel grades St08ps and St5sp was suggested and statistically assessed for the aeration plant structures.

Restoration of the disturbed natural hydrological regime of the fish-breeding channel Kazachy Yerik within the framework of fishery reclamation

“…Clearing the channel of the Kazachy Erik branches from bottom sediments and driftwood will restore the channel's cultivation capacity, improve water exchange, the state of the feeding and reproduction value of water bodies, the sanitary and fishery state of the watercourse, and reduce the risk of negative impact of waters on adjacent territories [8][9][10].…”

“…Kazachy Erik, improvement of water exchange, improvement of the state of the feeding and reproduction value of water bodies, restoration of the disturbed natural hydrological regime of the river. Kazachy Erik, improving the sanitary and fishery state of water bodies, as well as preventing the flooding of adjacent lands in the event of an emergency [9][10][11][12].…”

Sewage cleaning by using a phase separator

“…In laboratory conditions, a test coagulation of IWW with applied and replaceable reagents was performed: carbide sludge (KI), lime (CaO) and sludge from the water treatment plant of the thermal power plant. When conducting trial coagulation, the conditions of mixing hydrodynamics were ensured [16].…”