Reconstruction of the facilities for reusing wash water
from de-ironing plant filters

Summary

The object of the study is wash water from multi-layer rapid filters of a deironing plant and flocculant solution used for the wash water treatment. The purpose of the work is developing an optimal process flow scheme for the treatment of wash water for the subsequent reconstruction of the facilities for wash water treatment at the deironing plant in Tomsk. In the course of work, experimental studies were carried out of the interaction of the wash water generated after washing the rapid filters of the artesian water deironing plant in Tomsk with flocculant solution of various concentrations. As a result of the study, the optimal process flow scheme for the wash water treatment was selected; the dose of the flocculant solution was 0.3 g/m³ and the concentration of the flocculant solution was 0.05%. The extent of adoption was as follows: the results of the work were used in the reconstruction project of the wash water treatment facilities at the de-ironing plant in Tomsk. The data on the flocculant dose and concentration of the flocculant solution will be used in the operation of the facilities after the reconstruction. The effectiveness of the flocculant solution is determined by the degree of water clarification visually and in a lab environment by determining the concentration of iron oxide in clarified water. The economic efficiency of the selected process flow scheme is due to the return of 7200 m³/day of water for reuse saving more than 7% of the daily costs for water abstraction.

Key words

settling , sedimentation tank , deferrization , sludge , flocculant , wash water treatment , повторное использование