Local treatment of dye-finishing works wastewater

Summary

The high efficiency of using galvanochemical method for local treatment of dyeing and finishing works wastewater is presented. The comparative analysis of galvanic coagulation and traditional coagulation with ferric salts used for azo dyes waste treatment allowed to define that the treatment efficiency in terms of the iron dosage introduced is higher in the process of galvanic coagulation than in the process of chemical coagulation. It is caused by the different mechanisms of chemical and electrochemical coagulation. The process flow chart was developed and offered for local treatment of wastewater of woolskin dyeing with direct and acid dyes.

Key words

wastewater , fur production , dyeing and finishing works , acid dye , local treatment , galvanic coagulation

Design and implementation of wastewater treatment projects

Summary

The analysis of technical solutions of surface run-off treatment process flow schemes is presented. The attention is focused on the necessity of selecting a treatment system in every specific case relying on the analysis of wastewater type and local drainage system. In addition the technological orientation of the local industries discharging their effluents into the municipal sewer shall be considered. One of the possible solutions of the given problem is the expediency of treatment of industrial effluents discharged into the storm sewer at the local treatment facilities located on the surface in a separate building or box at the industrial enterprise's premises.

Key words

settling , flotation , sorption , filtration , local treatment , retention basin-settler , underground treatment facilities