Study on amelioration of dyeing wastewater treatment process and its benefit analysis

Key words: 
• dyeing wastewater /
• process amelioration /
• origin microorganism bacteria /
• benefit

Abstract: The treatment efficiency of dyeing wastewater using origin microorganism bacteria was inspected through analysis of experimental data, based on which the process of first biological treatment followed by flocculation was confirmed. The problems of the old treatment process was analyzed and was improved by inoculation of origin microorganism bacteria into dyeing wastewater combined with the biologic iron filling treatment. After the successful amelioration the process functioned steadily, the chroma and COD removal rates of effluent from compound biochemical pond and contact oxidation tank were 55.69%,55.63%，78.53% and 78.21%,respectively. The final pH, chroma and COD were 6.6, 13 times and 93 mg/L,respectively, which met the standard and drastically decreased the sewage sludge and the treatment cost.