Study On ABR-SBR Process Characteristics And Its Application On Printing And Dyeing Wastewater Treatment

In this paper, "ABR-intensified SBR aerobic sludge process-advanced coagulated treatment process" was used to treat printing and dyeing industry wastewater from a sewage treatment plant. The research is mainly focused on the operational conditions and degradation process of composed process in treating this kind of wastewater. The following main conclusions are drawn from the research:(1) After ABR reactor was successfully started up, the indicators are detected under conditions of different HRT which were studied in this paper. The results show that 18h is the best retention time. In this condition, the removal rate of COD and color concentration are 49.9% and 52.0%; the increasing rate of NH3-N concentration is 21.8%; the biodegradability of wastewater has been improved. At above conditions, the microbiofacies can be clearly demarcated in different grid chambers and all microorganisms plays their role in degrading organic substance in ABR reactor after stable running 30 days.(2) The optimal operating conditions of SBR reactor should be aeration time 12h, settling time 1.5h and idle time 1.5h. On this condition, the removal rate of COD,NH3-N. TP and color concentration are 60.0%.93.0%.60.0% and 61.0% respectively.(3) Under this optimal operating condition, by adding activated carbon into SBR reactor in order to improve the wastewater treatment effect. The removal rate of COD,NH3-N,TP and color concentration are 77.3%,96.0%,60.1% and 80.0% respectively after adding 1.0g/L activated carbon. Activated carbon still can be put to good use when stably running one month. It shows that the practical application in engineering feasibility by Dosing activated carbon into SBR process is higher than ordinary SBR process.(4)The optimal coagulation conditions of advanced coagulated treatment process are PAC dosage of 0.2g/L, PAM dosage of 3.0 mg/L and the pH of input water is 8.0. Under above conditions, the maximum removal rates of COD, TP and color concentration are 58.0%.89.0% and 85.0% respectively.(5)After analyze the effects of Process Flow, The results show that:The final COD and color concentration of effluent water are less than 50.0mg/L and 10 times, the whole removal rate are more than 93.0% and 98.0%; The final NH3-N concentration of effluent water is between 1.0mg/L and 1.5mg/L, the whole removal rate is 97.1%; The final TP concentration of effluent water is less than 0.4mg/L, the whole removal rate is 95.9%; the output water could meet the DB32/072-2007 effluent standard.