The effects of various parameters on the removal rate of CN were discussed in the paper. The results showed that under the conditions of 30℃ pH = 3.0, Fe2＋ dosage was 80 mg/L, the NaCIO concentration of 0.10 mol/L, ...The effects of various parameters on the removal rate of CN were discussed in the paper. The results showed that under the conditions of 30℃ pH = 3.0, Fe2＋ dosage was 80 mg/L, the NaCIO concentration of 0.10 mol/L, reaction time in 60 min, Fe2＋ has a satisfactory catalytic activation, and the removal rate of CN was about 37.89%.展开更多
[Objective] The aim was to obtain higher COD removal rate so as to guide the process of citric acid industrial wastewater. [Method] The effects of controllable factors, acidification time, hydraulic retention time, an...[Objective] The aim was to obtain higher COD removal rate so as to guide the process of citric acid industrial wastewater. [Method] The effects of controllable factors, acidification time, hydraulic retention time, and influent COD concentration, in-anaerobic treatment process of citric acid wastewater on COD removal rate were studied and the COD removal rate was optimized by response surface method. [Result] There was no interaction between acidification time and the other two factors. It was showed that hydraulic retention time and influent COD concentration had significant effect on COD removal rate and there was interaction between the two factors. The optimum COD removing process conditions was as follows: acidification time 1.53 h, hydraulic retention time 3.52 h and influent COD concentration 2 698 mg/L. Under the optimized conditions, the COD removal rate was 93.31% and it was much closed to the experimental result, 93.29%. [Conclusion] Using response surface method to optimize the anaerobic treatment of citric acid wastewater can result in optimized achievement.展开更多
文摘The effects of various parameters on the removal rate of CN were discussed in the paper. The results showed that under the conditions of 30℃ pH = 3.0, Fe2＋ dosage was 80 mg/L, the NaCIO concentration of 0.10 mol/L, reaction time in 60 min, Fe2＋ has a satisfactory catalytic activation, and the removal rate of CN was about 37.89%.
文摘[Objective] The aim was to obtain higher COD removal rate so as to guide the process of citric acid industrial wastewater. [Method] The effects of controllable factors, acidification time, hydraulic retention time, and influent COD concentration, in-anaerobic treatment process of citric acid wastewater on COD removal rate were studied and the COD removal rate was optimized by response surface method. [Result] There was no interaction between acidification time and the other two factors. It was showed that hydraulic retention time and influent COD concentration had significant effect on COD removal rate and there was interaction between the two factors. The optimum COD removing process conditions was as follows: acidification time 1.53 h, hydraulic retention time 3.52 h and influent COD concentration 2 698 mg/L. Under the optimized conditions, the COD removal rate was 93.31% and it was much closed to the experimental result, 93.29%. [Conclusion] Using response surface method to optimize the anaerobic treatment of citric acid wastewater can result in optimized achievement.
