筒式光催化反应器降解养殖废水研究

Study on degradation of aquaculture wastewater by tubular photocatalytic reactor

以柔性纤维负载Ti O2为光催化剂,自制筒式光催化反应器,进行光催化模拟水产养殖废水实验,考察了曝气量、p H值、催化剂投加量与初始浓度等因素对氨氮去除率的影响。结果表明,在曝气量为1.0 L/min,催化剂用量12.5 g,碱性条件及初始浓度在90 mg/L时,氨氮降解率最高为85.3%。不同初始浓度氨氮的光催化降解速率符合准一级动力学模型,模拟养殖箱连续运行15 d表明,氨氮浓度降低,可满足水产养殖废水标准。

The tubular photocatalytic reactor was prepared by using Ti O2 as the photocatalyst,experiment on photocatalytic simulation of aquaculture wastewater. The effects of aeration rate,p H value,catalyst dosage and initial concentration on ammonia nitrogen removal rate were studied. The results showed that the degradation rate of ammonia nitrogen was 85. 3% when the aeration rate was 1. 0 L/min,the amount of catalyst was 12. 5 g,alkaline condition and the initial concentration of 90 mg/L. The photocatalytic degradation rate was in accordance with the quasi-first-order kinetics model. The continuous operation of 15 d of simulation container shows that the concentration of ammonia nitrogen was lower than that of aquaculture wastewater.