【摘要】 为改善短程硝化曝气生物滤池(BAF)的运行效果,通过单因素试验确定了最佳温度、pH值和溶解氧(DO)浓度,并在此基础上采用响应面分析法中Box-Behnken中心组合设计进行了运行参数优化试验与回归模型分析。试验结果表明,短程硝化BAF最佳运行条件如下:温度为30℃、pH值为8. 5、DO为2. 0 mg/L;基于响应面分析法优化短程硝化BAF运行参数得到的最优模型如下:温度为28. 3℃、p H值为8. 1、DO为2. 15 mg/L,在此条件下对氨氮的去除率达到92. 15%,亚硝酸盐氮积累率为92. 65%。响应面试验回归模型的分析结果显示,该模型具有较高的显著性(P <0. 000 1),pH值和DO对氨氮去除率的影响显著,且交互作用明显;温度、pH值和DO对亚硝酸盐氮积累率的影响显著,且pH值和DO、温度和pH值交互作用明显。更多还原

【Abstract】 Single factor experiments were used to determine the optimum temperature,pH value and dissolved oxygen (DO) of a shortcut nitrification biological aerated filter (BAF) to improve its operational performance. On this basis,the Box-Behnken central combination design in response surface methodology was used to carry out the operational parameter optimization test and regression model analysis. The results showed that the optimum operational conditions of the BAF were as follows:temperature of 30 ℃, pH value of 8. 5 and DO of 2. 0 mg/L. Based on the response surface methodology,the obtained optimal operational parameters were as follows: temperature of 28. 3 ℃,pH value of 8. 1 and DO of 2. 15 mg/L. Under this condition,the ammonia nitrogen removal rate reached 92. 15%,and nitrite nitrogen accumulation rate was 92. 65%. Regression model analysis of response surface experiments indicated that the model had high significance (P < 0. 000 1). pH value and DO had significant influence on ammonia nitrogen removal rate,and the interaction was obvious. In addition,pH value,DO and temperature affected the nitrite nitrogen accumulation rate significantly, and the interaction between pH value and DO,temperature and pH value was obvious.更多还原