摘要
利用响应面法(RSM)优化设计CASS工艺处理市政污水的各项工艺运行参数,通过Box-Behnken Design(BBD),以TP、NH3-N去除率为响应值建立二次回归模型,并选定缺氧搅拌时间、曝气时间、充水比和DO值为影响因素,考察各因素交互影响的显著性。确定了CASS工艺脱氮除磷的最优工艺参数为:缺氧搅拌时间为120 min、曝气时间为90min、充水比为0.30,ρ(DO)为1.29 mg/L。在此最优条件下,TP去除率为63.83%,NH3-N去除率为80.24%。对比分析模型计算的预测值与实验值,TP、NH3-N去除率预测值偏差分别介于-1.65%^+1.73%和-2.04%^+1.75%,表明在不同的低碳源进水条件下,用该模型代替真实工艺运行参数对实验结果进行分析具有较高的可靠性。
The CASS process parameters were optimized by using response surface method(RSM),for treating municipal wastewater with low carbon source content.The secondary regression model was established by using the Box-Behnken Design(BBD)to the response value of TP and NH3-N.The significance of the interaction effect of each factor was investigated,including anoxic mixing time,aeration time,water filling ratio and DO.The optimal process parameters for the removal of nitrogen and phosphorus were determined as follows:anoxic mixing time of 120 min,aeration time of 90 min,water filling ratio of 0.30,and DO of 1.29 mg/L.Under the optimal conditions,the removal rate of TP was 63.83%and NH3-N was80.24%.Comparing the measured and predicted values based on model calculation,predictive value deviation of TP and NH3-N removal efficiency was-1.65%^+1.73%and-2.04%^+1.75%,respectively.Results indicated that,under the condition of different low carbon source inlet water,the model was with high reliability when replacing the real test to analyze the test results.
作者
程诚
CHENG Cheng(Wuhan Municipal Water & Waster Engineering Design Institute,Wuhan 430014,China)
出处
《环境工程》
CAS
CSCD
北大核心
2019年第10期133-138,共6页
Environmental Engineering
关键词
污水处理
CASS工艺
响应面法
参数优化
节能降耗
wastewater treatment
CASS process
response surface methodology(RSM)
parameter optimization
energy saving and consumption reducing
