曝气生物滤池运行测试及相关动力学分析

Operation Test and Related Kinetic Analysis of Biological Aerated Filter

以实际黑臭水体为处理对象进行中试实验,考察曝气生物滤池稳态运行状况及抗冲击负荷能力,并探讨系统运行过程中基质降解动力学方程。研究结果表明,BAF对实际黑臭水体波动(COD为70.1~136.5 mg/L,ρ(NH;-N)=11.5~24.8 mg/L;ρ(TP)=0.5~1.2 mg/L)适应性较强,能抗击1.67 kg/(m^(3)·d)的COD容积负荷。连续运行出水的COD均在40 mg/L以下,NH;-N质量浓度均在5 mg/L以下,TP质量浓度均在0.5 mg/L以下,达到GB 18918-2002的一级A标;采用Monod模型对COD降解动力学过程进行解析,获得BAF去除COD的动力学经验模型:■,实验验证该动力学方程能较好地预测BAF出水水质,可以为BAF处理黑臭水体工艺设计提供参考。

Taking the actual black and odorous water as the treatment object,a pilot test was carried out to investigate the steady-state operating conditions and impact load resistance of the biological aerated filter,and to discuss the matrix degradation kinetic equation during the system operation.The research results show that BAF has strong adaptability to actual black and odorous water fluctuations(COD:70.1~136.5 mg/L,ρ(NH;-N)=11.5~24.8 mg/L,ρ(TP)=0.5~1.2 mg/L)and can resist 1.67 kg/(m^(3)·d)volume load.The COD of the effluent in continuous operation is below 40 mg/L,the NH_(3)-N is below 5 mg/L,and the TP is below 0.5 mg/L,reaching the first grade A standard of GB 18918-2002;the Monod model is used to degrade COD.The kinetic model of COD removal by BAF is obtained by analyzing the learning process:S=S;·exp(-1.279H/q;).The experiment verifies that the kinetic equation can better predict the quality of BAF effluent water,and it can be used for BAF treatment of black Provide reference for process design of odorous water body.