基于模型辅助的污水处理厂抗冲击负荷定量化研究

Quantitative Study on Anti Shock Load of Sewage Treatment Plant based on Model Assistance

利用BioWin模型进行动态模拟,在满足出水水质达标的前提下,从进水污染物最大处理能力、不同冲击时长下进水污染物最大浓度两个维度,定量化评估了陶家污水处理厂的抗冲击负荷能力。结果表明:污水处理厂能处理的进水COD、NH_(3)-N和TP最大浓度为306.08 mg/L、24.90 mg/L和4.22 mg/L,分别为正常进水COD、NH_(3)-N和TP浓度的169%、198%和213%;污水处理厂抗冲击负荷能力随冲击时长逐渐降低,当遭受1~10 h的冲击时长时,污水处理厂能承受的最大冲击负荷为正常进水浓度的250%~130%;污水处理厂最大抗冲击负荷时长为6小时,6小时以上抗冲击负荷能力为正常进水浓度的1.3倍,即COD、NH_(3)-N和TP浓度为235.3 mg/L、16.35 mg/L和2.57 mg/L;TP是制约该污水处理厂抗冲击负荷能力的关键因子。

The BioWin model is used for dynamic simulation.On the premise of meeting the effluent quality standard,the anti shock load capacity of Tao jia sewage treatment plant is quantitatively evaluated from the two dimensions of the maximum treatment capacity of influent pollutants and the maximum concentration of influent pollutants under different impact duration.The results show that the maximum concentrations of COD,NH_(3)-N and TP in the influent that can be treated by the sewage treatment plant are 306.08 mg∕L,24.90 mg∕L and 4.22 mg∕L,which are 169%,198%and 213%of the normal influent cod,NH_(3)-N and TP respectively;The anti shock load capacity of the sewage treatment plant decreases gradually with the impact duration.When the impact duration is 1~10 hours,the maximum shock load that the sewage treatment plant can bear is 250%~130%of the normal influent concentration;The maximum anti shock load duration of the sewage treatment plant is 6 hours,and the anti shock load capacity of more than 6 hours is 1.3 times of the normal influent concentration,that is,the concentrations of COD,NH_(3)-N and TP are 235.3 mg∕L,16.35 mg∕L and 2.57 mg∕L;TP is the key factor restricting the shock load resistance of the sewage treatment plant.