精确曝气系统（AVS）在 AAO工艺中的运行分析

摘要

Aeration Volume Control System(AVS)has been applied to improve the original aeration system in Fengjing Waste Water Treatment Plant (WWTP)in August,2015. AVS calculates the air flow demanded according to the dynamic influent,and regulates the blowers and valves to supply and distribute the appropriate air quantity to the aeration system,to maintain the dissolved oxygen (DO)concentration in aeration tank (with the range of ± 0. 5 mg/ L to the target value),realizes the accurate control of DO. During the operating of AVS,effluent quality has been improved,standard-reaching rate of COD,NH 3 N,TN and TP increased 6. 66%, 1. 57%,5. 16% and 6. 16% respectively. The energy consumption in aeration reduces 11. 13% after the operating of AVS.%上海金山枫泾水质净化厂于2015年8月采用了精确曝气控制系统（AVS）对原有曝气系统进行升级改造。AVS系统采用“前馈＋模型＋反馈”的多参数控制模式，能够实时精确计算各控制区所需曝气量，并通过鼓风机与电动空气调节阀的联动调节，实现曝气池溶解氧的精细化控制（浓度维持在设定值±0．5 mg／ L内波动），提高了出水水质的稳定性及达标率，并实现了曝气环节的节能。在实施前后的对照时段内， COD、氨氮、总氮和总磷的达标率提升幅度分别为6．66％、1．57％、5．16％和6．16％；曝气环节电耗的下降幅度为11．13％。