典型重金属离子对双污泥系统反硝化除磷的影响  

Effect of Typical Heavy Metal Ions on Process of Denitrifying Phosphorus Removal in Dual-Sludge System

作　　者：郭婷 董怡然 李想 吕锡武[1] GUO Ting;DONG Yiran;LI Xiang;Lü Xiwu(Energy and Environment College,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《净水技术》2022年第1期63-69,共7页Water Purification Technology

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07202004-002)。

摘　　要：为了研究和比较重金属对双污泥系统的影响,在双污泥系统稳定运行的基础上,通过调节进水重金属(Cd^(^(2+))、Cu^(^(2+))、Zn^(^(2+)))含量,分别考察了3种重金属短期冲击和长期冲击对双污泥系统碳、氮、磷去除效果的影响。结果显示,Cd^(2+)、Cu^(2+)、Zn^(2+)对硝化菌的短期急毒性和抑制作用关系为Cd^(2+)>Zn^(2+)>Cu^(2+),对硝化菌的累积毒性和抑制作用关系为Cu^(2+)>Cd^(2+)>Zn^(2+)。对反硝化聚磷菌的抑制作用关系为Cu^(2+)>Cd^(2+)>Zn^(2+),但Cu^(2+)的抑制作用以长期累积毒性为主,Cd^(2+)则以短期急毒性为主。CODCr去除率受3种重金属的影响比较小,其抑制作用关系为Cu^(2+)>Cd^(2+)>Zn^(2+)。In order to study and compare the effects of heavy metals on dual-sludge system,the effects of short-term and long-term impacts of three heavy metals on removal efficiency of carbon,nitrogen and phosphorus in dual-sludge system were investigated respectively by adjusting the content of heavy metals(Cd^(2+),Cu^(2+),Zn^(2+))in influent,based on the stable operation of dual-sludge system.Results showed that the short-term acute toxicity and inhibitory effects of Cd^(2+),Cu^(2+)and Zn^(2+)on nitrifying bacteria was Cd^(2+)>Zn^(2+)>Cu^(2+),and cumulative toxicity and inhibitory effects on nitrifying bacteria was Cu^(2+)>Cd^(2+)>Zn^(2+).Relationship of inhibitory effect on denitrifying phosphorus accumulating bacteria was Cu^(2+)>Cd^(2+)>Zn^(2+),but the inhibitory effect of Cu^(2+)was mainly long-term cumulative toxicity,while Cd^(2+)was mainly short-term acute toxicity.CODCr removal rate was less affected by three heavy metals,and inhibitory relationship was Cu^(2+)>Cd^(2+)>Zn^(2+).

关 键 词：重金属 双污泥系统 反硝化除磷 短期冲击 长期冲击 抑制 

分 类 号：X703[环境科学与工程—环境工程]