摘要：

采用SBR反应器考察了Cu（Ⅱ）短期作用对亚硝化反应器的影响规律，结果表明，低浓度的Cu（Ⅱ）（≤10 mg/L）对亚硝化有促进作用，并且在3~10 mg/L范围内影响规律相似。高浓度的Cu（Ⅱ）（≥20 mg/L）抑制AOB的活性，同时诱导了NOB的活性。Cu（Ⅱ）≥30 mg/L时NOB也被抑制。Cu（Ⅱ）对AOB的半抑制质量浓度为21.8 mg/L。在短期作用后，污泥中的铜含量增加。AOB被Cu（Ⅱ）完全抑制后，通过向反应器中投加20 mg/L EDTA螯合提取污泥中的铜离子，可使亚硝化得到恢复，同时污泥中的铜减少。

关键词: 铜离子, 亚硝化, 自养脱氮, AOB, NOB

Abstract:

The short-term effect of Cu(Ⅱ) on partial nitrification(PN) process has been studied in a SBR. The results show that Cu(Ⅱ) with low concentration(≤10 mg/L) has facilitative effect on PN process,and the influence rule is similar in the range of 3-10 mg/L. However,Cu(Ⅱ) with high concentration(≥20 mg/L)could significantly inhibit the AOB bioactivity,and induce the NOB bioactivity simultaneously. The NOB bioactivity is also suppressed when Cu(Ⅱ) is increased to 30 mg/L. The half inhibition concentration of Cu(Ⅱ) on AOB is 21.8 mg/L. After shortterm effect,the copper in sludge is increased. After AOB is completely suppressed by Cu(Ⅱ),20 mg/L EDTA is adopted to chelate and extract Cu(Ⅱ) from sludge,and the PN process is successfully recovered as result.

Key words: Cu (Ⅱ), partial nitrification, autotrophic nitrogen removal, AOB, NOB

中图分类号: 

• X703