摘要

为研究充足的无机碳对同步亚硝化-厌氧氨氧化与反硝化(SNAD)工艺的恢复与稳定运行的影响,向硝酸盐氮积累而崩溃的SNAD反应器中投加过量无机碳,对反应器的运行情况进行研究.结果表明:在无机碳质量浓度为理论需要量的350%410%的条件下运行36 d后,出水硝酸盐氮由12.1 mg/L下降至3.47 mg/L,特征比由2.31升高至20.77;继续投加无机碳至理论需要量的200%310%,运行42 d后,总氮去除负荷由0.176 g/(L·d)升高至0.299 g/(L·d);投加无机碳前后,好氧氨氧化活性(AOR,RAO)与厌氧氨氧化活性(ANR,RAN)分别由0.061 4和0.040 6 g/(g·d)升高至0.081 1和0.065 9 g/(g·d).结果表明,充足的无机碳投加在有效解除SNAD工艺硝酸盐氮积累问题的同时,可以促进好氧氨氧化菌(AOB)和厌氧氨氧化菌(An AOB)的活性.

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