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进水氨氮浓度对SBR法处理猪场废水的影响

DOI: 10.11654/jaes.2013.08.024, PP. 1656-1663

Keywords: SBR,猪场废水,氨氮浓度,脱氮,除磷,COD去除

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Abstract:

为获得SBR应对不同氨氮浓度猪场废水的适应时间及处理能力的变化情况,以低浓度废水启动SBR达稳定状态,通过逐步改变进水氨氮浓度研究SBR出水指标的变化规律。结果显示:启动至稳定状态的SBR出水氨氮、COD和磷的浓度分别为(6.37±1.70)mg·L-1、(409.90±77.00)mg·L-1、(7.29±0.13)mg·L-1,相应的去除率平均值分别为99.25%、84.18%和74.09%;进水氨氮浓度增大,SBR在前10d整体处在冲击期,其间SBR的出水氨氮、COD和磷波动幅度较大,达稳定期后出水指标趋于稳定,且此时SBR能高效脱氮,但其降解COD和磷的能力降低。经长期高氨氮进水驯化SBR对COD的降解能力可恢复,氨氮浓度较高的进水中需要保证COD浓度以维持系统的除磷能力。

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