【摘要】 采用人工快渗滤池处理低基质含量污水,考察了进水NO₂^--N、NH₄⁺-N含量对厌氧氨氧化（ANAMMOX）脱氮性能的影响。结果表明,人工快渗滤池在进水ρ（NO₂^--N）/ρ（NH₄⁺-N）为1.3时ANAMMOX脱氮效果最佳,NH₄⁺-N、NO₂^--N、TN平均去除率分别高于98%、98%、91%。对ANAMMOX活性开始产生抑制作用的NH₄⁺-N、NO₂^--N质量浓度分别约为65、40 mg/L。提高进水NH₄⁺-N、NO₂^--N的质量浓度分别至100、50 mg/L时,ANAMMOX性能受到严重抑制,TN平均去除率分别降至62.2%、45.7%。受NO₂^--N严重抑制时,降低进水NO₂^--N的质量浓度至26 mg/L运行21 d后,TN去除率可恢复至受抑前的84.9%;受NH₄⁺-N严重抑制时,降低进水NH₄⁺-N的质量浓度至20 mg/L运行16 d后,TN去除率可恢复至受抑前的96.3%。NO₂^--N对ANAMMOX的抑制效应比NH₄⁺-N更强,所需的恢复时间更长。更多还原

【Abstract】 The effect of influent NO2--N and NH4+-N content on the nitrogen removal performance of ANAMMOX was investigated by using constructed rapid infiltration filter to treat wastewater with low substrate content. The results showed that the nitrogen removal efficiency of ANAMMOX was the best when the influent ρ(NO2--N)/ρ(NH4+-N) was 1.3, and the average removal rates of NH4+-N, NO2--N and TN were higher than 98%, 98% and 91%respectively, mass concentration of NH4+-N and NO2--N that inhibited the activity of ANAMMOX was respectively about 65 and 40 mg/L. When mass concentration of NH4+-N and NO2--N respectively increased to 100 and 50 mg/L, the ANAMMOX performance of the filter was severely inhibited, and the average TN removal rate decreased to 62.2% and 45.7%, respectively. When the ANAMMOX performance was seriously inhibited by NO2--N, TN removal rate could be recovered to 84.9% of the pre-inhibition level after 21 d via reducing the influent mass concentration of NO2--N to 26 mg/L. When the ANAMMOX performance was seriously inhibited by NH4+-N, TN removal rate could be recovered to 96.3% of the pre-inhibition level after 16 d via reducing the influent mass concentration of NH4+-N to 20 mg/L. The inhibitory effect of NO2--N on ANAMMOX was stronger than that of NH4+-N, and its recovery time was longer.更多还原