| 进水负荷与硝化液回流比对低污泥浓度A~2/O工艺脱氮效果的影响 |
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| 引用本文： | 张兰河,王璐瑶,张万友,王旭明.进水负荷与硝化液回流比对低污泥浓度A~2/O工艺脱氮效果的影响[J].化工进展,2012,31(3):693-698. |
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| 作者姓名： | 张兰河 王璐瑶 张万友 王旭明 |
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| 作者单位： | （;1.东北电力大学化学工程学院，吉林 吉林 132012；;2.哈尔滨工业大学城市水资源与水环境国家重点实验室，
黑龙江 哈尔滨 150090；;3.北京农业生物技术研究中心，北京 100089） |
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| 基金项目： | 城市水资源与水环境国家重点实验室开放基金，吉林省科技发展计划社会发展重点项目 |
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| 摘 要： | 采用连续流A2/O工艺对模拟生活废水进行了长期连续实验，考察了低污泥浓度MLSS=(1500±200) mg/L]下进水负荷与回流比对脱氮效率的影响。结果表明，通过调节进水流量改变进水负荷，当进水负荷从5.03 gCOD/(gMLSS·d)逐渐提高至10.05 gCOD/(gMLSS·d)时，COD去除率≥95%，氨氮去除率由69.59%升高为95%，总氮去除率由53.53%升高到80%；当进水负荷由10.05 gCOD/(gMLSS·d) 提高至20.31 gCOD/(gMLSS·d)时，氨氮去除率下降为50%，总氮去除率下降为40%。通过调节进水COD改变进水负荷，当进水负荷从10.05 gCOD/(gMLSS·d) 逐渐提高到124.11 gCOD/(gMLSS·d) 时，COD和氨氮的去除率均>90%，总氮去除率从70%逐渐增加到85%。在混合液回流比分别为300%、200%和100%的条件下，回流比对COD和氨氮去除效果影响较小，COD去除率≥90%，氨氮去除率≥95%；回流比对总氮去除效果影响较大，随回流比的增大总氮去除率减小。当内回流比为100%时，总氮去除率最高，达到79.76%。
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| 关 键 词： | A2/O 污泥浓度 进水负荷 混合液回流比 |
Effect of influent loading and reflux ratio on de-nitrification under low sludge concentration |
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| ZHANG Lanhe,WANG Luyao,ZHANG Wanyou,WANG Xuming.Effect of influent loading and reflux ratio on de-nitrification under low sludge concentration[J].Chemical Industry and Engineering Progress,2012,31(3):693-698. |
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| Authors: | ZHANG Lanhe WANG Luyao ZHANG Wanyou WANG Xuming |
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| Affiliation: | （1School of Chemical Engineering，Northeast Dianli University，Jilin 132012，Jilin，China；2State Key Laboratory of Urban Water Resource and Environment，Harbin Institute of Technology，Harbin 150090，Heilongjiang，China； 3Beijing Agro-Biotechnology Research Center，Beijing 100089，China） |
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| Abstract: | A long-term continuous experiment of simulated wastewater was carried out using A2/O process and effect of influent loading and reflux ratio on the removal efficiency of nitrification was investigated at low MLSS of(1500±200) mg/L.The results show that the influent loading increases gradually from 5.03 gCOD/(gMLSS.d)to 10.05 gCOD/(gMLSS·d)and removal efficiency of COD is higher than 95% when influent loading is changed by adjusting influent flow rate.Removal efficiency of NH4+-N increases from 69.59% to 95% and removal efficiency of TN increases from 53.53% to 80%,respectively.Furthermore,when influent loading is enhanced to 20.31 gCOD/(gMLSS.d),removal efficiencies of NH4+-N and TN decrease to 50% and 40%,respectively. The influent loading increases from 10.05 gCOD/(gMLSS.d) to 124.11 gCOD/(gMLSS·d) when influent loading is changed by adjusting influent COD.Removal efficiencies of COD and NH4+-N are all higher than 90% and removal efficiency of TN increases gradually from 70% to 80%,respectively.When the reflux ratio of mixture is 300%,200% and 100%,respectively,removal efficiencies of COD and NH4+-N are less affected by reflux ratio.Removal efficiencies of COD and NH4+-N are higher than 90% and 95%,respectively.And meantime,removal efficiency of TN drops with the increasing reflux ratio,which is greatly influenced by reflux ratio.When the internal reflux ratio is 100%,removal efficiency of TN reaches the highest and it is higher than 80%. |
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| Keywords: | A2/O sludge concentration influent loading reflux ratio of mixture |
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