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HRT对UASB厌氧反硝化脱氮的影响

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吴姣姣, 黎远梅, 谭东梅, 彭宏, 肖鸿. HRT对UASB厌氧反硝化脱氮的影响[J]. 环境工程学报, 2018, 12(5): 1510-1516. doi: 10.12030/j.cjee.201711092
引用本文: 吴姣姣, 黎远梅, 谭东梅, 彭宏, 肖鸿. HRT对UASB厌氧反硝化脱氮的影响[J]. 环境工程学报, 2018, 12(5): 1510-1516. doi: 10.12030/j.cjee.201711092
shu
WU Jiaojiao, LI Yuanmei, TAN Dongmei, PENG Hong, XIAO Hong. Effects of HRT on anaerobic denitrification in UASB[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1510-1516. doi: 10.12030/j.cjee.201711092
Citation: WU Jiaojiao, LI Yuanmei, TAN Dongmei, PENG Hong, XIAO Hong. Effects of HRT on anaerobic denitrification in UASB[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1510-1516. doi: 10.12030/j.cjee.201711092
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HRT对UASB厌氧反硝化脱氮的影响

  • 1.

    四川农业大学环境学院,成都 611130

  • 基金项目:

    四川省教育厅科研项目（16ZB0051）

Effects of HRT on anaerobic denitrification in UASB

  • 1.

    College of Environment,Sichuan Agriculture University, Chengdu 611130, China

  • Fund Project:

  • 摘要: 在反硝化脱氮的影响因素方面，研究多集中在碳源种类和碳氮比（C/N）2 个方面，而对水力停留时间（HRT）的影响很少有报道。采用UASB 作为厌氧反硝化反应器，进水NO3--N 为50 mg·L-1，C/N 比固定为1.5，分别以葡萄糖和乙酸钠作碳源，研究HRT 对反硝化效果的影响。结果表明：当外加碳源为葡萄糖时,最佳HRT为6 h,此时NO3--N和TN的去除效果最好,去除率分别为79.5%和63.8%,出水NO2--N和NH4+-N浓度分别为4.69 mg·L-1和2.22 mg·L-1;当外加碳源为乙酸钠时,最佳HRT为4 h,对应的NO3--N和TN去除率分别为99.0%和91.4%,出水NO2--N和NH4+-N浓度分别为3.08 mg·L-1和0.47 mg·L-1。HRT对反硝化效果有显著影响,且跟碳源种类有关。HRT会影响反硝化菌、反硝化异化还原成铵（DNRA）细菌和其他异养菌之间的平衡。
    Abstract: As regards influencing factors of nitrogen removal by denitrification, attentions have been focused on two aspects: carbon source type and carbon/nitrogen ratio（C/N）. However, few reports referred to hydraulic retention time (HRT). In present work, effects of HRTs on anaerobic denitrification in UASB reactor were investigated. Nitrate concentration in influent was 50 mg·L-1 and the C/N ratio was 1.5. Glucose and sodium acetate were used as the sole carbon source, respectively. The experimental results showed that when the carbon source was glucose, the optimal HRT was 6 h, corresponding removal rates of NO3--N and TN were 79.5% and 63.8%, respectively. NO3--N and NH4+-N concentrations in effluent were 4.69 mg-1 and 2.22 mg·L-1, respectively. When the carbon source was sodium acetate, the optimal HRT was 4 h, corresponding removal rates of NO3--N and TN were 99.0% and 91.4%, respectively. NO2--N and NH4+-N concentrations in effluent were 3.08 mg·L-1 and 0.47 mg·L-1, respectively. The present study concluded that HRT, combined with carbon source types, had a significant effect on denitrification and HRT affected the balance among denitrifying bacteria, bacteria responsible for dissimilatory reduction of nitrate to ammonium (DNRA) and other heterotrophic bacteria.
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  • 刊出日期:  2018-05-19

HRT对UASB厌氧反硝化脱氮的影响

  • 1. 四川农业大学环境学院,成都 611130
基金项目:

四川省教育厅科研项目（16ZB0051）

摘要: 在反硝化脱氮的影响因素方面，研究多集中在碳源种类和碳氮比（C/N）2 个方面，而对水力停留时间（HRT）的影响很少有报道。采用UASB 作为厌氧反硝化反应器，进水NO3--N 为50 mg·L-1，C/N 比固定为1.5，分别以葡萄糖和乙酸钠作碳源，研究HRT 对反硝化效果的影响。结果表明：当外加碳源为葡萄糖时,最佳HRT为6 h,此时NO3--N和TN的去除效果最好,去除率分别为79.5%和63.8%,出水NO2--N和NH4+-N浓度分别为4.69 mg·L-1和2.22 mg·L-1;当外加碳源为乙酸钠时,最佳HRT为4 h,对应的NO3--N和TN去除率分别为99.0%和91.4%,出水NO2--N和NH4+-N浓度分别为3.08 mg·L-1和0.47 mg·L-1。HRT对反硝化效果有显著影响,且跟碳源种类有关。HRT会影响反硝化菌、反硝化异化还原成铵（DNRA）细菌和其他异养菌之间的平衡。

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