| 引用本文: | 李冬,郭跃洲,劳会妹,曹美忠,张杰.基于部分硝化的不同曝停频率下脱氮性能的比较[J].哈尔滨工业大学学报,2019,51(8):8.DOI:10.11918/j.issn.0367-6234.201805016 |
| LI Dong,GUO Yuezhou,LAO Huimei,CAO Meizhong,ZHANG Jie.Comparison of nitrogen removal performances based on partial nitrification at different frequencies of alternating aerobic/anoxic[J].Journal of Harbin Institute of Technology,2019,51(8):8.DOI:10.11918/j.issn.0367-6234.201805016 |
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| 摘要: |
| 为研究相同曝停比且不同曝停频率下系统脱氮性能及氮素的变化,在室温下（18～20 ℃）,接种实验室培养成熟的亚硝化絮状污泥于序批式反应器（SBR）中,用时控开关控制周期内曝气/停曝时间为:2 min∶2 min,4 min∶4 min,10 min∶10 min,30 min∶30 min,120 min∶120 min,对反应器的情况进行研究.结果表明,不同曝停频率下的污泥系统均可以保持良好的亚硝化性能,系统的平均亚硝化率、平均氨氧化率分别为89.7%,87.1%.在曝气∶停曝时间为2 min∶2 min时,总氮去除率稳定至88.4%.随着周期内曝气/停曝时间的增加（曝停频率的减少）,总氮去除率出现下降的趋势,在曝气/停曝时间为120 min∶120 min时,总氮去除率下降至56.2%.由于较大曝停频率（曝气/停曝时间为2 min∶2 min）可以使曝气阶段生成的亚硝酸盐在下一个停曝阶段及时被反硝化细菌利用,提高了系统总氮去除率,故曝停频率和总氮去除率呈正相关.烧杯实验表明,在曝气/停曝时间为2 min∶2 min时,单位VSS氨利用速率为10.387 mg/(g·h),故曝停频率较大的运行方式可以筛选出氨利用速率较快的氨氮氧化菌(AOB),并且单位VSS硝酸盐生成速率最大仅为0.42 mg/(g·h),故可以减少污泥系统中相对亚硝酸盐氧化菌(NOB)数量. |
| 关键词: 曝停比 曝停频率 总氮去除率 氨氧化速率 硝酸盐生成速率 |
| DOI：10.11918/j.issn.0367-6234.201805016 |
| 分类号:X703.1 |
| 文献标识码:A |
| 基金项目:北京市青年拔尖团队项目(2014000026833TD02) |
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| Comparison of nitrogen removal performances based on partial nitrification at different frequencies of alternating aerobic/anoxic |
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LI Dong1,GUO Yuezhou1,LAO Huimei1,CAO Meizhong1,ZHANG Jie1,2
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(1.Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering (Beijing University of Technology), Beijing 100124, China; 2.State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology), Harbin 150090, China)
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| Abstract: |
| In order to assess the variations of nitrogen removal performance and nitrogen concentrations at different frequencies of alternating aerobic/anoxic (FAA) and same ratio of aeration time to anoxic time (2 min∶2 min, 4 min∶4 min, 10 min∶10 min, 30 min∶30 min, and 120 min∶120 min), mature partial nitrification sludge from laboratory was inoculated to sequencing batch reactor (SBR) at room temperature (18-20 ℃). Results showed that good partial nitrification was maintained at different FAA. The average nitritation rate and ammonia oxidation rate were 89.7% and 87.1%, respectively. When the aeration time: anoxic time was 2 min∶2 min, total nitrogen removal efficiency (TNE) increased to 88.4% and remained stable. With the increase of the aeration time∶anoxic time (decline of FAA), the TNE tended to decrease, and it reduced to 56.2% when the aeration time∶anoxic time was 120 min∶120 min. Owing that with high FAA (2 min∶2 min), the nitrite generated during the aeration period could be used by the denitrifying bacteria timely in the next anoxic phase, TNE was increased, and FAA was positively correlated with it. Results of beaker experiment showed that the maximum ammonia utilization rate (RAU) and maximum nitrate production rate (RNP) were 10.387 and 0.42 mg/(g·h) with the aeration time∶anoxic time of 2 min∶2 min. It indicated that the ammonia oxidation rate was faster with higher FAA, which can reduce the relative amount of nitrite oxidizing bacteria (NOB). |
| Key words: ratio of aeration time to anoxic time frequency of alternating aerobic/anoxic total nitrogen removal efficiency ammonia utilization rate nitrate production rate |
