| 引用本文: | 张杰,劳会妹,李冬,魏子清.曝气强度对SBR亚硝化工艺运行影响试验[J].哈尔滨工业大学学报,2020,52(11):1.DOI:10.11918/201905130 |
| ZHANG Jie,LAO Huimei,LI Dong,WEI Ziqing.A study of the effect of aeration intensity on nitrosation process operated in SBRs[J].Journal of Harbin Institute of Technology,2020,52(11):1.DOI:10.11918/201905130 |
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| 摘要: |
| 曝气强度是调控间歇曝气DO的重要参数,为明晰总曝气强度相同、曝气强度不同对间歇曝气SBR亚硝化工艺的影响,在25~28 ℃下,接种亚硝化性能良好的活性污泥于间歇曝气SBR反应器中,结合响应面分析研究间歇曝气下曝气强度对亚硝化系统稳定性的影响.结果表明,控制曝气强度为1.2 L/(h·L),亚硝态氮积累率可达93%,但氨氮去除率仅为80%.增加曝气强度到1.58 L/(h·L),随着运行周期增加,亚硝化性能逐渐恶化.控制曝气强度为1.93 L/(h·L),系统的平均氨氧化率和亚硝酸盐积累率为90%和91.6%,实现了较高的氨氧去除和亚硝酸盐积累.批次实验及响应面分析表明,曝气强度及曝气时长对氨氮去除及亚硝酸盐的积累均有显著影响,曝气时间越短亚硝酸盐积累率越高,曝气强度越大氨氮去除率越高.但低曝气强度下AOB的活性受到抑制,通过延长曝气时长并不能保持良好的氨氮去除.在过高曝气强度下,AOB的活性不能得到相应的增强,氨氮去除率及亚硝酸盐积累率只受曝气时长的影响,因此,在总曝气强度相同下,可采取较高的曝气强度配合短曝气时长来实现高氨氮去除及亚硝酸盐积累. |
| 关键词: 间歇曝气 亚硝酸盐积累率 曝气强度 曝气时长 响应面分析 |
| DOI：10.11918/201905130 |
| 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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| A study of the effect of aeration intensity on nitrosation process operated in SBRs |
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ZHANG Jie1,2,LAO Huimei1,LI Dong1,WEI Ziqing1
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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: |
| Aeration intensity is an important parameter to control intermittent aeration DO. To clarify the effects of same total aeration intensities and different aeration intensities on the intermittent aeration SBR nitrosation process, activated sludge with good nitration abilities was inoculated in reactors at 25-28 ℃. Effect of aeration intensity under intermittent aeration on the stability of nitrosation system was studied using response surface analysis in an intermittent aeration SBR reactor. Results show that the controlled aeration intensity of 1.2 L/(h·L) could inhibit the activity of NOB, where the nitrite nitrogen accumulation rate could reach 93%, while the ammonia nitrogen removal rate was only 80%. When the aeration intensity was increased to 1.58 L/(h·L), the nitrosation performance was deteriorated with the increase of the operating cycle. When the aeration intensity was 1.93 L/(h·L), and the ammonia oxidation rate and nitrite accumulation rate were 90% and 91.6%, higher ammonia oxygen removal and nitrite accumulation were achieved. Batch experiments and response surface analysis showed that aeration intensity and aeration time had significant effects on ammonia nitrogen removal and nitrite accumulation. The shorter the aeration time was, the higher the nitrite accumulation rate would be achieved, and the higher the aeration intensity was, the higher the ammonia nitrogen removal efficiencies would be achieved. However, the activity of AOB was suppressed under low aeration intensity, and the high ammonia nitrogen removal efficiency could not be maintained by prolonging the aeration time. Under high aeration intensity, the activity of AOB could not be enhanced accordingly. The ammonia nitrogen removal rate and the nitrite accumulation rate were only affected by the aeration time. Therefore, under the same total aeration intensities, higher aeration intensity should be adopted with the combination of short aeration time to achieve high ammonia nitrogen removal and nitrite accumulation. |
| Key words: intermittent aeration nitrite accumulation rate aeration intensity aeration time response surface analysis |
