| 曝气压力对MABR中同步硝化反硝化脱氮的影响 |
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| 引用本文： | 张文丽,程方,丁小洋,任婧,马蓉蓉,张文精.曝气压力对MABR中同步硝化反硝化脱氮的影响[J].环境工程,2017,35(10):55-60. |
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| 作者姓名： | 张文丽 程方 丁小洋 任婧 马蓉蓉 张文精 |
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| 作者单位： | 1. 天津城建大学环境与市政工程学院,天津300384;天津市水质科学与技术重点实验室,天津300384;2. 天津城建大学环境与市政工程学院,天津,300384 |
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| 摘 要： | 以模拟生活污水为研究对象,探讨膜曝气生物反应器(MABR)推流运行时不同曝气压力下不同点位分布的溶解氧值特征;利用MABR可形成好氧/缺氧/厌氧的环境特性,针对曝气压力对MABR同步硝化反硝化脱氮效果的影响进行研究,借助微生物鉴定手段对MABR的群落结构进行分析。研究结果表明:相同曝气压力下的DO值,轴向上波动较大,径向上以曝气膜为中心向外部逐渐降低;随着曝气压力的增加,不同点位分布的DO值均提高,同步硝化反硝化效率先升高后降低。当曝气压力为0.04MPa时出水的同步硝化反硝化脱氮效果最佳为74.67%。在此曝气压力下,微生物群落鉴定证明生物膜内出现了好氧-兼氧的分层现象,生物膜内由好氧菌、兼氧菌共同完成硝化、反硝化过程,主体液料由厌氧菌作为优势菌群进行反硝化作用,并且根据未检测出厌氧氨氧菌的鉴定结果排除发生厌氧氨氧化的干扰。
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| 关 键 词： | 膜曝气生物反应器(MABR) 曝气压力 DO 同步硝化反硝化(SND) 群落分析 |
EFFECTS OF AERATION PRESSURE ON SIMULTANEOUS NITRIFICATION AND DENITRIFICATION IN MEMBRANE AERATION BIOREACTOR |
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| ZHANG Wen-li,CHENG Fang,DING Xiao-yang,REN Jing,MA Rong-rong,ZHANG Wen-jing.EFFECTS OF AERATION PRESSURE ON SIMULTANEOUS NITRIFICATION AND DENITRIFICATION IN MEMBRANE AERATION BIOREACTOR[J].Environmental Engineering,2017,35(10):55-60. |
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| Authors: | ZHANG Wen-li CHENG Fang DING Xiao-yang REN Jing MA Rong-rong ZHANG Wen-jing |
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| Abstract: | To simulate the domestic sewage as the research object,the distribution characteristics of dissolved oxygen was discussed under different aeration pressure in membrane aeration bioreactor(MABR) of pushing operation.The characteristics of MABR can provide aerobic/anoxic/anaerobic environments,the effect of aeration pressure on the simultaneous denitrification of MABR and analysis of community structure by nicrobial identification were studied.The results showed that:The DO value under the same aeration pressure fluctuated greatly in the axial direction,and decreased radially toward the outside with the aeration film;as the aeration pressure increased,the DO values of the different points were increased,simultaneous nitrification and denitrification increased firstly and then decreased.The best condition for SND was at the aeration pressure of 0.04 MPa.TN removal rate was 76.71％.Microbial community identification proved that the aerobic-oxygen stratification phenomenon appeared in the biofilm,the aerobic bacteria and oxygen bacteria completed the nitrification and denitrification process,and in the main liquid anaerobic bacteria as dominant bacteria conducted the denitrification process,and the interference of anaerobic ammonium oxidation was ruled out by the identification of the anaerobic ammonium bacteria. |
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| Keywords: | membrane aeration bioreactor aeration pressure DO SND community analysis |
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