HABR处理农村生活污水的脱氮性能及微生物群落结构
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摘要
本文研究了同步硝化反硝化、硝化反硝化复合式厌氧折流板反应器(HABR)处理农村生活污水的脱氮性能及同步硝化反硝化HABR内的微生物群落结构。两种HABR都能有效去除有机物。对于同步硝化反硝化HABR,通过间歇曝气控制溶解氧浓度,延长HRT能明显提高反应器的脱氮性能,NH4+-N浓度越高,所需HRT越长,反应器温度保持在31oC时脱氮效果好。对于模拟生活污水,曝气格室HRT为16 h时脱氮效率达到62%,且能够在C/N比为0.2条件下长期稳定运行。曝气单元中,反硝化细菌为优势菌种,相对丰度达50%;检测出少量亚硝化细菌,相对丰度不足1.5%。对于硝化反硝化HABR,回流比越高,脱氮效果越好,在300%回流比下,TN去除率达68%。两种HABR能达到相近的脱氮效率,从节约能耗的角度出发,硝化反硝化HABR适用于气候寒冷地区,而同步硝化反硝化HABR适用于气候炎热地区。
引文
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[2]孙瑞敏.我国农村生活污水排水现状分析[J].能源与环境,2010,5:33-34,42.
[3]刘晓璐,牛宏斌,闫海,等.农村生活污水生态处理工艺研究与应用[J].农业工程学报,2013,29(9):184-191
[4]卢阳阳.生活污水同步硝化反硝化脱氮研究[D].北京:北京交通大学,2013.
[5]李文昊.厌氧折流板反应器(ABR)启动及其动力学模型研究[D].重庆:重庆大学,2010
[6]肖静,许国仁.低碳氮比污水对同步硝化反硝化脱氮的影响[J].水处理技术,2012,38(11):77-80.
[7]方茜,张朝升,杜馨.间歇曝气模式对同步硝化反硝化稳定性的影响[J].环境科学学报,2009,29(7):1411-1418.
[8]Pochana K.,Keller J.Study of factors affecting simultaneous nitrification and denitrification(SND)[J].Water Science and Technology,1999,39(6):61-68.
[9]APHA,2005.Standard Methods for the Examination of Water and Wastewater,21st ed.APHA,Washington,DC.
[10]Nelson M.C.,Morrison Yu M.,Z..A meta-analysis of the microbial diversity observed in anaerobic digesters[J].Bioresource Technology,2011,102(4):3730-3739.
[11]肖宇.ABR-生态沟渠处理分散养猪冲洗水研究[D].兰州:兰州交通大学,2015.
[12]Hernon F.,Forbes C.,Colleran E.Identification of mesophilic and thermophilic fermentative species in anaerobic granular sludge[J].Water Science&Technology,2006,54(2):19-24.
[13]Ren J.,Yuan X.,Li J.,et al.Performance and microbial community dynamics in a two-phase anaerobic co-digestion system using cassava dregs and pig manure.Bioresour Technology,2014,155(4):342-351.
[14]张彦清.DO对附积床同步硝化反硝化及微生物菌群的影响研究[D].北京:北京工业大学,2012.
[15]Yamada T.,Sekiguchi Y.,Imachi H.,et al.Diversity,Localization,and Physiological Properties of Filamentous Microbes Belonging to Chloroflexi Subphylum I in Mesophilic and thermophilic methanogenic sludge granules[J].Applied&Environmental Microbiology,2005,71(11):7493-7503.