排序方式: 共有80条查询结果,搜索用时 316 毫秒
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为研究厌氧氨氧化-羟基磷灰石(Anammox-HAP)颗粒污泥系统的启动方法,采用厌氧氨氧化膨胀床反应器(AAFEB),接种少量厌氧氨氧化污泥,通过调控基质浓度和水力停留时间,考察系统内污泥粒径及胞外聚合物(EPS)的变化,同时监测系统的脱氮除磷性能.结果表明,在低上升流速0.213~1.066m/h、Ca/P=5.5物质的量比的条件下,不断提高进水氮负荷,实现了Anammox颗粒污泥系统的启动.总氮、正磷酸盐去除率分别为(78.0±9.8)%、(63.8±9.9)%,总氮容积负荷达2.74kg/(m3·d),在150d内培养出平均粒径为0.4mm的微颗粒污泥.颗粒的形态特征和元素分布检测表明其为Anammox-HAP颗粒污泥.随着颗粒污泥粒径的增加,EPS中的PS含量基本不变,PN从54.43mg/g增加到137.40mg/g,PN/PS从6.63提高到7.71.EPS中PN占比与粒径之间存在正相关,对污泥颗粒的形成起主要作用. 相似文献
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Improving Anammox start-up with bamboo charcoal 总被引:1,自引:0,他引:1
Chong-jun ChenXiao-xiao Huang Chen-xiao LeiWei-jing Zhu Ying-xu ChenWei-xiang Wu 《Chemosphere》2012,89(10):1224-1229
Three Upflow Anaerobic Sludge Blanket (UASB) reactors were compared for Anammox enrichment using synthetic wastewater with Spherical Plastic (SP) and Bamboo Charcoal (BC) addition, and without carrier (CK). After four months of operation, the Anammox activity occurred in all reactors allowing continuous removal of ammonium and nitrite. Ammonium and nitrite removal efficiencies were all higher than 98% in steady phase with the effluent concentrations below 1 mg L−1. The start-up time could be shortened from 117 to 97 d in CK and SP reactor to 85 d in BC amendment reactor. Quantitative PCR (q-PCR) analyses indicated a significant increase in the number of Anammox bacteria in BC amended reactor as compared with CK and SP during the entire start-up periods. The copy numbers of Anammox of 16S rRNA gene in the reactor with BC amendment could reach up to 6 × 109 copies g−1 Volatile Suspended Solids, around 22.5 times and 12.3 times greater than that in CK and SP reactor, respectively. BC addition could accelerate the start-up of Anammox and significantly increase the Anammox bacteria number. 相似文献
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采用两套厌氧氨氧化反应器R1和R2,研究了BMTM生物膜载体对厌氧氨氧化工艺启动特性的影响.结果表明,R1采用UASB反应器启动厌氧氨氧化反应器,经140d运行,对氨氮和亚硝酸盐氮的去除率仅达到54.6%和58.8%,氨氮与亚硝酸盐氮去除负荷之和仅为0.09kg/(m3×d),随后,向其上部投加0.6L BMTM载体,经过26d运行,氨氮及亚硝酸盐氮去除率分别迅速提升至92.5%和97.4%,R1的启动速度较之前有明显提高;R2采用BMTM载体启动上流式填料床生物膜反应器厌氧氨氧化工艺,经过83d的运行,氨氮及亚硝酸盐氮去除率分别达到83.6%和89.4%,氨氮与亚硝酸盐氮去除负荷之和达0.22kg/(m3×d),启动速度较R1大幅提高. 相似文献
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氨氮废水的厌氧氨氧化生物脱氮研究 总被引:1,自引:0,他引:1
利用从厌氧污泥中筛选和驯化的厌氧氨氧化(Anammox)菌直接启动UASB反应器,通过缩短水力停留时间(HRT)提高系统运行负荷,探讨水力停留时间对模拟废水脱氮性能的影响。结果表明,(1)富含Anammox菌的颗粒污泥能够快速启动反应器(只需14d)。(2)连续91d的HRT测试期间,系统具有良好的脱氮性能,且随着HRT的缩短,系统的脱氮效率具有波动上升的特点。NH4+-N、NO2--N和TN(总氮)的平均去除率超过70.0%。(3)系统总氮容积负荷(TNLR)和总氮去除负荷(TNRR)最大值(以N计)分别为2.04kg·m-3·d-1和1.56kg·m-3·d-1。(4)系统能够比较好的遵循Anammox生物脱氮的理论途径:NH4+-N、NO2--N的去除速率与NO3--N的生成速率的比例为1?1.15?0.22,与其相应理论值(1?1.32?0.26)非常接近。 相似文献
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Anaerobic ammonia oxidizing bacteria: ecological distribution,metabolism, and microbial interactions
Dawen Gao Xiaolong Wang Hong Liang Qihang Wei Yuan Dou Longwei Li 《Frontiers of Environmental Science & Engineering》2018,12(3):10
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Shuhan Li Xin Zhou Xiwei Cao Jiabo Chen 《Frontiers of Environmental Science & Engineering》2021,15(6):139
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Xianglong Xu Guohua Liu Yuanyuan Wang Yuankai Zhang Hao Wang Lu Qi Hongchen Wang 《环境科学学报(英文版)》2018,30(2):317-327
A sequencing batch reactor(SBR)-anaerobic ammonium oxidation(anammox) system was started up with the paddy soil as inoculated sludge. The key microbial community structure in the system along with the enrichment time was investigated by using molecular biology methods(e.g., high-throughput 16 S r RNA gene sequencing and quantitative PCR). Meanwhile,the influent and effluent water quality was continuously monitored during the whole start-up stage. The results showed that the microbial diversity decreased as the operation time initially and increased afterwards, and the microbial niches in the system were redistributed. The anammox bacterial community structure in the SBR-anammox system shifted during the enrichment, the most dominant anammox bacteria were Candidatus Jettenia. The maximum biomass of anammox bacteria achieved 1.68 × 10~9 copies/g dry sludge during the enrichment period, and the highest removal rate of TN achieved around 75%. 相似文献