oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
铁 皮 石 斛 多 倍 化 诱 导 与 鉴 定 研 究  [PDF]
唐娅梅,张臣良,苏 兵,成 倩,纳海燕
北方园艺 , 2010, DOI: 10.11937/bfyy.201017057
Abstract:
无 氧 条 件 下TiO2 薄 膜 界 面 光 催 化 反 应 的XPS 研 究  [PDF]
杨喜昆,胡显智,何 兵,楚国栋
分子催化 , 2009,
Abstract: 设 计 利 用 X 射 线 光 电 子 能 谱 仪 的 高 真 空 系 统 作 为 无 氧 条 件 下 光 催 化 反 应 和 分 析 的 场 所 , 研 究 真 空 无 氧 环 境 和 大 气 有 氧 环 境 中 紫 外 光 激 发 TiO2 薄 膜 表 面 的 光 催 化 反 应 , 并 对 无 氧 条 件 下 TiO2 薄 膜 降 解 亚 甲 基 蓝 进 行 初 步 探 索 . 结 果 表 明 , 在 大 气 有 氧 和 真 空 无 氧 条 件 下 TiO2 薄 膜 经 紫 外 光 照 后 , 表 面 的 化 学 组 成 和 化 学 状 态 均 发 生 了 变 化 ; 在 有 氧 环 境 中 TiO2 薄 膜 表 面 氧 含 量 增 加 , 而 在 无 氧 环 境 中 TiO2 薄 膜 表 面 氧 含 量 减 少 . TiO2 薄 膜 表 面 的 吸 附 氧 是 维 持 无 氧 条 件 下 光 催 化 反 应 的 重 要 原 因 , 增 加 薄 膜 表 面 吸 附 氧 的 含 量 能 提 高 TiO2 薄 膜 在 无 氧 环 境 中 的 催 化 活 性 . 此 外 , 无 氧 条 件 下 TiO2 薄 膜 降 解 亚 甲 基 蓝 光 催 化 反 应 过 程 中 , 亚 甲 基 蓝 分 子 只 是 脱 去 了 某 个 含 氮 的 基 团 , 生 成 了 中 间 产 物 , 而 并 没 有 完 全 降 解 .
Start-up characteristics of anaerobic ammonia oxidation (ANAMMOX) biological filter reactor
厌氧氨氧化(ANAMMOX)生物滤池反应器的启动特性

Liu Xuejiao,Tian Zhiyong,Yang Hong,Song Yonghui,
刘雪娇
,田智勇,杨宏,宋永会

环境工程学报 , 2012,
Abstract: 采用平行对比实验,讨论不同实验条件下上向流厌氧氨氧化(ANAMMOX)滤池反应器的启动特性。对比条件为温度、接种污泥、联氨和羟胺。结果表明:温度是影响厌氧氨氧化细菌活性的主要因素;接种200mL具有活性的厌氧氨氧化污泥后,在避光、加热38℃、不控制联氨和羟氨的条件下,45d可成功启动厌氧氨氧化滤池反应器;反应过程NH4^+N:NO2^-·N:NO3-N的化学计量摩尔比为1:1.17:0.30,其总氮去除率达到87.38%,总氮容积去除负荷可达到1.41kg/(m^3·d)。
Bacterial anaerobic ammonia oxidation (Anammox) in the marine nitrogen cycle-Areview
海洋氮循环中细菌的厌氧氨氧化

Yiguo Hong,Meng Li,Jidong Gu,
洪义国
,李猛,顾继东

微生物学报 , 2009,
Abstract: Abstract: Anaerobic ammonium oxidation (Anammox) is a microbial oxidation process of ammonium, with nitrite as the electron acceptor and dinitrogen gas as the main product, and is performed by a clade of deeply branched Planctomycetes, which possess an intracytoplasmic membrane-bounded organelle, the anammoxosome, for the Anammox process. The wide distribution of Anammox bacteria in different natural environments has been greatly modified the traditional view of biogeochemical cycling of nitrogen, in which microbial denitrifier is considered as the only organism to respire nitrate and nitrite to produce nitric and nitrous oxides, and eventually nitrogen gas. More evidences indicate that Anammox is responsible for the production of more than 50% of oceanic N2 and plays an important role in global nitrogen cycling. Moreover, due to the close relationship between nitrogen and carbon cycling, it is anticipated that Anammox process might also affect the concentration of CO2 in the atmosphere, and influence the global climate change. In addition, the simultaneous transformation of nitrite and ammonium in wastewater treatment by Anammox would allow a 90% reduction in operational costs and provide a much more effective biotechnological process for wastewater treatment.
Anammox transited from denitrification in upflow biofilm reactor
ZHANG Shao-hui,ZHENG Ping,HUA Yu-mei,
ZHANG Shao-hui
,ZHENG Ping,HUA Yu-mei

环境科学学报(英文版) , 2004,
Abstract: Anammox was successfully transited from heterotrophic denitrification and autotrophic denitrification in two upflow biofilm reactors, respectively. The results showed that the volumetric loading rate and nitrogen removal efficiency in the reactor transited from heterotrophic denitrification were higher than that in its counterpart. When the hydraulic retention time was 12 h or so, the total nitrogen loading rate was about 0.609 kg N/(m3 x d), and the effluent ammonia and nitrite concentrations were less than 8.5 mg/L and 2.5 mg/L, respectively. The upflow anammox biofilm reactor was capable of keeping and accumulating the slow-growing bacteria efficiently. During operation of the reactor, the biomass color was gradually turned from brownish to red, and the ratio of ammonia consumption, nitrite consumption and nitrate production approached the theoretical one. These changes could be used as an indicator for working state of the reactor.
The Microbiology Research Progress of ANAMMOX Bacteria
ANAMMOX菌的微生物学研究进展

ZHAO Zhi-Hong,LI Xiao-Ming,LIAO De-Xiang,DENG Pin,LI Xu,
赵志宏
,李小明,廖德祥,邓嫔,李旭

微生物学通报 , 2007,
Abstract: Anaerobic ammonium oxidation(ANAMMOX)is a new process of nitrogen conversion that has prospect most currently.The AN- AMMOX process offers great opportunities to remove ammonia from wastewater without the addition of an external carbon source and with con- siderable less aeration costs in comparison with classical methods.ANAMMOX is a biologically mediated process.Three bacteria are identi- fied responsible for the process as new deep-branching planctomycete:Brocadia,Kuenenia and Scalindua.Described it to separate and the method,biochemistry path,the ecosystem physiology characteristic for authenticate and distribute.
Study on anammox of low concentration of ammonia nitrogen wastewater in ABR
低浓度氨氮废水在ABR中的厌氧氨氧化研究

Zhu Yueqi,Zhang Lijuan,Zeng Guoqu,Xu Meiying,Sun Guoping,
朱月琪
,张丽娟,曾国驱,许玫英,孙国萍

环境工程学报 , 2010,
Abstract: 在低浓度氨氮条件下利用厌氧折流板反应器(anaerobic baffled reactor, ABR)以厌氧污泥混合河涌底泥为接种源启动厌氧氨氧化(anaerobic ammonium oxidation,anammox)反应。系统连续运行4个月后出水趋于稳定,当NH3-N和NO–2-N容积负荷分别为3.91 g/(m3·d)和3.21 g/(m3·d)时,平均去除率分别为85.7%和98.8%。利用荧光原位杂交(fluorescence in situ hybridization, FISH)技术对ABR厌氧污泥进行了分析。随后,以缩短HRT或增加进水NH3-N和NO–2-N浓度的方式来逐步提高反应器运行负荷,最后当NH3-N和NO–2-N容积负荷分别达到65.53 g/(m3·d)和68.46 g/(m3·d)时,平均去除率为76.3%和91.3%,并培育出粒径为1.7~2.5 mm的颗粒污泥。利用扫描电镜(SEM)观察培育得到颗粒污泥与接种颗粒污泥,发现经驯化的ABR系统内微生物种类已变得较为单一,优势菌群发生明显变化。
Nitrogen removal from sludge dewatering effluent through anaerobic ammonia oxidation process
ZHANG Shao-hui,ZHENG Ping,HUA Yu-mei,
ZHANG Shao-hui
,ZHENG Ping,HUA Yu-mei

环境科学学报(英文版) , 2005,
Abstract: Anaerobic ammonia oxidation(Anammox) process is a novel and promising wastewater nitrogen removal process. The feasibility of transition of Anammox from denitrification and the performance of lab-scale Anammox biofilm reactor were investigated with sludge dewatering effluent. The results showed that Anammox process could be successfully started up after cultivation of denitrification biofilm and using it as inoculum. The transition of Anammox from denitrification was accomplished within 85 d. Anammox process was found suitable to remove ammonia from sludge dewatering effluent. The effluent ammonia concentration was detected to be 23.11 mgN/L at HRT of 28 h when influent ammonia concentration was fed 245 mgN/L, which was less than that for the national discharge standard II (25 mgN/L) of China. Volumetric total nitrogen loading rate was up to 584.99 mg TN/(L x d) at HRT of 17 h, while influent concentrations were kept 243.25 mg NH4(+) -N/L and 288.31 mg NO2(-) -N/L.
Coexistence, biodiversity and roles of ammonia-oxidizing archaea and anaerobic ammonium-oxidizing bacteria in deep soil layer of high nitrogen loaded paddy field
高含氮稻田深层土壤的氨氧化古菌和厌氧氨氧化菌共存及对氮循环影响

Zhu Guibing,
祝贵兵

生态学报 , 2011,
Abstract: Anaerobic ammonium oxidation(anammox) bacteria and ammonia oxidation archaea(AOA) play a very important role in nitrogen cycle in soil as well as in the marine ecosystems.These excellent discoveries have renewed the vision on nitrogen cycle.Anammox uses nitrite as an electron acceptor to convert ammonium into dinitrogen gas.The nitrite is delivered by AOA,since they convert ammonia into nitrite.To further explore this view,the coexistence of anammox bacteria and AOA were also studied in deep soil and paddyf...
Influence of temperature, pH value and organic substance on activity of ANAMMOX sludge
温度、pH值和有机物对厌氧氨氧化污泥活性的影响

Yang Yang,Zuo Jian-e,Shen Ping,Gu Xia-sheng,
Yang Y
,Zuo JE,Shen P,Gu XS

环境科学 , 2006,
Abstract: Influence of temperature, pH and organics on ANAMMOX activity was investigated through measuring the anaerobic ammonia oxidation rate of sludge. Results show that temperature and pH could influence ANAMMOX activity dramatically. The optimal temperature was between 30-35 degrees C , and the relationship between the anaerobic ammonia oxidation rate and temperature can be described by revised Arrhenius formula during 20-30 degreee C. The optimal pH was between 7.5 - 8.3, and the relationship between the anaerobic ammonia oxidation rate and pH can be described by two substrates and two inhibitors model during pH 7.0 - 9.0. There was substrata competition between the heterotrophic denitrification bacteria and ANAMMOX bacteria when organics in the
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.