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denitrification     
相关语句
  反硝化
    Study on Biological Nitrification and Denitrification via Nitrite for Coke-plant Wastewater
    焦化废水亚硝化反硝化生物脱氮的研究
短句来源
    Influence of Different Carbon Sources on Denitrification
    不同碳源对生物反硝化的影响
短句来源
    Digested Sludge Supernatant Carbon Source for Biological Denitrification
    消化污泥上清液碳源生物反硝化
短句来源
    Denitrification for Removing Nitrogen in Wastewater
    废水反硝化除氮
短句来源
    THE INFLUENCE OF PH VALUES AND TEMPERATURE ON DENITRIFICATION
    pH值、温度对反硝化的影响
短句来源
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  脱氮
    Study on Biological Nitrification and Denitrification via Nitrite for Coke-plant Wastewater
    焦化废水亚硝化反硝化生物脱氮的研究
短句来源
    Study on Simultaneous Desulfurization and Denitrification from Flue Gas Using Urea-Additive Solution
    尿素添加剂湿法烟气同时脱硫脱氮研究
短句来源
    THE TEST AND DESIGN OF _A/O BIOLOGICAL DENITRIFICATION SYSTEM
    A/O生物脱氮系统设计参数选定
短句来源
    Ascertainment of Main Factors for Biological Denitrification System Using Orthogonal Test
    用正交试验法确定生物脱氮系统的主要影响因素
短句来源
    Fixed-film A/O Biological Denitrification Treatment for Refinery Wastewater A Pilot-scale Study
    膜法A/O生物脱氮技术处理炼油污水中试研究
短句来源
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  反硝化作用
    Denitrification and N_2O Emission and Consumption at Coastal Tidal Flat, Yangtze Estuary
    长江口滨岸潮滩沉积物反硝化作用及N_2O的排放和吸收
短句来源
    DENITRIFICATION AND NITROGEN FIXATION OF NITROGEN-FIXER Alcaligenes faecalis IN THE RICE RHIZOSPHERE AND EXUDATION OF RICE ROOT
    水稻根际固氮粪产碱菌(Alcaligenes faecalis)的反硝化作用、固氮作用和水稻的根分泌作用
短句来源
    Cd~(2+),Cu~(2+), and Zn~(2+) Influence on Denitrification in Constructed Wetland
    Cd~(2+)、Cu~(2+)和Zn~(2+)对人工湿地反硝化作用的影响
短句来源
    Effects of allelochemicals on growth of Bacillus subtilis and its denitrification under anaerobic condition
    化感物质对枯草芽孢杆菌(Bacillus subtilis)在厌氧条件下的生长及反硝化作用的影响
短句来源
    Denitrification of ~(15)N labeled nitrate-N in rice field soil under different redox conditions.
    不同氧化还原电位条件下稻田土壤中~(15)N标记硝态氮的反硝化作用
短句来源
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  脱硝
    Experimental and Theoretical Study on Flue Gas Denitrification by DC Corona Oxidation Integrating with Chemical Scrubber
    直流电晕氧化结合化学吸收烟气脱硝实验及机理研究
短句来源
    Study of SCR Catalyst for Coal-fired Flue Gas Denitrification Grafted on Nanometer Titania
    以纳米TiO_2为载体的燃煤烟气脱硝SCR催化剂的研究
短句来源
    Thus,development of new technology and equipment for simultaneous desulfurization and denitrification was imperative.
    这种方式不仅占地面积大,而且投资和运行费用高,为了降低烟气净化的费用,开发同时脱硫脱硝新技术、新设备已迫在眉睫。
短句来源
    Experiments show that in presence of oxygen,with the time interval of pre-admission of water vapor into the reactor kept at about 15 min,and 100 minutes of irradiation after the admission of flue gas,a desulfurization efficiency of 98% and a denitrification efficiency of 67% can be attained.
    实验表明:有氧条件下,反应器预通水蒸汽时间控制在15 min左右,通入烟气后,照射时间100 min,获得脱硫效率为98%,脱硝效率为67%的结果。
短句来源
    Study on the Denitrification of Flue Gas by Pulse Corona Discharge
    脉冲放电烟气脱硝的研究
短句来源
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  denitrification
Nitrification and denitrification in subalpine coniferous forests of different restoration stages in western Sichuan, China
      
Denitrification is generally referred to as the microbial reduction of nitrate to nitrite and further gaseous forms of nitric oxide, nitrous oxide and molecular nitrogen.
      
The results showed that forest restoration stage had no significant effects on gross nitrification rates or denitrification rates (One-way ANOVA (analysis of variance), p >amp;lt; 0.05).
      
Denitrification rates in all the forest soils were low and not closely correlated with water content, soil pH, organic matter, or total nitrogen.
      
Nevertheless, we found that C/N ratios obviously affected denitrification rates (p >amp;lt; 0.05).
      
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In the paper, two different processes, granular activated carbon adsorption ("C"process) and Ozonation-activated carbon adsorption ("O_3 + C"process), were studied experimentally for removal of three forms of nitrogen from potable water on a comparative way. The results indicate that the ozonation is capable of oxidizing organic nitrogen into NH_3-N, and NO_2~--N into NO_3~--N, thus resulting in the increase of their content in the effluent. It was also found out that the ammonium nitrogen was effectively removed...

In the paper, two different processes, granular activated carbon adsorption ("C"process) and Ozonation-activated carbon adsorption ("O_3 + C"process), were studied experimentally for removal of three forms of nitrogen from potable water on a comparative way. The results indicate that the ozonation is capable of oxidizing organic nitrogen into NH_3-N, and NO_2~--N into NO_3~--N, thus resulting in the increase of their content in the effluent. It was also found out that the ammonium nitrogen was effectively removed in the activated carbon beds by the mechanisms of microbiological assimilation and nitrification. However, in the"C"process, the nitrification process was dominated by the nitrite forming stage, and consequently the nitrite concentration of the effluent from the carbon bed is much higher than that of influent. Meanwhile, the carbon bed of the "C"process exhibited considerably high removal efficiency for nitrate. This is considered to be due to the mechanisms of biological denitrification and reduction of nitrate by a biodegradation product, alcoholic cthyl acid, into N_2 under the oxygen deficient condition in the carbon bed. In the "O_3 + C"process, the nitrification process was carried to the end with formation of nitrate under oxygen-sufficient conditions in the carbon bed. As a result, the nitrate concentration in the effluent increased markedly over the influent. The increased hydrogen ions, H~+ resulted from nitrification can be neutralized by the hydroxide ions, OH~+ dissociated from the carboxide groups on the activated carbon surface, thus preventing the effluent pH from dropping significantly.

本文对粒状活性炭吸附法和臭氧一活性炭吸附法两种处理流程(简称“C”流程和“O_3+C”流程)进行了从饮用水中去除三态氮的对比试验。结果表明,臭氧化能够将有机氮氧化成氨氮;亚硝酸盐氮氧化成硝酸盐氮,从而使它们在出水中的含量增加。试验还发现,在活性炭滤床中通过生物同化和硝化作用等机理有效地除去了氨氮。但是在“C”流程中硝化过程以亚硝化阶段为主,使出水中亚硝酸盐浓度远大于进水浓度。同时,“C”流程具有相当的硝酸盐去除率。

This paper presents the test of A/O biological denitrification system . Pilot and productive tests show that , under the conditions of SRT controlled at 15-20 days, sludge load = 0. 2 - 0. 3kg MLSS . d, and COD/TKN>8, the removal rate of total nitrate (TN) may reaches over than 70%. Finally the design of A/O technique and the formulae used to compute the capacity of anoxic and oxic ponds are also introduced .

本文介绍了A/O生物脱氮系统的试验情况。中型试验和生产性试验结果表明:控制泥龄15~20天、污泥负荷0.2~0.3kgCOD/kgMLSS·d、COD/TKN大于8的条件下,总氮去除率可达70%以上。本文还提出了A/O工艺设计的方法,介绍了缺氧池,好氧池体积的计算公式。

This paper expounds and reviews flue gas denitrification processes, removing nitrogen oxide processes from flue gas or exhaust gas. Flue gas denitrification prosesses are various and are duveded at present into three types, including catalytic reduction, absorption and adsorption processes, nivertheless economic evaluation based on the commercial flue gas denitrifieation processes has shown that the selective catalytic reduction process used ammonia as the reducing agent is the mosteconomic and mosteffeetive...

This paper expounds and reviews flue gas denitrification processes, removing nitrogen oxide processes from flue gas or exhaust gas. Flue gas denitrification prosesses are various and are duveded at present into three types, including catalytic reduction, absorption and adsorption processes, nivertheless economic evaluation based on the commercial flue gas denitrifieation processes has shown that the selective catalytic reduction process used ammonia as the reducing agent is the mosteconomic and mosteffeetive process of removing nitroge oxides and is up to 90% in the removing nitroge oxide efficiency. As a result of the energy resorce construction is changing, the research and development of the removing nitrogen oxide processes based on wet method will be further speeded up, especially the wet removing simultaneously sulfur and nitrogen oxides.

本文阐述排烟脱硝的方法,即以烟道气或工业废气中净化氮氧化物的方法。排烟脱硝的方法繁多,目前有还原法、吸收法以及吸附法三大类。但是,根据工业化排烟脱硝方法的经济评价得出,应用氨作还原剂选择性催化还原氮氧化物的方法,是脱除氮氧化物最经济和最有效的方法,其脱除氮氧化物的效率高达90%以上。由于能源结构的变化,研究与开发湿法脱除氮氧化物的技术,将进一步加快,尤其是湿法联合脱硫脱硝的技术。

 
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