亚硝化

pH值对高氨氮废水亚硝化/反亚硝化速率的影响

Effect of pH Value on Nitrosation / Denitrosation Rate for Wastewater Containing High Ammonia Nitrogen

以丙二酸二乙酯和盐酸胍为起始原料，经环合、亚硝化、还原、氯化、水解得到2-氨基4,6-二氯-5-甲酰氨基嘧啶，总收率20%，其结构经1HNMR和IR表征。

N - ( 2-amino-4,6-dichloro-5-pyrimidinyl ) formamide was synthesized from diethyl malonate and guanidine hydrochloride via cyclization , nitrosation , reduction , chloridization , hydrolysis with an overall yield of 20 % . The structure was characterized by 1H NMR and IR .

应用竞争PCR方法检测亚硝化细菌的研究

The Research of Detection Method to Nitrite Bacteria by Competitive PCR

本研究条件下，影响氨氮降解和亚硝化的主要因子是pH和溶解氧（DO）。

The chief factors effecting nitrification via nitrate included pH and diffluent oxygen ( DO ) .

相关分析提示维生素C并非茶叶阻断亚硝化的主要成分。

Thestatistics study showed that vitamin C was not the main constituent of Maojiantea in blocking the DMN formation in vitro .

pH值为6.5~8.5适宜亚硝化细菌的生长；

Maintaining the pH between 6.5 ~ 8.5 is suitable for the growth of ammonium oxidation bacteria .

N，N－二甲基苯胺的亚硝化反应在一定酸度（pH≤4.70）条件下发生。

When the reaction of N , N-dimethyl aniline with the requirments of nitrite at different acidity , there are three products .

检测了甲霜灵在不同浓度、施入土壤后不同时间对亚硝化细菌和硝化细菌数量的影响及土壤pH值和硝化强度的变化。

The number of nitrosobacteria , nitrobacteria , pH and nitrifying capacity of soil were determined in 4-10 weeks after application of Metalaxyl .

随后在生物膜外层接种驯养好的亚硝化污泥，运行CANON工艺。

Then , the biofilm was inoculated with nitrifying biomass to run the CANON process .

同时，考察了不同HRT下高效反应器的处理效果，探讨了pH对反应器内发生的短程硝化效果的影响以及亚硝化菌对游离氨浓度的适应性。

The questions about the effect of pH on shortcut nitrification and the adaptivity of nitrite-oxidizing bacteria to the free ammonia were also discussed .

其中，中温、高TIC浓度的启动方式为今后低基质浓度的亚硝化反应器的快速启动提供了参考与借鉴。

The startup mode of high TIC and mild temperature provided a reference for the quick startup of sub-nitrifying of low substrate concentration domestic sewage .

结果表明，影响硝化类型的主要制约因素是游离氨，通过pH调节来控制游离氨可获得稳定的亚硝化型硝化。

It has been shown from the experimental results that free ammonium is the primary restrictive factor of nitrification , that stable nitrosification can be attained by pH adjustment for the control of free ammonia .

采用活性污泥法SBR工艺研究低C/N含氮污水实现亚硝化要求的适宜pH值和游离氨（FA）浓度。

Through an activated sludge SBR reactor , the authors study the influence of FA concentration and pH on the partial nitrification of low C / N nitric wastewater .

用SDS-直接法提取的总DNA建立的富集液16Srdna克隆文库中，氨氧化细菌群落结构较为单一，以亚硝化单胞菌为主。

Results also showed Nitrosomonas sp. was dominant phylotype in the library constructed with 16S rDNA PCR amplification from enrichment culture DNA extracted by direct extraction method .

本课题主要考察了CANNED工艺（亚硝化/电化学生物反硝化全自养脱氮）电化学生物反硝化反应器的脱氮效能。

In this paper , the nitrogen removal efficiency of bio-electrochemical denitrification part of CANNED ( Complete Autotrophic Nitrite-nitrification and Electrochemical Bio-denitrification Combined Process ) was studied .

在氮杂环亚硝化反应中，重点考察了反应中的温度、pH及浓度的影响，反应几乎等量进行，收率达到99.5%。

In the nitrosation reaction , the emphasis was placed on investigating the influences of temperature , pH and concentration . The reaction was preceded almost at equivalent amount and the yield can be as high as 99.5 % .

通过添加NOB选择性抑制剂（氯酸钾或羟胺）培养亚硝化颗粒污泥。

Aerobic nitrosifying granules are cultured by dosing NOB-selective inhibitors ( chlorate and hydroxylamine ) .

但与MBR相比，CAS中硝化菌数量少32%，亚硝化菌的数量少35%，异养菌数量少24%。

Compared to the MBR , the average numbers of ammonia-oxidizing bacteria , nitrite-oxidizing bacteria and heterotrophic bacteria were 32 % , 35 % and 24 % fewer in the CAS , respectively .

明确SFSBR中颗粒污泥稳定运行、亚硝化稳定维持和N2O减量化的关键工艺条件，对于新工艺更好的实际应用并实现节能减排具有重要的意义。

It is of great significance for better practical application of the new technology and to achieve energy conservation .

在0.6mol/L盐酸中，甲基橙与NO-2的亚硝化反应产物在极谱仪上于-0.31V（vs.SCE）可获得灵敏的极谱波。

The nitrosation product can produce a sensitive polarographic wave at - 0 31V .

MBR系统中污泥的亚硝化、反硝化作用均呈零级反应，对应降解速率常数分别约为传统活性污泥的2.2倍和2.5倍；MBR中硝化作用规律不明显。

Both ammonium-oxidizing and denitrifying reaction in MBR accord to zero-grade reaction formula , and the corresponding degradation rate constant was 2.2 and 2.5 times respectively over CAS . The nitrifying rule is not obvious in MBR .

以N乙基间苯甲胺为主要原料，通过羟乙基化、亚硝化、还原和成盐等步骤得到性能合格的成品，合成彩色显影剂CD4，总收率达到60%以上。

Qualified color developing agent CD 4 , 3 methyl 4 amino N ethyl N (β hydroxyethyl ) aniline sulfate , is synthesized by hydroxyethylation , nitrosation , reduction and salt forming using 3 methyl aniline as raw material . The total product yield can reach over 60 % .

光学显微镜和扫描电镜观察结果表明，亚硝化菌以球状菌为主，从细菌形态看，可能是亚硝化球菌属（Nitrosococcus）。

The observation results of optical microscope and SEM showed that , dominant nitrococcus could be spherical bacteria ( Nitrosococcus ) .

用亚硝化培养基从底泥中分离了NH4-N降解优势菌20株，经鉴定，分别为Bacillus、节杆菌属（Arthrobacter）、Pseudomonas、Xanthomonas、Nitrosococcus和Nitrobacter等6个属。

And 20 strains of dominant bacteria have been separated from bottom mud with nitrosation , and identified as 6 classes , such as : Bacillus , Arthrobacter , Pseudomonas , Xanthomonas , Nitrosococcus and Nitrobacter .

通过上述大量试验研究表明：（1）低C/N低浓度氨氮废水采用活性污泥法BR工艺，可实现稳定的生物亚硝化，但系统不能长期稳定。

Through a number of foregoing research , we can get that : ( 1 ) BR activated sludge nitrous nitrification system with low C / N low nitrogen concentration nitric wastewater can realize biological nitrous nitrifying , but it can not be long term stable .

保持反应时间为6.0h，曝气量800ml/min，短程硝化稳定运行了114个周期，达到了很高的NH4~+-N降解率及亚硝化积累率。

The system was operated stably for 114 cycles at reaction time : 6.0 h , aeration rate : 800 ml / min. The NH_4 ~ + - N removal efficiency and NO_2 ~ & N accumulation ratio could reach 83.6 % and 97.2 % , respectively .

高浓度氨氮废水实现稳定亚硝化宜采用ANIS反应工艺（连续进水、间歇出水），反应器每周期进、出水量仅为其反应容积的一半。

High concentration nitric wastewater can realize stable nitrous nitrification by ANIS process ( continually influence 、 intermittently decantation ), the influence and decant volume of the reactor is only half of its volume .

处理无机含氨氮废水的生物膜优势硝化菌是亚硝化单胞菌群（Nitrosomonas）、亚硝化螺菌群（Nitrosospira）和硝化螺菌（Nitrospira），三者数量占总菌数的60%以上。

The microscopic images revealed that Nitrosomonas , Nitrosospira and Nitrospira were dominant nitrifying bacteria in the biofilm treating the inorganic ammonium wastewater and occupied above 60 % of the total bacteria number .

此外，对这两株细菌的降解产物进行分析后，可初步确定N-2为亚硝化细菌，而P-3为反硝化除磷菌，具有反硝化和除磷的双重作用。

In addition , after analysis the degradation products of these two bacterial , we can determine that N-2 is a nitrosation bacteria , and P-3 is a denitrifying phosphorus removing bacteria , it has the role of denitrification and phosphorus removal .

甘草黄酮提取条件的优化及抑制亚硝化反应的研究

Study on the extraction of licorice flavonoid and inhibiting nitrosamine reaction