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Chinese Journal of Chemical Engineering 2012年第4期20卷 754-759页

作者：李文军吴笛石鑫文利雄邵磊 State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Chemical Industry Productivity Promotion Center of China

A simple and efficient sonochemical method was developed for the degradation of organic matter and ammonia nitrogen in azodicarbonamide *** effects of initial pH,ultrasound format and peripheral water level on the sonolysis of hydrazine,urea,COD and ammonia nitrogen were *** is found that the initial pH has a significant influence on the degradation of hydrazine and ammonia nitrogen,whereas this impact to urea is relatively *** also shows that a noticeable enhancement of ammonia nitrogen removal could be achieved in a proper intermittent ultrasound operation mode,i.e.,1/1 min on/off *** height difference between the periph-eral water level and the inner water level of the flask affects the efficiency of ultrasonic treatment as well.

关键词： azodicarbonamide wastewater organic matter ammonia nitrogen ultrasound radiation hydrogen peroxide

Thermal decomposition of magnesium ammonium phosphate and adsorption properties of its pyrolysis products toward ammonia nitrogen

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Transactions of Nonferrous Metals Society of China 2015年第2期25卷 497-503页

作者：陈益清唐建军李文龙钟振辉尹娟深圳职业技术学院深圳市工业节水与城市污水资源化技术重点实验室深圳518055 广州大学土木工程学院广州510006

High-purity magnesium ammonium phosphate （MAP） was precipitated by controlling pH value of the reaction system of 9.0-9.5. The thermal decomposition behavior of MAP and the adsorption properties of its pyrolysis products toward ammonia-nitrogen were also studied by XRD, SEM, TGA-DTA and FT-IR methods. The results indicated that high-purity MAP was obtained at pH value of 9.0-9.5. Upon heating to 100-120℃ for 120 min, MAP was thermally decomposed, losing water and ammonia concomitantly with a reduction in grain size and crystallinity. The capacity of pyrolysis products for ammonia nitrogen adsorption reached 72.5 mg/g, with a removal rate of up to 95% from an 800 mg/L solution. The characteristic diffraction peaks corresponding to MAP mainly appeared in their XRD patterns after adsorption of ammonia nitrogen. The pyrolysis products of MAP at 100-120 ℃ could be recycling-used as the chemical treatment regents of ammonia nitrogen in the practical application.

关键词： magnesium ammonium phosphate magnesium hydrogen phosphate thermal decomposition ammonia nitrogen adsorption properties

Evaluation of the correlation between ammonia nitrogen and p-toluidine using sequencing batch reactor treating synthetic p-toluidine wastewater

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Journal of Environmental Sciences 2006年第2期18卷 259-262页

作者： ZHANG Bo CHEN Jin-long WANG Fan ZHANG Wei-ming ZHANG Quan-xing Department of Environmental Engineering Nanjing University Nanjing 210093 China

This paper presents lab-scale experiment carried out to evaluate the correlation between ammonia nitrogen （NH3-N） and p-toluidine using sequencing batch reactor treating synthetic p-toluidine wastewater. The profiles of NH3-N and p-toluidine were traced under the concentration of sucrose in the influent varied from 0 to 500 mg/L, aerated airflow varied from 0.6 to 1.2 L/min and temperature varied from 10 to 25℃, respectively. The results showed that the concentration of NH3-N turned from increase to decrease when p-toluidine was nearly completely biodegraded, so the profile of NH3-N could clearly indicate the endpoint of p-toluidine biodegradation. And the profile of NH3-N was not influenced by the sucrose in the influent, aerated airflow and temperature. It is showed that using ammonia nitrogen as monitoring and control parameter is feasible and reliable and has promising application in amine wastewater treatment by SBR.

关键词： sequencing batch reactor correlation ammonia nitrogen p-toluidine biodegradation

Inhibitory effect of ammonia nitrogen on specific methanogenic activity of anaerobic granular sludge

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Journal of Central South University of Technology 2006年第1期13卷 63-67页

作者：周洪波邱冠周 School of Minerals Processing and Bioengineering Central South University Changsha 410083 China

A series of batch experiments were conducted in 125 mL serum bottles to assess the toxicity of different concentrations of ammonia nitrogen to the specific methanogenic activity of anaerobic granular sludge from upflow anaerobic sludge bed（UASB） and expanded granular sludge bed（EGSB） reactors. The effects of pH value and temperature on toxicity of ammonia nitrogen to anaerobes were investigated. The results show that the specific methanogenic activity of anaerobic granular sludge suffers inhibition from ammonia nitrogen, the concentrations of ammonia nitrogen that produce 50 % inhibition of specific methanogenic activity for sludge from UASB and EGSB reactor are 2.35 and 2.75 g/L, respectively. Hydrogen utilizing methanogens suffers less inhibition from ammonia mtrogen than that of acetate utilizing methanogens. Hydrogen-producing acetogens that utilize propionate and butyrate as substrates suffer serious inhibition from ammonia nitrogen. The toxicity of ammonia nitrogen to anaerobic granular sludge enhances when pH value and temperature increase. Anaerobic granular sludge can bear higher concentrations of ammonia nitrogen after being acclimated by ammonia nitrogen for 7 d.

关键词： ammonia nitrogen toxicity anaerobic granular sludge specific methanogenic activity

Transcriptomics reveals the effect of ammonia nitrogen concentration on Pseudomonas stutzeri F2 assimilation and the analysis of amtB function

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Synthetic and Systems Biotechnology 2023年第2期8卷 262-272页

作者： Wei-lai Fu Pei-feng Duan Qiang Wang Ya-xin Liao Yun-shuang Wang Mei-juan Xu Hui-hui Jiang Xian Zhang Zhi-ming Rao The Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi214122PR China The Key Laboratory of Functional Aquafeed and Culture Environment Control Fujian DBN Huayou Aquatic Science and Technology Co.LtdZhangzhou363500PR China School of Biological and Environmental Engineering Chaohu UniversityHefei238024PR China

The biological treatment of wastewater with high concentrations of ammonia nitrogen has become a hot research issue,but there are limited reports on the mechanism of ammonia nitrogen utilization by *** this paper,a transcriptomic approach was used to investigate the differences in gene expression at 500.0 mg/L(Amo 500)and 100.0 mg/L(Amo 100)ammonium concentrations to reveal the mechanism of ammonia nitrogen removal from water by Pseudomonas stutzeri *** transcriptome data showed 1015(459 up-regulated and 556 down-regulated)differentially expressed genes with functional gene annotation related to nitrogen source metabolism,glycolysis,tricarboxylic acid cycle,extracellular polysaccharide synthesis,energy conversion and transmembrane transport,revealing the metabolic process of ammonium nitrogen conversion to biological ni-trogen in *** F2 through *** verify the effect of ammonium transporter protein(AmtB)of cell membrane on assimilation,a *** F2-ΔamtB mutant strain was obtained by constructing a knockout plasmid(pK18mobsacB-ΔamtB),and it was found that the growth characteristics and ammonium removal rate of the mutant strain were significantly reduced at high ammonium *** carbon source components and dissolved oxygen conditions were optimized after analyzing the transcriptome data,and the ammonium removal rate was increased from 41.23%to 94.92%with 500.0 mg/L ammonium *** study of *** F2 transcript level reveals the mechanism of ammonia nitrogen influence on microbial assimilation process and improvement strategy,which provides a new strategy for the treatment of ammonia nitrogen wastewater.

关键词： ammonia nitrogen Pseudomonas stutzeri F2 Transcriptomic Assimilation amtB

Characterization of Bacillus subtilis Ab03 for efficient ammonia nitrogen removal

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Systems Microbiology and Biomanufacturing 2022年第3期2卷 580-588页

作者： Qiang Wang Weilai Fu Ruiqi Lu Chunli Pan Ganfeng Yi Xian Zhang Zhiming Rao Jiangnan University WuxiJiangsu ProvinceChina Fujian DBN Aquatic Science and Technology CO.LTD Zhao-AnChina

An efficient ammonia nitrogen degrading bacterial strain was isolated from a fish and shrimp pond and identified as Bacillus subtilis(Ab03).Firstly,the strain was continuously domesticated in ammonium solution to improve its nitrogen removal *** performance of the strain in terms of nitrogen removal efficiency under different culture conditions was then ***,the nitrogen removal process and related strain mechanisms were analyzed by nitrogen *** results showed the strain Ab03 could remove 91.67% of NH_(4)^(+)-N at 300 mg/L under the conditions of glucose as the single carbon source,C/N of 15,pH of 7.5,the temperature of 35℃ and dissolved oxygen of 7-8 mg/*** was also found that under conditions where ammonia nitrogen was the only nitrogen source,strain Ab03 could also undergo aerobic denitrification for simultaneous conversion,with a final gas conversion rate of 74.81%.

关键词： Bacillus subtilis ammonia nitrogen nitrogen balance Simultaneous conversion

Change in genotoxicity of wastewater during chlorine dioxide and chlorine disinfections and the influence of ammonia nitrogen

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Frontiers of Environmental Science & Engineering 2007年第1期1卷 18-22页

作者： WANG Lisha HU Hongying WANG Chao Koichi Fujie Environmental Simulation and Pollution Control State Key Joint Laboratory Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China Department of Ecological Engineering Toyohashi University of TechnologyToyohashiJapan

The effects of chlorine dioxide and chlorine disinfections on the genotoxicity of different biologically treated sewage wastewater samples were studied by *** experiment results showed that when chlorine dioxide dosage was increased from 0 to 30 mg/L,the genotoxicity of wastewater first decreased rapidly and then tended to be stable,while when the chlorine dosage was increased from 0 to 30 mg/L,the genotoxicity of wastewater changed diver sely for different *** was then found that ammonia nitro-gen did not affect the change of genotoxicity during chlorine dioxide disinfection of wastewater,while it greatly affected the change of genotoxicity during chlorine disin fection of *** the concentration of ammonia nitrogen was low(ammonia nitrogen was high(>10-20 mg/L),the genotoxicity of wastewater increased after chlorine disinfection.

关键词： wastewater reuse chlorine dioxide disinfection chlorine disinfection genotoxicity ammonia nitrogen

The Method of Fast on-site Detection and Real-time Release of ammonia nitrogen in Water

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Chinese Journal of Biomedical Engineering(English Edition) 2019年第3期28卷 125-131页

作者： MA Xin-hua OU Guo-rong Tianjin Institute of Hygiene and Environmental Medicine Tianjin 300050China

Objective:This paper aims to establish a simple and practical method for the rapid detection of ammonia nitrogen in water on the spot,and to transmit the detection results to the Internet via GSM network,and to publish and update them in real ***:Phenol salt colorimetry was used to measure the absorbance value of indigo phenol blue,the product of the reaction between ammonia nitrogen and phenol salt in water samples,using sodium nitrosoferricyanide sodium hydroxide as catalyst and a microphotoelectric colorimetric instrument developed by ourselves,or a simple visual colorimetric semi-quantitative method was used to measure the ammonia nitrogen content in water ***,the general GSM wireless communication module built in the microphotoelectric colorimeter was used to realize the remote transmission of the test result data and the real-time update and release on the ***:The results of this method showed that the correlation of the method was significant,and the precision and accuracy were similar to the national standard Nessler's reagent *** relative standard deviation is 4.4%,and the relative error is 2.7%.In 5-10 min,the detection of ammonia and nitrogen in single water sample can be completed on site,and the results can be *** quantitative and semi-quantitative detection,the lowest detection concentrations are 0.05 mg/L and 0.2 mg/L,respectively,which are basically free from the interference of pH and common *** the coverage area of GSM network,the wireless transmission of data results was unobstructed and delayed,and the effect was ***:The method is simple,rapid,practical and reliable,which is suitable for the field rapid determination of ammonia nitrogen in water,and the real-time remote transmission of the detection *** provides a high-efficiency,low-cost and simple technical means for the field water quality monitoring and the rapid acquisition of water quality data.

关键词： ammonia nitrogen environmental water pollution rapid detection data real-time release

Analysis of ammonia nitrogen Content in Water Based on Weighted Least Squares Support Vector Machine (WLSSVM) Algorithm

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Journal of Software Engineering and Applications 2016年第2期9卷 45-51页

作者： Jinwu Ju Lanying Wang School of Computer Science of Sichuan University of Science and Engineering Zigong China

Determination of ammonia nitrogen content in water is the basic item of the environmental water pollution, and is the key index to evaluate the water quality. This article designs a water quality monitoring system based on the on-line automatic ammonia nitrogen monitoring system, and establishes a forecasting model based on the weighted least squares support vector machine algorithm. The weighted least squares support vector machine algorithm increases the weight parameter setting, improves the speed and accuracy of prediction learning, and improves the robustness. In this article, a comparison between neural network model and weighted least square support vector machine model is made, which shows that the weighted least squares support vector machine model has better prediction accuracy.

关键词： Support Vector Machine Water Quality ammonia nitrogen Forecasting Model

Effect of Water ammonia nitrogen Concentration on Survival of Mosquitofish Gambusia affinis

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Journal of Water Resource and Protection 2016年第4期8卷 435-437页

作者： Jinqing Wang Weiguang Lü Xiaobin Tao Hanlin Zhang Shuangxi Li Xianqing Zheng Wenzong Zhou Eco-Environmental Protection Institute of Shanghai Academy of Agricultural Sciences Shanghai China Shanghai Langbo Ecological Agriculture Technology Co. Ltd Shanghai China

In this study, the relationship of the growth of invasion fish with water eutrophication processes was explored in Yangtze estuary, China. High water ammonia nitrogen concentration produced high effects on the growth and survival of mosquitofish Gambusia affinis. When the ammonia nitrogen was higher than 51.75 mg/l, the fish death rate obviously increased with days, and at the 4th day fish presented the highest mortality, while 23.72 mg/l ammonia nitrogen conditions have been able to ensure fish survival for two days in experiment treatment. Therefore, ammonia nitrogen of Grade V polluted water (national water quality criteria) is just 3 mg/l, and the water can be enough to support fish normal survival. Our results suggest mosquitofish was a suitable pioneer species for restoring polluted water ecology and purify water.

关键词： Water Pollution ammonia nitrogen Mosquitofish Gambusia affinis Eutrophication