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Restoration of nitritation of the sewage partial nitritation/anammox (PN/A) proccess using free nitrous acid to treat flocculent sludge [FNA处理絮体污泥恢复城市污水PN/A工艺短程硝化] Scopus CSCD PKU
期刊论文 | 2019 , 39 (8) , 3308-3315 | China Environmental Science
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Abstract :

In order to assess the feasibility of restoring sewage partial nitritation/anammox (PN/A) process using free nitrous acid (FNA) to treat flocculent sludge, the effect of different concentrations of FNA on the activities of ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) was studied. Besides, the variations of nutrient removal performance in the SBR reactor by twice FNA treatment were investigated. The results showed that NOB activity could be inhibited when the flocculent sludge treated by FNA of 0.45mgHNO2-N/L and the nitrite accumulation rate (NAR) reached 88.8%, but NOB activity recovered from the 8th day. While NOB activity could be significantly inhibited when the flocculent sludge treated by FNA of 1.35mgHNO2-N/L, and the NAR reached 89.1%. Meanwhile the activities of AOB was also inhibited, and NH4 +-N conversion rate decreased to 6.8%. By enhancing the ratio of aerobic time to anoxic time (t好/t缺: from 0.4~2.7) and increasing dissolved oxygen (DO: from 0.2~1.5mg/L), the AOB activity recovered, and NH4 +-N conversion rate reached 77.8%. But the activities of NOB was not recovered within 150days, and the NAR achieved 98.1%. With the stable achievement of nitritation, the nitrogen removal performance of the system gradually restored, the average effluent total inorganic nitrogen (TIN) was 8.2mg/L, and the average TIN efficiency was 84.1%. Therefore, the strategy by first treating flocculent sludge with higher FNA to inhibite both AOB and NOB, then increasing t好/t缺 and DO to restore AOB activity, could achieve the restoration of PN/A process. © 2019, Editorial Board of China Environmental Science. All right reserved.

Keyword :

Free nitrous acid; Nitrite oxidizing bacteria; Partial nitritation/anammox; Restoration; Sewage Free nitrous acid; Nitrite oxidizing bacteria; Partial nitritation/anammox; Restoration; Sewage

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GB/T 7714 Wang, Z.-H. , Wang, B. , Gong, X.-F. et al. Restoration of nitritation of the sewage partial nitritation/anammox (PN/A) proccess using free nitrous acid to treat flocculent sludge [FNA处理絮体污泥恢复城市污水PN/A工艺短程硝化] [J]. | China Environmental Science , 2019 , 39 (8) : 3308-3315 .
MLA Wang, Z.-H. et al. "Restoration of nitritation of the sewage partial nitritation/anammox (PN/A) proccess using free nitrous acid to treat flocculent sludge [FNA处理絮体污泥恢复城市污水PN/A工艺短程硝化]" . | China Environmental Science 39 . 8 (2019) : 3308-3315 .
APA Wang, Z.-H. , Wang, B. , Gong, X.-F. , Qiao, X. , Peng, Y.-Z. . Restoration of nitritation of the sewage partial nitritation/anammox (PN/A) proccess using free nitrous acid to treat flocculent sludge [FNA处理絮体污泥恢复城市污水PN/A工艺短程硝化] . | China Environmental Science , 2019 , 39 (8) , 3308-3315 .
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Analysis on the global warming potential of cement concrete pavement in China Scopus
会议论文 | 2015 , 814 , 418-424 | Chinese Materials Congress, CMC 2014
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Abstract :

The global warming of cement concrete pavement from raw material extraction to road construction was analyzed by the method of life cycle assessment. The characterization results showed that the procedure of producing material is the most important stage to emit greenhouse gas and it accounts for 98.5% of the global warming potential that caused by the material production and construction stage. For the materials used in different structure layers, surface layer is the biggest impact of greenhouse and accounts for 68.9% of the total impact caused by material used in constructing pavement. Therefore in the future, by using recycled materials or more environmental materials will be a good way to reduce environment impact. © (2015) Trans Tech Publications, Switzerland.

Keyword :

Cement concrete; Global warming potential (GWP); Life cycle assessment (LCA); Pavement Cement concrete; Global warming potential (GWP); Life cycle assessment (LCA); Pavement

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GB/T 7714 Zhao, L.L. , Wang, Z.H. , Liu, Y. et al. Analysis on the global warming potential of cement concrete pavement in China [C] . 2015 : 418-424 .
MLA Zhao, L.L. et al. "Analysis on the global warming potential of cement concrete pavement in China" . (2015) : 418-424 .
APA Zhao, L.L. , Wang, Z.H. , Liu, Y. , Gong, X.Z. , Gao, F. , Cui, J.P. et al. Analysis on the global warming potential of cement concrete pavement in China . (2015) : 418-424 .
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Seismic performance of FRP confined bridge pier of rectangular hollow section Scopus CSCD PKU
期刊论文 | 2014 , 40 (2) , 214-222 | Journal of Beijing University of Technology
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Abstract :

In order to study on seismic performance of fiber reinforced polymer confined hollow section column of different slenderness ratio, the RC rectangular hollow section columns with slenderness ratio of 4 and 8 were designed. Quasi-static test was carried out to the tested columns, and the failure characteristic, seismic performance and additional moment were analyzed. The experimental result shows that ultimate lateral displacement of FRP confined hollow section columns with slenderness ration of 8 is increased by 16%. However, the maximal lateral force and ultimate lateral force is increased about 5%; pinch-shrinking effect of confined tested column with slenderness ration of 4 is reduced, while the additional moment of confined tested column with slenderness ration of 8 is reduced. Besides, comparing the measured lateral force-displacement of the top of tested columns and rotation deformation-moment of plastic hinge region for FRP confined columns with simulated results, it is shown that the simulated results have good agreement with experimental results.

Keyword :

Bridge pier; Fiber reinforced polymer; Quasi-static test; Rectangular hollow section bridge pier; Seismic performance Bridge pier; Fiber reinforced polymer; Quasi-static test; Rectangular hollow section bridge pier; Seismic performance

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GB/T 7714 Du, X.-L. , Dong, Z.-H. , Han, Q. et al. Seismic performance of FRP confined bridge pier of rectangular hollow section [J]. | Journal of Beijing University of Technology , 2014 , 40 (2) : 214-222 .
MLA Du, X.-L. et al. "Seismic performance of FRP confined bridge pier of rectangular hollow section" . | Journal of Beijing University of Technology 40 . 2 (2014) : 214-222 .
APA Du, X.-L. , Dong, Z.-H. , Han, Q. , Wang, Z.-H. . Seismic performance of FRP confined bridge pier of rectangular hollow section . | Journal of Beijing University of Technology , 2014 , 40 (2) , 214-222 .
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中国能源生产的累计[火用]需求分析 CQVIP CSCD PKU
期刊论文 | 2013 , 39 (11) , 1734-1739 | 北京工业大学学报
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Abstract :

以[火用]理论为基础,结合基于投入产出方法的清单计算模型,计算了我国能源生产的累计[火用]需求,对不同能源产品的累计[火用]需求进行了对比,并分析了高次生产的[火用]消耗在累计[火用]需求中的比例.结果表明:供应1MJ的各能源产品,电力的累计[火用]需求最高,为3.4MJ;其次为炼油产品、焦炭等其他二次能源,为1.55~1.63MJ;初级化石能源最低,为1.18~1.23MJ.与基于流程的清单计算模型相比,基于投入产出方法的清单计算模型更适用于分析能源系统.

Keyword :

生命周期 生命周期 能源 能源 [火用] [火用] 投入产出 投入产出

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GB/T 7714 孙博学 , 聂祚仁 , 高峰 et al. 中国能源生产的累计[火用]需求分析 [J]. | 北京工业大学学报 , 2013 , 39 (11) : 1734-1739 .
MLA 孙博学 et al. "中国能源生产的累计[火用]需求分析" . | 北京工业大学学报 39 . 11 (2013) : 1734-1739 .
APA 孙博学 , 聂祚仁 , 高峰 , 王志宏 , 谢志辉 . 中国能源生产的累计[火用]需求分析 . | 北京工业大学学报 , 2013 , 39 (11) , 1734-1739 .
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α-N(OH)2/SiO2核壳以及α-Ni(OH)2空心微球的制备及表征 CQVIP CSCD PKU
期刊论文 | 2009 , 24 (2) , 345-348 | 无机材料学报
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Abstract :

采用以正硅酸乙酯(TEOS)水解为基础的硅溶胶种子生长法制备了粒径约为270nm的近单分散二氧化硅球型颗粒.采用一种新的溶液生长法,以氢氟酸作为溶液中镍离子配位剂,加入氨水调节溶液pH值的同时作为镍离子补充配位剂,60℃水浴条件下在已制得SiO2微球表面均匀包覆α-Ni(OH)2得到Ni(OH)2/SiO2核壳结构,Ni(OH)2壳层厚度约为35nm.结合多步包覆法提高Ni(OH)2壳层厚度,三次包覆后壳层厚度达到约100nm,四次包覆后约为140nm.采用20wt%的强碱NaOH溶液对三次包覆后的Ni(OH)2/SiO2核壳结构进行处理,得到了壳层厚度约为95nm的α-Ni(OH)2空心微球.空心微球具有较大的比表面积为141.06m2/g.

Keyword :

氢氧化镍 氢氧化镍 核壳 核壳 二氧化硅 二氧化硅 空心微球 空心微球

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GB/T 7714 娄载亮 , 李群艳 , 王志宏 et al. α-N(OH)2/SiO2核壳以及α-Ni(OH)2空心微球的制备及表征 [J]. | 无机材料学报 , 2009 , 24 (2) : 345-348 .
MLA 娄载亮 et al. "α-N(OH)2/SiO2核壳以及α-Ni(OH)2空心微球的制备及表征" . | 无机材料学报 24 . 2 (2009) : 345-348 .
APA 娄载亮 , 李群艳 , 王志宏 , 韦奇 , 聂祚仁 . α-N(OH)2/SiO2核壳以及α-Ni(OH)2空心微球的制备及表征 . | 无机材料学报 , 2009 , 24 (2) , 345-348 .
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Preparation and characterization of nanostructured Ni(OH)2 and NiO thin films by a simple solution growth process EI
期刊论文 | 2008 , 320 (1) , 254-258 | Journal of Colloid and Interface Science
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Abstract :

Nanostructured Ni(OH)2 thin films were prepared by a simple solution growth process with F- and NH3 used as Ni2+ coordination agents, and ammonia hydroxide solution used as OH- supplier to accelerate the hydrolyzation of nickel complex species. The results showed Ni(OH)2 thin films were constructed mainly with hexagonal β - Ni (OH)2 nanorods; the F- and NH3 in reactive solutions played important roles in the film growth process; and solution pH had great influence on the morphologies of thin films, which was explained by the competition of Ni(OH)2 nucleation and growth in solutions. NiO crystallinity thin films were obtained by annealing Ni(OH)2 thin films at 400 °C for 2 h and the morphologies of the Ni(OH)2 thin films were sustained well during the annealed process. © 2007.

Keyword :

pH effects pH effects Nickel compounds Nickel compounds Thin films Thin films Nanostructured materials Nanostructured materials Hydrolysis Hydrolysis

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GB/T 7714 Li, Q.Y. , Wang, R.N. , Nie, Z.R. et al. Preparation and characterization of nanostructured Ni(OH)2 and NiO thin films by a simple solution growth process [J]. | Journal of Colloid and Interface Science , 2008 , 320 (1) : 254-258 .
MLA Li, Q.Y. et al. "Preparation and characterization of nanostructured Ni(OH)2 and NiO thin films by a simple solution growth process" . | Journal of Colloid and Interface Science 320 . 1 (2008) : 254-258 .
APA Li, Q.Y. , Wang, R.N. , Nie, Z.R. , Wang, Z.H. , Wei, Q. . Preparation and characterization of nanostructured Ni(OH)2 and NiO thin films by a simple solution growth process . | Journal of Colloid and Interface Science , 2008 , 320 (1) , 254-258 .
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Effect of La, Ce, Y and B addition on thermal stability of unsupported alumina membranes SCIE
期刊论文 | 2005 , 387 (1-2) , 292-296 | JOURNAL OF ALLOYS AND COMPOUNDS
WoS CC Cited Count: 21
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Abstract :

Phase composition and pore structure of La, Ce, Y and B doped unsupported alumina membranes were investigated by means of X-ray diffraction and N-2 adsorption. The role of La, Ce, Y and B addition in enhancing the thermal stability of alumina membranes is discussed. At temperatures ranging from 800 to 1000 degreesC, La and Y impregnation are more efficient than that of B and Ce to preserve the BET surface area and pore volume. The addition of La can partially stabilize the alumina membranes up to 1200 degreesC by the delay of phase transformation from gamma- to alpha-Al2O3. (C) 2004 Elsevier B.V. All rights reserved.

Keyword :

thermal stability thermal stability alumina membrane alumina membrane phase transformation phase transformation pore structure pore structure

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GB/T 7714 Wei, Q , Chen, ZX , Wang, ZH et al. Effect of La, Ce, Y and B addition on thermal stability of unsupported alumina membranes [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2005 , 387 (1-2) : 292-296 .
MLA Wei, Q et al. "Effect of La, Ce, Y and B addition on thermal stability of unsupported alumina membranes" . | JOURNAL OF ALLOYS AND COMPOUNDS 387 . 1-2 (2005) : 292-296 .
APA Wei, Q , Chen, ZX , Wang, ZH , Hao, YL , Zou, JX , Nie, ZR . Effect of La, Ce, Y and B addition on thermal stability of unsupported alumina membranes . | JOURNAL OF ALLOYS AND COMPOUNDS , 2005 , 387 (1-2) , 292-296 .
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Study of control strategy and simulation in anoxic-oxic nitrogen removal process SCIE CSCD
期刊论文 | 2005 , 17 (3) , 425-428 | JOURNAL OF ENVIRONMENTAL SCIENCES
WoS CC Cited Count: 2
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Abstract :

The control strategy and simulation of external carbon addition were specially studied in an anoxic-oxic (A/O) process with low carbon: nitrogen (C/N) domestic wastewater. The control strategy aimed to adjust the flow rate of external carbon dosage to the anoxic zone, thus the concentration of nitrate plus nitrite (NOx(-) -N) in the anoxic zone was kept closed to the set point. The relationship was studied between the NOx(-) -N concentration in the anoxic zone (S-NO) and the dosage of external carbon, and the results showed that the removal efficiency of the total nitrogen (TN) could not be largely improved by double dosage of carbon source when S-NO reached about 2 mg/L. Through keeping S-NO at the level of about 2 mg/L, the demand of effluent quality could be met and the carbon dosage could be optimized. Based on the Activated Sludge Model No. 1 (ASM No. 1), a simplified mathematical model of external carbon dosage was developed. Simulation results showed that PI controller and feed-forward PI controller both had good dynamic response and steady precision. And feed-forward PI controller had better control effects due to its consideration of influent disturbances.

Keyword :

biological nitrogen removal biological nitrogen removal external carbon addition external carbon addition feed-forward PI control feed-forward PI control ASM No. 1 ASM No. 1

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GB/T 7714 Peng, YZ , Wang, ZH , Wang, SY . Study of control strategy and simulation in anoxic-oxic nitrogen removal process [J]. | JOURNAL OF ENVIRONMENTAL SCIENCES , 2005 , 17 (3) : 425-428 .
MLA Peng, YZ et al. "Study of control strategy and simulation in anoxic-oxic nitrogen removal process" . | JOURNAL OF ENVIRONMENTAL SCIENCES 17 . 3 (2005) : 425-428 .
APA Peng, YZ , Wang, ZH , Wang, SY . Study of control strategy and simulation in anoxic-oxic nitrogen removal process . | JOURNAL OF ENVIRONMENTAL SCIENCES , 2005 , 17 (3) , 425-428 .
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