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Effect of HRT and Temperature on the Start of Biological Fluidized Bed (BFB) for Purification of Marine Aquaculture Wastewater

Li Zhiyuan, Fan Jize, Liu Ying, Xiao Jingni

Abstract （473）

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In order to study the rapid start⁃up of biofilters in seawater recirculating aquaculture systems, this study investigated the removal effects of seawater biological fluidized bed on pollutants under different hydraulic retention time (HRT) and temperature conditions, and explored the impact on initiation of seawater biological fluidized bed. The results show that: HRT=1 h experimental group can achieve material conversion and return to equilibrium more quickly, which is suitable for membrane loading; the high temperature conditions (28 ℃) are suitable for fluidized bed initiation, and the biofilm attachment growth can be observed more quickly.

2020, 40 (1): 10-14. DOI: 10.3969/j.issn.1672-6952.2020.01.002

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Preparation of Hβ/OMC and Adsorption Desulfurization

Qi Yuhuan，Li Jian，Liu Yingying，Yang Lina，Yao Li，Shi Zhewen

Abstract （532）

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The composite material Hβ/OMC containing the mesoporous carbon (OMC) and Hβ zeolite was synthesized. This composite was characterized with XRD, BET, FITR, SEM and TEM. The adsorption desulfurization performance of Hβ/OMC was investigated with benzothiophene (BT) as the probe molecule. The adsorption thermodynamics and kinetics of the BT on Hβ/OMC were studied. The characterization results showed that Hβ/OMC has the micro⁃mesoporous hierarchical pore structure, its specific surface area, pore volume and pore diameter are all higher than those of OMC. The saturated sulfur capacity of BT on Hβ/OMC is higher than OMC. Compared with Freundlich adsorption isotherm model, the adsorption of BT on Hβ/OMC is more consistent with Langmuir model. The adsorption of BT on Hβ/OMC is a process of spontaneous, exothermic and degree of confusion reduction, which is described better by pseudo⁃two⁃kinetic equations than pseudo⁃one⁃kinetic equations.

2019, 39 (6): 15-20. DOI: 10.3969/j.issn.1672-6952.2019.06.003

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Research of Adsorption Desulfurization by Using Metal Modified Mesoporous Carbon

Zhang Zhifang， Li Jian， Liu Yingying， Yang Lina

Abstract （535）

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Mesoporous carbon was prepared by loading four different metal ions Ag+/MC, Zn2+/MC, Cu2+/MC, and Fe3+/MC by impregnation method using mesoporous carbon (MC) as the carrier.The influence of the loading quality and the species of the metal ions on the adsorption were investigated.The results show that the adsorption capacity of two thiophene (DBT) can be improved by loading Ag+, Zn2+, Cu2+ and Fe3+ on the surface of mesoporous carbon.The optimum adsorption efficiency of mesoporous carbon with different metals is compared. The order of adsorption capacity of DBT is Ag+/MC>Zn2+/MC>Cu2+/MC>Fe3+/MC. Among them, the adsorption efficiency of loading 10% Ag+ on the mesoporous carbon is best. Compared with the untreated mesoporous carbon sulfur saturation capacity increases 1.11 mg/g, through the sulfur capacity also rises 1.93 mg/g.

2017, 37 (4): 6-10. DOI: 10.3969/j.issn.1672-6952.2017.04.002

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Influence of Government-Licensed Private Equity onTarget Enterprises' Financial Performance

LIU Ying-hua

Abstract （411）

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A set of indicators for financial perforemance appraisal was builded by combining PE with target enterprises.Applying T test and non-parametric test,three-year financial perforemance before IPO for target enterprises invested by PE was compared between government-licensed PE and non-government-licensed PE.And the investment behavior between the tow types of PE was compared in order to understand the reasons for generating differences.The empirical research show that the dual nature of investment objectives for government-licensed PE had an active role in front-end investment and later period supervision .In order to make government more effectively guide investment, syndication should be encuraged and spreaded.

2011, 31 (2): 65-72. DOI: 10.3696/j.issn.1672-6952.2011.02.018

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Vacuum Checking of Liquefied Petroleum Accumulator Pot

MA Chun -rong,LIU Ying

Abstract （328）

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Vacuum checking problems under the different working environments were analyzed in the design process of liquefied petroleum accumulator pot .With computing different media and inner diameters o f pots , a rule whether a liquefied petroleum pot filled with propylene, propane , butane and butylenes could be checked according to vacuum condition in the low temperature w as found .By comparing thickness of inner -press and outside -press barrel w all, it' s concluded that the larger the saturated stream press of liquefied petroleum gas is, the smaller the probability of vacuum check is.On the contrary , the smaller the saturated stream press of liquefied petroleum gas is, the larger the probability of vacuum checking is.Therefore , the conclusion helps reduce the unnecessary checking , increase the designing efficiency , and shorten the product design period .

2005, 25 (2): 63-64.