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Anaerobic digestion of kitchen wastes in a single-phased anaerobic sequencing batch reactor(ASBR) with gas-phased absorb of CO_2

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Journal of Environmental Sciences 2005年第2期17卷 249-255页

作者： zhangbo HEZheng-guang zhangli-li XUJian-bo SHIHong-zhuan caiwei-min SchoolofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China SchoolofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China／／HarbinInstituteofTechnologyHarbin150001China

The performance of the single-stage anaerobic digestion of kitchen wastes was investigated in an anaerobic sequencing batch reactor(ASBR) with gas-phased absorb of CO 2. The ASBR was operated at four chemical oxygen demand(COD) loading rates, 2.8, 5.1, 6.2 and 8.4 g/(L·d) respectively. The COD loading rate was increased with the TS concentration and HRT changing. At maximum COD loading rate of 8.4 g/(L·d), the COD, total solid(TS) removal rate and methane gas yield were 69%, 68% and 2.5 L/(L·d) respectively. The operation of the reactor with gas-phased absorb of CO 2 was stable in spite of the low pH(2.6—3.9) and high concentration of TS(142 g/L) of input mixture. The output volatile fatty acid(VFA) concentration was between 2.7—4.7 g/L and had no inhibition on the methanogenic microorganism. The reactor without gas-phased absorb of CO 2 became acidified when the total COD loading rate was increased to 5.1 g/(L·d). Stoichiometry of the methanogenesis for kitchen wastes showed a considerable amount of alkaline will be required to keep pH in the appropriate range for the methanogenic microorganism based on theoretical calculation. Gas-phased absorb of CO 2 effectively reduced the alkaline consumption, hence avoided excessive cation into the reactor.

关键词： kitchen wastes methanogenesis gas-phased CO 2

Kinetics study on catalytic wet air oxidation of phenol by several metal oxide catalysts

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Journal of Environmental Sciences 2004年第4期16卷 556-558页

作者： WANJia-feng fengYu-jie caiwei-min YANGShao-xia SUNXiao-jun SchoolofMunicipalandEnvironmentalEngineering HarbinInstituteofTechnologyHarbin150001China SchoolofEnvironmentalScienceandTechnology ShanghaiJiaotongUniversityShanghai200240China SchoolofChemistryandEnvironmentalEngineering HarbinUniversityofScienceandTechnologyHarbin150080China

Four metal oxide catalysts composed of copper(Cu), stannum(Sn), copper-stannum(Cu-Sn) and copper-cerium(Cu-Ce) respectively were prepared by the co-impregnation method, and γ-alumina(γ-Al 2O 3) is selected as support. A first-order kinetics model was established to study the catalytic wet air oxidation of phenol at different temperature when these catalysts were used. The model simulations are good agreement with present experimental data. Results showed that the reaction rate constants can be significantly increased when catalysts were used, and the catalyst of 6% Cu—10%Ce/γ-Al 2O 3 showed the best catalytic activity. This is consistent with the result of catalytic wet air oxidation of phenol and the COD removal can be arrived at 98.2% at temperature 210℃, oxygen partial pressure 3 MPa and reaction time 30 min. The activation energies of each reaction with different catalysts are nearly equal, which is found to be about 42 kJ/mol and the reaction in this study is proved to be kinetics control.

关键词： catalytic wet air oxidation catalyst phenol

Characteristics of aerobic granules grown on glucose a sequential batch shaking reactor

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Journal of Environmental Sciences 2004年第4期16卷 624-626页

作者： CAIChun-guang ZHUNan-wen liUJun-shen WANGZhen-peng caiwei-min SchoolofCivilandEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China DepartmentofEnvironmentalScienceandEngineering HarbinInstituteofTechnologyHarbin150090China

Aerobic heterotrophic granular sludge was cultivated in a sequencing batch shaking reactor(SBSR) in which a synthetic wastewater containing glucose as carbon source was fed. The characteristics of the aerobic granules were investigated. Compared with the conventional activated sludge flocs, the aerobic granules exhibit excellent physical characteristics in terms of settleability, size, shape, biomass density, and physical strength. Scanning electron micrographs revealed that in mature granules little filamentous bacteria could be found, rod-shaped and coccoid bacteria were the dominant microorganisms.

关键词： aerobic granulation sequential batch reactor granule characteristics

Effects of nutrients on Microcystis growth more easily forming bloom

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Journal of Environmental Sciences 2004年第6期16卷 934-937页

作者： OUming-ming ZHOUBao-xue XIEWei-jie JIANGJu-hui caiwei-min DepartmentofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China

Different nutrient media experimentally were N, P and Fe-limited conditions and a serial of diluted BG11 media. The cell change of morphology and life history, cell number, cell color and cell area of Microcystis were analyzed quantitatively. First, the effects of nitrogen, phosphorus and iron depletion were distinctively different. Phosphorus and iron depletion caused more special division cells, slowly growth increasing, the easier change of bigger cell area. Second, the nitrogen and iron depletion could make the color of alga from green to brown. Finally, according to the resource competition and Monod equation, Microcystis kinetics of phosphorus and iron were also examined. K s and μ max of phosphorus absorption were 0.0352 μmol/L, 0.493 d -1 respectively; iron absorption: 0.00323 μmol/L, 0.483 d -1. In a word, some evidences of the Microcystis bloom dominance in certain nutrient conditions were indicated in the experiments. The dominances were determined as the reviving under the adverse circumstances through the special division, the various nitrogen resources, and the lower kinetics of phosphorus and iron than that of most of other algae. The conclusions provided the scientific basis for preventing and managing Microcystis bloom in freshwater.

关键词： Microcystis diluted BG11 media nitrogen, phosphorus iron depletion dynamics

Visible light induced photodegradation of organic pollutants on nitrogen and fluorine co-doped TiO_2 photocatalyst

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Journal of Environmental Sciences 2005年第1期17卷 76-80页

作者： WANGZheng-peng XUJun caiwei-min ZHOUBao-xue HEZheng-guang CAIChun-guang HONGXiao-ting SchoolofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China

The nitrogen and fluorine co doped TiO 2 polycrystalline powder was synthesized by calcinations of the hydrolysis product of tetra butyl titanate with ammonium fluoride. Nitrogen and fluorine co doping causes the absorption edge of TiO 2 to shift to a lower energy region. The photocatalytic activity of co doped TiO 2 with anatase phases was found to be 2 4 times higher than that of the commercial TiO 2 photocatalyst Degussa P25 for phenol decomposition under visible light irradiation. The co doped TiO 2 powders only contain anatase phases even at 1000℃. Apparently, ammonium fluoride added retarded phase transformation of the TiO 2 powders from anatase to rutile. The substitutional fluorine and interstitial nitrogen atoms in co doped TiO 2 polycrystalline powder were responsible for the vis light response and caused the absorption edge of TiO 2 to shift to a lower energy region.

关键词： photocatalyst visible light nitrogen and fluorine co-doped phenol band gap

Paleogene geological framework and tectonic evolution of the central anticlinal zone in Lufeng 13 sag,Pearl River Mouth Basin

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Petroleum Research 2019年第3期4卷 238-249页

作者： Xudong Wang Xiangtao Zhang Heming lin Xiaoming Que Yong He liankai Jia zhangbo Xiao min li Shenzhen Branch CNOOC China LimitedGuangdong518000China

The Paleogene geological framework and evolution process in the central anticline zone in the Lufeng 13 sag in Pearl River Mouth Basin is well analyzed through seismic data and drilling data,and control of tectonic evolution on hydrocarbon accumulation is also *** results show that the central anticline zone in the Lufeng 13 sag develops the upper deformation layer and lower deformation ***“arched graben system”is developed in the upper deformation layer,and the magmatic diapir structure and flowing deformation of plastic strata is developed in the lower deformation *** evolution process of the central anticline zone can be divided into four stages,*** block uplifting stage,prototype stage,strengthening stage and finalization *** geological framework and tectonic evolution of the central anticline zone control Paleogene hydrocarbon *** Paleogene twolayer geological framework is favorable for development of structural traps and composite traps;the paleostructure highs are the direction of hydrocarbon migration,and the gravitational gliding faults are the main carrier bed for vertical hydrocarbon migration;the tectonic uplift is a key factor for reservoir diagenesis improvement and preservation of primary pores,and also controls distribution of high-quality reservoirs.

关键词： Geological framework Upper and lower deformation layers Gravitational gliding faults Hydrocarbon migration and accumulation Carrier bed The central anticline zone Lufeng sag

Plasma level and genetic variation of apolipoprotein E in patients with lipoprotein glomerulopathy

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Chinese Medical Journal 2005年第7期118卷 555-560页

作者： zhangbo liUZhi-hong ZENGCai-hong ZHENGJing-min CHENHui-ping ZHOUHong liLei-shi ResearchInstituteofNephrology JinglingHospitalNanjingUniversitySchoolofMedicineNanjing210002China ResearchInstituteofNephrology JinglingHospitalNanjingUniversitySchoolofMedicineNanjing210002China／／DepartmentofNephrologyFirstAffiliatedHospitalofNanjingMedicalUniversityNanjing210029China

Background lipoprotein glomerulopathy (LPG) is a renal disease characterized by thrombus-like lipoproteins in the glomerular capillaries and its abnormal lipoprotein profiles with marked elevation of apolipoprotein E (apoE). In this study, 15 Chinese patients with LPG were involed in exploring the association of the genetic variation and its plasma level in the pathogenesis of *** A retrospective analysis of the clinical and pathological features was made in 15 patients with LPG. Plasma concentrations of apoE were measured with radial immunodiffusion assay. Genetic variations of apoE gene were detected using polymerase chain reaction and restriction fragment length polymorphism. Glomerular deposition of apoA, apoB and apoE in these patients were detected by immunofluorescence staining using monoclonal antibodies. Results Biochemical profiles of lipids and lipoproteins revealed markedly elevated levels of triglyceride, apoB and apoE, but approximately normal levels of total cholesterol, apoA1 and lipoprotein(a) [Lp(a)], which resembled familial hypertriglyceridemia. Genetic analysis demonstrated that the genotype distribution of apoE were 7 cases with (ε3/ε 4,)4 cases with ε3/ε 3 and 2 cases with ε2/ε 3. The other 2 cases (a mother and her son) showed a same distinct band. The band pattern of later 2 cases was quite similar to the apoE variant of Tokyo type. The calculated allele frequency of ε 4 was relatively high in cases with LPG in comparison with that in the normal controls. We further divided the 13 patients into three groups according to their genotypes of apoE. Patients with the genotype of apoE ε2/ε3 showed a lower level of plasma apoE as compared to those with apoE ε3/ε4 (Plipoprotein (HDL) was the lowest in patients with the genotype of apoE ε3/ε4. No difference was found among the patients with different apoE genotype in the other clinical and pathological characteristics. Conclusions The genotype of apoE ε

关键词： lipoprotein glomerulopathy apolipoprotein E genetic variation

电场下偶氮苯衍生物分子顺反异构化反应机理的理论研究

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化学学报 2022年第6期80卷 781-787页

作者：王珞聪李哲伟岳彩巍张培焕雷鸣蒲敏北京化工大学化工资源有效利用国家重点实验室计算化学研究所化学学院北京100029

本工作采用密度泛函理论(DFT)方法计算研究了不同电场强度下偶氮苯衍生物2'-对甲苯偶氮基-1,1':4,4'-三苯基-4,4''二羧酸(TTDA)顺反异构化反应的机理.TTDA经过C—N_(1)=N_(2)角度顺反异构化过程存在三种可能的异构化模式(N=N偶氮基团中... 详细信息

本工作采用密度泛函理论(DFT)方法计算研究了不同电场强度下偶氮苯衍生物2'-对甲苯偶氮基-1,1':4,4'-三苯基-4,4''二羧酸(TTDA)顺反异构化反应的机理.TTDA经过C—N_(1)=N_(2)角度顺反异构化过程存在三种可能的异构化模式(N=N偶氮基团中与大取代基相连的N原子称为N_(2),与小取代基相连的N原子称为N_(1)),绕N_(1)或N_(2)原子的反转和绕N_(1)=N_(2)键旋转.计算结果表明,加入沿z轴的电场(以三联苯侧链C_(1)→C_(2)方向为z轴正方向),旋转路径为反应最优路径.此外,还研究了沿N=N键方向加入电场(以N_(2)→N_(1)方向为z轴正方向),在电场强度Fz=0.00 V·Å^(−1)时,N_(1)反转路径能垒较N_(2)反转路径高.当-0.62 V·Å^(−1)

关键词：电场偶氮苯衍生物异构化反应机理密度泛函理论

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珠江口盆地陆丰凹陷海丰33洼断裂特征

中国海上油气 2023年第3期35卷 45-52页

作者：李敏张素芳邱欣卫肖张波贺勇何雁兵中海石油(中国)有限公司深圳分公司广东深圳518054

陆丰凹陷是珠江口盆地(东部)的古近系勘探重要探区,近三十年来受限于钻井数量与仅有的二维地震资料,其盆缘洼陷海丰33洼缺乏断裂特征与洼陷结构的研究。在新三维地震资料构造解释基础上,本文对洼陷边界断裂、主干伸展断裂、张扭断裂进... 详细信息

陆丰凹陷是珠江口盆地(东部)的古近系勘探重要探区,近三十年来受限于钻井数量与仅有的二维地震资料,其盆缘洼陷海丰33洼缺乏断裂特征与洼陷结构的研究。在新三维地震资料构造解释基础上,本文对洼陷边界断裂、主干伸展断裂、张扭断裂进行识别,并对断裂活动性进行了分析,研究结果表明:(1)海丰33洼发育伸展断裂和张扭断裂,三组深大断裂——北部海丰33断裂、南部陆丰03断裂与北西部的海丰32断裂分别控制形成了主洼、南次洼、北次洼的洼陷格局;(2)北西部海丰32断裂受到左旋张扭应力场的作用,显示了张扭性断裂特征,在晚文昌—早恩平组沉积期断裂活动最强,地层沉降中心沿走滑分量迁移,北次洼沉积较厚上文昌组地层;(3)海丰33洼北西部发育的海丰32断阶构造带邻近烃源岩,张扭断裂控制了该构造带的圈闭类型与运移条件,为海丰33洼勘探的有利区带。

关键词：珠江口盆地陆丰凹陷海丰33洼张扭断裂洼陷结构