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Optimal Operation of an Integrated Electricity-heat Energy System Considering Flexible Resources Dispatch for Renewable Integration

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 699-710页

作者： Wei Wang Shuhao Huang guangming zhang Jizhen Liu Zhe Chen State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China School of Control and Computer Engineering North China Electric Power UniversityBeijing 102206China Department of Energy Technology Aalborg University9220 AalborgDenmark

Large fluctuations may occur on the energy supply and the load sides when large-scale renewable energies are integrated,leading to great challenges in power *** renewable power curtailment is especially numerous in the integrated electricity-heat energy system(IEHES)on account of electricity-heat *** flexible resources(FRs)on both the energy supply and load sides are introduced into the optimal dispatch of the IEHES and further modeled to alleviate the renewable fluctuations in this *** the energy supply side,three kinds of FRs based on electricity-heat coordination are modeled and *** the load side,the shiftable electricity demand resource is *** this basis,the solution for FRs participating in IEHES dispatch is given,with goals of maximizing the renewable penetration ratio and lowering operation *** scenarios are performed,and the results indicate that the proposed optimal dispatch strategy can effectively reduce the renewable energy curtailment and improve the flexibility of the *** contribution degrees of different FRs for renewable integration are also explored.

关键词： Integrated electricity-heat energy system(IEHES) renewable penetration flexible resource(FR) electricity-heat coordination shiftable demand load

废水处理中纳滤膜化学清洗技术研究现状、挑战与展望

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水处理技术 2024年第1期50卷 7-12,19页

作者：刘晓阳陈玉波白莹付洁张光明河北工业大学能源与环境工程学院河北工业大学天津市清洁能源利用与污染物控制重点实验室天津300401

纳滤技术由于其操作压力较低、对二价离子截留率高等优势,在市政污水、纺织废水、制药废水等废水处理领域有广阔的应用前景。然而膜污染问题的存在限制了纳滤技术的发展,膜污染不仅会导致膜通量衰减、分离性能下降,还会大大缩短膜的使... 详细信息

纳滤技术由于其操作压力较低、对二价离子截留率高等优势,在市政污水、纺织废水、制药废水等废水处理领域有广阔的应用前景。然而膜污染问题的存在限制了纳滤技术的发展,膜污染不仅会导致膜通量衰减、分离性能下降,还会大大缩短膜的使用寿命。化学清洗可有效缓解膜污染,但常用的清洗剂均会对膜结构和分离性能产生影响,还可能引发生物耐药性及膜清洗废水二次污染等问题。本文对不同类型废水处理中纳滤膜的污染特征及化学清洗方法进行综述,并且重点阐释了酸、碱、次氯酸钠等化学清洗剂与聚酰胺纳滤膜的作用机制,以及频繁的化学清洗对膜面微生物的影响和所引发的生物风险,最后对有关问题的解决措施提出展望,以期为膜污染控制方法的优化提供参考。

关键词：纳滤膜污染化学清洗废水处理水回用

Fabrication of Bi-Bi3O4Cl plasmon photocatalysts for removal of aqueous emerging contaminants under visible light

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Journal of Environmental Sciences 2022年第8期34卷 87-100页

作者： Zeqing Long Hui Song guangming zhang Jingsi Gao Jia Zhu School of Energy&Environmental Engineering Hebei University of TechnologyXiping roadBeichen districtTianjin 300130China School of Environment&Natural Resources Renmin University of ChinaBeijing 100872China School of Construction and Environment Engineering Shenzhen PolytechnicShenzhen 518055China Shanxi Aerospace Qinghua Equipment Co. Ltd.Changzhi 046012China

Photocatalytic oxidation of emerging contaminants(ECs) in water has recently gained extensive attentions. In this study, bismuth oxychloride-based plasmon photocatalysts(BiBiOCl) exhibiting high performance were successfully developed by reducing Bion the surface of BiOCl. Consequently, the photocatalysts were used to remove ECs from *** effects of developmental process and Bi metal plasmon resonance on the photoelectric performances of Bi-BiOCl were investigated through a series of characterizations. The UV-vis diffuse reflection and photoluminescence spectra revealed that the light absorption range of the photocatalyst gradually increased and the electron recombination rate gradually decreased with the introduction of Bi metals. The optimal removal rates of ciprofloxacin and tetrabromobisphenol A by Bi-BiOCl were 93.8% and 96.4%;the respective reaction rate constants were 5.48 and 4.93 times higher than that of BiOCl. The mechanism study indicated that main reactants in the photocatalytic system were ·O-2radicals and photogenerated holes, and the existence of oxygen vacancies and Bi metals promoted electron transfer in photocatalyst. In conclusion, this research produces a novel, green, highly efficient, and stable visible light photocatalyst for the removal of ECs from water.

关键词： Plasmon photocatalysts Environmental purification Bi3O4Cl Emerging contaminants Hazardous substance

Impacts of Fe2+on 5-aminolevulinic acid(ALA)biosynthesis of Rhodobacter sphaeroides in wastewater treatment by regulating nif gene expression

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Journal of Environmental Sciences 2018年第8期30卷 11-19页

作者： Shuli Liu Zhihong Zheng Jingxi Tie Jia Kang guangming zhang Jie zhang School of Environmental and Municipal Engineering North China University of Water Resources and Electric PowerZhengzhou 450000China Henan Key Laboratory of Water Environment Simulation and Treatment Zhengzhou 450046China Henan Engineering Research Center of Water Pollution and Soil Damage Remediation Zhengzhou 450046China School of Environment and Resource Renmin University of ChinaBeijing 100872China School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090China

This study aimed to increase bacterial growth and 5-aminolevulinic acid（ALA） biosynthesis of Rhodobacter sphaeroides in wastewater treatment through adding ferrous ion（ Fe2＋）. Results demonstrated that Fe2＋ effectively enhanced the biomass production and ALA yield of R. sphaeroides. Moreover, the optimal Fe2＋ dosage was found to be 400 μmol/L, which was associated with the highest biomass of 4015.3 mg/L and maximum ALA yield of 15.9 mg/g-dry cell weight（mg/g-DCW）. Mechanism analysis revealed that Fe2＋ vastly improved Adenosine Triphosphate（ATP） production by up-regulating the nif gene expression, and increasing ATP enhanced the biomass and ALA yield by supplying energy for bacterial growth and ALA biosynthesis, respectively. Correlation analysis showed that the ALA and ATP yields had positive relation with nifA and nifU gene expression. In addition, the nifA and nifU gene expression displayed high consistency of co-transcription at the optimal Fe2＋ dosage.

关键词： Ferrous ion 5-Aminolevulinic acid Rhodobacter sphaeroides ATP production nif genes Up-regulation

急性低盐胁迫对绿鳍马面鲀幼鱼存活、鳃组织结构及肝脏抗氧化能力的影响

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大连海洋大学学报 2024年第2期39卷 250-258页

作者：陈莹李凤辉张广明边力陈四清张子阳张宇傲严俊丽上海海洋大学水产与生命学院上海201306 中国水产科学研究院黄海水产研究所山东青岛266071 山东畜牧兽医职业学院山东潍坊261061

为揭示绿鳍马面鲀(Thamnaconus septentrionalis)幼鱼在低盐胁迫下的生理生化响应机制,试验设置3个盐度处理组(盐度15、20、25)和1个空白对照组(盐度30),对体质量为(20±5)g的绿鳍马面鲀幼鱼进行为期96 h的低盐胁迫试验,分别于胁迫试验... 详细信息

为揭示绿鳍马面鲀(Thamnaconus septentrionalis)幼鱼在低盐胁迫下的生理生化响应机制,试验设置3个盐度处理组(盐度15、20、25)和1个空白对照组(盐度30),对体质量为(20±5)g的绿鳍马面鲀幼鱼进行为期96 h的低盐胁迫试验,分别于胁迫试验后的24、48、72、96 h对幼鱼进行相关组织采样,分析急性低盐胁迫对绿鳍马面鲀幼鱼存活、鳃组织结构、鳃丝Na^(+)/K^(+)-ATP酶活性和肝脏抗氧化能力的影响。结果表明:在25~30盐度下,绿鳍马面鲀幼鱼的存活不受盐度影响,盐度小于20时对幼鱼存活有显著性影响(P0.05)。研究表明,盐度为25~30时适宜绿鳍马面鲀幼鱼生活,盐度小于25时,幼鱼机体会发生一系列应激反应,幼鱼鳃组织结构产生不同程度的适应性变化,在低盐胁迫下幼鱼有一定的自我调节能力。

关键词：低盐胁迫绿鳍马面鲀鳃组织结构抗氧化能力

全面供光策略调控废水培养光合细菌产单细胞蛋白

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农业工程学报 2024年第11期40卷 227-237页

作者：王晓丹卢海凤张光明司哺春卞含笑唐帅蒋伟忠李保明中国农业大学三亚研究院三亚572025 中国农业大学水利与土木工程学院北京100083 农业农村部设施农业工程重点实验室北京100083 河北工业大学能源与环境学院天津300401

为拓展蛋白质来源,缓解中国饲料蛋白资源短缺现状,该研究通过供光策略调控强化了沼泽红假单胞菌(***)从废水中回收菌体资源及单细胞蛋白(single cell protein, SCP)的效果,并解析了不同供光策略下物质合成与污染物降解之间的相关性。结... 详细信息

为拓展蛋白质来源,缓解中国饲料蛋白资源短缺现状,该研究通过供光策略调控强化了沼泽红假单胞菌(***)从废水中回收菌体资源及单细胞蛋白(single cell protein, SCP)的效果,并解析了不同供光策略下物质合成与污染物降解之间的相关性。结果表明:在白炽灯、120μmol/(m^(2)·s)的光强及18 h光/6 h暗(L/D)的光周期条件下菌体的生物量及日产量可达(1 140.56±19.72) mg/L及(0.32±0.02) g/(L·d),相较于24 L/0 D、 3 L/21 D及9 L/15 D组分别提高了17.06%~93.21%、54.43%~299.93%(P<0.05);在白炽灯、120 μmol/(m^(2)·s)的光强及3 h光/21 h暗的光周期条件下,菌体的蛋白质质量分数最高,为67.47%,相较于其他所有试验组提高了21.96%~44.54%(P<0.05)。化学需氧量(chemical oxygen demand, COD)和氨氮(ammonia nitrogen, NH_(4)^(+)-N)去除率在白炽灯、120 μmol/(m^(2)·s)的光强及18 h光/6 h暗的光周期条件下可达72.03%~78.40%。相关性分析表明,光强、光质分别与蛋白质含量及浓度呈显著负相关;而光周期与蛋白质浓度呈显著正相关,因此,光周期是R. palustris从废水体系中提升SCP产量的有效调控方法。该研究为提高废水体系中光合细菌合成SCP提供了新的方法与思路。

关键词：光质光强光周期光合细菌单细胞蛋白污染物降解

BiOCl-Bi12O17Cl2 nanocomposite with high visible-light photocatalytic activity prepared by an ultrasonic hydrothermal method for removing dye and pharmaceutical

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Chinese Journal of Catalysis 2020年第3期41卷 464-473页

作者： Zeqing Long Guang Xian guangming zhang Tao zhang Xuemei Li School of Environment&Natural Resources Renmin University of ChinaBeijing 100872China

A BiOCl-Bi12O17Cl2 nanocomposite with a high visible-light response and a low photoinduced electron-hole pair recombination rate was successfully synthesized using an ultrasonic-hydrothermal *** texture,structure,optical,and photocatalytic properties of the composite were *** results showed that the composite had a sheet flower-like structure with a large specific surface ***-visible diffuse reflection spectra and photoluminescence spectra showed that the composite had an excellent visible-light response and a low recombination rate of photoinduced electron hole *** photocatalytic property of the composite was evaluated by the removal efficiency of rhodamine B and ciprofloxacin under visible-light *** composite’s reaction rate constant of removing rhodamine B(/ciprofloxacin)was approximately 8.14(/4.94),42.63(/11.91)and 64.66(/36.07)times that of Bi12O17Cl2,P25,and BiOCl,***,the composite showed a wide applicable pH range and excellent *** analysis showed that photogenerated holes played a dominant role and·O2–also contributed to photocatalytic *** summary,this study presents a high-efficiency photocatalyst for wastewater treatment.

关键词： BiOCl-Bi12O17Cl2 Nanocomposite Green technology Visible-light photocatalysis

Study of Snap-acting Two Way Shape Memory Effect in NiTi Alloy

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Rare Metals 1989年第3期9卷 38-41页

作者： Lin, guangming zhang, Jinxiu Lou, Laizhong Zhongshan Univ China

Snap-acting transformation and snap-acting two way shape memory (TWSM) effect have been obtained in NiTi alloy using the constrained effect of stress on the driving force of TWSM element. The TWSM strain of the snap-acting element made of Ni51Ti49 alloy finishes abruptly at certain temperature without any additional mechanism, within an interval less than 1 ms. A thermodynamic model is presented to account for these observations.

关键词： Materials With Memory Thermodynamics Nickel Metallography Martensite Thermodynamics Mathematical Models Thermoelasticity

地形分辨率对EGPWS 2A告警的可靠性影响分析

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民航学报 2024年第2期8卷 103-108页

作者：向奎元张光明段中航中国民用航空飞行学院

本文研究地形分辨率对近地告警触发的影响，提出了一种采用地形预测告警的仿真技术。以紧急飞行状态下备降飞行航迹为例，通过对地形高程数据的处理，并对增强型近地告警系统告警模式2A进行仿真，实现了地形预测告警触发。引入不同分辨... 详细信息

本文研究地形分辨率对近地告警触发的影响，提出了一种采用地形预测告警的仿真技术。以紧急飞行状态下备降飞行航迹为例，通过对地形高程数据的处理，并对增强型近地告警系统告警模式2A进行仿真，实现了地形预测告警触发。引入不同分辨率高程数据，研究了地形分辨率对近地告警触发的影响，优化了近地告警触发决策机制。实验结果表明，较高分辨率地形高程数据能更加精确地预测告警，减少虚警和漏报发生。

关键词：近地告警可控飞行撞地高程数据地形分辨率