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Revealing the anaerobic acclimation of microbial community in a membrane bioreactor for coking wastewater treatment by Illumina Miseq sequencing

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Journal of Environmental Sciences 2018年第2期30卷 139-148页

作者： Jiadi zhu Lujun Chen Yan Zhang xiaobiao zhu School of environment Tsinghua Uniuersity Beijing 100084 China Zhejiang Provincial Key Laboratory of Water Science and Technology Department of Environmental Technology and Ecology Yangtze Delta Region Institute of Tsinghua University Zhejiang Jiaxing 314050 China School of Environmental and Civil Engineering Jiangnan University Wuxi 214222 China College of Chemical Engineering Beijing University of Chemical Technology Beijing 200029 China

The dynamic change of microbial community during sludge acclimation from aerobic to anaerobic in a MBR for coking wastewater treatment was revealed by Illumina Miseq sequencing in this study. The diversity of both Bacteria and Archaea showed an increase–decrease trajectory during acclimation, and exhibited the highest at the domestication interim. Ignavibacteria changed from a tiny minority（less than 1%） to the dominant bacterial group（54.0%） along with acclimation. The relative abundance of Betaproteobacteria kept relatively steady, as in this class some species increased coupled with some other species decreased during acclimation. The dominant Archaea shifted from Halobacteria in initial aerobic sludge to Methanobacteria in the acclimated anaerobic sludge. The dominant bacterial and archaeal groups in different acclimation stages were indigenous microorganisms in the initial sludge, though some of them were very rare. This study supported that the species in＂rare biosphere＂ might eventually become dominant in response to environmental change.

关键词： Microbial community Acclimation Coking wastewater Anaerobic MBR Miseq sequencing

Performance and microbial community of a membrane bioreactor system--Treating wastewater from ethanol fermentation of food waste

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Journal of Environmental Sciences 2017年第3期29卷 284-292页

作者： xiaobiao zhu Mengqi Li Wei Zheng Rui Liu Lujun Chen Beijing University of Chemical Technology College of Chemical EngineeringBeijing 100029China School of Environment Tsinghua UniversityBeijing 100084China Key Laboratory of Water Science and Technology of Zhejiang Province Jiaxing 314006China

In this study, a lab-scale biological anaerobic/anaerobic/anoxic/membrane bioreactor （A3-MBR） was designed to treat wastewater from the ethanol fermentation of food waste, a promising way for the disposal of food waste and reclamation of resources. The 454 pyrosequencing technique was used to investigate the composition of the microbial community in the treatment system. The system yielded a stable effluent concentration of chemical oxygen demand （202 ± 23 mg/L）, total nitrogen （62.1 ± 7.1 mg/L）, ammonia （0.3 ±0.13 mg/L） and total phosphorus （8.3 ± 0.9 rag/L）, and the reactors played different roles in specific pollutant removal. The exploration of the microbial community in the system revealed that：（1） the microbial diversity of anaerobic reactors A1 and A2, in which organic pollutants were massively degraded, was much higher than that in anoxic A3 and aerobic MBR; （2） although the community composition in each reactor was quite different, bacteria assigned to the classes Clostridia, Bacteroidia, and Synergistia were important and common microorganisms for organic pollutant degradation in the anaerobic units, and bacteria from Alphaproteobacteria and Betaproteobacteria were the dominant microbial population in A3 and MBR; （3） the taxon identification indicated that Arcobacter in the anaerobic reactors and Thauera in the anoxic reactor were two representative genera in the biological process. Our results proved that the biological A3-MBR process is an alternative technique for treating wastewater from food waste.

关键词： Food wasteMBRBacterial diversityMicrobial composition

Removal of tetrachlorobisphenol A and the effects on bacterial communities in a hybrid sequencing biofilm batch reactor-constructed wetland system

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Frontiers of Environmental Science & Engineering 2019年第1期13卷 147-157页

作者： Xiaohui Wang Shuai Du Tao Ya Zhiqiang Shen Jing Dong xiaobiao zhu Department of Environ mental Scie nee and Engineering College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China Beijing Municipal Research Institute of Environmental Protection Beijing 100037 China

Tetrachlorobisphenol A (TCBPA) released into the sewage may cause environmental pollution and health risk to human beings. The objective of this study was to investigate the removal ofTCBPA and bacterial community structures in a laboratory-scale hybrid sequencing biofilm batch reactor (SBBR)- constructed wetland (CW) system. The results showed that the removal efficiency of chemical oxidation demand (COD), ammonia, total nitrogen and total phosphorus in the SBBR-CW system was 96.7%, 97.3%, 94.4%, and 8&6% respectively. At the stable operation stage, the system obtained a 71.7%±1.8% of TCBPA removal efficiency with the influent concentration at 200μg/L. Illumina MiSeq sequencing of 16S rRNA gene revealed that the presence of TCBPA not only reduced the bacterial diversity in the SBBR-CW system, but also altered the composition and structure of bacterial community. After the addition of TCBPA, Proteobacteria increased from 31.3% to 38.7%, while Acidobacteria and Parcubacteria decreased greatly in the SBBR. In contrast, Acidobacteria replaced Proteobacteria as the dominant phylum in the upper soils of CW. The results indicated that TCBPA stimulated the growth of GAOs in the SBBR without deteriorating the phosphorus removal due to the presence of sufficient carbon sources. The ammonia oxidizing bacteria, Nitrosomonas, and denitrification bacteria, Hyphomicrobium and Pseudomonas, were inhibited by TCBPA, resulting in a decreasing the removal efficiency of TN and ammonia.

关键词： SBBR Constructed wetland Tetrachlorobisphenol A Microbial community structure

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书籍码垛机械臂运动规划方法研究

邵阳学院学报（自然科学版） 2024年第2期21卷 56-63页

作者：戴小标邓正午祝豪李滔邵阳学院机械与能源工程学院湖南邵阳422000 邵阳学院高效动力系统智能制造湖南省重点实验室湖南邵阳422000 邵阳学院国际学院湖南邵阳422000

平稳性是机械臂码垛书籍的重要指标。基于MDH(modified denavit-harten-berg)参数法对六自由度书籍码垛机械臂进行建模,采用解析法推导其运动学逆解。对三次多项式插值、五次多项式插值和新型S形曲线加减速法的轨迹规划方法进行分析,利... 详细信息

平稳性是机械臂码垛书籍的重要指标。基于MDH(modified denavit-harten-berg)参数法对六自由度书籍码垛机械臂进行建模,采用解析法推导其运动学逆解。对三次多项式插值、五次多项式插值和新型S形曲线加减速法的轨迹规划方法进行分析,利用MATLAB机器人工具箱进行运动仿真,得到单关节位移、速度和加速度曲线。对比分析运动曲线,发现新型S形曲线加减速法所规划的运动曲线最平滑。利用新型S形曲线加减速法轨迹规划六自由度机械臂,可获得非常平稳的末端轨迹。结果表明,新型S形曲线加减速轨迹规划方法非常平稳,更适合机械臂书籍码垛的作业任务。

关键词：书籍码垛机械臂轨迹规划 MATLAB机器人工具箱

工艺条件对柴油吸附分离重芳烃轻质化反应的影响

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无机盐工业 2024年第6期56卷 139-146页

作者：刘凯隆朱孔义郭春垒马晓彪王宇健盛强李翔王银斌靳凤英中海油天津化工研究设计院有限公司天津300131 天津科技大学化工与材料学院天津300457 内蒙古伊泰石油化工有限公司内蒙古鄂尔多斯017000

馏分油芳烃吸附分离技术是炼厂过剩汽、煤、柴油资源高效利用的途径。分离得到的非芳烃组分可通过蒸汽裂解或催化裂解增产低碳烯烃,以单环芳烃为主的芳烃组分则可通过重芳烃轻质化技术增产苯、甲苯和二甲苯等轻质芳烃,同时副产优质乙烯... 详细信息

馏分油芳烃吸附分离技术是炼厂过剩汽、煤、柴油资源高效利用的途径。分离得到的非芳烃组分可通过蒸汽裂解或催化裂解增产低碳烯烃,以单环芳烃为主的芳烃组分则可通过重芳烃轻质化技术增产苯、甲苯和二甲苯等轻质芳烃,同时副产优质乙烯裂解原料。以吸附分离重芳烃组分为原料,测定了氢气溶解量。吸附分离重芳烃油中氢气的溶解量随温度和氢压的增加而增加,达到1.0×10^(-4)~3.2×10^(-4) mol/g,比油中多环芳烃加氢成单环芳烃所需理论耗氢量低1~2个数量级。进一步采用NiMo/β轻质化催化剂在固定床反应器上考察了催化剂还原条件、反应器高径比、反应温度、氢分压、氢油比、空速等工艺参数对吸附分离重芳烃轻质化反应的影响。在低温高压(350℃、4 MPa)的还原工况下,反应器高径比为4.5、反应温度为400~410℃、氢分压为5.0~5.5 MPa、氢油体积比为800~1 000、质量空速为1~1.5 h^(-1)的条件下,吸附分离重芳烃轻质化效果最佳,C^(+)_(10)转化率≥85%,C_(6)~C_(9)芳烃收率≥50%,C_(6)~C_(9)芳烃纯度≥97.5%。柴油芳烃吸附分离和重芳烃轻质化可实现高效耦合,显著提高化工品收率,具有重大的现实意义和广阔的应用前景。

关键词：吸附分离芳烃柴油芳烃重芳烃轻质化芳烃收率溶氢

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混凝对正渗透过程中抗生素去除特性及膜污染的影响

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环境工程学报 2019年第12期13卷 2838-2844页

作者：卢仙林朱小彪北京化工大学化学工程学院北京100029

为探明混凝预处理对正渗透去除抗生素的影响以及混凝对后续膜处理的影响,选用PAC、FeCl3、Al2(SO4)3对正渗透原料液进行混凝预处理,考察了混凝预处理对正渗透水通量、NaCl返混通量、抗生素截留率及膜污染的影响。结果表明:混凝预处理对... 详细信息

为探明混凝预处理对正渗透去除抗生素的影响以及混凝对后续膜处理的影响,选用PAC、FeCl3、Al2(SO4)3对正渗透原料液进行混凝预处理,考察了混凝预处理对正渗透水通量、NaCl返混通量、抗生素截留率及膜污染的影响。结果表明:混凝预处理对正渗透过程中膜污染程度的影响由原料液中HA残留量以及Zeta电位共同决定;经混凝预处理后,原料液中腐殖酸残留量越多,正渗透过程中所形成的滤饼层越厚,原料液Zeta电位绝对值越低,形成的滤饼层越密实。滤饼层的形态影响正渗透的浓差极化作用,进而影响正渗透的运行特性及抗生素的截留效果,同时决定了膜清洗的难易程度。

关键词：混凝正渗透头孢他啶膜污染

新闻真实与新闻侵权纠纷中“真实性”的司法认定

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西南民族大学学报（人文社会科学版） 2007年第3期28卷 165-168页

作者：朱颖陈小彪南昌大学新闻系重庆邮电大学法学院

新闻真实性问题是新闻学的本位问题,也是新闻侵权纠纷中争议的焦点问题,但是存在着很多争议。本文对目前关于新闻真实性的理论做了一个梳理,对新闻侵权纠纷中的真实性作出新的理论诠释,并在此基础上提出逻辑真实为核心的判断新闻真实的... 详细信息

新闻真实性问题是新闻学的本位问题,也是新闻侵权纠纷中争议的焦点问题,但是存在着很多争议。本文对目前关于新闻真实性的理论做了一个梳理,对新闻侵权纠纷中的真实性作出新的理论诠释,并在此基础上提出逻辑真实为核心的判断新闻真实的标准。

关键词：客观真实逻辑真实新闻真实新闻侵权司法认定

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基于季节调整技术的我国物价波动实证研究

统计研究 2012年第9期29卷 61-65页

作者：吴岚朱莉龚晓彪四川大学工商管理学院四川省统计科学研究所广安市建设银行金安大道储蓄所

本文首先对季节调整方法的发展及应用进行说明,并对X-12-ARIMA和TRAMO/SEATS进行比较;其次使用X-12-ARIMA方法对我国CPI时间序列数据做了实证研究,分离出最终趋势成分、季节成分等;然后通过PBC版X-12-ARIMA分离出时间序列中的春节因素;... 详细信息

本文首先对季节调整方法的发展及应用进行说明,并对X-12-ARIMA和TRAMO/SEATS进行比较;其次使用X-12-ARIMA方法对我国CPI时间序列数据做了实证研究,分离出最终趋势成分、季节成分等;然后通过PBC版X-12-ARIMA分离出时间序列中的春节因素;最后通过调整后的CPI序列进行短期预测。

关键词：季节调整 CPI X-12-ARIMA TRAMO/SEATS

服务石化行业的水污染控制工程课程设计教学改革与实践

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化工管理 2023年第36期 32-34,39页

作者：朱小彪胡翔员荣平张婷婷北京化工大学北京100029

水污染控制工程课程设计是环境工程专业的实践类核心课程之一,是学生理论知识与工程能力衔接的重要环节。化工、石化和能源等大化工行业领域亟需实践能力强、综合素质高的水污染治理专业人才。化工行业院校环境工程专业在提高学生工程... 详细信息

水污染控制工程课程设计是环境工程专业的实践类核心课程之一,是学生理论知识与工程能力衔接的重要环节。化工、石化和能源等大化工行业领域亟需实践能力强、综合素质高的水污染治理专业人才。化工行业院校环境工程专业在提高学生工程实践能力的目标下,对水污染控制工程课程设计进行教学内容、教学方法、评价体系的改革和实践,以期为同类院校环境工程专业教学提供参考。

关键词：水污染控制工程化工环境保护课程设计教学改革化工废水