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Characteristics of high-sulfate wastewater treatment by two-phase anaerobic digestion process with Jet-loop anaerobic fluidized bed

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Journal of Environmental Sciences 2007年第3期19卷 264-270页

作者： WEI Chao-hai, WANG Wen-xiang, DENG Zhi-yi, wu Chao-fei School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China. School of Environmental Science and Engineering South China University of Technology Guangzhou 510640 China

A new anaerobic reactor, Jet-loop anaerobic fluidized bed （JLAFB）, was designed for treating high-sulfate wastewater. The treatment characteristics, including the effect of influent COD/SO42 ratio and alkalinity and sulfide inhibition in reactors, were discussed for a JLAFB and a general anaerobic fiuidized bed （AFB） reactor used as sulfate-reducing phase and methane-producing phase, respectively, in two-phase anaerobic digestion process. The formation of granules in the two reactors was also examined. The results indicated that COD and sulfate removal had different demand of influent COD/SO4^2- ratios. When total COD removal was up to 85%, the ratio was only required up to 1.2, whereas, total sulfate removal up to 95% required it exceeding 3.0. The alkalinity in the two reactors increased linearly with the growth of influent alkalinity. Moreover, the change of influent alkalinity had no significant effect on pH and volatile fatty acids （VFA） in the two reactors. Influent alkalinity kept at 400-500 mg/L could meet the requirement of the treating process. The JLAFB reactor had great advantage in avoiding sulfide and free-H2S accumulation and toxicity inhibition on microorganisms. When sulfate loading rate was up to 8. 1 kg/（m^3.d）, the sulfide and free-H2S concentrations in JLAFB reactor were 58.6 and 49.7 mg/L, respectively. Furthermore, the granules, with offwhite color, ellipse shape and diameters of 1.0-3.0 mm, could be developed in JLAFB reactor. In granules, different groups of bacteria were distributed in different layers, and some inorganic metal compounds such as Fe, Ca, Mg etc. were found.

关键词： Jet-loop anaerobic fluidized bed reactor sulfate wastewater two-phase anaerobic digestion process granule sludge

Recent Transmission Analysis of 66 MDR-TB Strains Using the 15-locus MIRU-VNTR Method

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Biomedical and Environmental Sciences 2020年第10期33卷 791-795页

作者： JIA Qing Jun ZENG Mei Chun LI Qing Chun wu yi fei HUANG yin Yan LU Min AI Li Yun XIE Li Hangzhou Center for Disease Control and Prevention Hangzhou 310021ZhejiangChina Department of Pathology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003ZhejiangChina

Tuberculosis(TB),caused by Mycobacterium tuberculosis complex(MTBC)infection,has existed for millennia and remains a major global health *** on the molecular epidemiology of transmission is an effective way to analyze TB transmission[1].Restriction fragment length polymorphism is a popular molecular technique that has been used to discriminate among clinical MTBC strains in past decades.

关键词： epidemiology tuberculosis clinical

Characterization of Mutations in Genes Related to Rifampicin and Isoniazid Resistance in Multidrug-resistant Mycobacterium tuberculosis Strains from Hangzhou,China

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Biomedical and Environmental Sciences 2023年第9期36卷 869-873页

作者： HUANG yin Yan XIE Li wu yi fei JIA Qing Jun CHENG Qing Lin LI Qing Chun AI Li Yun BAI Xue Xin Department of TB Control and Prevention Hangzhou Center for Disease Control and PreventionHangzhou 310021ZhejiangChina

Tuberculosis(TB),caused by the Mycobacterium tuberculosis complex(MTBC),is the 13^(th)leading cause of death and the second leading cause of infectious killer after COVID-19(above HIV and AIDS),according to the World Health Organization's 2022 Global TB *** 2021,10.6 million people were diagnosed with a new episode of TB and 1.6 million people died as a result.

关键词： tuberculosis death Mycobacterium

Analysis of axial force of double circular arc helical gear hydraulic pump and design of its balancing device

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Journal of Central South University 2021年第2期28卷 418-428页

作者： wu yi-fei GE Pei-qi BI Wen-bo School of Mechanical Engineering Shandong UniversityJinan 250061China Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education) Shandong UniversityJinan 250061China

In view of the axial force produced in the working process of double arc helical gear hydraulic pump,the theory of differential equation of curve and curved surface was utilized so that the calculation formula of axial force was obtained and the relationship between the axial force and structure parameters of gears was *** order to balance the axial force,the pressure oil in the high pressure area was introduced into the end face of the plunger to press the plunger against the gear shaft,and the hydrostatic bearing whose type is plunger at the end of the shaft was *** order to verify the balance effect of axial force,the leakage owing to end clearance and volume efficiency of gear hydraulic pump before and after the balancing process was *** paper provides a new analysis idea and balance scheme for the axial force produced in the working process of the double arc helical gear hydraulic pump,which can reduce the leakage owing to end clearance caused by the axial force and improve the volume efficiency of the gear hydraulic pump.

关键词： double arc helical gear gear hydraulic pump axial force hydrostatic bearing

Molecular Detection of Ofloxacin and Kanamycin Resistance in Patients with MDR and Non-MDR TB from Suburban Districts in Hangzhou,China,2019–2020

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Biomedical and Environmental Sciences 2022年第5期35卷 468-471页

作者： JIA Qing Jun ZENG Mei Chun XIE Li CHENG Qing Lin HUANG yin Yan LI Qing Chun wu yi fei AI Li Yun LU Min FANG Zi Jian Department of TB Control and Prevention Hangzhou Center for Disease Control and PreventionHangzhou 310021ZhejiangChina Department of Pathology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003ZhejiangChina

The continuing emergence and spread of drugresistant Mycobacterium tuberculosis complex(MTBC)poses a challenge to global tuberculosis(TB)control *** resistance in TB is mainly conferred by specific point mutations in ... 详细信息

关键词： tuberculosis Patients Molecular

SGCMGs驱动的挠性航天器有限时间自适应鲁棒控制

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自动化学报 2021年第3期47卷 641-651页

作者：王璐郭毓吴益飞南京理工大学自动化学院南京210094

针对挠性航天器系统中同时存在单框架控制力矩陀螺群(Single gimbaled control moment gyroscopes,SGCMGs)摩擦非线性、电磁干扰力矩、惯量摄动以及外部干扰等问题,提出了一种有限时间自适应鲁棒控制(Finite-time adaptive robust contr... 详细信息

针对挠性航天器系统中同时存在单框架控制力矩陀螺群(Single gimbaled control moment gyroscopes,SGCMGs)摩擦非线性、电磁干扰力矩、惯量摄动以及外部干扰等问题,提出了一种有限时间自适应鲁棒控制(Finite-time adaptive robust control,FTARC)方法.针对系统中存在未知参数的情况,分别设计自适应更新律,使得控制器的设计不依赖参数信息,同时减小外部干扰对系统的不利影响.应用Lyapunov稳定性理论证明了闭环系统姿态角误差和姿态角速度误差可在有限时间内收敛到原点附近的邻域内.仿真结果表明,所提控制律可实现挠性航天器姿态快速机动,并获得甚高指向精度.

关键词：单框架控制力矩陀螺群挠性航天器有限时间自适应鲁棒控制不确定性

The Retrospective Diagnostic Potential of Gene Xpert MTB/RIF for the Analysis of Formalin-Fixed Paraffin-Embedded Tissue from Extrapulmonary Tuberculosis Patients

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Biomedical and Environmental Sciences 2023年第3期36卷 295-298页

作者： JIA Qing Jun ZENG Mei Chun CHENG Qing Lin HUANG yin Yan wu yi fei LI Qing Chun WANG Le AI Li Yun FANG Zi Jian CHENG Shi SHU Li Ping Department of TB Control and Prevention Hangzhou Center for Disease Control and PreventionHangzhou 310021ZhejiangChina Department of Pathology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003ZhejiangChina Department of Microbiological Examination Hangzhou Center for Disease Control and PreventionHangzhou 310021ZhejiangChina Department of Nutrition and Food Safety Hangzhou Center for Disease Control and PreventionHangzhou 310021ZhejiangChina

Tuberculosis(TB)is a chronic disease caused by infection with Mycobacterium *** confirmation of this infection is challenging due to the paucibacillary nature of extrapulmonary tuberculosis(EPTB).

关键词： MTB/RIF tuberculosis Tuberculosis

Alterations of FHIT Gene and P16 Gene in Nickel Transformed Human Bronchial Epithelial Cells

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Biomedical and Environmental Sciences 2006年第4期19卷 277-284页

作者： WEI-DONG JI JIA-KUN CHEN JIA-CHUN LU ZHONG-LIANG wu fei yi SU-MEI FENG Institute for Chemical Carcinogenesis Guangzhou Medical College Guangzhou 510182 Guangdong China

Objective To study the alterations of FHIT gene and P16 gene in malignant transformed human bronchial epithelial cells induced by crystalline nickel sulfide using an immortal human bronchial epithelial cell line, and to explore the molecular mechanism of nickel carcinogenesis. Methods 16HBE cells were treated 6 times with different concentrations of NiS in vitro, and the degree of malignant transformation was determined by assaying the anchorage-independent growth and tumorigenicity. Malignant transformed cells and tumorigenic cells were examined for alterations of FHIT gene and P16 gene using RT-PCR, DNA sequencing, silver staining PCR-SSCP and Western blotting. Results NiS-treated cells exhibited overlapping growth. Compared wkh that of negative control cells, soft agar colony formation efficiency of NiS-treated cells showed significant increases （P〈0.01） and dose-dependent effects. NiS-treated cells could form tumors in nude mice, and a squamous cell carcinoma was confirmed by histopathological examination. No mutation of exon 2 and exons 2-3, no abnormal expression in pl6 gene and mutation of FHIT exons 5-8 and exons 1-4 or exons 5-9 were observed in transformed cells and tumorigenic cells. However, aberrant transcripts or loss of expression of the FHIT gene and Fhit protein was observed in transformed cells and tumorigenic cells. One of the aberrant transcripts in the FHIT gene was confirmed to have a deletion of exon 6, exon 7, exon 8, and an insertion of a 36 bp sequence replacing exon 6-8. Conclusions The FHIT gene rather than the P16 gene, plays a definite role in nickel carcinogenesis. Alterations of the FHIT gene induced by crystalline NiS may be a molecular event associated with carcinogen, chromosome fragile site instability and cell malignant transformation. FHIT may be an important target gene activated by nickel and other exotic carcinogens.

关键词： Crystalline nickel sulfide Human bronchial epithelial cell line Malignant transformation P16 gene FHIT gene

地方政府管治下城市空间拓展——以广州市为例

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人文地理 2014年第4期29卷 52-58页

作者：吴翊朏李郇中山大学地理科学与规划学院广州510275

改革开放以来的一系列制度变化对地方政府的政府职能和管治手段提出了新的要求,并由此对城市空间拓展产生了深远影响。以广州市为研究对象,探讨了其近十年城市空间拓展与地方政府管治的关系,发现市级政府以行政区划调整为手段、以战略... 详细信息

改革开放以来的一系列制度变化对地方政府的政府职能和管治手段提出了新的要求,并由此对城市空间拓展产生了深远影响。以广州市为研究对象,探讨了其近十年城市空间拓展与地方政府管治的关系,发现市级政府以行政区划调整为手段、以战略规划为纲领的管治方式主导了城市生产及流通空间的建设;同时,由于各级政府之间利益协调的原因,地方政府管治过程出现了尺度分异,表现为区级政府与房地产市场共同作用下外围地区空间拓展向北低效蔓延的管治失灵现象。通过对政府管治在城市空间构建过程中的作用和成效的探讨,以期对引起人们对中国城市化进程中地方政府管治和城市空间关系的思考。

关键词：管治地方政府空间拓展广州