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Potassium ferrate pretreatment promotes short chain fatty acids yield and antibiotics reduction in acidogenic fermentation of sewage sludge

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Journal of Environmental Sciences 2022年第10期34卷 41-52页

作者： Zihao Qiao suyun xu Wanqiu Zhang Shuyin Shi Wei Zhang Hongbo Liu School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai 200093China Centillion Resource Recycling(Wuxi)Co.Ltd. Wuxi 214000China

During the acidogenic fermentation converting waste activated sludge (WAS) into shortchain fatty acids (SCFA), hydrolysis of complex organic polymers is a limiting step and the transformation of harmful substances (such as antibiotics) during acidogenic fermentation is unknown. In this study, potassium ferrate (KFeO) oxidation was used as a pretreatment strategy for WAS acidogenic fermentation to increase the hydrolysis of sludge and destruct the harmful antibiotics. Pretreatment with KFeOcan effectively increase the SCFA production during acidogenic fermentation and change the distribution of SCFA *** the dosage of 0.2 g/g TS, the maximum SCFA yield was 4823 mg COD/L, which is 28.3times that of the control group;acetic acid accounts for more than 90% of the total SCFA. The higher dosage (0.5 g/g TS) can further increase the proportion of acetic acid, but inhibit the overall performance of SCFA production. Apart from the promotion of hydrolysis and acidogenesis, KFeOpretreatment can also simultaneously oxidizes and degrades part of the antibiotics in the sludge. When the dosage is 0.5 g/g TS, the degradation efficacy of antibiotics is the most significant, and the contents of ofloxacin, azithromycin, and tetracycline in the sludge are reduced by 69%, 42%, and 50%, respectively. In addition, KFeOpretreatment can also promote the release of antibiotics from sludge flocs, which is conducive to the simultaneous degradation of antibiotics in the subsequent biological treatment process.

关键词： Acidogenic fermentation Antibiotics Potassium ferrate Oxidation pretreatment Sewage sludge Volatile fatty acids

Enhancing Diagnosis and Treatment Adjustments for Travelers Infected with Burkholderia pseudomallei:A Case Report-Beijing Municipality,China,June 2023

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China CDC weekly 2024年第25期6卷 614-616页

作者： Shijie Li Yushan He Yiyang Mao Jun Liu Wenmiao xu suyun Qian Quan Wang Pediatric Intensive Care Unit Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina Capital Medical University BeijingChina

Summary What is already known about this topic?Burkholderia pseudomallei(BP)infection leads to melioidosis,a tropical disease endemic to coastal provinces of southern *** in nonendemic areas,do not commonly consider this disease as a primary differential diagnosis for febrile *** is added by this report?This article discusses a case of melioidosis in Northern *** patient,who had recently visited a Southeast Asian region with high melioidosis prevalence,fell ill after exposure to contaminated *** disease progressed quickly and with *** are the implications for public health practice?Healthcare workers need to remain vigilant regarding travel-related diseases for accurate differential diagnosis and to provide timely and effective treatment,especially for patients with recent travel history or symptoms during travel.

关键词： diagnosis China. travel

Anaerobic treatment of fresh leachate from a municipal solid waste incinerator by upflow blanket filter reactor

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Frontiers of Environmental Science & Engineering 2009年第4期3卷 404-411页

作者： Pinjing HE Min LI suyun xu Liming SHAO State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water EnvironmentCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China

This paper describes the feasibility of fresh leachate treatment by an upflow blanket filter(UBF).Through dilution and partial effluent recycling,the organic loading rates increased from 0.51 to 14.56 kg COD/(m^(3)·d),meanwhile the corresponding hydraulic retention time decreased from 9.0 to 3.6 *** reactor was able to achieve steady-state within 80 *** on the distribution of COD fluxes in the process,it was concluded that anabolism was the main pathway of COD removal in the initial phase(1–33 d),accounting for 57%–85%of total COD *** the anaerobic consortium of bacteria reached steady-state(after 70–86 d),the majority of COD removed was transformed into methane,because the specific methane yield was close to the theoretical value(0.36 L CH4/(g CODdeg)).

关键词： distribution of COD fluxes effluent recycling leachate methane yield organic loading rate upflow blanket filter

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镇痛镇静治疗从舒适到器官功能保护

中华儿科杂志 2024年第3期62卷 193-195页

作者：许峰刘春峰钱素云重庆医科大学附属儿童医院重症医学科重庆400014 中国医科大学附属盛京医院儿科重症监护病房沈阳110004 首都医科大学附属北京儿童医院重症医学科北京100045

镇痛镇静治疗是儿童重症监护病房患儿的基本治疗措施,而器官功能支持与保护是镇痛镇静治疗的核心目的。镇痛镇静治疗与血流动力学支持、机械通气、持续肾脏替代治疗等具有同样的临床地位,已成为脑保护、肺保护、休克治疗以及器官功能衰... 详细信息

镇痛镇静治疗是儿童重症监护病房患儿的基本治疗措施,而器官功能支持与保护是镇痛镇静治疗的核心目的。镇痛镇静治疗与血流动力学支持、机械通气、持续肾脏替代治疗等具有同样的临床地位,已成为脑保护、肺保护、休克治疗以及器官功能衰竭防治的重要手段。

关键词：儿童重症监护病房持续肾脏替代治疗镇痛镇静治疗器官功能衰竭肺保护血流动力学基本治疗措施临床地位

Transformation of organic matters in fresh leachate during anaerobic degradation under long hydraulic retention time

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Journal of Environmental Sciences 2009年第9期21卷 1302-1308页

作者： xu suyun,HE Pinjing,LU Fan,LI Min,SHAO Liming State Key Laboratory of Pollution Control and Resources Reuse,Key Laboratory of Yangtze River Water Environment,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China

This study investigated the biodegradability of fresh leachate from a young municipal solid waste landfill at the inoculum to substrate ratios （V/V） of 10/100, 25/100, 50/100 and 100/100, as well as the transformation of organic matters in leachate under prolonged hydraulic retention time （HRT） of 50 d. Fresh leachate showed a good biodegradability, with chemical oxygen demand （COD） removal efficiency as high as 87%-92% and cumulative methane yield close to theoretical value （0.35 L CH4/g CODdeg）. Methane production and COD depletion presented biphasic characteristics associated with the successive utilization of two major intermediates, acetate and propionate, The biphasic degradation of fresh leachate was resulted from the different hydrolysis rates of diverse substrates and the changes in microorganism community structure. After 50 d, the effluents were dominated by high-MW organic compounds （MW 〉 10 kDa） at each inoculum ratio, which might be refractory compounds released from cell lyses.

关键词： biodegradability biomass lyses methane production ratio of inoculum to substrate volatile fatty acids

Velocity structure of uppermost mantle beneath North China from Pn tomography and its implications

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Science China Earth Sciences 2003年第Z2期46卷 130-140页

作者： WANG suyun (汪素云) xu Zhonghuai (许忠淮) PEI Shunping (裴顺平) Institute of Geophysics China Seismological Bureau Beijing 100081 China Institute of Geophysics China Seismological Bureau Beijing 100081 China Institute of Geophysics China Seismological Bureau Beijing 100081 China

20301 Pn arrival time data are collected from the seismological bulletins of both national and regional seismic networks. Pn travel time residuals are tomographically inverted for the Pn velocity structure of uppermost mantle beneath North China. The result indicates that the average Pn velocity in North China is 7.92 km/s, and the velocity varies laterally from ?0.21 to +0.29 km/s around the average. The approximately NNE trending high and low velocity regions arrange alternatively west-eastward. From west to east we can see high velocity in the middle Ordos region, the Shanxi graben low, the Jizhong depression high, the west Shandong uplift and Bohai Sea low, and the high velocity region to the east of the Tanlu fault. In the southern boundary zone of the North China block, except for the high velocity in the Qingling Mountains region, the velocity is generally lower than the average. Obvious velocity anisotropy is seen in the Datong Cenozoic volcanic region, with the fast velocity direction in NNE-SSW. Notable velocity anisotropy is also seen around the Bay of Bohai Sea, and the fast velocity directions seem to show a rotation pattern, possibly indicating a flow-like deformation in the uppermost mantle there. The Pn velocity variations show a reversed correlation with the Earth's heat flow. The low Pn velocity regions generally show high heat flow, e.g., the Shanxi graben and Bohai Sea region. While the high Pn velocity regions usually manifest low heat flow, e.g., the region of Jizhong depression. This indicates that the Pn velocity variation in the study region is mainly aroused by the regional temperature difference in the uppermost mantle. Strong earthquakes in the crust tend to occur in the region with the abnormal low Pn velocity, or in the transition zone between high and low Pn velocity regions. The earthquakes in the low velocity region are shallower, while that in the transition zone are deeper.

关键词： North China, Pn velocity, seismic tomography, Earth's heat flow, earthquake focal depth.

Relocation of Microearthquakes in Beijing and Its Neighboring Areas and Its Tectonic Implications

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Earthquake Research in China 1996年第1期10卷 42-50页

作者： Wang suyun,xu Zhonghuai,Yu Yanxiang,and Huan WenlinInstitute of Geophysics,SSB,Beijing 100081,China

The 348 microearthquakes that occurred in Beijing and its neighboring areas(39°-41°,114°-117°E)during 1979 to March of 1992 are relocated in this *** of hypocenter locations is improved by rechecking and supplementing readings of arriving times of the seismic phases used,testing and selecting the appropriate crustal model,and modifying the computer *** the relocation,the number of earthquakes with focal depth determination has been increased to 313 from the previous *** overall average RMS residual of the observational arrival times has been reduced to 0.45±0.18 s from the previous value of 0.80±0.40 *** 10% of the relocated hypocenters,which are mostly in border regions of the area covered by the Beijing Telemetered Seismic Network,have been shifted more than 10 *** of the relocated earthquakes are concentrated in the intermountainous basins,such as the Huai’an,xuanhua,Huailai,and Zhuolu basins,and are related with the basin boundary faults between

关键词： Seismic location Focal depth Epicentral distribution Active fault

不同碳源及电压对微生物电解池脱氮性能的影响

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上海理工大学学报 2023年第1期45卷 87-94页

作者：石书银张雨晴阮燕囡徐苏云刘洪波上海理工大学环境与建筑学院上海200093

在不同电压条件下,考察微生物电解池(MEC)对模拟沼液中不同碳源(乙酸、富里酸)和总氮的脱除效果,并分析其微生物群落结构变化。以乙酸为碳源,NO3--N几乎完全被去除,化学需氧量(COD)去除率稳定在72%左右;以富里酸为碳源,NO3--N和COD去除... 详细信息

在不同电压条件下,考察微生物电解池(MEC)对模拟沼液中不同碳源(乙酸、富里酸)和总氮的脱除效果,并分析其微生物群落结构变化。以乙酸为碳源,NO3--N几乎完全被去除,化学需氧量(COD)去除率稳定在72%左右;以富里酸为碳源,NO3--N和COD去除率分别下降至40%~50%和50%~60%。比较而言,MEC在0.2~0.4 V电压条件下COD和总氮去除性能更稳定;在更高的电压(0.8 V)条件下,NO3--N的去除率最高上升至52%,但总氮去除率下降至(32.4±3.7)%。高通量测序结果显示,外加电压可以有效地提高微生物菌群抵抗底物负荷冲击的能力,并增加MEC反应器内的菌群特别是自养脱氮菌的多样性和丰度。其中,自养反硝化菌Thanuera的丰度由4.35%增长到7.65%;在以富里酸为碳源的MEC反应器中,多种厌氧脱氮细菌被激活富集,反硝化细菌Anaerolineae最大丰度为11.16%,厌氧氨氧化菌Planctomycetota的相对丰度由对照组的0.41%提升至1.59%。

关键词：微生物电解池微生物群落沼液富里酸反硝化

PEO/PS/PMMA聚合物电解质膜的制备及性能研究

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能源研究与信息 2022年第1期38卷 8-15页

作者：郑成日芦津徐苏云平北工业大学日用化工学院新义州999093朝鲜民主主义人民共和国上海理工大学环境与建筑学院上海200093

聚合物电解质是解决锂离子电池安全性问题的有效途径之一。考察了由聚环氧乙烷(PEO)、聚苯乙烯(PS)、聚甲基丙烯酸甲酯(PMMA)、聚乙二醇(PEG)和双三氟甲烷磺酰亚胺锂盐(LiTFSI)组成的固体聚合物电解质膜的性能。采用聚合物共混技术制备... 详细信息

聚合物电解质是解决锂离子电池安全性问题的有效途径之一。考察了由聚环氧乙烷(PEO)、聚苯乙烯(PS)、聚甲基丙烯酸甲酯(PMMA)、聚乙二醇(PEG)和双三氟甲烷磺酰亚胺锂盐(LiTFSI)组成的固体聚合物电解质膜的性能。采用聚合物共混技术制备了一系列复合聚合物电解质膜,通过扫描电子显微镜(SEM)和X射线衍射(XRD)对膜的形态和晶体结构进行了分析,并详细考察了离子电导率、孔隙率和吸液率等性能。PS和PMMA的加入降低了PEO的结晶度,提高了它的拉伸强度。结果表明,当PEO/PS/PMMA膜中各组成质量比为75:10:15时,聚合物电解质膜具有优良的性能,膜的离子电导率为3.56×10^(-4)S·cm^(-1),拉伸强度为11.56MPa,孔隙率达到57.6%,吸液率高达164.3%。

关键词：离子电池聚合物电解质离子电导率聚环氧乙烷聚苯乙烯聚甲基丙烯酸甲酯