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温度对厌氧膜生物反应器处理生活污水效能的影响

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环境工程学报 2024年第5期18卷 1240-1247页

作者：焦城璠张嘉雯赵鹤翔李倩陈荣李玉友西安建筑科技大学陕西省环境工程重点实验室西安710055 华陆工程科技有限责任公司西安710056 东北大学工程研究生院土木与环境工程系日本仙台980-8579

为探明温度对厌氧膜生物反应器处理实际生活污水效能的影响,本研究考察了在不同温度(25、20和15℃)及水力停留时间(hydraulic retention time,HRT)(12 h和8 h)下,AnMBR的产甲烷效能以及膜污染特性。结果表明,当温度为25℃时,COD去除率达... 详细信息

为探明温度对厌氧膜生物反应器处理实际生活污水效能的影响,本研究考察了在不同温度(25、20和15℃)及水力停留时间(hydraulic retention time,HRT)(12 h和8 h)下,AnMBR的产甲烷效能以及膜污染特性。结果表明,当温度为25℃时,COD去除率达到81.9%,最高甲烷产率为0.21 L·g^(−1)。20℃时,系统的厌氧消化性能与25℃相比差异不大,但当温度下降到15℃时,COD去除率为73.5%,最高甲烷产率只有0.08 L·g^(−1)。微生物群落分析结果表明,乙酸营养型是主要的产甲烷途径,随着温度降低乙酸营养型产甲烷菌的丰度明显减少,因此,产甲烷菌活性降低是导致15℃时反应器厌氧消化性能下降的主要原因。当温度为25℃,反应器在HRT为8 h的膜污染速率是HRT为12 h的31.33倍。因此,在较低的运行温度下,系统难以实现在低HRT的长期稳定运行。膜阻力分析结果表明随着温度的降低,膜孔的有机物堵塞阻力占总阻力的比例有所增大,这是由于低温下胞外聚合物的增加所导致的。COD平衡结果表明,溶解性甲烷的释放量与甲烷的溶解性以及出水通量的大小有关。

关键词：实际生活污水厌氧膜生物反应器温度资源回收溶解性甲烷

Path Planning and Tracking Control for Parking via Soft Actor-Critic Under Non-Ideal Scenarios

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 181-195页

作者： Xiaolin Tang yuyou Yang Teng liu Xianke lin Kai Yang Shen li IEEE the College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China the Clinical Research Center and Medical Pathology Center Chongqing University Three Gorges HospitalChongqing UniversityWanzhou 404000 the Department of Automotive and Mechatronics Engineering Ontario Tech UniversityOshawa ON LIG OC5Canada the School of Civil Engineering Tsinghua UniversityBeijing 100084China

Parking in a small parking lot within limited space poses a difficult task. It often leads to deviations between the final parking posture and the target posture. These deviations can lead to partial occupancy of adjacent parking lots, which poses a safety threat to vehicles parked in these parking lots. However, previous studies have not addressed this issue. In this paper, we aim to evaluate the impact of parking deviation of existing vehicles next to the target parking lot(PDEVNTPL) on the automatic ego vehicle(AEV) parking, in terms of safety, comfort, accuracy, and efficiency of parking. A segmented parking training framework(SPTF) based on soft actor-critic(SAC) is proposed to improve parking performance. In the proposed method, the SAC algorithm incorporates strategy entropy into the objective function, to enable the AEV to learn parking strategies based on a more comprehensive understanding of the environment. Additionally, the SPTF simplifies complex parking tasks to maintain the high performance of deep reinforcement learning(DRL). The experimental results reveal that the PDEVNTPL has a detrimental influence on the AEV parking in terms of safety, accuracy, and comfort, leading to reductions of more than 27%, 54%, and 26%respectively. However, the SAC-based SPTF effectively mitigates this impact, resulting in a considerable increase in the parking success rate from 71% to 93%. Furthermore, the heading angle deviation is significantly reduced from 2.25 degrees to 0.43degrees.

关键词： Automatic parking control strategy parking deviation(APS) soft actor-critic(SAC)

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升流式厌氧污泥床处理二甲基甲酰胺废水研究

能源环境保护 2024年第1期38卷 159-166页

作者：张新政邓梓萱张涛胡勇陈荣李玉友李大鹏潘杨孔哲苏州科技大学环境科学与工程学院江苏苏州215009 同济大学环境科学与工程学院上海200092 南京工业大学环境科学与工程学院江苏南京211816 西安建筑科技大学环境与市政工程学院陕西西安710055 日本东北大学工学研究科宫城仙台980-8579

N,N-二甲基甲酰胺(DMF)作为有机溶剂在化工领域得到了广泛的应用。本研究通过对小试升流式厌氧污泥床(UASB)反应器处理高浓度DMF工业废水的实验进行评估。实验中,UASB在有限有机负荷率(OLR)范围1.57~9.59 kg COD/(m^(3)·d)下运行,将水... 详细信息

N,N-二甲基甲酰胺(DMF)作为有机溶剂在化工领域得到了广泛的应用。本研究通过对小试升流式厌氧污泥床(UASB)反应器处理高浓度DMF工业废水的实验进行评估。实验中,UASB在有限有机负荷率(OLR)范围1.57~9.59 kg COD/(m^(3)·d)下运行,将水力停留时间(HRT)由48 h缩短至8 h,去除效率优良,达到95%以上。利用经验方程对DMF废水处理过程的CO_(2)排放量和生物能源产生量进行了估算和评估,相比传统的活性污泥(CAS)工艺,UASB工艺具有明显优势,能够回收能源并减少CO_(2)排放,其正净能量潜力为0.061 kW·h/m^(3),同时还显著减少了6.18 kg/m^(3)的CO_(2)排放量。本研究的结果证明了UASB工艺在处理DMF废水方面的潜力和可行性,并促进了碳中和理念在废水处理中的推广。

关键词：厌氧消化 N N-二甲基甲酰胺 UASB 工业废水生物能源生产

Enhancement of thermophilic anaerobic digestion of thickened waste activated sludge by combined microwave and alkaline pretreatment

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Journal of Environmental Sciences 2011年第8期23卷 1257-1265页

作者： Yongzhi Chi yuyou li Xuening Fei ShaopoWang Hongying Yuan Tianjin Key laboratory of Aquatic Science and Technology Department of Environmental and Municipal Engineering Tianjin Institute of UrbanConstruction Tianjin 300384 China. Department of Environmental Science Graduate School of Environmental Studies Tohoku University Sendai 980-8579 Japan

Pretreatment of thickened waste activated sludge （TWAS） by combined microwave and alkaline pretreatment （MAP） was studied to improve thermophilic anaerobic digestion efficiency. Uniform design was applied to determine the combination of target temperature （110-210°C）, microwave holding time （1-51 min）, and NaOH dose （0-2.5 g NaOH/g suspended solids （SS）） in terms of their effect on volatile suspended solids （VSS） solubilization. Maximum solubilization ratio （85.1%） of VSS was observed at 210°C with 0.2 g-NaOH/g-SS and 35 min holding time. The effects of 12 different pretreatment methods were investigated in 28 thermophilic batch reactors by monitoring cumulative methane production （CMP）. Improvements in methane production in the TWAS were directly related to the microwave and alkaline pretreatment of the sludge. The highest CMP was a 27% improvement over the control. In spite of the increase in soluble chemical oxygen demand concentration and the decrease in dewaterability of digested sludge, a semi-continuous thermophilic reactor fed with pretreated TWAS without neutralization （at 170~C with 1 min holding time and 0.05 g NaOH/g SS） was stable and functioned well, with volatile solid （VS） and total chemical oxygen demand （TCOD） reductions of 28% and 18%, respectively, which were higher than those of the control system. Additionally, methane yields （L@STP/g-CODaded, at standard temperature and pressure （STP） conditions of 0°C and 101.325 kPa） and （L@STP/g VSadad） increased by 17% and 13%, respectively, comoared to the control reactor.

关键词： thickened waste activated sludge microwave pretreatment alkaline pretreatment thermophilic anaerobic digestion

IRE1α regulates the PTHrP-IHH feedback loop to orchestrate chondrocyte hypertrophy and cartilage mineralization

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Genes & Diseases 2024年第1期11卷 464-478页

作者： Mengtian Fan Nana Geng Xingyue li Danyang Yin yuyou Yang Rong Jiang Cheng Chen Naibo Feng li liang Xiaoli li Fengtao Luo Huabing Qi Qiaoyan Tan Yangli Xie Fengjin Guo Laboratory of Developmental Biology Department of Cell Biology and GeneticsSchool of Basic Medical ScienceChongqing Medical UniversityChongqing 400016China Laboratory of Stem Cells and Tissue Engineering School of Basic Medical ScienceChongqing Medical UniversityChongqing 400016China Department of Orthopedics The 1st Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Wound Repair and Rehabilitation Medicine State Key Laboratory of TraumaBurns and Combined InjuryTrauma CenterResearch Institute of SurgeryDaping HospitalArmy Medical UniversityChongqing 400042China

Cartilage development is controlled by the highly synergistic proliferation and differentiation of growth plate chondrocytes,in which the Indian hedgehog(IHH)and parathyroid hormone-related protein-parathyroid hormone-1 receptor(PTHrP-PTH1R)feedback loop is *** inositol-requiring enzyme 1a/X-box-binding protein-1 spliced(IRE1α/XBP1s)branch of the unfolded protein response(UPR)is essential for normal cartilage ***,the precise role of ER stress effector IRE1α,encoded by endoplasmic reticulum to nucleus signaling 1(ERN1),in skeletal development remains ***,we reported that loss of IRE1α accelerates chondrocyte hypertrophy and promotes endochondral bone ***1 acts as a negative regulator of chondrocyte proliferation and differentiation in postnatal growth *** deficiency interrupted PTHrP/PTH1R and IHH homeostasis leading to impaired chondrocyte hypertrophy and ***1s,produced by p-IRE1α-mediated splicing,binds and up-regulates PTH1R and IHH,which coordinate cartilage ***,ER stress cannot be activated normally in ERN1-deficient *** conclusion,ERN1 deficiency accelerates chondrocyte hypertrophy and cartilage mineralization by impairing the homeostasis of the IHH and PTHrP/PTH1R feedback loop and ER ***1 may have a potential role as a new target for cartilage growth and maturation.

关键词： Cartilage development ER stress ERN1 IHH PTHrP/PTH1R

A comprehensive simulation approach for pollutant bio-transformation in the gravity sewer

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Frontiers of Environmental Science & Engineering 2019年第4期13卷 179-190页

作者： Nan Zhao Huu Hao Ngo yuyou li Xiaochang Wang Lei Yang Pengkang Jin Guangxi Sun School of Environmental and Municipal Engineering Xi'an University of Architecture and TechnologyXi'an 710055China Centre for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of TechnologySydneyNSW 2007Australia Department of Civil and Environmental Engineering Tohoku UniversitySendaiMiyagi 980-8579Japan Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Presently, several activated sludge models (ASMs) have been developed to describe a few biochemical processes. However, the commonly used ASM neither clearly describe the migratory transformation characteristics of fermentation nor depict the relationship between the carbon source and biochemical reactions. In addition, these models also do not describe both ammonification and the integrated metabolic processes in sewage transportation. In view of these limitations, we developed a new and comprehensive model that introduces anaerobic fermentation into the ASM and simulates the process of sulfate reduction, ammonification, hydrolysis, acidogenesis and methanogenesis in a gravity sewer. The model correctly predicts the transformation of organics including proteins, lipids, polysaccharides, etc. The simulation results show that the degradation of organics easily generates acetic acid in the sewer system and the high yield of acetic acid is closely linked to methanogenic metabolism. Moreover, propionic acid is the crucial substrate for sulfate reduction and ammonification tends to be affected by the concentration of amino acids. Our model provides a promising tool for simulating and predicting outcomes in response to variations in wastewater quality in sewers.

关键词： Gravity sewer Modeling Pollutant transformation Biochemical reaction process

Cultivation of aerobic granular sludge in a conventional, continuous flow, completely mixed activated sludge system

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 324-333页

作者： Xi CHEN linjiang YUAN Wenjuan LU yuyou li Pei liU Kun NIE School of Environmental and Municipal Engineering Xi'an University of Architecture and Technology Xi'an 710055 China Department of Environmental Science Graduate School of Environmental Studies Tohoku University Sendai 980-8579 Japan

Aerobic granules were formed in a conven- tional, continuous flow, completely mixed activated sludge system （CMAS）. The reactor was inoculated with seed sludge containing few filaments and fed with synthetic municipal wastewater. The settling time of the sludge and the average dissolved oxygen （DO） of the reactor were 2 h and 4.2 mg. L 1, respectively. The reactor was agitated by a stirrer, with a speed of 250r·min^-1, to ensure good mixing . The granular sludge had good settleability, and the sludge volume index （SVI） was between 50 and 90 mL ·g ^-1. The laser particle analyzer showed the diameter of the granules to be between 0.18 and 1.25 mm. A scanning electron microscope （SEM） investigation revealed the predominance of sphere-like and rod-like bacteria, and only few filaments grew in the granules. The microbial community structure of the granules was also analyzed by polymerase chain reaction-denaturing gradient gel electro- phoresis （PCR-DGGE）. Sequencing analysis indicated the dominant species were α, β, and γ-Proteobacteria, Bacteroidetes, and Firmicutes. The data from the study suggested that aerobic granules could form, if provided with sufficient number of filaments and high shear force. It was also observed that a high height-to-diameter ratio of the reactor and short settling time were not essential for the formation of aerobic granular sludge.

关键词： aerobic granular sludge completely mixed activated sludge system (CMAS) continuous flow shear force filamentous bacteria polymerase chain reaction- denaturing gradient gel electrophoresis (PCR-DGGE)

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厌氧氨氧化:理论和工艺发展概述(代序言)

环境工程学报 2022年第2期16卷 375-380页

作者：薛意陈荣邢保山李玉友日本东北大学环境保全研究室 9808579 西安建筑科技大学陕西省环境工程重点实验室 710055 西安建筑科技大学西北水资源与环境生态教育部重点实验室 710055

为实现“碳中和”目标,低碳脱氮新技术的开发及其工程化应用成为污水处理领域的研究热点。污水生物脱氮的主要途径为传统的硝化反硝化反应,但其工程应用仍存在能耗高且难实现低碳化的问题。厌氧氨氧化(anaerobic ammonium oxidation,ana... 详细信息

为实现“碳中和”目标,低碳脱氮新技术的开发及其工程化应用成为污水处理领域的研究热点。污水生物脱氮的主要途径为传统的硝化反硝化反应,但其工程应用仍存在能耗高且难实现低碳化的问题。厌氧氨氧化(anaerobic ammonium oxidation,anammox)可在厌氧条件下,以氨氮为电子供体、亚硝氮为电子受体,实现氨氮和亚硝氮的同步脱除并生成氮气。与传统硝化反硝化工艺相比,基于厌氧氨氧化的新工艺可有效降低曝气成本、减少污泥产量及有机碳源需求量,是未来污水生物脱氮的重要发展方向。为更好地宣传该领域最新成果,《环境工程学报》编辑部邀请李玉友、刘思彤、陈荣3位教授组织了“厌氧氨氧化生物脱氮理论与技术发展”专题。本文梳理和总结厌氧氨氧化的发现过程、理论研究、工艺发展、工程应用及其新动态,并作为该专题的代序言。

关键词：厌氧氨氧化亚硝氮生物脱氮电子受体碳中和有机碳源电子供体低碳化

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics