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Synchronous vanadium bio-reduction/detoxification/recovery and nitrogen attenuation in a membrane aerated biofilm reactor

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Environmental Pollution 2025年 372卷 126095页

作者： Sun, Zhiye Li, Baoan Liu, Jun School of Environmental and Chemical Engineering Heilongjiang University of Science and Technology Harbin150022 China Carbon Neutrality Interdisciplinary Science Centre Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution College of Environmental Science and Engineering Nankai University Tianjin300350 China State Key Laboratory of Marine Resource Utilization in South China Sea School of Marine Science and Engineering Hainan University Hainan Haikou570228 China

The presence of both pentavalent vanadium [V(Ⅴ)] and nitrogen in wastewaters from vanadium smelting poses significant environmental challenges. However, it remains little in the way of continuous flow biological reactor to concurrently eliminated V(Ⅴ) and nitrogen in wastewaters. Herein, membrane-aerated biofilm reactor (MABR) system was designed to achieve simultaneous nitrification and denitrification (SND) alongside biological reduction, detoxification, and recovery of vanadium. Vanadium and nitrogen removal performances, solid-state characterization, microbial compositions and functional genes, and the mechanism related to the metabolism of vanadium and nitrogen were illuminated. Notably, we identified a potential role for biofilm-derived "secretion" in the transformation of V(Ⅴ) and nitrogen. Our findings revealed that the system achieved SND efficiency of 98.00 ± 0.57 % and removed 91.10 ± 3.60 % of total vanadium (TV) even at high influent V(Ⅴ) concentrations in continuous flow stage. Batch experiments implied that the conversion of NH4+-N was the limiting process of nitrogen removal in MABR system, and the extracellular polymeric substances (EPS) might play an important role in the conversion of V(Ⅴ) and nitrogen. V(Ⅴ) was reduced to V(Ⅳ), which was immobilized to biofilm and "secretion" by microbial surface functional groups, including C-O, O-C=O and -OH. Acinetobacter, Dechlorobacter, Denitratisoma and Nitrospira were verified as microbes associated with V(Ⅴ) and nitrogen metabolism. The abundance of functional genes pertaining to electron donor, electron transport, and electron acceptor systems increased under high V(V) stimulation. Collectively, the cooperation of biofilm and "secretion" ensured the intensive removal of vanadium and nitrogen. This study provides new insights into the concurrent removal of heavy metal and environmental nutrient. © 2025

关键词： Biofilms

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Characterization of the core microflora and nutrient composition in packaged pasteurized milk products during storage

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Food Science and Human Wellness 2023年第4期12卷 1279-1286页

作者： Ruixue Ding Shanshan Yang Lijuan Geng Yumeng Liu Baoping He Liyun Liu Xiqing Yue Rina Wu Junrui Wu Liaoning Engineering Research Center of Food Fermentation Technology Shenyang Key Laboratory of Microbial Fermentation Technology InnovationCollege of Food ScienceShenyang Agricultural UniversityShenyang 110866China Shenyang Institute for Food and Drug Control Shenyang 110122China Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010080China China Mengniu Dairy Co. Ltd.Hohhot 010000China

Pasteurized milk contains complex microbial communities affected by sterilization and storage *** complex microflora may be the possible reason that pasteurized dairy products are highly prone to *** this study,packaged pasteurized milk products collected from dairy processing factories in China were stored at 0,4,10,15,and 25℃ for 0−15 days and subjected to microbial identification using high-throughput ***,6 phyla and 44 genera were identified as the dominant ***,the changes in nutritional composition of the pasteurized milk,including in 16 free amino acids,7 taste values,and 8 chemical constituents,were analyzed using principal component and multi-factor *** Pearson correlation analysis identified Pseudomonas,Aeromonas,Paenibacillus,and Serratia genera as the core functional microbiota that significantly affects the nutritional composition of pasteurized ***,the results provide a comprehensive understanding of the safety and shelf-life of stored pasteurized milk.

关键词： Pasteurized milk Storage conditions Microbiota High-throughput sequencing(HTS)

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Degradation of tetracycline hydrochloride by ultrafine TiO_(2) nanoparticles modified g-C_(3)N_(4) heterojunction photocatalyst:Influencing factors,products and mechanism insight

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Chinese Chemical Letters 2022年第3期33卷 1337-1342页

作者： Bin Zhang Xu He Chengze Yu Guocheng Liu Dong Ma Chunyue Cui Qinghua Yan Yingjie Zhang Guangshan Zhang Jun Ma Yanjun Xin Qingdao Engineering Research Center for Rural Environment Water Resources Protection and Utilization Center for Rural AreasQingdao Agricultural UniversityQingdao 266109China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China School of Marine Science and Technology Sino-Europe Membrane Technology Research Institute Harbin Institute of TechnologyWeihai 264209China

The unique heterojunction photocatalyst of graphite carbon nitride (g-C_(3)N_(4)) modified ultrafine TiO_(2) (g-C_(3)N_(4)/TiO_(2)) was successfully fabricated by electrochemical etching and co-annealing method. However, the effects of various environmental factors on the degradation of TC by g-C_(3)N_(4)/TiO_(2) and the internal reaction mechanism are still unclear. In this study, the effects of initial pH, anions, and cations on the photocatalytic degradation of tetracycline hydrochloride (TC) by g-C_(3)N_(4)/TiO_(2) were systematically explored, and the scavenging experiment and intermediate detection were conducted to better reveal the mechanism on photocatalytic degradation of TC. The results showed that the removal efficiency of photocatalytic degradation of TC by g-C_(3)N_(4)/TiO_(2) could reach 99.04% under Xenon lamp irradiation within 120 min. The unique g-C_(3)N_(4)/TiO_(2) heterojunction photocatalyst showed excellent photocatalytic performance for the degradation of TC at pH 3~7, and possesses outstanding anti-interference ability to NO_(3)^(-), Cl^(-), Na^(+), Ca^(2+) and Mg^(2+) ions in natural waters during the photocatalytic degradation TC process. Superoxide radicals (O_(2)^(·-)) and hydroxyl radicals (^(·)OH) were proved as the main reactive species for TC degradation, and the possible mechanism of the unique photocatalytic system for g-C_(3)N_(4)/TiO_(2) was also proposed. The above results can provide a reliable basis and theoretical guidance for the design and application of visible photocatalyst with high activity to degrade the actual wastewater containing TC.

关键词： Photocatalytic TiO_(2) G-C3N4 Tetracycline hydrochloride Mechanism

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An Improved PI controller for Stiction Compensation of control Valves in Process Industry

An Improved PI Controller for Stiction Compensation of Contr...

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第43届中国控制会议

作者： Dong Yang Xun Lang Jiande Wu Yumin Lang Lei Xie Hongye Su Department of Electronic Engineering School of Information Yunnan University Yunnan Key Laboratory of Intelligent Systems and Computing Yunnan University State Key Laboratory of Industrial Control Technology Zhejiang University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

In the process industry, limit cycles are mostly induced by stiction-related nonlinearity in control valves, severely deteriorating control loop performance. Such problem highlights the importance of compensating for oscillations due to valve stiction. To this end, this work introduces an improved PI controller(IPIC) for stiction compensation, which retains the advantages of the traditional PI controller with fewer adjustment parameters. The enhancement involves nonlinear variation of the integral gain based on instantaneous error. Additionally, a differential evolution algorithm is utilized for controller *** to state-of-the-art methods in setpoint tracking, disturbance rejection, and robustness to parameter uncertainties, the proposed approach exhibits superior performance.

关键词： Stiction Limit Cycle Nonlinear PI controller Differential Evolution Algorithm

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A Fault Diagnosis Method of Actuator via Single Class Probability Density Learning 18th

A Fault Diagnosis Method of Actuator via Single Class Prob...

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18th Chinese Intelligent Systems Conference, CISC 2022

作者： Wang, Na Li, Yang Peng, Kun School of Control Science and Engineering Tiangong University Tianjin300387 China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment University Tianjin300387 China Key Laboratory of low light level electromechanical system technology of Ministry of education Tianjin University Tianjin300387 China

ISBN: (纸本)9789811962028

A fault diagnosis method via Single Class Probability Density Learning for the actuator is proposed in this paper. Firstly, for the normal current data of the original actuator, the Fuzzy c-Means approach is combined with the matrix transformation. Then the Single Class Learning process is realized. Thus the distribution centers of the normal current data and the Probability Density control Threshold are obtained. On this basis, the fault diagnosis model is established. Secondly, for the actuator data to be tested, the Principal Component Analysis is adopted to reduce their dimension. Then the Affinity Propagation Clustering method is improved and the new centers of clustering are acquired by the test data. Additionally, the original distribution centers of current are compared with the new centers of clustering. So the actuator fault is diagnosed quickly. Finally, by some actuator measured data simulation, the effectivity of the proposed approach is verified in construct with the traditional methods. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Failure analysis

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key Roles of Nucleation and Impurity Migration Behavior in Layer Melt Crystallization: Case Study of 4,5-Dimethyl-1,3-dioxol-2-one

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Crystal Growth & Design 2023年第2期24卷 722-733页

作者： Shijie Xu Kaili Zhang Baifu Liu Yanfei Wang Tianjin Key Laboratory of Brine Chemical Engineering and Ecological Utilization of Resources Tianjin Engineering Center of Marine Chemical Engineering & Technology College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 China

In melt crystallization, how the cooling rate and initial concentration affect metastable zone width (MSZW), thus altering the impurity distribution coefficient, remains elusive. To explore the above problem, the layered melting crystallization of 4,5-dimethyl-1,3-dioxol-2-one is taken as a research case here. In this work, first, we show that when the composition decreases or the cooling rate increases, the value of interfacial energy (γ) increases and the pre-exponential factor (A) decreases, leading to a wider MSZW. Second, the faster the cooling rate or the higher the impurity content of the raw material, more impurity will be entrapped in the crystal layer, leading to a larger impurity distribution coefficient. More interestingly, we found that the relationship betweenKBSandKASis linear forKAS= 0.422 to 0.875 within the cooling rate 1–40 K/h, which increases with the increase of cooling rate and tends to be consistent. Finally, we highlight that the essential relationship between the impurity distribution coefficient before and after sweating is a straight line and unless the impurity distribution in the cooling stage reaches 0.377, it is impossible to obtain the product that approaches 100% purity through sweating.

关键词： Crystallization Crystals Impurities Nucleation Partition coefficient

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Event-Triggered-Based Privacy-Preserving Finite-Time Flocking control for Networked Multi-Agent Systems 63

Event-Triggered-Based Privacy-Preserving Finite-Time Flockin...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Yue, Jiangfeng Qin, Kaiyu Shao, Jinliang Shi, Mengji Li, Weihao Zheng, Wei Xing University of Electronic Science and Technology of China School of Aeronautics and Astronautics Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu611731 China University of Electronic Science and Technology of China School of Automation Engineering Chengdu611731 China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing100089 China Western Sydney University School of Computer Data and Mathematical Sciences SydneyNSW2751 Australia

ISBN: (纸本)9798350316339

Drawing inspiration from the dynamics of biological groups, flocking behavior has captivated interest due to its adaptive, self-organizing, and resilient characteristics. However, the presence of numerous agents in an open network environment raises concerns regarding the potential for information leakage during flocking movements. To address this issue, we present a decentralized output mapping function, executed independently by each individual agent, to ensure the maintenance of flocking behavior, including velocity alignment, cohesion and collision avoidance. Additionally, to enhance resource efficiency and convergence speed, an event-triggered mechanism is employed to mitigate the excessive consumption of bandwidth and computation resources in traditional flocking control algorithms. Moreover, the designed finite-time controller facilitates rapid convergence of flocking behavior. Finally, the efficacy of our proposed approach is corroborated through numerical simulation experiments. © 2024 IEEE.

关键词： Multi agent systems

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Design and Analysis of a Single Lower Limb Rehabilitation Exoskeleton Robot

Design and Analysis of a Single Lower Limb Rehabilitation Ex...

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2023 International Annual Conference on Complex Systems and Intelligent Science, CSIS-IAC 2023

作者： Li, Ang Luan, Fujin Zhang, Faxiang Lu, Sheng Gao, Guanbin Liu, Meihong Kunming University of Science and Technology Faculty of Mechanical and Electrical Engineering Kunming650500 China Kunming University of Science and Technology Yunnan International Joint Laboratory of Intelligent Control and Application of Advanced Equipment Faculty of Mechanical and Electrical Engineering Kunming650500 China Yunnan Key Laboratory of Digital Orthopedics The First People's Hospital of Yunnan Province Kunming650034 China

ISBN: (纸本)9798350309003

Exoskeleton robots are a novel type of rehabilitation device. Existing exoskeleton robots typically provide assistance and rehabilitation training to both lower limbs simultaneously, which is not suitable for patients with unilateral limb movement impairments caused by hemiplegia, trauma, and other conditions. In this study, we designed a single lower limb rehabilitation exoskeleton robot that enables the affected limb to follow the healthy limb during rehabilitation training. Firstly, we applied biomechanics principles to design the exoskeleton robot. The backpack surface, the angles of hip and knee joint components are designed to make them conform better to the human body. Secondly, to obtain the positions of the exoskeleton's links in joint space and the required joint torques, we established the kinematic and dynamics models of the exoskeleton using the Denavit-Hartenberg method and Lagrange's equations, respectively. Finally, we conducted simulations by wearing the exoskeleton on a human lower limb model using AnyBody software. The simulations included both passive exoskeleton mode and active exoskeleton mode, which simulated the biological forces on the human body during exoskeleton-assisted movements. The results indicated that, while wearing the exoskeleton, the muscle forces and joint torques at the hip and knee joints during the flexion/extension cycle of the lower limb were significantly reduced, with reduced fluctuations. This suggests that the exoskeleton provides good wearing comfort and stable assistive effects. © 2023 IEEE.

关键词： Kinematics

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Deep-sea Nodule Mineral Image Segmentation Algorithm Based on Pix2PixHD

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Computers, Materials & Continua 2022年第10期73卷 1449-1462页

作者： Wei Song Haolin Wang Xinping Zhang Jianxin Xia Tongmu Liu Yuxi Shi School of Information and Engineering Minzu University of ChinaBeijing100081China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourceGuangzhou510300China National Language Resource Monitoring&Research Center of Minority Languages Beijing100081China School of Ocean Science China University of GeosciencesBeijing100191China Department of Buoy Engineering South China Sea Marine Survey and Technology CenterGuangzhou510300China Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewarkNew Jersey07102USA

Deep-sea mineral image segmentation plays an important role in deep-sea mining and underwater mineral resource monitoring and *** application of artificial intelligence technology to deep-sea mining projects can effectively improve the quality and efficiency of *** existing deep learning-based underwater image segmentation algorithms have problems such as the accuracy rate is not high enough and the running time is slightly *** order to improve the segmentation performance of underwater mineral images,this paper uses the Pix2PixHD(Pixel to Pixel High Definition)algorithm based on Conditional Generative Adversarial Network(CGAN)to segment deep-sea mineral *** model uses a coarse-to-fine generator composed of a global generation network and two local enhancement networks,and multiple multi-scale discriminators with same network structures but different input pictures to generate highquality *** test results on the deep-sea mineral datasets show that the Pix2PixHD algorithm can identify more target minerals under certain other *** evaluation index shows that the Pix2PixHD algorithm effectively improves the accuracy rate and the recall rate of deep-sea mineral image segmentation compared with the CGAN algorithm and the U-Net *** is important for expanding the application of deep learning techniques in the field of deep-sea exploration and mining.

关键词： Deep-sea mineral image segmentation generative adversarial network

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Gastrodin ameliorates exercise-induced fatigue via modulating Nrf2 pathway and inhibiting inflammation in mice

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Food Bioscience 2023年第1期51卷 745-761页

作者： Yaping Zhou Qi Wu Wen Yu Fan Ye Yunyun Cao Otobong DAkan Xiuxiu Wu Tiantian Xie Han Lu Fuliang Cao Feijun Luo Qinlu Lin National Engineering Center for Deep Process of Rice and Byproducts Hunan Provincial Key Laboratory of Grain-oil Deep Process and Quality ControlHunan Key Provincial Laboratory of Processed Food for Special Medical PurposeCollege of Food Science and EngineeringCentral South University of Forestry and TechnologyNo.498Shaoshan RoadChangsha410004HunanPR China Co-innovation Center for the Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNo.159Longpan RoadNanjing210037JiangsuPR China

Gastrodia elata *** traditional Chinese medicine used to alleviate fatigue,but its underlying mechanism is still *** study explored the anti-fatigue mechanism of gastrodin by exercise-induced fatigue model and network *** study found that gastrodin(200 mg/kg/day)had significant anti-fatigue effects in C57BL/6J mice based on mouse energy and endurance *** could effectively ameliorate biochemical indexes in the fatigue *** putative targets of“Gastrodin”and“Fatigue”were obtained by integrating multiple databases,and a virtual network containing 220 interactive targets was constructed by STRING and *** annotation analysis of these targets by g:Profiler showed that they mainly contribute to the cellular processes,protein binding,and other functions and participate in metabolic pathways,cancer pathways,PI3K-Akt signaling pathway,*** found that oxidation and inflammatory factors played an important role in the virtual network of gastrodin anti-fatigue,which was supported by microarray dataset analysis and a molecular docking ***,real time-quantitative PCR and Western blot analysis indicated that gastrodin could promote the activation of the Nrf2 signal pathway,which could activate HO-1 and NQO1;gastrodin also could down-regulate the expressions of IL-1β,TNF-α,and *** summary,gastrodin can ameliorate exercise-induced fatigue by modulating the Nrf2 pathway and inhibiting expressions of inflammatory factors,this provides a new clue for the development of gastrodin-functional foods or anti-fatigue drugs.

关键词： Anti-fatigue Gastrodin Network pharmacology Molecular mechanism Nrf2 signaling pathway

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