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Ecological Insight into the Deterioration of Autotrophic Nitrogen Removal in One-Stage Partial Nitritation and Anammox System During environmental Disturbance

SSRN

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SSRN 2023年

作者： Li, Zhaoyang Zhang, Liang Peng, Yongzhen Li, Jialin National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing100124 China

The ecological understanding of a one-stage partial nitritation and anammox (PN/A) system, especially when facing environmental disturbances, is beneficial for engineering optimization, but there remain deficiencies. In this study, we focus on the connection between the ecological characteristics and the performance of a one-stage PN/A during the disturbance. The disturbance caused an inevitable community succession of the microbial with decreased community diversity and complexity. During long-term stable operation, the community diversity and complexity recovered except the autotrophic nitrogen removal. A delayed response of the functional bacteria abundance was observed compared to the decreased autotrophic nitrogen removal performance of the one-stage PN/A. As the experimental results revealed, the ecological fluctuation of the community with decreasing resistance and resilience was the driving force that fatally collapsed the one-stage PN/A. The successional pattern of the one-stage PN/A community was conducive to the diagnosis, prediction, and optimization of the one-stage PN/A system. © 2023, The Authors. All rights reserved.

关键词： Deterioration

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Enhancing Anammox Bacteria Enrichment in an Integrated Fixed-Film Activated Sludge Partial Nitritation/Anammox Process Via Floc Retention Control

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SSRN 2023年

作者： Zhang, Liang Yang, Mengqi Li, Jialin Li, Zhaoyang Peng, Yongzhen National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing100124 China

A promising technology for partial nitritation/anammox (PN/A) processes to treat ammonium wastewater is Integrated fixed-film activated sludge (IFAS). For practical applications, achieving efficient enrichment of anammox bacteria (AnAOB) remains a challenge. In the IFAS-PN/A process, flocs were temporarily retained for 14 days, resulting in dynamic variations in the MLSS of the flocs (from 4000 to 6000 to 4000 mg/L). When the MLSS returned to 4000 mg/L, the nitrogen removal rate (NRR) was increased from 0.91 to 3.20 kg N/(m3·d). Moreover, the maximum specific growth rate (μ) of AnAOB increased from 0.009 to 0.072 d-1. Microbial community analysis revealed enhanced bacterial species richness and microbial population diversity with an increase in initial MLSS. Overall, the regulation of flocs significantly influenced the microbial community structure of both flocs and biofilms leading to improved nitrogen removal efficiency in the IFAS-PN/A system. © 2023, The Authors. All rights reserved.

关键词： Wastewater treatment

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High-Rate Nitrogen Removal by Partial Nitritation/Anammox with a Single-Stage Membrane-Aerated Biofilm Reactor

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SSRN 2023年

作者： Song, Zixuan Hao, Shiwei Zhang, Li Fan, Xuepeng Peng, Yongzhen National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing100124 China

In this study, a membrane aerated biofilm reactor (MABR) coupled partial nitritation/anammox (PN/A) system was established for high-rate nitrogen removal. Results showed that the nitrogen removal efficiency of 90.34% was finally obtained when influent ammonia was increased from 150 mg L-1 to 300 mg L-1. Based on the fluorescence spectroscopy technology, the raised hydrophobicity tryptophan in extracellular polymeric substances (EPS) promoted biofilm formation and bacteria aggregation. 16S rRNA gene amplicon sequencing revealed that the propagation of AOB and AnAOB was also enhanced by ammonia (Nitrosomonas and Candidatus Brocadia increased by 6.02% and 10.06% in biofilm, respectively), which further facilitated nitrogen removal efficiency. Furthermore, the proliferation of key functional genes involved in partial nitritation and anammox, especially hao and nirK (up-regulated by 1.31 and 1.26 times), was conducive to accelerating the electron generation and consumption. Therefore, raising influent ammonia content intensified microbial electron transfer behavior and high-rate nitrogen metabolism. © 2023, The Authors. All rights reserved.

关键词： Ammonia

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A carbon-rich g-C_(3)N_(4) with promoted charge separation for highly efficient photocatalytic degradation of amoxicillin

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Chinese Chemical Letters 2021年第9期32卷 2787-2791页

作者： Dan Huang Xianbo Sun Yongdi Liu Haodong Ji Wen Liu Chong-Chen Wang Weiyu Ma Zhengqing Cai National Engineering Laboratory for High-concentration Refractory Organic Wastewater Treatment Technologies East China University of Science and TechnologyShanghai 200237China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation School of Environment and Energy EngineeringBeijing University of Civil Engineering and ArchitectureBeijing 100044China

A novel carbon-rich g-C_(3)N_(4) nanosheets with large surface area was prepared by facile thermal polymerization method using urea and 1,3,*** of carbon-rich functional groups were introduced into the surface layers of g-C_(3)N_(4),which constructed the built-in electric field(BIEF)and resulted in improved charge separation;therefore,the carbon-rich g-C_(3)N_(4) displayed superior photocatalytic activity for amoxicillin degradation under solar *** contaminant degradation mechanism was proposed based on radical quenching experiments,intermediates analysis and density functional theory(DFT)***,the reusing experiments showed the high stability of the material,and the amoxicillin degradation under various water matrix parameters indicated its high applicability on pollutants treatment,all of which demonstrated its high engineering application potentials.

关键词： Carbon-rich g-C_(3)N_(4) Photocatalysis Built-in electron field Charge separation

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Extraction of phenol from water by primary amine primene JMT

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Emerging Contaminants 2022年第1期8卷 90-96页

作者： Qingjie Wang Yanchun Shi Deling Yang Pengge Ning Research Beijing Engineering Research Centre of Process Pollution Control National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyDivision of Environment Technology and EngineeringInstitute of Process EngineeringChinese Academy of ScienceBeijing100190China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesNo.18Shuangqing RoadBeijing100085China

In this work,liquid-liquid extraction of phenol from aqueous solutions using primary amine Primene JMT(Primene®JM-T)was *** extraction capability of Primene®JM-T with different diluents,including 3-heptanone,sulfonated kerosene,methyl isobutyl ketone,n-octanol,toluene and petroleum ether was *** experimental results indicated that the distribution coefficient of phenol extracted using Primene®JM-T that was diluted in 3-heptanone could reach 101.74 under the pH of ***,the extraction reaction was exothermic(enthalpy change for the extraction reaction(DrHm)was21.03 kJ/mol).High temperature showed a negative effect on the extraction of *** results also showed that adding mineral salt was conducive to the extraction process,and the extraction effi-ciency fell in the descending order of:(NH_(4))_(2)SO_(4)>NaCl>NH_(4)*** empirical correlations were put forward to quantitatively describe the salting ***,the equilibrium constants of phenol extraction using Primene®JM-T were calculated to be 78.2 L/*** phenol was extracted using Primene®JM-T with the possible stoichiometric formula of:[RNH_(3)^(+),PhOH]_(org),where R represents the alkyl group of the amine.

关键词： Primene®JM-T Phenol Liquid-liquid extraction Distribution coefficient

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Prediction of toxicity and identification of key components for complex mixtures containing hormetic components

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science of the Total environment 2024年 957卷 177733页

作者： Tao, Meng-Ting Ding, Ting-Ting Wang, Ze-Jun Gu, Zhong-Wei Liu, Shu-Shen Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology School of Environmental Science and Engineering Suzhou University of Science and Technology Suzhou215009 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Mixtures containing hormetic components are likely to induce hormesis. However, due to the presence of stimulatory effects, predicting the toxicity of such mixtures and identifying their key components face challenges. This study investigated the complex relationship between the stimulatory effects of individual components and their mixtures, focusing on predicting mixture toxicity and identifying key components influencing this toxicity. Sixteen chemicals, commonly found in disinfectants and hand sanitizers, were selected to construct a complex mixture system containing hormetic components. Using Vibrio qinghaiensis sp.-Q67 as an indicator organism, the study employed microplate toxicity tests to collect toxicity data for individual chemicals and their mixtures. The independent action (IA) and back-propagation neural network (BPNN) methods were utilized to predict mixture toxicity, while global sensitivity analysis (GSA) identified key components affecting toxicity. Results revealed that six of the sixteen chemicals exhibited time-dependent hormesis. However, when combined into mixtures, the stimulatory effects observed in individual components tended to diminish or disappear, leading to higher overall toxicity, likely due to synergism. Traditional models like the IA significantly underestimated mixture toxicity, whereas the BPNN model demonstrated superior predictive performance. GSA identified five key components, and changes in the levels of some non-toxic components significantly altered the toxicity of the mixtures. Moreover, increasing the levels of certain key components could either increase or decrease the mixture's toxicity, making the strategy of reducing their concentration to control mixture toxicity ineffective. This study revealed the potential of neural networks in predicting the toxicity of mixtures containing hormetic components and the possible characteristics of the effects of key components on mixture toxicity. © 2024 Elsevier B.V.

关键词： Sensitivity analysis

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Unraveling natural aging-induced properties change of sludge-derived hydrochar and enhanced cadmium sorption site heterogeneity

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Biochar 2022年第1期4卷 615-634页

作者： Bingyu Wang Cenyao Shang Huifang Xie Haijun Sun Qiang Zhang Lihong Xue Filip M.G.Tack Deyi Hou Yanfang Feng Jörg Rinklebe Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Agro-Environment in Downstream of Yangtze Plain National Agricultural Experiment Station for Agricultural EnvironmentMinistry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China Co-Innovation Center for Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037China Department of Green Chemistry and Technology Ghent University9052 GhentBelgium School of Environment Tsinghua UniversityBeijing 100084China School of Architecture and Civil Engineering Institute of Foundation EngineeringWaterand Waste-ManagementLaboratory of Soiland Groundwater-ManagementUniversity of WuppertalPauluskirchstraße 742285 WuppertalGermany

Hydrochar has potential applications in soil improvement and heavy metal *** would undergo the process of aging when introduced into the soil,altering its ***,recent studies have focused mainly on the artificial aging of hydrochar,which could not reveal the cumulative effect of multiple environmental ***,the periodical monitoring of the property and sorption behavior of hydrochar after amending soils is necessary to better understand the multifaceted mechanisms associated with the natural aging of *** study selected the sludge-derived hydrochar(SLHC)as a typical hydrochar and applied a 16-month rice-wheat-rice rotation to mimic the natural aging of hydrochar,focusing on changing properties and cadmium(Cd)sorption and literature contrast between aging strategies and biochar *** porosity,O abundance,and ash content of 16-month aged SLHC increased by 37%,47%,and 8.5%,respectively,facilitating Cd sorption due to surface complexation,pore sorption,and *** sorption percentage of Cd to SLHC was in the range of 11-14%for SLHC-A0 and increased to 17-31%for SLHC-A4 and 20-32%for SLHC-A16 after natural *** natural aging of SLHC induced by ash content played an essential role in Cd sorption site *** regression analysis showed that aging strategies on sorption behavior significantly differed between ***,studies involving natural aging with multiple environmental factors are preferred over those involving chemical or biological *** studies should continue to explore the mechanisms of natural aging-induced heavy metal sorption between hydrochar and *** results improve insights to appraise the potential of SLHC as soil amendments to alleviate the adverse effects of heavy metal contamination and provide an essential basis for researchers and staff in soil management and environmental prevention.

关键词： Sludge-derived hydrochar Hydrothermal carbonization Natural aging Physicochemical properties Sorption behavior Cadmium

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Research progress in the treatment of high salt and high concentration organic industrial wastewater

Journal of Biotech Research

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Journal of Biotech Research 2024年 17卷 298-304页

作者： Jiang, Wei Lu, Qinfang Jeong, Byung-gon Zhang, Yangfan Xie, Bin Xiao, Xin Lai, Shirong School of Chemistry and Environment Jiujiang University Jiangxi Jiujiang China Key Laboratory of Industrial Ecological Simulation and Environmental Health in the Yangtze River Basin in Jiangxi Province Jiujiang University Jiangxi Jiujiang China Department of Environmental Engineering Kunsan National University Gunsan Korea Republic of School of Architecture and Planning Jiujiang University Jiangxi Jiujiang China Science Environmental Protection Technology Thain Co. Ltd. Jiangxi Jiujiang China

Due to the high content of dissolved organic matter in high-salinity organic wastewater, the physicochemical treatment method is costly and difficult to achieve the desired purification effect. The biological treatment method has the advantages of economy, high efficiency, and harmlessness. Therefore, the biological method is currently the mainstream organic wastewater treatment technology. However, it is difficult to achieve high-salt organic wastewater treatment standards with traditional biological and physical-chemical treatment technologies. This article reviewed the research status of high salt and high concentration organic industrial wastewater treatments and suggested that research could be conducted on the optimization selection, biological carrier enhancement, reactor process optimization, and other aspects of high-efficiency anaerobic reactors in combination with current research hotspots to better solve and improve the problems existing in different wastewater processes. © (2024), (Bio Tech System). All rights reserved.

关键词： Optimization

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巯基化活性炭靶向捕获电子废弃物酸浸液中金离子

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science Bulletin 2023年第11期68卷 1095-1099,M0003页

作者：李敏姚子威陈以頔李德伟邵家创董浩孟竹杨利明任伟罗旭彪邵鹏辉 Department of Chemical Engineering Chongqing University of Science and TechnologyChongqing 401331China National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China

电子废弃物中回收金兼具污染治理、资源循环双重目的,是环境高水平保护、经济高质量发展的必要要求.吸附法是湿法回收金属资源的有效方法,但含金电子废弃物的浸出液都呈现强酸性和强氧化性;目前从该体系中靶向捕捉金离子仍存在巨大挑战... 详细信息

电子废弃物中回收金兼具污染治理、资源循环双重目的,是环境高水平保护、经济高质量发展的必要要求.吸附法是湿法回收金属资源的有效方法,但含金电子废弃物的浸出液都呈现强酸性和强氧化性;目前从该体系中靶向捕捉金离子仍存在巨大挑战.本文报道了一种巯基功能化的秸秆基活性炭,在强酸、强氧化性体系中实现了金离子的靶向捕获,其最大吸附容量可达5309 mg/g,选择性系数达到1.21×10^(6);吸附后的材料经煅烧得到金单质,其纯度高达99.9%.机理研究表明,巯基电位选择性诱导金离子优先还原,并促发了吸附-还原过程自发进行.由于量子尺寸效应,被还原的金簇在炭材料表面积累,处于“激发状态”的纳米金簇,将进一步诱导还原体系中金离子,呈现一种自促进作用.研究实现了复杂苛刻酸浸液中金元素的靶向回收,为电子废弃物高质循环利用提供了新思路.

关键词：电子废弃物强氧化性污染治理资源循环循环利用选择性系数量子尺寸效应金离子

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Podarkeopsis chinensis sp. nov. (Annelida, Hesionidae) from southeastern China

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Zookeys 2023年第1173期2023卷 339-355页

作者： Tong, Shan Yang, Deyuan Qiu, Jian-Wen Ke, Caihuan Wang, Zhi State Key Laboratory of Marine Environmental Science College of Ocean and Earth Sciences Xiamen University Xiamen 361102 China College of Marine Science and Technology Zhejiang Ocean University Zhoushan 316022 China National Taiwan Ocean University Keelung 202301 Taiwan College of the Environment and Ecology Xiamen University Xiamen 361102 China Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) Guangzhou 511458 China Department of Biology Hong Kong Baptist University Hong Kong

Podarkeopsis chinensis sp. nov. (Annelida, Hesionidae) is described based on specimens collected from the coast of southeast China. It is the first Podarkeopsis species described from the Indo-Pacific, although there are already nine valid Podarkeopsis species known from other parts of the world. This new species can be distinguished from the other Podarkeopsis species in having a palpostyle as long as the palpophore and double aciculae in both notopodia and neuropodia, and in bearing bifid furcate chaetae which have a smooth base on the shorter tine. A phylogenetic analysis based on the concatenated sequences of five gene fragments (COI, 16S rRNA, 18S rRNA, 28S rRNA, and histone H3) from 18 specimens of P. chinensis sp. nov. showed that they formed a monophyletic clade that is sister to P. levifuscina. K2P genetic distances indicated that the four gene fragments (COI, 16S rRNA, 18S rRNA, and 28S rRNA) of P. chinensis sp. nov. diverged from the corresponding sequences of the closest related species of Podarkeopsis in GenBank and BOLD Systems by 21.1–27.5%, 20.3–23.1%, 0.1–0.2%, and 2.1–3.2%. An identification key is provided for species in the genus Podarkeopsis. © Shan Tong et al.

关键词： Identification key Indo-Pacific molecular phylogeny morphology new species polychaete systematics

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