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Quorum sensing regulation methods and their effects on biofilm in biological waste treatment systems: A review

Frontiers of Environmental Science & Engineering 2022年第7期16卷 47-59页

作者： Zhuqiu Sun Jinying Xi Chunping Yang Wenjie Cong Environmental Simulation and Pollution Control State Key Joint Laboratory School of EnvironmentTsinghua UniversityBeijing100084China State Environmental Protection Key Laboratory of Microorganism Application and Risk Control(SMARC) Beijing100084China Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming525099China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha410082China

Quorum sensing (QS) plays an important role in microbial aggregation control. Recently, the optimization of biological waste treatment systems by QS regulation gained an increasing attention. The effects of QS regulation on treatment performances and biofilm were frequently investigated. To understand the state of art of QS regulation, this review summarizes the methods of QS enhancement and QS inhibition in biological waste treatment systems. Typical QS enhancement methods include adding exogenous QS molecules, adding QS accelerants and cultivating QS bacteria, while typical QS inhibition methods include additions of quorum quenching (QQ) bacteria, QS-degrading enzymes, QS-degrading oxidants, and QS inhibitors. The specific improvements after applying these QS regulation methods in different treatment systems are concluded. In addition, the effects of QS regulation methods on biofilm in biological waste treatment systems are reviewed in terms of biofilm formation, extracellular polymeric substances production, microbial viability, and microbial community. In the end, the knowledge gaps in current researches are analyzed, and the requirements for future study are suggested.

关键词： Quorum sensing Biological waste treatment Biofilm formation

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Identification of pollution sources in rivers using a hydrodynamic diffusion wave model and improved Bayesian-Markov chain Monte Carlo algorithm

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Frontiers of Environmental Science & Engineering 2023年第7期17卷 91-105页

作者： Hailong Yin Yiyuan Lin Huijin Zhang Ruibin Wu Zuxin Xu Key Laboratory of Yangtze River Water Environment of Ministry of Education Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Fujian Provincial Key Laboratory of Green Building Technology Fujian Academy of Building Research Co.Ltd.Fuzhou 350108China

water quality restoration in rivers requires identification of the locations and discharges of pollution sources,and a reliable mathematical model to accomplish this identification is *** this paper,an innovative framework is presented to inversely estimate pollution sources for both accident preparedness and normal management of the allowable pollutant *** proposed model integrates the concepts of the hydrodynamic diffusion wave equation and an improved Bayesian-Markov chain Monte Carlo method(MCMC).The methodological framework is tested using a designed case of a sudden wastewater spill incident(i.e.,source location,flow rate,and starting and ending times of the discharge)and a real case of multiple sewage inputs into a river(i.e.,locations and daily flows of sewage sources).The proposed modeling based on the improved Bayesian-MCMC method can effectively solve high-dimensional search and optimization problems according to known river water levels at pre-set monitoring *** can adequately provide accurate source estimation parameters using only one simulation through exploration of the full parameter *** comparison,the inverse models based on the popular random walk Metropolis(RWM)algorithm and microbial genetic algorithm(MGA)do not produce reliable estimates for the two scenarios even after multiple simulation runs,and they fall into locally optimal *** much more water level data are available than water quality data,the proposed approach also provides a cost-effective solution for identifying pollution sources in rivers with the support of high-frequency water level data,especially for rivers receiving significant sewage discharges.

关键词： Identification of pollution sources waterquality restoration Bayesianinference Hydrodynamic model Inverseproblem

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Long-term leucine supplementation increases body weight in goats by controlling appetite and muscle protein synthesis under proteinrestricted conditions

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Animal Nutrition 2025年第1期20卷 404-418页

作者： Xiaokang Lv Aoyu Jiang Jinling Hua Zixin Liu Qiongxian Yan Shaoxun Tang Jinhe Kang Zhiliang Tan Jian Wu Chuanshe Zhou Chinese Academy of Sciences Key Laboratory of Agro-Ecological Processes in Subtropical Region National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Key Laboratory of Animal Nutrition&Physiology and MetabolismInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China College of Animal Science Anhui Science and Technology UniversityFengyang 233100China

An inadequate amino acid(AA)supply in animals under protein-restricted conditions can slow skeletal muscle *** translation can be activated by short-term leucine(Leu)stimulation;however,whether muscle mass increases under long-term Leu supplementation and how the gut and muscle respond to Leu supplementation are largely *** this study,we investigated if muscle mass increases with long-term Leu supplementation under protein-restricted *** identified changes in the link between the gut and muscles under different amino acid supply conditions,using goats as the study object.A total of 27 Xiangdong black male goats with average initial body weight(BW)of 10.88±1.22 kg were randomly divided into three dietary treatments:a normal protein diet(NP,14.24%crude protein[CP]);a low protein diet(LP,8.27%CP with supplemental 1.66%rumen-protected lysine[RPLys]and 0.09%rumen-protected methionine[RPMet]);and LP diet with rumen-protected Leu(RPLeu)(LP t RPLeu,8.75%CP with supplemental 1.66%RPLys,0.09%RPMet and 1.46%RPLeu).The animal trial lasted for 110 d,consisting of 20 d of adaptation and a 90 d of experimental *** results showed that long-term protein restriction increased gut tryptophan hydroxylase 1(TPH1)activity(P<0.001),tryptophan(Trp)catabolism(P<0.001),and 5-hydroxytryptamine(5-HT)synthesis(P<0.001),which all subsequently reduced goat ***-term Leu supplementation inhibited 5-HT synthesis(P<0.001),decreased Trp catabolism in the gut,and increased appetite in ***-term protein restriction enhanced jejunal and ileal branched-chain amino acid transferase(BCAT)(P<0.001)and branched-chain a-Keto acid dehydrogenase(BCKD)(P=0.048)activities,which increased branchedchain amino acid(BCAA)*** results showed that protein restriction decreased the intestinal mucosal expression of solute carrier family 1 member 5(SLC1A5)(P=0.032)and solute carrier family 7 member 5(SLC7A5)(P<0.001),reduced BCAA transport from the

关键词： Leucine Protein synthesis Tryptophan metabolism 5-Hydroxytryptamine Amino acid transport Goat

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Science China(Life Sciences) 2024年第9期67卷 1970-1988页

作者： Jiayi Yu Changbing Zheng Qiuping Guo Yulong Yin Yehui Duan Fengna Li CAS Key Laboratory of Agro-ecological Processes in Subtropical Region Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China College of Animal Science and Technology Hunan Agricultural UniversityChangsha 410128China

We previously demonstrated that lipopolysaccharide(LPS)injection-induced immune stress could impair muscle growth in weaned piglets,but the precise mechanisms behind this remain ***,we found that chronic immune stress induced by LPS resulted in a significant reduction of 36.86%in the total muscle mass of piglets at 5 d post-treatment compared with the control *** 1 d,prior to muscle mass loss,multiple alterations were noted in response to LPS *** included a reduction in the abundance of Bacteroidetes,an increase in serum concentrations of pro-inflammatory cytokines,compromised mitochondrial morphology,and an upregulation in the expression of dynamin-related protein 1(Drp1),a critical protein involved in mitochondrial *** highlight a strong negative correlation between Bacteroidetes abundance and the levels of serum pro-inflammatory cytokines,corroborated by in vivo intervention strategies in the musculature of both pig and mouse ***,the effects of Bacteroidetes on inflammation and muscle mass loss may involve the signaling pathway of the tauro-β-muricholic acid-fibroblast growth factor ***,the induction of overexpression of inflammatory cytokines,achieved without LPS treatment through oral administration of recombinant human IL-6(rh IL-6),led to increased levels of circulating cytokines,subsequently causing a decrease in muscle ***,pre-treatment with Mdivi-1,an inhibitor of Drp-1,markedly attenuated the LPS-induced elevation in reactive oxygen species levels and rescued the associated decline in muscle ***,these data indicate that LPS-induced muscle mass loss was linked to the reduction of Bacteroidetes abundance,increased inflammation,and the disruption of mitochondrial *** insights offer promising avenues for the identification of potential therapeutic targets aimed at mitigating muscle mass loss.

关键词： Bacteroidetes inflammation mitochondrial morphology muscle mass loss piglets

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Variations in source-specific soil organic matter components across 32 forest sites in China

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Carbon Research 2024年第1期3卷 1-16页

作者： Sun, Guodong Wang, Mengke Zhang, Qiang Wang, Yinghui Yang, Yuanxi Xu, Shan Wang, Junjian State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China School of Marine Sciences Sun Yat-Sen University Zhuhai519082 China Zhuhai519082 China

Forest soils store substantial amounts of carbon in various soil organic matter (SOM) components due to high plant litter inputs and active microbial turnover. However, the variations in plant- and microbial-derived SOM components in surface and subsurface forest soils across a wide geographic scale remain poorly understood. This study investigated the SOM components from aboveground and belowground plant inputs and fungal and bacterial necromass in surface (soil0–5 cm) and subsurface (soil5–10 cm) soils across 32 forest sites in China and analyzed their relationships with climate and edaphic factors. Compared to soil0–5 cm, soil5–10 cm exhibited lower soil organic carbon content and cutin biomarker concentration but higher concentrations of fungal necromass carbon and lignin phenols. Higher mean annual precipitation led to higher concentrations of cutin and suberin biomarkers in soil0–5 cm and soil5–10 cm, respectively. Higher soil organic carbon content was associated with lower plant-derived lignin biomarkers, higher lignin oxidation degrees, and increased microbial necromass-derived amino sugars across sites, highlighting the pivotal role of microbial necromass in SOM stabilization. Additionally, both fungal and bacterial necromass decreased with increasing mineral weathering across sites. These insights improve the understanding of environmental drivers of source-specific carbon storage in forest soils. Graphical Abstract: (Figure presented.) © The Author(s) 2024.

关键词： Amino sugars

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Occurrence and Decay of SARS-CoV-2 in Community Sewage Drainage Systems

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Engineering 2023年第7期26卷 214-219,I0008,I0009页

作者： Qian Dong 蔡俊雄刘艳臣凌海波 Qi Wang Luo-Jing Xiang Shao-Lin Yang Zheng-Sheng Lu Yi Liu Xia Huang 曲久辉 State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Hubei Provincial Academy of Eco-Environmental Sciences Wuhan 430072China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

The rapid spread of the coronavirus disease(COVID-19)pandemic in over 200 countries poses a substantial threat to human *** acute respiratory syndrome coronavirus 2(SARS-CoV-2),which causes COVID-19,can be discharged with feces into the drainage ***,a comprehensive understanding of the occurrence,presence,and potential transmission of SARS-CoV-2 in sewers,especially in community sewers,is still *** study investigated the virus occurrence by viral nucleic acid testing in vent stacks,septic tanks,and the main sewer outlets of community where confirmed patients had lived during the early days of the epidemic in Wuhan,*** results indicated that the risk of long-term emission of SARS-CoV-2 to the environment via vent stacks of buildings was low after confirmed patients were ***-CoV-2 were mainly detected in the liquid phase,as opposed to being detected in aerosols,and its RNA in the sewage of septic tanks could be detected for only four days after confirmed patients were *** surveillance of SARS-CoV-2 in sewage could be a sensitive indicator for the possible presence of asymptomatic patients in the community,though the viral concentration could be diluted more than ten times,depending on the sampling site,as indicated by the Escherichia coli *** comprehensive investigation of the community sewage drainage system is helpful to understand the occurrence characteristics of SARS-CoV-2 in sewage after excretion with feces and the feasibility of sewage surveillance for COVID-19 pandemic monitoring.

关键词： SARS-CoV-2 Transmission risk Drainage system Sewage Community

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Soil Carbon Sequestration in Ponds of Gordon Euryale Seed in the Pear River Delta 8th

Soil Carbon Sequestration in Ponds of Gordon Euryale Seed in...

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8th Asia Conference on Environment and Sustainable Development, ACESD 2023

作者： Xiao, Liang Huang, Qiaoxin Chen, Sijie Yuan, Guodong Guangdong Provincial Key Laboratory of Environmental Health and Land Resource Guangdong Technology and Equipment Research Center for Soil and Water Pollution Control Zhaoqing University Zhaoqing526061 China

ISBN: (纸本)9789819733194

Soil is the largest carbon pool in terrestrial ecosystems, and maintaining or increasing soil organic carbon (SOC) storage helps mitigate climate change. This study investigated the potential of SOC storage in agricultural ponds, a common land use type in the Pear River Delta. Ponds for producing Gordon Euryale Seed for medical and healthcare purposes were selected to assess the impact of planting years on SOC storage. Soil samples were taken from ponds with 0, 24, and 60 years of production history for separating soil aggregates of various sizes by wet sieving, assessing their stabilities, and determining their carbon and nitrogen contents. Compared with the control (a pond without Gordon Euryale Seed), soil aggregates of > 0.25 mm decreased by 36.94 and 52.63% after 24 and 60 years of planting Gordon Euryale Seed, respectively. Conversely, soil aggregates > 0.25 mm increased by 58.54% and 67.89%. Meanwhile, mean-weight diameter (MWD) and geometric mean diameter (GMD) of soil aggregates > 0.25 mm (R0.25) increased, and fractal dimension (D) decreased, suggesting soil aggregates became larger and more stable as planting years grew. As a result, SOC storage increased with planting years, as did the relative contribution of larger soil aggregates (>0.25 mm) to SOC. The outcomes of this work suggest that planting Gordon Euryale Seed is a land use with good economic return and carbon sequestration benefit. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Lakes

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Performances,mechanisms,and strategies for methane removal via gas biofiltration

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Frontiers of Environmental Science & Engineering 2025年第5期19卷 141-162页

作者： Xin Wu Chunping Yang Yan Lin Xiang Li Shaohua Wu Piotr Rybarczyk Jacek Gebicki Academy of Environmental and Resource Sciences School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China College of Urban and Environment Sciences Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste ResourcesHunan University of TechnologyZhuzhou 412007China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)of Ministry of EducationChangsha 410082China School of Environmental Science and Engineering Hainan UniversityHaikou 570228China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China Department of Process Engineering and Chemical Technology Faculty of ChemistryGdansk University of TechnologyGdansk 80-233Poland

control of methane emissions has attracted widespread attention in the context of worldwide efforts to alleviate the greenhouse ***,a green and cost-effective treatment process,has been widely used for the purification of ***,there is still a lack of comprehensive information on methane ***,the state-of-the-art development trends of methane removal via biofiltration were comprehensively reviewed and commented *** of all,this article reviewed the mechanisms of methane removal and the possible degradation pathways in ***,the removal characteristics of single methane,methane mixed with volatile organic compounds or gaseous inorganic compounds by biofiltration,were summarized and ***,the practical applications of methane biofiltration were summed up and some inspirations were ***,the effective measures to improve the performance of methane biofiltration were put forward,and corresponding insights and future research directions for methane biofiltration were *** article can provide references for the practical applications of methane biofiltration and the mitigation of greenhouse effects.

关键词： Biofilter Methane VOC Greenhouse effect Carbon reduction

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Three-dimensional heterogeneous electro-Fenton system with reduced graphene oxide based particle electrode for Acyclovir removal

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Chinese Chemical Letters 2024年第1期35卷 424-430页

作者： Nan Cai Ge Bai Ting Zhang Yongqian Lei Pengran Guo Zhiliang Chen Jingwei Xu Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology Guangdong Provincial Engineering Research Center for Online Monitoring of Water PollutionInstitute of AnalysisGuangdong Academy of Sciences(China National Analytical CenterGuangzhou)Guangzhou 510070China College of Petrochemical Engineering Lanzhou University of TechnologyLanzhou 730000China Guangdong Engineering Technology Research Center of Heavy Metal Pollution Control and Restoration in Farmland Soil South China Institute of Environmental SciencesMEEGuangzhou 510535China

New pollutant pharmaceutical and personal care products(PPCPs),especially antiviral drugs,have received increasing attention not only due to their increase in usage after the outbreak of COVID-19 epidemics but also due to their adverse impacts on water ecological ***-Fenton technology is an effective method to remove PPCPs from *** particle electrodes(MMT/rGO/Fe_(3)O_(4))were synthesized by depositing Fe3O4 nanoparticles on reduced graphene oxide modified montmorillonite and acted as catalysts to promote oxidation performance in a three-dimensional electro-Fenton(3D-EF)*** electrodes combined the catalytic property of Fe3O4,hydrophilicity of montmorillonite and electrical conductivity of graphene oxides,and applied for the degradation of Acyclovir(ACV)with high efficiency and ease of *** optimal condition,the degradation rate of ACV reached 100%within 120 min,and the applicable pH range could be 3 to 11 in the 3D-EF *** stability and reusability of MMT/rGO/Fe_(3)O_(4)particle electrodes were also studied,the removal rate of ACV remained at 92%after 10 cycles,which was just slightly lower than that of the first *** degradation mechanisms were also proposed by methanol quenching tests and FT-ICR-MS.

关键词： Advanced oxidation Three-dimensional electro-Fenton Reduced graphene oxide Acyclovir(ACV) Degradation

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Interactions between H_(2)O_(2)and dissolved organic matter during granular activated carbon-based residual H_(2)O_(2)quenching from the upstream UV/H_(2)O_(2)process

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Journal of Environmental Sciences 2023年第6期128卷 139-149页

作者： Yaoyao Kang Junfeng Lian Yichun Zhu Zuwen Liu Wentao Li Huiyu Dong Yuanyue Wang Jinfeng Zeng Zhimin Qiang Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China CECEP Environmental Protection Investment Development(Jiangxi)Co.Ltd. Nanchang 330006China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Ganzhou 341000China

Granular activated carbon(GAC)filtration can be employed to synchronously quench residual H_(2)O_(2)from the upstream UV/H_(2)O_(2)process and further degrade dissolved organicmatter(DOM).In this study,rapid small-scale column tests(RSSCTs)were performed to clarify the mechanisms underlying the interactions between H_(2)O_(2)and DOM during the GAC-based H_(2)O_(2)quenching *** was observed that GAC can catalytically decompose H_(2)O_(2),with a long-lasting high efficiency(>80%for approximately 50,000 empty-bed volumes).DOM inhibited GAC-based H_(2)O_(2)quenching via a pore-blocking effect,especially at high concentrations(10 mg/L),with the adsorbed DOM molecules being oxidized by the continuously generated·OH;this further deteriorated the H_(2)O_(2)quenching *** batch experiments,H_(2)O_(2)could enhance DOM adsorption by GAC;however,in RSSCTs,it deteriorated DOM *** observation could be attributed to the different·OH exposure in these two *** was also observed that aging with H_(2)O_(2)and DOM altered the morphology,specific surface area,pore volume,and the surface functional groups of GAC,owing to the oxidation effect of H_(2)O_(2)and·OH on the GAC surface as well as the effect of ***-tionally,the changes in the content of persistent free radicals in the GAC samples were insignificant following different aging *** work contributes to enhancing understanding regarding the UV/H_(2)O_(2)-GAC filtration scheme,and promoting the application in drinking water treatment.

关键词： Granular activated carbon H_(2)O_(2)quenching Dissolved organic matter Rapid small-scale column tests Persistent free radicals

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