Article
Microbiology
Jian Liu, Kaiquan Liu, Zhe Zhao, Zheng Wang, Fengchao Wang, Yuxiu Xin, Jie Qu, Feng Song, Zhenghua Li
Summary: In this study, the LuxS/AI-2 signaling pathway was identified as the primary quorum-sensing system for controlling algicidal activity in Shewanella xiamenensis Lzh-2. Disruption of the LuxS gene resulted in a loss of algicidal activity, while restoration of the LuxS gene recovered the activity.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Asad Aziz, Hasan Rameez, Ashish Sengar, Diwakar Sharma, Izharul Haq Farooqi, Farrukh Basheer
Summary: The research demonstrated that sequential anaerobic and aerobic granular intermittent sequencing batch reactors effectively treated slaughterhouse wastewater at different HRTs, aiding in pollutant removal and biogas production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Engineering, Environmental
Xueping Wang, Deshuang Yu, Guanghui Chen, Chengju Liu, Ao Xu, Zhihao Tang
Summary: This paper discusses the bacterial communication mechanism based on QS and the environmental factors affecting QS, compares QS inhibition strategies, and explores the role and prospects of QQ in long-term operation systems.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Xiao Wei, Tanghui Long, Yanjiao Li, Kehui Ouyang, Qinghua Qiu
Summary: This study found that a diet shift can trigger rumen bacterial LuxS/AI-2 quorum sensing by altering microbial density, AI-2 concentration, biofilm formation, and related gene expression. This, in turn, affects rumen fermentation characteristics and bacterial community diversity and composition.
BIOENGINEERING-BASEL
(2022)
Article
Multidisciplinary Sciences
Fei Shang, Hui Wang, Dan Zhang, Wenhui Wang, Jiangliu Yu, Ting Xue
Summary: In this study, the autoinducer-2 quorum sensing system was incorporated into the pET expression system, resulting in the construction of the autoinduction expression vector pXWZ1. The expression efficiency of the reporter genes was higher in cells transformed with pXWZ1 compared to traditional pET28a(+) vectors, suggesting that this new system will provide a more economical and convenient tool for recombinant protein expression.
Article
Microbiology
Shenmiao Li, Kelvin Ka-wan Chan, Marti Z. Hua, Greta Goelz, Xiaonan Lu
Summary: Decanoic acid and lauric acid were found to inhibit AI-2 activity of C. jejuni and reduce biofilm biomass and motility. These findings can aid in developing alternative C. jejuni control strategies.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Valquiria Campos Alencar, Juliana de Fatima dos Santos Silva, Renata Ozelami Vilas Boas, Vinicius Manganaro Farnezio, Yara N. L. F. de Maria, David Aciole Barbosa, Alex Tramontin Almeida, Emanuel Maltempi de Souza, Marcelo Muller-Santos, Daniela L. Jabes, Fabiano B. Menegidio, Regina Costa de Oliveira, Tiago Rodrigues, Ivarne Luis dos Santos Tersariol, Adrian R. Walmsley, Luiz R. Nunes
Summary: AI-2 can induce QS responses in bacteria, and Z. mobilis responds to AI-2 by modulating gene expression related to QS, promoting ethanol production and adapting to the high energy demand of N-2 fixation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
Keun-Woo Lee, Haneul Jie, Soyee Kim, Min-Gyung Baek, Hana Yi, Kun-Soo Kim
Summary: Autoinducer-2 (AI-2), a quorum-sensing signal molecule from Vibrio vulnificus, plays an important role in the colonization of the small intestine. The absence of luxS gene not only affects the ability of V. vulnificus to colonize the host gut but also its susceptibility to the growth-inhibiting activity of commensal bacteria including Lactobacillus.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Microbiology
Julie S. Valastyan, Christina M. Kraml, Istvan Pelczer, Thomas Ferrante, Bonnie L. Bassler
Summary: Quorum sensing is a communication process used by bacteria to coordinate collective behaviors through the production, release, and detection of autoinducers. A new study shows that mammalian cells and yeast Saccharomyces cerevisiae can produce an AI-2 mimic called MHF, which can facilitate interdomain signaling through the protein Cff1p. This discovery expands the scope of organisms and molecules involved in quorum sensing interactions.
Article
Food Science & Technology
Susana Fernandes, Anabela Borges, Ines B. Gomes, Sergio F. Sousa, Manuel Simoes
Summary: This study identified curcumin and 10-undecenoic acid as effective quorum sensing inhibitors through in silico analysis and in vitro validation, providing alternatives to counteract bacterial pathogenicity and biofilm formation.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Environmental
Fabio Campos, Natalia Rodrigues Guimaraes, Fernanda Cunha Maia, Marcel Zanetti Sandoval, Joao Paulo Bassin, Rodrigo de Freitas Bueno, Roque Passos Piveli
Summary: Aerobic granular sludge (AGS) is considered a breakthrough in wastewater treatment due to its excellent settleability, simultaneous removal of organic and nutrient pollutants, and compactness. This study focused on the start-up of a pilot-scale AGS reactor treating domestic sewage, which achieved robust and stable granules after an initial period of around six months. The reactor showed high nitrogen removal efficiency and satisfactory removal of soluble COD but was affected by sudden changes in influent quality.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Chemistry, Medicinal
Yijie Xu, Chunlan Zeng, Huiqi Wen, Qianqian Shi, Xu Zhao, Qingbin Meng, Xingzhou Li, Junhai Xiao
Summary: Several AI-2 QSIs targeting the LsrK/HPr PPI site have been discovered, providing potential for finding more effective AI-2 QSIs.
Article
Veterinary Sciences
Hui Wang, Fei Shang, Jiawei Shen, Jingyi Xu, Xiaolin Chen, Jingtian Ni, Lumin Yu, Ting Xue
Summary: This study revealed the crucial role of LsrR in the oxidative stress response of MPEC, showing that mutation of lsrR significantly impacted the survival ability of the pathogenic Escherichia coli, further confirming that LsrR affects oxidative stress response by regulating the expression of specific genes in bacteria.
VETERINARY RESEARCH
(2021)
Article
Agricultural Engineering
Jie Kang, Ziliang Yin, Fangyi Pei, Zeming Ye, Gang Song, Hongzhi Ling, Dongni Gao, Xueyong Jiang, Chi Zhang, Jingping Ge
Summary: The presence of antibiotics in chicken manure can disrupt the collaboration between bacterial communities and their ability to regulate humification. Penicillin G mainly affects low-abundance microbial genera, but different bacterial communities may have similar ecological functions. Quorum sensing influences humic acid synthesis by regulating carbohydrate and amino acid metabolism in bacterial communities.
BIORESOURCE TECHNOLOGY
(2022)
Article
Microbiology
Xiaozhen Liu, Qinmeng Liu, Sihuai Sun, Hengxi Sun, Yao Wang, Xihui Shen, Lei Zhang
Summary: This study identified genes related to quorum sensing (QS) in rumen microbial genomes and found that these genes were prevalent and highly expressed in the rumen, suggesting a universal cell-to-cell communication and social behavior mediated by QS in rumen microbes.
Article
Agricultural Engineering
Meng Zhang, Bin Ji, Shulian Wang, Jun Gu, Yu Liu
Summary: This study found a strong correlation between extracellular polymeric substances of microalgal-bacterial granules and the granule size. The granule size had a positive effect on the removal of specific organics in wastewater, but a negative effect on ammonium and phosphorus removal. Granule size can be used as an indicator to reflect the synergistic interactions between microalgae and bacteria in microalgal-bacterial granules.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Siyu Wang, Hang Liu, Jun Gu, Meng Zhang, Yu Liu
Summary: An integrated AnfMBR-RO-chlorination process was developed to address the drawbacks of excessive sludge generation and high energy consumption in municipal wastewater reclamation. The process showed high removal rates of COD, phosphate, and NH4+-N, and significantly reduced energy consumption and greenhouse gas emissions compared to current methods, bringing municipal wastewater reclamation closer to carbon neutrality and water sustainability.
Article
Environmental Sciences
Zhen Gao, Yingqun Ma, Yu Liu, Qunhui Wang
Summary: This study developed a co-fermentation strategy using waste cooking oil (WCO) and food waste for microbial lipid production. It was found that adjusting the pH values within a certain range could increase lipid production efficiency. The produced lipid could potentially be used for biodiesel production, leading to significant reductions in CO2 and SO2 emissions from global food waste.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Jun Zhang, Yi-ping Wan, Ze-hua Liu, Hao Wang, Zhi Dang, Yu Liu
Summary: The stability of C-NEs in aqueous environmental samples is influenced by different storage conditions, with low temperature of 4 degrees C leading to easy deconjugation, while pH of 3 and addition of HgCl2 can keep C-NEs intact at room temperature. Addition of HgCl2 is more convenient and practical for 24-h composite sampling.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jun Zhang, Shu-shu Zhong, Ke-meng Zhao, Ze-hua Liu, Zhi Dang, Yu Liu
Summary: Sulfite can effectively inhibit arylsulfatase, potentially disrupting estrogen homeostasis in humans, which requires further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Zhao Tang, Yi-Ping Wan, Ze-Hua Liu, Hao Wang, Zhi Dang, Yu Liu
Summary: This study reveals the presence of eight less-studied natural estrogens in the urine of swine and cattle, showing that these estrogens are widely distributed and vary in frequency among different livestock.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Meng Zhang, Jun Gu, Siyu Wang, Yu Liu
Summary: Novel sandwich-structured carriers were developed for fast immobilization of anammox sludge, establishing a fixed film membrane bioreactor for municipal wastewater treatment. Results showed rapid start-up of the reactor without lag phase, with high nitrogen removal efficiency and low membrane fouling. The activity of anammox sludge stabilized in the carriers, enriching Candidatus Kuenenia as the dominant anammox bacteria for promising alternative in mainstream anammox process.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Zhao Tang, Ze-hua Liu, Wu Chen, Chen Wang, Ya-jiang Wu, Hao Wang, Zhi Dang, Yu Liu
Summary: This study reports the presence of twelve natural estrogens (NEs) in the urine of endangered mammals in a Zoo Park in Guangzhou, with different species showing varying concentrations of NEs. The findings indicate that zoo animals' urine can be an emerging source of NEs and should be considered for further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Xiaoyuan Zhang, Jun Gu, Yu Liu
Summary: With the growing challenges of global climate change and water shortage, an innovative wastewater reclamation technology has been developed to achieve energy and carbon neutrality. The technology combines anaerobic membrane bioreactor (AnMBR) and biochar adsorption-reverse osmosis (RO) processes, resulting in efficient municipal wastewater reclamation with reduced energy consumption and carbon emissions.
Review
Agricultural Engineering
Xiaoyuan Zhang, Yu Liu
Summary: This article discusses the challenges faced by the conventional activated sludge process in the face of accelerating global climate change and explores potential wastewater treatment technologies and pathways towards achieving carbon neutrality.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Yuting Shi, Bin Ji, Xiaoyuan Zhang, Yu Liu
Summary: The microalgal-bacterial granular sludge (MBGS) process, as a new green wastewater treatment technology, was evaluated for its performance in treating municipal wastewater under outdoor conditions. The study discovered the auto-floating phenomenon and its causes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yi-Kun Geng, Jun Gu, Xiaoyuan Zhang, Zhuan Khai Lim, Yishuai Jiang, Meng Zhang, Yan Zhou, Yu Liu
Summary: This study developed an innovative A-B process for carbon-neutral wastewater treatment by combining an anaerobic biofilm reactor (AnBR) as the A stage for energy recovery and a step-feed membrane bioreactor (MBR) as the B stage for mainstream deammonification. A multi-parameter control-based operation strategy was developed to address the challenge of selectively retaining ammonia-oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB). Results showed that this process configuration achieved high removal rates of COD, ammonium-N, and total nitrogen, while promoting the growth and enrichment of anammox bacteria.
Article
Environmental Sciences
Xiaoyuan Zhang, Bin Ji, Junli Tian, Yu Liu
Summary: This study reported the development, performance, and microbial community of microalgal-bacterial biofilms for municipal wastewater treatment in a continuous-flow photoreactor. The results showed that microalgal-bacterial biofilms were successfully developed without external aeration. The biofilm concentrations reached steady-state at 4690 mg/L with a hydraulic retention time (HRT) of 9 h. Increasing HRT to 12 h did not enhance the biofilm accumulation but resulted in faster growth of microalgae, while the chlorophyll-a&b content in biofilms stabilized after the initial stage. Performance analysis revealed that microalgal-bacterial biofilms removed 90% of TOC, 71.4% of total nitrogen, and 72.6% of phosphorus in the steady-state photoreactor run at an HRT of 12 h with external aeration. Cyanobacteria and Chloroflexi were the dominant components, while Chlorophyta dominated the eukaryotic algal community in biofilms. This study provides insights into the development of microalgal-bacterial biofilms for sustainable low-carbon municipal wastewater treatment in continuous-flow photoreactors.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Agricultural Engineering
Xiaoyuan Zhang, Lei An, Junli Tian, Bin Ji, Jinfeng Lu, Yu Liu
Summary: This article provides a preliminary analysis on the carbon capture potential of microalgal cultivation, indicating that the energy consumption and nutrient input can result in significant indirect carbon emissions, making microalgal carbon capture less effective. The current processes may not be environmentally sustainable and economically viable, thus renewable energy and cheap nutrient sources should be explored to reduce indirect carbon emissions and promote complete nutrient recycling through using microalgae as biofertilizers or aquafeeds.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiaoyuan Zhang, Yu Liu
Summary: In this study, a novel nanostructured layered sodium vanadosilicate adsorbent was synthesized for the concurrent removal of Cu2+, Ni2+, and Co2+ from wastewater in a ternary system. The adsorption equilibrium was reached within 30 minutes, indicating fast adsorption kinetics, with Cu2+ showing the highest affinity among the three ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)