4.7 Article

Mitigating mechanism of nZVI-C on the inhibition of anammox consortia under long-term tetracycline hydrochloride stress: Extracellular polymeric substance properties and microbial community evolution

Related references

Note: Only part of the references are listed.
Article Engineering, Environmental

C-N-S synergy in a pilot-scale mainstream anammox fluidized-bed membrane bioreactor for treating chemically enhanced primary treatment saline sewage

Xiaowu Huang et al.

Summary: Using seawater for toilet flushing can save scarce freshwater resources in densely-populated coastal cities like Hong Kong. Saline sewage treatment using energy-efficient anammox-based processes shows great potential, but its feasibility is still uncertain. This study successfully operated a pilot-scale anammox process in a granular activated carbon fluidized-bed membrane bioreactor (FMBR) with only inoculating saline anaerobic digestion sludge, achieving comparable nitrogen removal rates while treating real chemically enhanced primary treatment saline sewage.

WATER RESEARCH (2023)

Article Engineering, Environmental

Unraveling the evolution of dissolved organic matter in full-scale A/A/O wastewater treatment process using size exclusion chromatography with PARAFAC and nonnegative matrix factorization analysis

Min-Hui Cai et al.

Summary: This study characterized the changes in spectral features and molecular weight of dissolved organic matter (DOM) in wastewater treatment plants (WWTPs) using size exclusion chromatography with a diode array detector, a fluorescence detector, and an organic carbon detector. The analysis showed that certain components within the DOM had a wide range of molecular weights, indicating their coherence across samples. The study also revealed that the degradation of proteinaceous and polysaccharide-like biopolymers contributed to the decreases in dissolved organic carbon and fluorescence intensity during the anaerobic process. Additionally, the formation of humic acid-like fluorophores was associated with carbohydrate metabolism.

WATER RESEARCH (2023)

Article Environmental Sciences

Pollution characteristics of typical ARGs in the sediments of the sea area adjacent to the Yangtze Estuary, China

Zhiqiang Zhang et al.

Summary: The pollution characteristics of typical antibiotic resistance genes (ARGs) in the sediments of the sea area adjacent to the Yangtze Estuary in China were investigated. The results showed that the sediments were extensively polluted with ARGs, with sul1 being the dominant resistance gene. The abundances of ARGs were higher in flood season compared to dry season, and the southern sites had higher abundances than the northern sites, predominantly located near the coast. These findings provide valuable information for environmental protection in the area and the Yangtze River Basin.

ENVIRONMENTAL POLLUTION (2023)

Article Environmental Sciences

Humic acid enhanced pyrene degradation by Mycobacterium sp. NJS-1

Xiaoning Li et al.

Summary: The study found that the addition of humic acid (HA) can significantly enhance the biodegradation efficiency of Mycobacterium sp. NJS-1 on pyrene and induce a new degradation pathway. Furthermore, HA also alters the ultrastructure of bacterial cells, promoting their growth and reducing the space between cells, thereby further improving the biodegradation of pyrene.

CHEMOSPHERE (2022)

Article Environmental Sciences

Coupling direct voltage and granular activated carbon modified nanoscale zero valent iron for enhancing anaerobic methane production

Muchen Sun et al.

Summary: Adding GAC-NZVI particles into anaerobic system with 0.10 V direct voltage was found to enhance CH4 production process. The measurements showed that the particles promoted the secretion of EPS by microorganisms, which improved the floc strength of granular sludge and accelerated the metabolism of microorganisms. The results indicated that anaerobic treatment efficiency could be enhanced under the combined action of direct voltage and particles.

CHEMOSPHERE (2022)

Article Engineering, Environmental

Efficient bio-refractory industrial wastewater treatment with mitigated membrane fouling in a membrane bioreactor strengthened by the micro-scale ZVI@GAC galvanic-cells-initiated radical generation and coagulation processes

Shihai Deng et al.

Summary: Micro-scale ZVI@GAC-based iron-carbon galvanic cells were successfully developed and applied to treat bio-refractory industrial wastewater. The results showed that the addition of ZVI@GACs improved organic degradation and phenolic compound destruction in the MBR system. Furthermore, ZVI@GACs reduced bio-toxicity, prolonged membrane fouling cycle, and reduced sludge accumulation.

WATER RESEARCH (2022)

Article Environmental Sciences

Robustness of the partial nitrification-anammox system exposing to triclosan wastewater: Stress relieved by extracellular polymeric substances and resistance genes

Yifan Zhao et al.

Summary: The PN/A process showed resilience to 0.5 mg/L of TCS, even enhancing total nitrogen removal efficiency. The presence of influent TCS led to an increase in extracellular polymeric substances and enrichment of specific resistance genes in the PN/A system, contributing to its ability to resist the antimicrobial agent. Functional bacteria carrying multiple resistance genes were also identified as crucial for maintaining the PN/A system function in the presence of TCS.

ENVIRONMENTAL RESEARCH (2022)

Article Environmental Sciences

Electron transfer capacity of humic acid in soil micro and macro aggregates in response to mulching years

Yifan Zhang et al.

Summary: Plastic film mulching has long-term effects on the electron transfer capacity of natural organic matter in the soil, particularly in microaggregates. Film mulching alters the physical and chemical properties of the soil and enzyme activity, affecting the chemical structure of humic acid.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Biochemistry & Molecular Biology

A general protocol for the expression and purification of the intact transmembrane transporter FeoB

Alex E. Sestok et al.

Summary: In this study, an overproduction and purification system was developed to isolate sufficient quantities of FeoB protein from various organisms. The effectiveness of protein extraction from the lipid bilayer was demonstrated through small-scale solubilization studies. This approach was then successfully applied to the large-scale purifications of Escherichia coli and Pseudomonas aeruginosa FeoBs to achieve high purity and homogeneity.

BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES (2022)

Article Agricultural Engineering

Enhancing methane production of co-digested food waste with granular activated carbon coated with nano zero-valent iron in an anaerobic digester

Zahra Al Hasani et al.

Summary: The study found that the use of conductive additive GAC/nZVI in anaerobic digestion process can significantly increase the biogas production and methane generation, as well as improve the removal rate of COD.

BIORESOURCE TECHNOLOGY (2022)

Article Agricultural Engineering

Fe(II) improving sulfurized Anammox coupled with autotrophic denitrification performance: Based on interspecies and intracellular electron transfer

Wenmin Lin et al.

Summary: This study investigates the mechanism of electron transfer in AnAOB and SOB system, and demonstrates that adding Fe(II) can improve the total nitrogen removal efficiency in wastewater.

BIORESOURCE TECHNOLOGY (2022)

Article Engineering, Environmental

Multi-Omics Analysis Reveals the Nitrogen Removal Mechanism Induced by Electron Flow during the Start-up of the Anammox- Centered Process

Li Zhang et al.

Summary: This study used metagenomics-metatranscriptomics analyses to investigate the nitrogen removal mechanism in anammox-centered coupling systems. The results demonstrated that the nitrogen transformation was driven by the electron generation-transport-consumption process. The findings provide important insights for the application of anammox-centered systems in treating nitrogen wastewater.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Engineering, Environmental

Metagenomic insights into the symbiotic relationship in anammox consortia at reduced temperature

Tao Ya et al.

Summary: This study found that reducing the temperature promoted the production of larger granular sludge in a laboratory-scale anammox reactor. The researchers also discovered potential interactions between AnAOB and heterotrophic bacteria through network analysis and metagenomics. These interactions help maintain the stability of the anammox reactor.

WATER RESEARCH (2022)

Article Agricultural Engineering

Metabolic fates and response strategies of microorganisms to aromatic compounds with different structures

Xingshe Liu et al.

Summary: This study comparatively investigated the metabolic fates and response strategies of microorganisms to aromatic compounds with different structures. The results showed that the degradation characteristics and toxic effects were closely related to the chemical structure of the compounds. Microorganisms exhibited different response strategies for compounds with simple and complex structures.

BIORESOURCE TECHNOLOGY (2022)

Article Agricultural Engineering

Layered inoculation of anaerobic digestion and anammox granular sludges for fast start-up of an anammox reactor

Yanxu Liu et al.

Summary: Layered inoculation of anaerobic digestion and anammox granular sludges can lead to rapid start-up of anammox, with increased nitrogen loading rate and nitrogen removal rate. The study found that AD granular sludge exhibited anammox activity and could be cultured into anammox granular sludge for accelerated reactor start-up. Adsorption, interception, and domestication enhanced the biomass of anammox bacteria, addressing slow start-up issues in industrial applications.

BIORESOURCE TECHNOLOGY (2021)

Article Agricultural Engineering

Application of electric fields to mitigate inhibition on anammox consortia under long-term tetracycline stress

Benai Cheng et al.

Summary: The study found that applying electric fields can enhance the tolerance of tetracycline, improve nitrogen removal performance, and help mitigate irreversible inhibition, thus enhancing the stability of community structure.

BIORESOURCE TECHNOLOGY (2021)

Article Engineering, Environmental

Accumulation of antibiotic resistance genes in full-scale drinking water biological activated carbon (BAC) filters during backwash cycles

Kun Wan et al.

Summary: This study investigates the presence of ARGs and bacterial community in full-scale BAC filters during backwash cycle. It was found that after backwashing, the abundance of ARGs increased in biofilm samples, with many ARGs persisting in the filters. The accumulation of ARGs in filters is mainly driven by horizontal gene transfer, calling for more stringent disinfection strategies and further research to assess potential human health risks.

WATER RESEARCH (2021)

Article Engineering, Environmental

Antibiotic resistance genes attenuation in anaerobic microorganisms during iron uptake from zero valent iron: An iron-dependent form of homeostasis and roles as regulators

Yi Xu et al.

Summary: Zero valent iron (ZVI) has been shown to reduce antibiotic resistance genes (ARGs) in microbes by inhibiting horizontal transfer of ARGs and decreasing proliferation of resistant strains. However, a higher dosage of 20 g/L ZVI had negligible effects on ARGs reduction, possibly due to iron-catalyzed oxidative damage and reduced physiological activity.

WATER RESEARCH (2021)

Article Agricultural Engineering

Simultaneous nitrogen and phosphorus removal from simulated digested piggery wastewater in a single-stage biofilm process coupling anammox and intracellular carbon metabolism

Wei Huang et al.

Summary: The SAIC system showed enhanced TN and TP removal efficiencies compared to the reference, with denitrification driven by intracellular carbon contributing significantly to TN elimination and phosphorus mainly removed through biological routes. The synergy of multiple metabolic pathways, including anammox, (partial) nitrification, endogenous (partial) denitrification, and biological P-removal, was observed in the SAIC system, supported by the commensalism of various microbial groups.

BIORESOURCE TECHNOLOGY (2021)

Article Engineering, Environmental

Nano zero-valent iron improves anammox activity by promoting the activity of quorum sensing system

Zhibin Wang et al.

Summary: The addition of 50 mg/L nZVI in the anammox reactor was found to promote the removal of NH4+ and NO2-, increase the relative abundance of AnAOB, and enrich c-di-GMP in the microbial community. This enrichment of c-di-GMP reduced microbial motility and promoted the secretion of extracellular polymers, ultimately aiding the formation of sludge particles in the reactor.

WATER RESEARCH (2021)

Article Environmental Sciences

Exogenous extracellular polymeric substances as protective agents for the preservation of anammox granules

Quan Zhang et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2020)

Article Environmental Sciences

Overcoming challenges in mainstream Anammox applications: Utilization of nanoscale zero valent iron (nZVI)

Esra Erdim et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

Review Environmental Sciences

Role and application of iron in water treatment for nitrogen removal: A review

Hongbo Liu et al.

CHEMOSPHERE (2018)

Article Biochemical Research Methods

Intervolume analysis to achieve four-dimensional optical microangiography for observation of dynamic blood flow

Wei Wei et al.

JOURNAL OF BIOMEDICAL OPTICS (2016)

Article Biotechnology & Applied Microbiology

Characterization of the extracellular polymeric substances and microbial community of aerobic granulation sludge exposed to cefalexin

Qiang Kong et al.

INTERNATIONAL BIODETERIORATION & BIODEGRADATION (2015)

Article Infectious Diseases

Genetic analysis of Tn916-like elements conferring tetracycline resistance in clinical isolates of Clostridium difficile

Danfeng Dong et al.

INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS (2014)

Article Biotechnology & Applied Microbiology

Growth and metabolism characteristics of anaerobic ammonium-oxidizing bacteria aggregates

Ting-Ting Chen et al.

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY (2013)

Article Environmental Sciences

Effects on activated sludge bacterial community exposed to sulfamethoxazole

N. Collado et al.

CHEMOSPHERE (2013)

Article Environmental Sciences

Chromium removal using resin supported nanoscale zero-valent iron

Fenglian Fu et al.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2013)

Article Biochemistry & Molecular Biology

Operation of an Anammox SBR in the presence of two broad-spectrum antibiotics

I. Fernandez et al.

PROCESS BIOCHEMISTRY (2009)

Article Engineering, Environmental

Startup of reactors for anoxic ammonium oxidation: Experiences from the first full-scale anammox reactor in Rotterdam

Wouter R. L. van der Star et al.

WATER RESEARCH (2007)