Qian Xiong, Li-Xin Hu, You-Sheng Liu, Jian-Liang Zhao, Liang-Ying He, Guang-Guo Ying
Antibiotics contamination is an emerging environmental concern, owing to its potential risks to ecosystems and human health. Microalgae-based technology has been widely reported as a promising alternative to conventional wastewater treatment, since it is a solar-power driven, ecologically friendly, cost-effective, and sustainable reclamation strategy. This review provides fundamental insights into the major mechanisms underpinning microalgae-based antibiotics removal, including bioadsorption, bioaccumulation, and biodegradation...
April 30, 2021: Environment International
Atieh Ebrahimi, Muttucumaru Sivakumar, Craig McLauchlan
The past decade has seen the rapid development of constructed wetland-microbial fuel cell (CW-MFC) technology in many aspects. The first publication on the combination of constructed wetland (CW) and microbial fuel cell (MFC) appeared in 2012, subsequently, research on the subject has grown exponentially to improve the performance of CW-MFCs in their dual roles of wastewater treatment and power generation. Although significant research has been conducted on this technology worldwide, a comprehensive and critical review of effective controlling parameters is lacking...
April 30, 2021: Journal of Environmental Management
Jia Chen, Tingting Wang, Ke Zhang, Hongbing Luo, Wei Chen, You Mo, Zhaolan Wei
The removal characteristics of antibiotic resistance genes and mobile genetic elements from livestock wastewater (dominated by quinolone antibiotics) treated with MFC were evaluated by High-throughput quantitative (HT-qPCR). The results showed that 144 ARGs and 8 MEGs were detected in the livestock wastewater. After MFC treatment, the number of AGRs decreased as a whole, and the relative abundance of macrolide-lincosamide-streptogramin group B (MLSB) and aminoglycosider decreased by 62.7% and 92.9%, respectively...
April 28, 2021: Ecotoxicology and Environmental Safety
Mohammad Faisal Umar, Mohd Rafatullah, Syed Zaghum Abbas, Mohamad Nasir Mohamad Ibrahim, Norli Ismail
Anthropogenic activities are largely responsible for the vast amounts of pollutants such as polycyclic aromatic hydrocarbons, cyanides, phenols, metal derivatives, sulphides, and other chemicals in wastewater. The excess benzene, toluene and xylene (BTX) can cause severe toxicity to living organisms in wastewater. A novel approach to mitigate this problem is the benthic microbial fuel cell (BMFC) setup to produce renewable energy and bio-remediate wastewater aromatic hydrocarbons. Several mechanisms of electrogens have been utilized for the bioremediation of BTX through BMFCs...
April 6, 2021: International Journal of Environmental Research and Public Health
Eivydas Andriukonis, Raimonda Celiesiute-Germaniene, Simonas Ramanavicius, Roman Viter, Arunas Ramanavicius
This review focuses on the overview of microbial amperometric biosensors and microbial biofuel cells (MFC) and shows how very similar principles are applied for the design of both types of these bioelectronics-based devices. Most microorganism-based amperometric biosensors show poor specificity, but this drawback can be exploited in the design of microbial biofuel cells because this enables them to consume wider range of chemical fuels. The efficiency of the charge transfer is among the most challenging and critical issues during the development of any kind of biofuel cell...
April 1, 2021: Sensors
Ken Fujii, Naoko Yoshida, Kohei Miyazaki
Hydrodynamics has received considerable attention for application in improving microbial fuel cell (MFC) performance. In this study, a method is proposed to calculate the effect of fluid flow on MFC current production from sewage wastewater. First, the effect of flow velocity in an up-flow channel was evaluated, where an air-core MFC was polarized with external resistance (Rext ). When tested at a flow velocity ranging from 0 to 20 cm s-1 , the MFC with the higher flow velocity produced more current. In sewage wastewater with a chemical oxygen demand (COD) of 76 mg L-1 , the MFC polarized with 3 Ω of Rext , and a flow velocity of 20 cm s-1 had 5...
April 20, 2021: Bioelectrochemistry
Elias Broman, Karin Holmfeldt, Stefano Bonaglia, Per O J Hall, Francisco J A Nascimento
Up to 20% of prokaryotic organisms in the oceans are estimated to die every day due to viral infection and lysis. Viruses can therefore alter microbial diversity, community structure, and biogeochemical processes driven by these organisms. Cyanophages are viruses that infect and lyse cyanobacterial cells, adding bioavailable carbon and nutrients into the environment. Cyanobacteria are photosynthesizing bacteria, with some species capable of N2 fixation, which are known to form large blooms as well as resistant resting cells known as akinetes...
April 28, 2021: MSphere
Dong Huang, Ming-Jia Li, Rui-Long Wang, Yi-Wen Yang, Wen-Quan Tao
A new hybrid system is proposed to capture CO2 as well as generate electricity with the low CO2 inlet condition of confined space. Within the system, a novel photocatalytic porous framework coated by g-C3 N4 /TiO2 is prepared to avoid the inhibition of microalgae growth caused by the direct addition of photocatalyst. Under 0.8% v/v CO2 inlet condition, chemical oxygen demand (COD) yields from the photocatalytic framework immersed in the phosphate buffer and the algae suspension are 1.63 mg L-1  h-1 and 1...
April 18, 2021: Bioresource Technology
Sofia Milker, Dirk Holtmann
BACKGROUND: Terpenes are remarkably diverse natural structures, which can be formed via two different pathways leading to two common intermediates. Among those, sesquiterpenes represent a variety of industrially relevant products. One important industrially produced product is β-farnesene as a precursor for a jet fuel additive. So far, microbial terpene production has been mostly limited to known production hosts, which are only able to grow on heterotrophic substrates. RESULTS: In this paper, we for the first time describe β-farnesene production by the versatile bacterial host Cupriavidus necator on fructose, which is known to grow hetero- and autotrophically and even in bioelectrochemical systems...
April 26, 2021: Microbial Cell Factories
Karl August V Haxthausen, Xinyu Lu, Yifeng Zhang, Ulrich Gosewinkel, Dorthe Groth Petersen, Ugo Marzocchi, Andreas Libonati Brock, Stefan Trapp
Phosphate pollution in lakes poses an intractable remediation challenge. Accumulated stocks of phosphorus in sediments cause high concentrations in the overlying water despite elimination of external sources. We propose to use sediment microbial fuel cells (SMFCs) for lake remediation by sediment phosphorus immobilization. The hypothesis is that SMFCs can increase sediment redox potential at the top layer, and that such changes will allow the sediment to retain phosphorus as immobile species. This study placed an emphasis on scalability, practicality, and use of low-cost materials...
April 4, 2021: Water Research
Sweta Naik, Jujjavarapu Satya Eswari
Phenol is one of the most commonly known chemical compound found as a pollutant in the chemical industrial wastewater. This pollutant has potential threat for human health and environment, as it can be easily absorbed by the skin and the mucous. Here, we prepared dual chambered microbial fuel cell (MFC) sensor for the detection of phenol. Varying concentration of phenol (100 mg/l, 250 mg/l, 500 mg/l, and 1000 mg/l) was applied as a substrate to the MFC and their change in output voltage was also measured...
April 24, 2021: Journal of Environmental Management
Kan Zhang, Feifei Zhang, Yi-Rui Wu
Concerns regarding high energy demand and gradual depletion of fossil fuels have attracted the desire of seeking renewable and sustainable alternatives. Similar to but better than the first- and second-generation biomass, algae derived third-generation biorefinery aims to generate value-added products by microbial cell factories and has a great potential due to its abundant, carbohydrate-rich and lignin-lacking properties. However, it is crucial to establish an efficient process with higher competitiveness over the current petroleum industry to effectively utilize algal resources...
April 20, 2021: Science of the Total Environment
Cheng Tang, Yaqian Zhao, Chun Kang, Jintao He, Yan Yang, David Morgan
Oxygen is the electron acceptor in cathode chamber of microbial fuel cell-constructed wetland system (MFC-CW). The objective of the study lies in creating a "tidal flow" (TF) in cathode chamber via a siphon to enhance the oxygen diffusion, thus promoting the system performance. A laboratory scale MFC-CW with a siphon driven TF recirculation was proposed and designed. It allows the variable water level being created in four operational modes. The results demonstrated the significance of the siphon which was reflected by the attractive wastewater treatment performance...
April 23, 2021: Journal of Environmental Management
Edvige Gambino, Kuppam Chandrasekhar, Rosa Anna Nastro
Marine pollution is becoming more and more serious, especially in coastal areas. Because of the sequestration and consequent accumulation of pollutants in sediments (mainly organic compounds and heavy metals), marine environment restoration cannot exempt from effective remediation of sediments themselves. It has been well proven that, after entering into the seawater, these pollutants are biotransformed into their metabolites, which may be more toxic than their parent molecules. Based on their bioavailability and toxic nature, these compounds may accumulate into the living cells of marine organisms...
April 23, 2021: Environmental Science and Pollution Research International
You-Peng Qu, Jiang-Wei Lü, Yue Dong, Yu-Jie Feng, Jie Zhang
Large amounts of wastewater containing residual antibiotics are produced in antibiotics production, but it is difficult for traditional biological wastewater treatment to efficiently treat this high concentration antibiotic wastewater. Coupled electrocatalytic and bioelectrochemical systems were proposed to treat typical β -lactam antibiotics (penicillin) wastewater. The penicillin wastewater was oxidized by a boron-doped diamond (BDD) electrocatalytic electrode and then steadily treated by a bioelectrochemical system (BES)...
May 8, 2021: Huan Jing Ke Xue= Huanjing Kexue
James Kirby, Gina M Geiselman, Junko Yaegashi, Joonhoon Kim, Xun Zhuang, Mary Bao Tran-Gyamfi, Jan-Philip Prahl, Eric R Sundstrom, Yuqian Gao, Nathalie Munoz, Kristin E Burnum-Johnson, Veronica T Benites, Edward E K Baidoo, Anna Fuhrmann, Katharina Seibel, Bobbie-Jo M Webb-Robertson, Jeremy Zucker, Carrie D Nicora, Deepti Tanjore, Jon K Magnuson, Jeffrey M Skerker, John M Gladden
BACKGROUND: Mitigation of climate change requires that new routes for the production of fuels and chemicals be as oil-independent as possible. The microbial conversion of lignocellulosic feedstocks into terpene-based biofuels and bioproducts represents one such route. This work builds upon previous demonstrations that the single-celled carotenogenic basidiomycete, Rhodosporidium toruloides, is a promising host for the production of terpenes from lignocellulosic hydrolysates. RESULTS: This study focuses on the optimization of production of the monoterpene 1,8-cineole and the sesquiterpene α-bisabolene in R...
April 21, 2021: Biotechnology for Biofuels
László Koók, Jan Žitka, Szabolcs Szakács, Tamás Rózsenberszki, Miroslav Otmar, Nándor Nemestóthy, Katalin Bélafi-Bakó, Péter Bakonyi
In this work, a novel cation exchange membrane, PSEBS SU22 was deployed in microbial fuel cells (MFCs) to examine system efficacy in line with membrane characteristics and inoculum source. It turned out that compared to a reference membrane (Nafion), employing PSEBS SU22 resulted in higher current density and electricity generation kinetics, while the electron recoveries were similar (19-28%). These outcomes indicated more beneficial ion transfer features and lower mass transfer-related losses in the PSEBS SU22-MFCs, supported by membrane water uptake, ion exchange capacity, ionic conductivity and permselectivity...
April 15, 2021: Bioresource Technology
Mehwish Younas, Christina Psomas, Christelle Reynes, Renaud Cezar, Lucy Kundura, Pierre Portalès, Corinne Merle, Nadine Atoui, Céline Fernandez, Vincent Le Moing, Claudine Barbuat, Albert Sotto, Robert Sabatier, Audrey Winter, Pascale Fabbro, Thierry Vincent, Jacques Reynes, Pierre Corbeau
Chronic immune activation persists in persons living with HIV-1 even though they are aviremic under antiretroviral therapy, and fuels comorbidities. In previous studies, we have revealed that virologic responders present distinct profiles of immune activation, and that one of these profiles is related to microbial translocation. In the present work, we tested in 140 HIV-1-infected adults under efficient treatment for a mean duration of eight years whether low-level viremia might be another cause of immune activation...
2021: Frontiers in Immunology
Ademola Adekunle, Carrie Rickwood, Boris Tartakovsky
Real-time biomonitoring using microbial fuel cell (MFC) based biosensors have been demonstrated in several laboratory studies, but field validation is lacking. This study describes the long-term performance of an MFC based biosensor developed for real-time monitoring of changes in the water quality of a metal-contaminated stream. After a startup in the laboratory, biosensors were deployed in a stream close to an active mining complex in Sudbury, ON, Canada. Three sites within the stream were selected for biosensors installation based on their positions relative to the mining complex discharge points - upstream (lowest heavy metals concentration), midpoint and downstream...
April 13, 2021: Ecotoxicology
Sijie Huang, Mengmeng Shen, Zhiyong Jason Ren, Houkai Wu, Hao Yang, Buchun Si, Jianhan Lin, Zhidan Liu
Microbial stability and evolution are a critical aspect for biosensors, especially in detecting dynamic and emerging anaerobic biohythane production. In this study, two upflow air-cathode chamber microbial fuel cells (UMFCs) were developed for in situ monitoring of the biohydrogen and biomethane reactors under a COD range of 1000-6000 mg/L and 150-1000 mg/L, respectively. Illumina MiSeq sequencing evidenced the dramatic shift of dominant microbial communities in UMFCs from hydrolytic and acidification bacteria (Clostridiaceae_1, Ruminococcaceae, Peptostreptococcaceae) to acetate-oxidizing bacteria (Synergistaceae, Dysgonomonadaceae, Spirochaetaceae)...
April 7, 2021: Bioresource Technology
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