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Microbial electrosynthesis of acetate from CO_(2)under hypersaline conditions

Environmental Science and Ecotechnology 2023年第1期13卷 86-95页

作者： Xiaoting Zhang Tyler Arbour Daijun Zhang Shiqiang Wei korneel rabaey College of Resources and Environment Southwest UniversityChongqing400715China Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 6539000GhentBelgium State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400044China Center for Advanced Process Technology for Urban Resource Recovery(CAPTURE) Frieda Saeysstraat 19052GhentBelgium

Microbial electrosynthesis(MES)enables the bioproduction of multicarbon compounds from CO_(2)using electricity as the *** high salinity can improve the energetic performance of bioelectrochemical systems,acetogenic processes under elevated salinity are poorly *** MES under 35e60 g L^(-1)salinity was *** production in two-chamber MES systems at 35 g L^(-1)salinity(seawater composition)gradually decreased within 60 days,both under-1.2 V cathode potential(***/AgCl)and^(-1).56 A m^(-2)reductive *** precipitation on cathodes(mostly CaCO3)likely declined the production through inhibiting CO_(2)supply,the direct electrode contact for acetogens and H2 *** decreasing Ca2t and Mg2t levels in three-chamber reactors,acetate was stably produced over 137 days along with a low cathode apparent resistance at 1.9±0.6 mU m^(2)and an average production rate at 3.80±0.21 g m^(-2)d^(-1).Increasing the salinity step-wise from 35 to 60 g L^(-1)gave the most efficient acetate production at 40 g L^(-1)salinity with average rates of acetate production and CO_(2)consumption at 4.56±3.09 and 7.02±4.75 g m^(-2)d^(-1),*** instantaneous coulombic efficiency for VFA averaged 55.1±31.4%.Acetate production dropped at higher salinity likely due to the inhibited CO_(2)dissolution and acetogenic *** up to 78%was enriched on cathodes as the main acetogen at 35 g L^(-1).Under high-salinity selection,96.5%Acetobacterium dominated on the cathode along with 34.0%Sphaerochaeta in *** research provides a first proof of concept that MES starting from CO_(2)reduction can be achieved at elevated salinity.

关键词： Carbon capture and utilization High salinity Carbonate precipitates Acetogenesis Marine bacteria

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High rate production of concentrated sulfides from metal bearing wastewater in an expanded bed hydrogenotrophic sulfate reducing bioreactor

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Environmental Science and Ecotechnology 2022年第3期11卷 49-56页

作者： Pieter Ostermeyer Josefien Van Landuyt Luiza Bonin Karel Folens Adam Williamson Tom Hennebel korneel rabaey Center of Microbial Ecology and Technology(CMET) Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GentBelgium CAPTURE Frieda Saeysstraat 19000GentBelgium CENBG Universite de BordeauxCNRS-IN2P3/19 chemin du SolariumCS1012033175GradignanFrance Umicore Group Research&DevelopmentCompetence Area Recycling and Extraction TechnologiesWatertorenstraat 33B-2250OlenBelgium

Metallurgical wastewaters contain high concentrations of sulfate,up to 15 g L^(-1).Sulfate-reducing bioreactors are employed to treat these wastewaters,reducing sulfates to sulfides which subsequently coprecipitate *** loading and reduction rates are typically restricted by the total H2S *** stripping,sulfide precipitation and dilution are the main strategies employed to minimize inhibition by H2S,but can be adversely compromised by suboptimal sulfate reduction,clogging and additional energy ***,metallurgical wastewater was treated for over 250 days using two hydrogenotrophic granular activated carbon expanded bed bioreactors without additional removal of sulfides.H2S toxicity was minimized by operating at pH 8±0.15,resulting in an average sulfate removal of 7.08±0.08 g L^(-1),sulfide concentrations of 2.1±0.2 g L^(-1) and peaks up to 2.3±0.2 g L^(-1).A sulfate reduction rate of 20.6±0.9 g L^(-1)d^(-1) was achieved,with maxima up to 27.2 g L^(-1)d^(-1),which is among the highest reported considering a literature review of 39 *** rates reported here are 6e8 times higher than those reported for other reactors without active sulfide removal and the only reported for expanded bed sulfate-reducing bioreactors using *** increasing the influent sulfate concentration and maintaining high sulfide concentrations,sulfate reducers were promoted while fermenters and methanogens were *** wastewater containing 4.4 g L^(-1) sulfate,0.036 g L^(-1) nitrate and various metals(As,Fe,Tl,Zn,Ni,Sb,Co and Cd)was successfully treated with all metal(loid)s,nitrates and sulfates removed below discharge limits.

关键词： Sulfate reduction Sulfides High rate Metallurgical wastewater Hydrogenotrophic expanded bed Microbial community analysis

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Electrochemically assisted production of biogenic palladium nanoparticles for the catalytic removal of micropollutants in wastewater treatment plants effluent

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Journal of Environmental Sciences 2023年第6期128卷 203-212页

作者： Cindy Ka Y Law Kankana Kundu Luiza Bonin Lorena Peñcoba-Antona Eduardo Bolea-Fernandez Frank Vanhaecke korneel rabaey Abraham Esteve-Nez Bart De Gusseme Nico Boon Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 653B-9000 GentBelgium Centre for Advanced Process Technology for Urban Resource recovery(CAPTURE) P.O.Frieda Saeysstraat 1B-9000 GentBelgium METfilter S.L. Autovía A49 Sevilla-Huelva Km 2841820 Carrión de los CéspedesSevillaSpain IMDEA Water Institute Av.Punto Com2Parque Científico Tecnológico28805 Alcaláde HenaresMadridSpain Atomic&Mass Spectrometry(A&MS)research group Department of ChemistryGhent UniversityCampus SterreKrijgslaan 281-S12B-9000 GhentBelgium Universidad de Alcalá Department of Analytical ChemistryPhysical Chemistry and Chemical EngineeringCtra.Madrid-Barcelona Km 33.60028871 Alcaláde HenaresMadridSpain

Biogenic palladium nanoparticles(bio-Pd NPs)are used for the reductive transformation and/or dehalogenation of persistent *** this work,H2(electron donor)was produced in situ by an electrochemical cell,permitting steered production of differently sized bio-Pd *** catalytic activity was first assessed by the degradation of methyl *** NPs showing the highest catalytic activity were selected for the removal of micropollutants from secondary treated municipal *** synthesis at different H2 flow rates(0.310 L/hr or 0.646 L/hr)influenced the bio-Pd NPs *** NPs produced over 6 hr at a lowH2 flow rate had a larger size(D50=39.0 nm)than those produced in 3 hr at a high H2 flow rate(D50=23.2 nm).Removal of 92.1%and 44.3%of methyl orange was obtained after 30 min for the NPs with sizes of 39.0 nm and 23.2 nm,***-Pd NPs of 39.0 nm were used to treat micropollutants present in secondary treated municipal wastewater at concentrations ranging fromμg/L to ng/*** removal of 8 compounds was observed:ibuprofen(69.5%)94.3%)90%***,these data indicate that the size,and thus the catalytic activity of the NPs can be steered and that the removal of challengingmicropollutants at environmentally relevant concentrations can be achieved through the use of bio-Pd NPs.

关键词： Antibiotics Adsorption Biogenic palladium nanoparticles Catalytic activity H2 Secondary treated municipal wastewater

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Enhancement of biogas potential of primary sludge by co-digestion with cow manure and brewery sludge

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International Journal of Agricultural and Biological Engineering 2015年第4期8卷 86-94页

作者： Irene Nansubuga Noble Banadda Mohammed Babu Jo De Vrieze Willy Verstraete korneel rabaey Laboratory of Microbial Ecology and Technology(LabMET) Ghent UniversityCoupure links 653B-9000 GentBelgium Department of Agricultural and Bio-Systems Engineering Makerere UniversityP.O.Box 7062KampalaUganda National Water and Sewerage corporation Plot 39Jinja RoadP.O.Box 7053KampalaUganda

Anaerobic digestion(AD)has long been used to treat different types of organic wastes especially in the developed ***,organic wastes are still more often considered as a waste instead of a resource in the developing world,which contributes to environmental pollution arising from their *** study has been conducted at Bugolobi Sewage Treatment Plant(BSTP),where two organic wastes,cow manure and brewery sludge were co-digested with primary sludge in different *** study was done in lab-scale reactors at mesophilic temperature and sludge retention time of 20 *** main objective was to evaluate the biodegradability of primary sludge generated at BSTP,Kampala,Uganda and enhance its ability of biogas *** the brewery sludge was added to primary STP sludge at all proportions,the biogas production rate increased by a factor of *** was significantly(p<0.001)higher than observed gas yield(337±18)mL/(L·d))in the control treatment containing(only STP sludge).Co-digesting STP sludge with cow manure did not show different results compared to the control *** conclusion,Bugolobi STP sludge is poorly anaerobically degradable with low biogas production but co-digestion with brewery sludge enhanced the biogas production rate,while co-digestion with cow manure was not beneficial.

关键词： wastewater treatment co-digestion cow manure brewery primary sludge biogas energy recovery

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In silico assessment of household level closed water cycles:Towards extreme decentralization

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Environmental Science and Ecotechnology 2022年第2期10卷 1-11页

作者： Arjen Van de Walle Elena Torfs Dorien Gaublomme korneel rabaey Center for Microbial Ecology and Technology Ghent UniversityCoupure Links 6539000GhentBelgium Center for Advanced Process Technology for Urban Resource Recovery(CAPTURE) Coupure Links 6539000GhentBelgium BIOMATH Department of Data Analysis and Mathematical ModellingGhent UniversityCoupure links 6539000GhentBelgium

Water management in most of the developed world is currently practiced in a highly centralized manner,leading to major infrastructure and energy costs to transport *** decrease the impacts of water scarcity and climate change,the decentralization of water can increase local *** extremis,decentralization can involve building or house level water supply and ***,we constructed a MATLAB/Simulink model for two decentralized water management configurations at the household level,assuming the socio-environmental setting of Flanders,*** from the potable water grid and sewer system was pursued through rainwater harvesting,reuse of wastewater streams fitfor-purpose,and discharge via *** mass balance for water was calculated over the system boundaries showing high potential for independence from the grid with a reasonable treatment train and storage ***,the risk of contaminant accumulation within the circular system was assessed,showing a key limitation on decentralized system performance necessitating a system *** to 59%of system rainwater usage was due to the replacement of this *** treatment units with high(95%)contaminant rejection efficiencies eliminated contaminant accumulation *** raw model output was quantitatively assessed by constructing four newly proposed key performance indicators(KPIs),quantifying system independence,circularity,drought tolerance and local water body recharge,which allowed for facilitated system comparison and communication to stakeholders.A sensitivity analysis was performed in which the effect of input parameter variability and uncertainty on system performance was *** sensitivity analysis showed the importance of water recovery and contaminant removal efficiencies of the applied treatment technologies on system performance when contaminant accumulation in the system forms an *** systems not severely affected by pollutant accumulation,para

关键词： Extreme decentralization Household-scale Water reuse Simulations

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Predicting the future is hard,but doable Editorial introduction to Young Lion(esse)s

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Environmental Science and Ecotechnology 2020年第2期2卷 86-87页

作者： korneel rabaey Environmental Science&Ecotechnology Ghent UniversityBelgium

It is said that the future cannot be *** is evidently not entirely *** cannot accurately predict unlikely ***,in science,much is predictable,and particularly young scientists and engineers(no offence to the advanced ones!)who spend their days justifying their position and going for high-risk funding are thinking about the future beyond the Petri dish or chromatogram on their bench today.

关键词： spend entirely Petri

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Greywater reuse as a key enabler for improving urban wastewater management

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Environmental Science and Ecotechnology 2023年第4期16卷 52-64页

作者： Arjen Van de Walle Minseok Kim Md Kawser Alam Xiaofei Wang Di Wu Smruti Ranjan Dash korneel rabaey Jeonghwan Kim Center for Microbial Ecology and Technology Ghent University9052GhentBelgium Department of Environmental Engineering Program of Environmental and Polymeric EngineeringInha University22212IncheonRepublic of Korea Center for Environmental and Energy Research Ghent University Global Campus119-5IncheonRepublic of Korea

Sustainable water management is essential to guaranteeing access to safe water and addressing the challenges posed by climate change,urbanization,and population *** a typical household,greywater,which includes everything but toilet waste,constitutes 50e80%of daily wastewater generation and is characterized by low organic strength and high *** can be an issue for large urban wastewater treatment plants designed for high-strength *** of greywater at the source for decentralized wastewater treatment is therefore necessary for its proper management using separate treatment *** reuse may thus lead to increased resilience and adaptability of local water systems,reduction in transport costs,and achievement of fit-for-purpose *** covering greywater characteristics,we present an overview of existing and upcoming technologies for greywater *** treatment technologies,such as nature-based technologies,biofilm technologies,and membrane bioreactors(MBR),conjugate with physicochemical treatment methods,such as membrane filtration,sorption and ion exchange technologies,and ultraviolet(UV)disinfection,may be able to produce treated water within the allowable parameters for *** also provide a novel way to tackle challenges like the demographic variance of greywater quality,lack of a legal framework for greywater management,monitoring and control systems,and the consumer perspective on greywater ***,benefits,such as the potential water and energy savings and sustainable future of greywater reuse in an urban context,are discussed.

关键词： Greywater reuse Urban wastewater Decentralized wastewater treatment Sustainable wastewater management

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面向有机污染物消除的“微生物、植物、电”多效耦合作用机制及低能耗型修复技术

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生物工程学报 2021年第10期37卷 3405-3410页

作者：刘双江 Philippe F.-X.Corvini korneel rabaey 中国科学院微生物研究所微生物资源国家重点实验室北京100101 山东大学微生物技术国家重点实验室山东青岛266237 School of Life Sciences University of Applied Sciences and Arts Northwestern SwitzerlandMuttenz 4132Switzerland 南京大学环境学院江苏南京210023 Center for Microbial Ecology and Technology(CMET) Ghent UniversityGhentBelgium

中欧合作项目“面向有机污染物消除的‘微生物、植物、电’多效耦合作用机制及低能耗型修复技术”是由中国国家自然科学基金委和欧盟共同资助的重大国际合作项目。该项目研究领域属于环境生物技术,研究团队包括5个中方单位和17个欧方单... 详细信息

中欧合作项目“面向有机污染物消除的‘微生物、植物、电’多效耦合作用机制及低能耗型修复技术”是由中国国家自然科学基金委和欧盟共同资助的重大国际合作项目。该项目研究领域属于环境生物技术,研究团队包括5个中方单位和17个欧方单位,项目主要围绕新有机污染物的生物降解过程和机制、低能耗生物修复技术开展研究工作。项目执行2年来,在降解污染物的微生物资源、弱电介入增效生物降解和强化电子传递、微生物3D打印等方面取得了阶段性成果的同时,项目团队还开展了有效的交流和实质性合作。未来,项目团队将克服新冠疫情影响,强化中欧双方团队内部和团队之间的合作交流,全面实现项目科学目标,圆满完成国际合作任务。

关键词：中国-欧盟合作环境生物技术新有机污染物生物降解弱电低能耗生物修复技术

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中欧环境和微生物科学家:共同担当起保护地球家园的责任

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生物工程学报 2021年第10期37卷 3401-3404页

作者：刘双江季荣 Philippe F.-X.Corvini korneel rabaey 山东大学微生物技术国家重点实验室山东青岛266237 中国科学院微生物研究所微生物资源国家重点实验室北京100101 南京大学环境学院江苏南京210023 School of Life Sciences University of Applied Sciences and Arts Northwestern SwitzerlandMuttenz 4132Switzerland Center for Microbial Ecology and Technology(CMET) Ghent UniversityGhentBelgium

国际科技合作是促进科技进步和人类社会文明发展的重要举措,在环境保护和维护地球生态系统良好运行的目标下,最容易达成共识。中国国家自然科学基金委员会和欧盟委员会2018年和2019年分别发布了在环境生物技术领域合作的项目指南,共同... 详细信息

国际科技合作是促进科技进步和人类社会文明发展的重要举措,在环境保护和维护地球生态系统良好运行的目标下,最容易达成共识。中国国家自然科学基金委员会和欧盟委员会2018年和2019年分别发布了在环境生物技术领域合作的项目指南,共同支持环境生物修复技术和塑料降解微生物菌群相关领域的基础研究和成果转化。本专刊邀请了相关项目负责人介绍合作框架内项目的设计思想、主要内容以及获得的进展,并收录了在环境生物修复技术领域的基础研究和成果转化方面的论文23篇。

关键词：生物修复环境保护中国欧盟国际合作

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Microbial electrochemistry for bioremediation

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Environmental Science and Ecotechnology 2020年第1期1卷 85-91页

作者： Xiaofei Wang Federico Aulenta Sebastia Puig Abraham Esteve-Nunez Yujie He Yang Mu korneel rabaey Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 6539000GhentBelgium Centre for Advanced Process Technology for Urban Resource Recovery(CAPTURE) Ghent UniversityBelgium Water Research Institute(IRSA) National Research Council(CNR)Via Salaria Km 2930000015MonterotondoRMItaly LEQUiA.Institute of the Environment University of GironaCampus Montilivi.C/Maria Aurelia Capmany69E-17003GironaCataloniaSpain Department of Analytical Chemistry and Chemical Engineering University of AlcalaCampus UniversitarioCtra.Madrid-Barcelona Km 33.60028871Alcala de HenaresSpain State Key Laboratory of Pollution Control and Resource Reuse(SKL-PCRR) School of the EnvironmentNanjing UniversityXianlin Avenue 163Nanjing210023China Department of Applied Chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui230026China

Lack of suitable electron donors or acceptors is in many cases the key reason for pollutants to persist in the *** supplementation of electron donors or acceptors is often difficult to control and/or involves chemical additions with limited lifespan,residue formation or other adverse side *** electrochemistry has evolved very fast in the past years–this field relates to the study of electrochemical interactions between microorganisms and solid-state electron donors or *** can be supplied in such so-called bioelectrochemical systems(BESs)at low voltage to provide or extract electrons in a very precise manner.A plethora of metabolisms can be linked to electrical current now,from metals reductions to denitrification and *** this perspective,we provide an overview of the emerging applications of BES and derived technologies towards the bioremediation field and outline how this approach can be game changing.

关键词： electrochemistry precise residue

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