78 results match your criteria: "Aarhus University Centre for Water Technology[Affiliation]"
Environ Technol
December 2024
Department of Agroecology, Aarhus University, Aarhus, Denmark.
ACS Meas Sci Au
October 2024
Department of Biology-Microbiology, Aarhus University Centre for Water Technology, Ny Munkegade 116, 8000 Aarhus C, Denmark.
Chemical gradients are essential in biological systems, affecting processes like microbial activity in soils and nutrient cycling. Traditional tools, such as microsensors, offer high-resolution data but are limited to one-dimensional measurements. Planar optodes allow for two-dimensional (2D) and three-dimensional (3D) chemical imaging but are often sensitive to temperature changes.
View Article and Find Full Text PDFACS Sens
October 2024
Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark.
Optode-based chemical imaging is a rapidly evolving field that has substantially enhanced our understanding of the role of microenvironments and chemical gradients in biogeochemistry, microbial ecology, and biomedical sciences. Progress in sensor chemistry has resulted in a broadened spectrum of analytes, alongside enhancements in sensor performance (e.g.
View Article and Find Full Text PDFNat Rev Microbiol
September 2024
Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore, Singapore.
Microbial biofilms exhibit a self-produced matrix of extracellular polymeric substances (EPS), including polysaccharides, proteins, extracellular DNA and lipids. EPS promote interactions of the biofilm with other cells and sorption of organics, metals and chemical pollutants, and they facilitate cell adhesion at interfaces and ensure matrix cohesion. EPS have roles in various natural environments, such as soils, sediments and marine habitats.
View Article and Find Full Text PDFACS Sens
September 2024
Aarhus University Centre for Water Technology, Department of Biology, Section for Microbiology, Aarhus University, Ny Munkegade 114-1540, Aarhus C, 8000, Denmark.
While the pH cross-sensitivity of chromoionophore-based ion-selective optodes (ISOs) has often been regarded as a significant limitation, this paper demonstrates how this apparent drawback can be transformed into a beneficial feature. The response range of chromoionophore-based ISOs shifts proportionally with changes in the sample pH. Thus, integrating them with a stable pH gradient across the optode surface, such as those provided by immobilized pH gradient (IPG) gels, allows for significant enhancement of the effective measuring range of chromoionophore-based ISOs while preserving their maximum sensitivity.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
August 2024
Superintendencia del Medio Ambiente, Oficina Regional del Maule, Edificio Plaza Centro, Calle Uno Norte 801, piso 11, Talca, Chile.
This study comparatively evaluated effluent reuse from two TWs-a horizontal subsurface flow (HF) and a vertical subsurface flow (VF)-used for rural wastewater treatment in Central Chile during the initial operation stage. The two TWs were planted with Zantedeschia aethiopica and were operated for 10 months at a pilot scale. The water quality of the influent and effluents was measured and compared with reuse regulations.
View Article and Find Full Text PDFLab Chip
August 2024
Research Centre "E. Piaggio", University of Pisa, Pisa, Italy.
Accurate descriptions of the variability in single-cell oxygen consumption and its size-dependency are key to establishing more robust tissue models. By combining microfabricated devices with multiparameter identification algorithms, we demonstrate that single human hepatocytes exhibit an oxygen level-dependent consumption rate and that their maximal oxygen consumption rate is significantly lower than that of typical hepatic cell cultures. Moreover, we found that clusters of two or more cells competing for a limited oxygen supply reduced their maximal consumption rate, highlighting their ability to adapt to local resource availability and the presence of nearby cells.
View Article and Find Full Text PDFJ Hazard Mater
September 2024
Aarhus University Centre for Water Technology (WATEC), Aarhus University, Aarhus C, Denmark; Department of Biological and Chemical Engineering, Aarhus University, Aarhus C, Denmark. Electronic address:
Hydrothermal liquefaction (HTL) is a promising technology for converting wet organic waste such as sewage sludge into biocrude oil while simultaneously destroying per- and polyfluoroalkyl substances (PFAS). This study tracked the fate and degradation of six representative PFAS in water to address the effect of perfluoroalkyl chain length on degradation rates and the formation of volatile transformation products at 300-350 °C. While perfluorosulfonic acids were recalcitrant, perfluoroalkyl carboxylic acids (PFCAs) were rapidly and completely decarboxylated to hydroperfluoroalkanes (1 H-perfluoroheptane in the case of perfluorooctanoic acid).
View Article and Find Full Text PDFEnviron Res
September 2024
Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Vejlsøvej 25, 8600, Silkeborg, Denmark. Electronic address:
In an attempt to discover and characterize the plethora of xenobiotic substances, this study investigates chemical compounds released into the environment with wastewater effluents. A novel non-targeted screening methodology based on ultra-high resolution Orbitrap mass spectrometry and nanoflow ultra-high performance liquid chromatography together with a newly optimized data-processing pipeline were applied to effluent samples from two state-of-the-art and one small wastewater treatment facility. In total, 785 molecular structures were obtained, of which 38 were identified as single compounds, while 480 structures were identified at a putative level.
View Article and Find Full Text PDFBioresour Technol
May 2024
Department of Biological and Chemical Engineering, Aarhus University, Ole Worms Allé 3, 8000 Aarhus C, Denmark; Aarhus University Centre for Water Technology (WATEC), Aarhus University, Ole Worms Allé 3, 8000 Aarhus C, Denmark.
Hydrothermal liquefaction (HTL) shows promise for converting wet biomass waste into biofuel, but the resulting high-strength process water (PW) requires treatment. This study explored enhancing energy recovery by anaerobic digestion using semi-batch reactors. Co-digesting manure with HTL-PW from wheat straw-manure co-HTL yielded methane (43-49% of the chemical oxygen demand, COD) at concentrations up to 17.
View Article and Find Full Text PDFSci Total Environ
April 2024
Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec, Studentska 2, 460 01 Liberec, Czech Republic.
Hexachlorocyclohexanes (HCH) belong to the banned pesticides with short-time production and use during the last century. However, the consequences of this short period are still present as persistent environmental contamination. This study represents the large lab-scale experiment focused on the HCH accumulation and metabolism in selected wetland plants (Juncus effuses, Typha latifolia, Phragmites australis) and trees (Alnus glutinosa) after the exposure to the technical mix of HCH isomers (t-HCH) or δ-HCH at three different concentration.
View Article and Find Full Text PDFWater Sci Technol
December 2023
Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 7, Liberec 460 01, Czech Republic.
The hexachlorocyclohexane isomers (HCH) are long-banned pesticides. Even though their use has been prohibited for decades, their presence in the environment is still reported worldwide. Wetland + is a registered trademark of the remedial treatment technology consisting of an aerobic sedimentary tank, a permeable reactive barrier, a biosorption system, and an aerobic wetland.
View Article and Find Full Text PDFMar Pollut Bull
February 2024
SINTEF Ocean, Department of Climate and Environment, Brattørkaia 17b, 7010 Trondheim, Norway. Electronic address:
Marine oil spills have devastating environmental impacts and extrapolation of experimental fate and impact data from the lab to the field remains challenging due to the lack of comparable field data. In this work we compared two field systems used to study in situ oil depletion with emphasis on biodegradation and associated microbial communities. The systems were based on (i) oil impregnated clay beads and (ii) hydrophobic Fluortex adsorbents coated with thin oil films.
View Article and Find Full Text PDFAnalyst
December 2023
Aarhus University Centre for Water Technology, Department of Biology - Microbiology, Ny Munkegade 116, 8000 Aarhus C, Denmark.
Chemical gradients and uneven distribution of analytes are common in natural and artificial systems. As a result, the ability to visualize chemical distributions in two or more dimensions has gained significant importance in recent years. This has led to the integration of chemical imaging techniques into all domains of analytical chemistry.
View Article and Find Full Text PDFWater Sci Technol
October 2023
Faculty of Engineering, Water & Energy Research Group, Universidad Militar Nueva Granada, Cra. 11 No 101-80, Bogotá, Colombia.
Coffee is one of the most important agricultural products in Colombia. To date, small-scale Colombian coffee growers have developed this activity with a simple infrastructure and random use of water that generates harmful by-products to the water resource mainly in the stage of separation of the mucilage. The coffee mucilage wastewater (CMW) is composed of high organic loads and its impact on water sources is due to its high load of nutrients such as nitrogen (N), phosphorus (P), and chemical oxygen demand (COD) values of over 25,000 mg/L.
View Article and Find Full Text PDFAnalyst
November 2023
Aarhus University Centre for Water Technology, Department of Biology, Section for Microbiology, Aarhus University, Aarhus, Denmark.
Accurate measurement of pH-dependent analytes is crucial for a wide range of applications, including environmental monitoring, industrial processes, and healthcare diagnostics. In multi-sensor systems, combining data from multiple sensors offers the potential for more comprehensive analysis, yet it is important to be aware of the limitations of this approach. In this paper, we investigate the often-overlooked issue of response time mismatch among sensors, which can introduce significant errors in calculated sum parameters.
View Article and Find Full Text PDFBiotechnol Biofuels Bioprod
October 2023
Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore.
Background: Alcohol is a good and environment-friendly fuel that can be microbially produced, capable of eliminating many of the limitations of the present-day fossil fuels. However, the inherent toxic nature of alcohols to the microbial cells leads to end-product inhibition that limits large-scale alcohol production by fermentation. Fundamental knowledge about the stress responses of microorganisms to alcohols would greatly facilitate to improve the microbial alcohol tolerance.
View Article and Find Full Text PDFWater Sci Technol
September 2023
Department of Biology - Aquatic Biology, Aarhus University, Nordre Ringgade 1, 8000, Aarhus C, Denmark; WATEC Aarhus University Centre for Water Technology, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Aarhus C, Denmark.
This work aimed to evaluate the performance of modified vertical flow treatment wetlands (VF-TWs) in terms of depth and medium to assess the effect of the feeding/resting periods and footprint (FP). The modifications were proposed for treating domestic wastewater in rural areas with flow variations such as tourist sites. The experimental setup included six laboratory-scale VF-TWs: (a) normal (VF-N), bed depth 1.
View Article and Find Full Text PDFSci Total Environ
December 2023
University of Copenhagen, Department of Plant & Environmental Sciences, Thorvaldsensvej 40, 1821 Frederiksberg, Denmark.
Recycling of phosphorus (P) from waste streams in agriculture is essential to reduce the negative environmental effects of surplus P and the unsustainable mining of geological P resources. Sewage sludge (SS) is an important P source; however, several issues are associated with the handling and application of SS in agriculture. Thus, post-treatments such as pyrolysis of SS into biochar (BC) could address some of these issues.
View Article and Find Full Text PDFACS Sens
July 2023
Department of Chemistry and Coastal People: Southern Skies Centre of Research Excellence, University of Otago, Dunedin 9016, New Zealand.
Although there is a growing demand for new sensors for environmental monitoring, biofouling continues to plague current sensors and sensing networks. As soon as a sensor is placed in water, the formation of a biofilm begins. Once a biofilm is established, reliable measurements are often no longer possible.
View Article and Find Full Text PDFACS Sens
July 2023
Aarhus University Centre for Water Technology, Department of Biology, Section for Microbiology, Aarhus University, Aarhus 8000, Denmark.
Dissolved inorganic carbon (DIC) is a key component of the global carbon cycle and plays a critical role in ocean acidification and proliferation of phototrophs. Its quantification at a high spatial resolution is essential for understanding various biogeochemical processes. We present an analytical method for 2D chemical imaging of DIC by combining a conventional CO optode with localized electrochemical acidification from a polyaniline (PANI)-coated stainless-steel mesh electrode.
View Article and Find Full Text PDFEnviron Monit Assess
June 2023
Department of Food and Resource Economics, University of Copenhagen, Rolighedsvej 23, 1958, Frederiksberg, Denmark.
Nitrogen (N) and phosphorus (P) losses to surface and coastal waters are still critically high across Europe and globally. Measures to mitigate and reduce these losses are being implemented both at the cultivated land surface and at the edge-of-fields. Woodchip bioreactors represent a new alternative in Denmark for treating agricultural drainage water, and the present study-based on two years of data from five Danish field-based bioreactors-determined N removal rates varying from 1.
View Article and Find Full Text PDFAnal Methods
June 2023
University of Otago, Department of Chemistry, Dunedin 9016, New Zealand.
Biofouling is a major challenge in environmental sensing. Current mitigation strategies are often expensive, energy consuming or require toxic chemicals. In this contribution electrochemical biofouling control is evaluated as an alternative approach to reduce biofouling on an optical O sensor (optode).
View Article and Find Full Text PDFAnal Bioanal Chem
June 2023
Aarhus University Centre for Water Technology (WATEC), Department of Biology, Section for Microbiology, Aarhus University, Ny Munkegade 114, 8000, Aarhus C, Denmark.
Simultaneous sensing of metabolic analytes such as pH and O is critical in complex and heterogeneous biological environments where analytes often are interrelated. However, measuring all target analytes at the same time and position is often challenging. A major challenge preventing further progress occurs when sensor signals cannot be directly correlated to analyte concentrations due to additional effects, overshadowing and complicating the actual correlations.
View Article and Find Full Text PDFISME J
June 2023
Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, 637551, Singapore.
Extracellular polymeric substances (EPS) are core biofilm components, yet how they mediate interactions within and contribute to the structuring of biofilms is largely unknown, particularly for non-culturable microbial communities that predominate in environmental habitats. To address this knowledge gap, we explored the role of EPS in an anaerobic ammonium oxidation (anammox) biofilm. An extracellular glycoprotein, BROSI_A1236, from an anammox bacterium, formed envelopes around the anammox cells, supporting its identification as a surface (S-) layer protein.
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