| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gernaey, Krist V.
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Production of phosphate biofertilizers as a booster for the techno-economic and environmental performance of a first-generation sugarcane ethanol and sugar biorefinerycitations
- 2023The effects of low oxidation-reduction potential on the performance of full-scale hybrid membrane-aerated biofilm reactorscitations
- 2022Economic and environmental analysis of bio-succinic acid production: from established processes to a new continuous fermentation approach with in-situ electrolytic extractioncitations
- 2019A Simulation-Based Superstructure Optimization Approach for Process Synthesis and Design Under Uncertainty
- 2018Mechanistic modeling of cyclic voltammetry: A helpful tool for understanding biosensor principles and supporting design optimizationcitations
- 2018Rapid and Efficient Development of Downstream Bio-Pharmaceutical Processing Alternatives
- 2014The Electrical Breakdown of Thin Dielectric Elastomerscitations
- 2013Applying mechanistic models in bioprocess development.citations
- 2013Applying mechanistic models in bioprocess development.citations
- 2012Evaluation of the energy efficiency of enzyme fermentation by mechanistic modelingcitations
- 2010Embedded resistance wire as a heating element for temperature control in microbioreactorscitations
- 2008Multivariate models for prediction of rheological characteristics of filamentous fermentation broth from the size distributioncitations
Places of action
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article
The effects of low oxidation-reduction potential on the performance of full-scale hybrid membrane-aerated biofilm reactors
Abstract
<p>Membrane-Aerated Biofilm Reactors (MABRs) are becoming a popular process intensification alternative within wastewater treatment plants (WWTP). Indeed, the nitrogen removal capacity of aerobic/anoxic/anaerobic reactors can be substantially enhanced with reduced energy consumption and footprint requirements. However, little is known about how oxidation–reduction potential (ORP) may impact their overall process performance. This study aims to report some of these effects by showing the results of almost three years of monitoring of two hybrid MABRs (R1, R2) adjacent to an existing Biodenipho™ facility. In Period 1 (P1), R1 and R2 were fed with anaerobic mixed liquor from the selector for the biological phosphorus removal zone. In Period 2 (P2), external aeration was introduced to increase ORP values (R1, R2), and membranes were replaced (R1) or cleaned (R2). Results show an increase in nitrification rates: from 0.27 and 0.33 g N m<sup>−2</sup> d<sup>−1</sup> in R1/R2 during P1 to 1.0 and 0.80 g N m<sup>−2</sup> d<sup>−1</sup> in R1/R2 during P2. 16 s rRNA amplicon sequencing analysis revealed that the relative abundance of nitrifying organisms increased from 0.2 to 6.7 % in R1 and 0.8 to 5.3 % in R2 in P2 (in detriment of microbes with fermenting capabilities). Energy dispersive X-ray spectroscopy confirmed the presence of coating substances under the lowest ORP (P1), which could be pyrite and its precursors like mackinawite. Overall, it is hypothesized that low ORP conditions (P1) had a detrimental effect on nitrification performance, as it promoted the reduction of different iron and sulfur compounds, which in turn a) precipitate in the biofilm as FeS increasing mass transfer limitations and competing with biomass for space; b) re-oxidize increasing the internal oxygen demand; c) inhibit nitrifiers growth.</p>