| 1. |
- van Hullebusch, E. D., et al.
(author)
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Nature-based units as building blocks for resource recovery systems in cities
- 2021
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In: Water. - : MDPI AG. - 2073-4441. ; 13:22
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Journal article (peer-reviewed)abstract
- Cities are producers of high quantities of secondary liquid and solid streams that are still poorly utilized within urban systems. In order to tackle this issue, there has been an ever-growing push for more efficient resource management and waste prevention in urban areas, following the concept of a circular economy. This review paper provides a characterization of urban solid and liquid resource flows (including water, nutrients, metals, potential energy, and organics), which pass through selected nature-based solutions (NBS) and supporting units (SU), expanding on that characterization through the study of existing cases. In particular, this paper presents the currently implemented NBS units for resource recovery, the applicable solid and liquid urban waste streams and the SU dedicated to increasing the quality and minimizing hazards of specific streams at the source level (e.g., concentrated fertilizers, disinfected recovered products). The recovery efficiency of systems, where NBS and SU are combined, operated at a micro-or meso-scale and applied at technology readiness levels higher than 5, is reviewed. The importance of collection and transport infrastructure, treatment and recovery technology, and (urban) agricultural or urban green reuse on the quantity and quality of input and output materials are discussed, also regarding the current main circularity and application challenges.
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| 2. |
- Hendrickx, T.L.G., et al.
(author)
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High specific activity for anammox bacteria enriched from activated sludge at 10°C
- 2014
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In: Bioresource Technology. - : Elsevier BV. - 0960-8524 .- 1873-2976. ; 163, s. 214-222
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Journal article (peer-reviewed)abstract
- Anammox in the water line of a waste water treatment plant (WWTP) saves energy for aeration and allows for recovering biogas from organic material. Main challenges for applying the anammox process in the water line are related to the low temperature of
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| 3. |
- Kampman, Christel, 1984, et al.
(author)
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Effect of temperature on denitrifying methanotrophic activity of 'Candidatus Methylomirabilis oxyfera'
- 2014
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 70:10, s. 1683-1689
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Journal article (peer-reviewed)abstract
- The activity of denitrifying methanotrophic bacteria at 11-30 °C was assessed in short-term experiments. The aim was to determine the feasibility of applying denitrifying methanotrophic bacteria in low-temperature anaerobic wastewater treatment. This study showed that biomass enriched at 21 °C had an optimum temperature of 20-25 °C and that activity dropped as temperature was increased to 30 °C. Biomass enriched at 30 °C had an optimum temperature of 25-30 °C. These results indicated that biomass from low-temperature inocula adjusted to the enrichment temperature and that low-temperature enrichment is suitable for applications in low-temperature wastewater treatment. Biomass growth at ≤20 °C still needs to be studied.
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| 4. |
- Flori, Serena, et al.
(author)
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Plastid thylakoid architecture optimizes photosynthesis in diatoms
- 2017
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In: Nature Communications. - : Springer Nature. - 2041-1723. ; 8:1
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Journal article (peer-reviewed)abstract
- Photosynthesis is a unique process that allows independent colonization of the land by plants and of the oceans by phytoplankton. Although the photosynthesis process is well understood in plants, we are still unlocking the mechanisms evolved by phytoplankton to achieve extremely efficient photosynthesis. Here, we combine biochemical, structural and in vivo physiological studies to unravel the structure of the plastid in diatoms, prominent marine eukaryotes. Biochemical and immunolocalization analyses reveal segregation of photosynthetic complexes in the loosely stacked thylakoid membranes typical of diatoms. Separation of photosystems within subdomains minimizes their physical contacts, as required for improved light utilization. Chloroplast 3D reconstruction and in vivo spectroscopy show that these subdomains are interconnected, ensuring fast equilibration of electron carriers for efficient optimum photosynthesis. Thus, diatoms and plants have converged towards a similar functional distribution of the photosystems although via different thylakoid architectures, which likely evolved independently in the land and the ocean.
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