DUYỆT THEO

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Tìm kiếm theo: Tác giả Layer, M.

Duyệt theo: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Kết quả tìm kiếm từ 1 đến 3 trong 3 kết quả
  • BB

  • Limited simultaneous nitrification-denitrification (SND) in aerobic granular sludge systems treating municipal wastewater: Mechanisms and practical implications

    • Tác giả: Layer, M.;  Người hướng dẫn: -;  Người tham gia: Villodres, M.G.; Hernandez, A.; Reynaert, E.; Morgenroth, E.; Derlon, N. (2020)

  • The development of anoxic zones is driven by the utilisation of oxygen in the upper layers of the granule leading to transport limitations of oxygen inside the granule; this effect is closely linked to granule size and wastewater composition. Development of anoxic zones during the aerobic phase is limited for small granules at constant aeration at bulk dissolved oxygen (DO) concentration of 2 mgO2 L−1, and anoxic zones only develop during a brief period of the aerated phase for large granules. Modelling results further indicate that a large fraction of electron-donors are actually utilised in aerobic rather than anoxic redox zones – in the bulk or at the granule surface. Thus, full SN...
  • BB

  • Organic substrate diffusibility governs microbial community composition, nutrient removal performance and kinetics of granulation of aerobic granular sludge

    • Tác giả: Layer, M.;  Người hướng dẫn: -;  Người tham gia: Adler, A.; Reynaert, E.; Hernandez, A.; Pagni, M.; Morgenroth, E.; Holliger, C.; Derlon, N. (2019)

  • Additionally, non-diffusible organic substrates give a competitive advantage to the main opponents of AGS formation – ordinary heterotrophic organisms (OHO). Both of these mechanisms are suspected to limit AGS formation. The presented study has relevant implications for both practice and research. Start-up duration of AGS systems treating high complexity WW were one order of magnitude higher than a typical lab-scale system treating VFA-rich synthetic WW, and biomass as flocs persisted as a significant fraction. Finally, the complex synthetic influent WW – composed of VFA, soluble fermentable and particulate substrate - tested here seems to be a more adequate surrogate of real municipa...
  • BB

  • Particulate substrate retention in plug-flow and fully-mixed conditions during operation of aerobic granular sludge systems

    • Tác giả: Layer, M.;  Người hướng dẫn: -;  Người tham gia: Bock, K.; Ranzinger, F.; Horn, H.; Morgenroth, E.; Derlon, N. (2020)

  • Hence, large fractions of influent XB likely re-suspended during aerobic fully-mixed conditions, where XB then preferentially and rapidly attached to the flocs. During fully-mixed conditions, increasing floc fractions, longer mixing times and larger XB concentrations increased XB retention. Elevated XB retention was observed after short mixing times < 60 min when flocs were present, and the contribution of flocs towards XB retention was even more pronounced for short mixing times < 5 min. Overall, our results suggest that flocs occupy an environmental niche that results from the availability of XB during aerobic fully-mixed conditions of AGS SBR. Therefore, a complete wash-out of floc...