Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Role of Microorganisms in a Full‐Scale Sequencing Batch Reactor Under Low Aeration and Different Cycle Times
This study describes the role of microorganisms in a full‐scale step‐feed sequencing batch reactor (SBR) system for urban wastewater treatment. Chemical profiles for three different cycle times were measured under low aeration conditions with a high carbon‐to‐nitrogen ratio. The applied organic load was above 1.0 g chemical oxygen demand (COD)/L·d. The removal efficiencies were higher than 81%, 93%, and 76% for soluble COD, N‐, and total Kjeldahl nitrogen, respectively. The ratio of volatile suspended solids (VSS) to total suspended solids was 78%, and the food‐to‐microorganism ratio was an average of 1.41 g COD/g VSS·d. The active biomass was comprised of 87.8% heterotrophic and 12.2% autotrophic organisms. Nitrifying organisms were found with a low amount of ammonia‐oxidizing bacteria (5%) and a much higher amount of nitrite‐oxidizing bacteria. Polyphosphate‐accumulating organisms (PAOs) were found at high amounts (25%) compared to glycogen‐accumulating organisms, even in a system with a high carbon to phosphorus ratio. The activity of denitrifying PAOs was 72%.
The Role of Microorganisms in a Full‐Scale Sequencing Batch Reactor Under Low Aeration and Different Cycle Times
This study describes the role of microorganisms in a full‐scale step‐feed sequencing batch reactor (SBR) system for urban wastewater treatment. Chemical profiles for three different cycle times were measured under low aeration conditions with a high carbon‐to‐nitrogen ratio. The applied organic load was above 1.0 g chemical oxygen demand (COD)/L·d. The removal efficiencies were higher than 81%, 93%, and 76% for soluble COD, N‐, and total Kjeldahl nitrogen, respectively. The ratio of volatile suspended solids (VSS) to total suspended solids was 78%, and the food‐to‐microorganism ratio was an average of 1.41 g COD/g VSS·d. The active biomass was comprised of 87.8% heterotrophic and 12.2% autotrophic organisms. Nitrifying organisms were found with a low amount of ammonia‐oxidizing bacteria (5%) and a much higher amount of nitrite‐oxidizing bacteria. Polyphosphate‐accumulating organisms (PAOs) were found at high amounts (25%) compared to glycogen‐accumulating organisms, even in a system with a high carbon to phosphorus ratio. The activity of denitrifying PAOs was 72%.
The Role of Microorganisms in a Full‐Scale Sequencing Batch Reactor Under Low Aeration and Different Cycle Times
Fernandes, Heloísa (Autor:in) / Hoffmann, Heike (Autor:in) / Antonio, Regina V. (Autor:in) / Costa, Rejane H. R. (Autor:in)
Water Environment Research ; 86 ; 800-809
01.09.2014
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Taylor & Francis Verlag | 2020
| DOAJ | 2023