Forschungsdaten – Titel und Zusammenfassungen von Publikationen, extrahierte Daten und Katalogeinträge – erscheinen in ihrer Originalsprache Englisch.
Haiman Wang, Zhuang Miao, Lei Chao, Yafeng Li +1
A trickling-bed biocathode microbial electrochemical system (TB-MES) integrating biotrickling filters with biocathode MES was developed for simultaneous nitrogen removal and power generation from domestic wastewater. The system achieved 84.6% ammonium nitrogen removal, 70.1% total nitrogen removal, and 3.2 W/m³ maximum power density at optimal catholyte recirculation rate of 200 mL/min, while eliminating energy-intensive aeration. Microbial community analysis revealed spatial stratification of nitrifiers (Nitrosomonas, upper) and denitrifiers (Azoarcus, lower) driven by dissolved oxygen gradients.
Erstellt von der MESSAI-Extraktionspipeline · mit dem Quell-PDF abgleichen
Noch keine extrahierten Parameter – fordern Sie eine KI-Extraktion an, um diese Publikation mit den Literaturverteilungen zu vergleichen.
Dieser Publikation ist noch kein 3D-Modell zugeordnet. Die Parameterbereiche oben ordnen die berichteten Werte trotzdem in die Literaturverteilung ein.
Biocathode microbial electrochemical systems (MESs) that remove nitrogen compounds out of wastewater are of special interest for practice. High energy-input for aeration is one of the barriers that hinder their application on a wider scope. A trickling-bed biocathode MES (TB-MES) was developed by integrating biotrickling filters with a biocathode MES. By recirculating the catholyte and sprinkling it through a spray nozzle, the system was able to achieve a reoxygenation process, which could facilitate the creation of an aerobic and anoxic environment. At an optimal recirculation rate of 200 mL min−1, the TB-MES removed 87.2 ± 2.7% of ammonium nitrogen and 79.7 ± 2.5% of total nitrogen (TN), and simultaneously achieved a maximum power density of 3.8 ± 0.3 Wm−3. Comparable performances were achieved when treating domestic wastewater, which were 84.6 ± 2.4%, 70.1 ± 4.2%, and 3.2 ± 0.2 W m−3 for ammonium nitrogen removal, TN removal, and maximum power density. Pyrosequencing analysis revealed Nitrosomonas was more abundant in the upper portion of the carbon fiber brush biocathode (CFBup, 20.4%) and Azoarcus was more abundant in the lower portion (CFBbottom, 12.6%), which was probably caused by the difference in dissolved oxygen concentration in different parts of the biocathode. The TB-MES shows great promise for domestic wastewater treatment by employing biotrickling filters for oxygen supply in biocathode MES.