Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Ноя. 28, 2024

Applying anammox to municipal wastewater treatment promises enormous energy and resource savings; however, seasonally cold conditions pose a considerable challenge, impeding its future applications towards non-tropical regions. In this study, we establish pilot-scale plant (50 m3/d) in northern China implement the partial denitrification coupling process on actual wastewater. Despite seasonal cooling, nitrogen removal efficiency remains high, ranging from 75.0 ± 4.6% at 27.8–20.0 °C 70.4 4.5% 10–7.5 °C. This exhibits remarkable low-temperature tolerance, achieving an in-situ rate of 32.7 4.7 g-N/(m3·d) contributing up 39.7 6.7% removal. Further 15N stable isotope tracing kinetic tests reveal that is capable supplying increasingly abundant NO2- with decreasing temperature, enabling robust mainstream against cooling. From 27.8 7.5 °C, bacteria not only survive but thrive under conditions, absolute relative abundances increasing by 429.1% 343.5%, respectively. study sheds fresh light extending regions, taking necessary step forward toward sustainability goals sector. Low temperatures challenges applying sustainable technology Here, authors propose conduct evaluation, offering insights into colder locations.

Язык: Английский