Fast start-up of partial nitritation as pre-treatment for anammox in membrane bioreactor

Anaerobic ammonium oxidation (anammox) is an innovative pathway for biological nitrogen removal. The raw nitrogenous wastewater is ill-suited for direct depletion by anammox due to lack of sufficient nitrite. Partial nitritation (PN) was operated in a membrane bioreactor (MBR) to generate suitable feed for anammox, and functional microbes were analysed by 16S rRNA sequence analysis. The dissolved oxygen was adopted as the key selection factor to...