Optimizing nitrogen removal with an immobilized biological filler system: realizing stage-independent operational process.

ABSTRACT: Due to the operation mode of traditional activated sludge systems, it is difficult for various functional bacteria to exert their respective advantages. In this study, immobilized fillers for hydrolytic acidification, nitrification, and denitrification were developed to allow independent operation at each stage, enhancing nitrogen removal performance of overall process. The results showed that ammonia nitrogen and total nitrogen levels in the effluent stabilized at 0.75-0.83 and 1.5-2 mg/L, respectively, when the total hydraulic retention time (HRT) of the system was 6.4 h and the nitrification unit HRT was 3 h. These values represented significant improvements compared with the traditional activated sludge process. Unit performance tests revealed that reducing the hydrolytic-acidification

SUBMITTER: Liu X 

PROVIDER: S-EPMC11882092 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature