ZHANGYu-jian,YANGYi-chen,MABin,et al.Cultivation of Nitrifying Granular Sludge in Low-carbon Municipal Wastewater Nitrogen Removal Process[J].China Water & Wastewater,2023,39(7):17-22.
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Cultivation of Nitrifying Granular Sludge in Low-carbon Municipal Wastewater Nitrogen Removal Process

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第7期 Page: 17-22 Column: Date of publication: 2023-04-01
Author(s):
ZHANG　Yu-jian1;  YANG　Yi-chen1;  MA　Bin1;  WEI　Yan2
（1. Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province， Hainan University， Haikou 570228， China； 2. State Key Laboratory of Marine Resource Utilization in South China Sea， Hainan University， Haikou 570228， China）
Keywords:
low-carbon municipal wastewater;  partial denitrification;  Anammox;  nitrifying granular sludge
Abstract:
To achieve efficient and advanced nitrogen removal of low-carbon municipal wastewater, this paper established a process consisting of partial denitrification/Anammox and nitrifying granular sludge (PDA-N), and investigated the cultivation of nitrifying granular sludge. The up-flow sludge bed (USB) reactor was run in sequential batch mode and the settling time was gradually shortened. Nitrifying granular sludge was thus successfully cultivated, and 90.52% of the nitrifying granular sludge had a particle size greater than 0.5 mm. The settling velocity of granular sludge increased with the increase of particle size, and the average settling velocity of particles with particle size of 0.5-0.9 mm was 15.66 m/h. After the formation of granular sludge, the volumetric removal rate of ammonia nitrogen in the USB reached 1.31 g/(L·d). The PDA-N process had high nitrogen removal efficiency and low demand for organic carbon sources, which was suitable for advanced nitrogen removal of low-carbon municipal wastewater.
Last Update: 2023-04-01