YUCheng,ZHANGKai-yuan,WANGKai-jun,et al.Continuous Flow Aerobic Granular Sludge Process Upgrading a Full-scale Urban Wastewater Treatment Plant[J].China Water & Wastewater,2023,39(13):1-8.
Continuous Flow Aerobic Granular Sludge Process Upgrading a Full-scale Urban Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第13期
Page:
1-8
Column:
Date of publication:
2023-07-01
- Abstract:
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Aerobic granular sludge (AGS) technology is considered as a good alternative of conventional activated sludge process, and has been scaled-up in sequencing batch reactors. However, the continuous flow AGS is still a challenge. Here, a novel configuration of micro-aerobic/aerobic reactor with an internal three-phase separator was applied in a low-strength urban wastewater treatment plant (WWTP). Pollutants removal performance and granulation potential were analyzed. After a start-up period of approximately one month, granulation appeared and AGS was maintained thereafter. The average diameter was 138.5 μm and AGS of greater than 200 μm accounted for 28.9% of granules. The average effluent COD, NH4+-N and TN concentrations were 25.5 mg/L, 0.5 mg/L and 10.1 mg/L，respectively, and effluent requirements were easily met. Furthermore, start-up time, granulation, pollutants removal performance, footprint, and energy consumption were compared between the developed configuration, conventional activated sludge system and the existing AGS technologies of Nereda
and S::Select. Compared to conventional activated sludge system, the developed system showed great potential for better effluent quality and minimized footprint. Meanwhile, compared to existing AGS technologies, the developed system could directly upgrade the existing continuous flow WWTP.
Last Update:
2023-07-01