Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes

National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing 100124, China

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Academic Editors: Shan Huang and Xi Chen

Water 2021, 13(24), 3590; https://doi.org/10.3390/w13243590

Received: 30 September 2021 / Revised: 3 December 2021 / Accepted: 11 December 2021 / Published: 14 December 2021

(This article belongs to the Special Issue Nitrogen Removal in Wastewater Treatment Process: New Insight and Future)

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Abstract

The start-up of the aerobic granular sludge (AGS) process under low temperature is challenging. In this study, the sequencing batch reactor (SBR) was fed with synthetic wastewater and the temperature was controlled at 15 ℃. The main components in the synthetic wastewater were sodium acetate and ammonium chloride. The influent chemical oxygen demand (COD) and NH₄⁺-N concentrations were 300 and 60 mg/L, respectively. The AGS was successfully cultivated in 60 days by gradually shortening the settling time. During the stable operation stage (61–100 d), the average effluent COD, NH₄⁺-N, NO₂⁻-N, and NO₃⁻-N concentrations were 47.2, 1.0, 47.2, and 5.1 mg/L, respectively. Meanwhile, the nitrite accumulation rate (NAR) reached 90.6%. Batch test showed that the smaller AGS had higher NH₄⁺-N removal rate while the larger AGS performed higher NAR. The NH₄⁺-N removal rates of R1 (1.0–2.0 mm), R2 (2.0–3.0 mm), and R3 (>3 mm) granules were 0.85, 0.61, and 0.45 g N/(kg VSS·h), respectively. Meanwhile, the NAR of R1, R2, and R3 were 36.2%, 77.2%, and 94.9%, respectively. The obtained results could provide important guidance for the cultivation of AGS in low-temperature wastewater treatment. View Full-Text

Keywords: aerobic granules; low temperature; mainstream wastewater; sludge characteristics; different particle size

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MDPI and ACS Style

Liang, D.; Li, J.; Zheng, Z.; Zhang, J.; Wu, Y.; Li, D.; Li, P.; Zhang, K. Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes. Water 2021, 13, 3590. https://doi.org/10.3390/w13243590

AMA Style

Liang D, Li J, Zheng Z, Zhang J, Wu Y, Li D, Li P, Zhang K. Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes. Water. 2021; 13(24):3590. https://doi.org/10.3390/w13243590

Chicago/Turabian Style

Liang, Dongbo, Jun Li, Zhaoming Zheng, Jing Zhang, Yaodong Wu, Dongyue Li, Peilin Li, and Kai Zhang. 2021. "Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes" Water 13, no. 24: 3590. https://doi.org/10.3390/w13243590

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Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes

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