Effect of influent ammonia nitrogen concentration on the phosphorus removal process in the aerobic granular sludge reactor

Wei, Cheng; Ma, Cong; Bao, Ruiling; Yang, Xiao-Li; Zhou, Xiaofei; Liu, Yan; Liu, Qing; Ruan, Aidong; Li, Xiang

doi:10.1016/j.jece.2023.110476

Cited by 8 publications

(2 citation statements)

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“…This process enhanced the TP removal efficiency in the aerobic zone, marking a "transition" of TP removal from the anoxic zone to the aerobic zone. One study found that DPAOs in wastewater treatment systems can use NOx − -N as an electron acceptor for denitrification-polyphosphate accumulation under anaerobic conditions, while still employing O2 as an electron acceptor for phosphorus removal under aerobic conditions [21]. According to the study's findings, the observed aerobic polyphosphate accumulation might be facilitated by DPAOs utilizing molecular oxygen as the electron acceptor.…”

Section: Removal Patterns Of N and P In The Reaction Systemmentioning

confidence: 94%

“…The seed sludge (day 1) and AGS (day 80) samples were taken from the end of the aerobic section before the hydrocyclone to analyze the microbial community succession during AGS formation. DNA extraction, polymerase chain reaction amplification, and pyrosequencing were conducted sequentially using the general primers 338 F (5′-ACTCC-TACGGGAGGCAGCAG-3′) and 806 R (5′-GGACTACHVGGGTWTCTAAT-3′) for bacterial diversity analysis according to previously established procedures [21].…”

Section: Microbial Community Analysismentioning

confidence: 99%

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Enhanced Simultaneous Nitrogen and Phosphorus Removal in a Continuous-Flow Granular Sludge System under Gradient-Controlled Hydraulic Loading

Zhao,

An,

Wan

et al. 2024

Water

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The feasibility of the aerobic granulation of activated sludge was investigated in a continuous-flow anaerobic–anoxic–oxic system under gradient-controlled hydraulic loading on the surface of a cyclone separator. Concentrated domestic sewage was used. After 80 days of operation, 80% of activated sludge in the system was in the form of granular sludge with an average particle size of 373 μm. High removal efficiency was achieved for chemical oxygen demand (94.40%), NH4+-N (99.93%), total nitrogen (89.44%), and total phosphorus (96.92%). A batch study revealed that Pseudomonas (1.34%) and Dechloromonas (1.05%) as the main denitrifying phosphorus-accumulating organisms could efficiently remove phosphorus using nitrate as an electron acceptor, which improved the utilization efficiency of carbon sources and achieved simultaneous denitrification and phosphorus removal. Overall, the study demonstrates the feasibility of enhanced denitrification and phosphorus removal in a continuous-flow granular sludge system. The sludge system enables simultaneous nitrogen and phosphorus removal under low carbon-to-nitrogen ratios.

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Section: Removal Patterns Of N and P In The Reaction Systemmentioning

confidence: 94%

Section: Microbial Community Analysismentioning

confidence: 99%