Nitrogen removal from low COD/N interflow using a hybrid activated sludge membrane-aerated biofilm reactor (H-MABR)

Liu, Hengyi; Li, Lei; Ye, Wenjie; Ru, Lingyu; Liu, Guotao; Peng, Xiangjun; Wang, Xiaoming

doi:10.1016/j.biortech.2022.127855

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…This approach was selected based on the observation that lower COD concentrations enhanced the accumulation of NO 2 – –N in the EPD process . The limited carbon source availability likely intensified competition among DGAOs, DPAOs, and DNB in C1 and C2 . As a result, the PO 4 3– –P removal efficiency decreased to 78.8 ± 0.9% (Figure S1B), indicating that more COD was utilized by DGAOs for the EPD process.…”

Section: Results and Discussionmentioning

confidence: 99%

“…34 The limited carbon source availability likely intensified competition among DGAOs, DPAOs, and DNB in C1 and C2. 35 As a result, the PO 4 3− −P removal efficiency decreased to 78.8 ± 0.9% (Figure S1B), indicating that more COD was utilized by DGAOs for the EPD process. Due to the enhancement of the EPD process, the concentration of NO C4, the anammox contribution to nitrogen removal increased from 7.9% in phase 1 to 42.5% in phase 2.…”

Section: Nutrient Removal Performance In Mabrmentioning

confidence: 97%

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Synergistic Integration of Anammox and Endogenous Denitrification Processes for the Simultaneous Carbon, Nitrogen, and Phosphorus Removal

Zhen,

Wang,

et al. 2024

Environ. Sci. Technol.

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The feasibility of a synergistic endogenous partial denitrification-phosphorus removal coupled anammox (SEPD-PR/A) system was investigated in a modified anaerobic baffled reactor (mABR) for synchronous carbon, nitrogen, and phosphorus removal. The mABR comprising four identical compartments (i.e., C1–C4) was inoculated with precultured denitrifying glycogen-accumulating organisms (DGAOs), denitrifying polyphosphate-accumulating organisms, and anammox bacteria. After 136 days of operation, the chemical oxygen demand (COD), total nitrogen, and phosphorus removal efficiencies reached 88.6 ± 1.0, 97.2 ± 1.5, and 89.1 ± 4.2%, respectively. Network-based analysis revealed that the biofilmed community demonstrated stable nutrient removal performance under oligotrophic conditions in C4. The metagenome-assembled genomes (MAGs) such as MAG106, MAG127, MAG52, and MAG37 annotated as denitrifying phosphorus-accumulating organisms (DPAOs) and MAG146 as a DGAO were dominated in C1 and C2 and contributed to 89.2% of COD consumption. MAG54 and MAG16 annotated as Candidatus_Brocadia (total relative abundance of 16.5% in C3 and 4.3% in C4) were responsible for 74.4% of the total nitrogen removal through the anammox-mediated pathway. Functional gene analysis based on metagenomic sequencing confirmed that different compartments of the mABR were capable of performing distinct functions with specific advantageous microbial groups, facilitating targeted nutrient removal. Additionally, under oligotrophic conditions, the activity of the anammox bacteria-related genes of hzs was higher compared to that of hdh. Thus, an innovative method for the treatment of low-strength municipal and nitrate-containing wastewaters without aeration was presented, mediated by an anammox process with less land area and excellent quality effluent.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Nutrient Removal Performance In Mabrmentioning

confidence: 97%

Synergistic Integration of Anammox and Endogenous Denitrification Processes for the Simultaneous Carbon, Nitrogen, and Phosphorus Removal

Zhen,

Wang,

et al. 2024

Environ. Sci. Technol.

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“…Biological treatment systems have a well-established history with filtration technology, and there is a growing interest among researchers in using membrane technology for nitrogen removal. In the study by Liu et al [90], membrane technology was integrated with the conventional aerated attached growth method to address low COD/N wastewater, which characterizes landfill leachate. The two-stage bioreactor is composed of an inner cylindrical chamber containing the membrane biofilm and an outer cylindrical chamber containing the packing material in which aeration is supplied.…”

Section: Immobilized Growthmentioning

confidence: 99%

Advances in Nitrogen-Rich Wastewater Treatment: A Comprehensive Review of Modern Technologies

Omar,

Almomani,

Qiblawey

et al. 2024

Sustainability

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Nitrogen-rich wastewater is a major environmental issue that requires proper treatment before disposal. This comprehensive overview covers biological, physical, and chemical nitrogen removal methods. Simultaneous nitrification–denitrification (SND) is most effective in saline water when utilizing both aerobic and anoxic conditions with diverse microbial populations for nitrogen removal. Coupling anammox with denitrification could increase removal rates and reduce energy demand. Suspended growth bioreactors effectively treated diverse COD/N ratios and demonstrated resilience to low C/N ratios. Moving biofilm bioreactors exhibit reduced mortality rates, enhanced sludge–liquid separation, increased treatment efficiency, and stronger biological structures. SND studies show ≥90% total nitrogen removal efficiency (%RETN) in diverse setups, with Defluviicoccus, Nitrosomonas, and Nitrospira as the main microbial communities, while anammox–denitrification achieved a %RETN of 77%. Systems using polyvinyl alcohol/sodium alginate as a growth medium showed a %RETN ≥ 75%. Air-lift reflux configurations exhibited high %RETN and %RENH4, reducing costs and minimizing sludge formation. Microwave pretreatment and high-frequency electric fields could be used to improve the %RENH4. Adsorption/ion exchange, membrane distillation, ultrafiltration, and nanofiltration exhibit promise in industrial wastewater treatment. AOPs and sulfate-based oxidants effectively eliminate nitrogen compounds from industrial wastewater. Tailoring proposed treatments for cost-effective nitrogen removal, optimizing microbial interactions, and analyzing the techno-economics of emerging technologies are crucial.

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Comparison Between Hybrid and Non-hybrid Membrane Aerated Biofilm Reactors in Treating Municipal Wastewater

Qin,

Zhou

2024

Lecture Notes in Civil Engineering

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Nitrogen removal from low COD/N interflow using a hybrid activated sludge membrane-aerated biofilm reactor (H-MABR)

Cited by 14 publications

References 20 publications

Synergistic Integration of Anammox and Endogenous Denitrification Processes for the Simultaneous Carbon, Nitrogen, and Phosphorus Removal

Synergistic Integration of Anammox and Endogenous Denitrification Processes for the Simultaneous Carbon, Nitrogen, and Phosphorus Removal

Advances in Nitrogen-Rich Wastewater Treatment: A Comprehensive Review of Modern Technologies

Comparison Between Hybrid and Non-hybrid Membrane Aerated Biofilm Reactors in Treating Municipal Wastewater

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