Impact of static biocarriers on the microbial community, nitrogen removal and membrane fouling in submerged membrane bioreactor at different COD:N ratios

Wang, K.M.; Jiang, S.F.; Zhang, Z.H.; Ye, Qianlin; Zhang, Y.C.; Zhou, Jiaheng; Hong, Qiankun; Yu, Jianming; Wang, H.Y.

doi:10.1016/j.biortech.2020.122798

Cited by 29 publications

(8 citation statements)

References 44 publications

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“…One of them was anaerobic ammonia oxidizing bacteria (Anammox), which could maintain nitrate-dependent oxidation of Fe(II). In addition, studies have indicated that the increase of Fe(II) had a certain promoting effect on Anammox bacteria ( Wang et al, 2020b ).…”

Section: Resultsmentioning

confidence: 99%

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Liu

Gao

2021

Bioresource Technology

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Section: Resultsmentioning

confidence: 99%

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Liu

Gao

2021

Bioresource Technology

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“…However, biochar addition to BMBR provided a significant improvement, which is sufficient to meet the First-class Level B requirement (20 mg/L TN) in China (GB18918-2002). The improved performance of BMBR can be attributed to the biochar addition with porous structure ( Figure S1 in Supplementary Materials ) and a high internal surface area of 645.667 m 2 /g [ 30 ] ( Table S2 in Supplementary Materials ), providing adsorption sites for microbes to form coexisting aerobic and anoxic microenvironment, and facilitate nitrogen-related metabolism [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

“…The sample preparation procedures of soluble microbial product (SMP) and extracellular polymeric substances (EPS) concentration can be referred to in our previous study [ 25 ]. All the supernatant samples were passed through 0.45 μm filters (Jinteng, Tianjin, China) prior to analyses.…”

Section: Methodsmentioning

confidence: 99%

Biochar Addition in Membrane Bioreactor Enables Membrane Fouling Alleviation and Nitrogen Removal Improvement for Low C/N Municipal Wastewater Treatment

Wang

Shen

et al. 2023

Membranes

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Membrane bioreactors (MBRs) are frequently used to treat municipal wastewater, but membrane fouling is still the main weakness of this technology. Additionally, the low carbon-nitrogen (C/N) ratio influent has been shown to not only increase the membrane fouling, but also introduce challenges to meet the effluent discharge standard for nitrogen removal. Herein, the authors addressed the challenges by adding cost-effective biochar. The results suggested that the biochar addition can enable membrane fouling alleviation and nitrogen removal improvement. The reduced membrane fouling can be ascribed to the biochar adsorption capacity, which facilitates to form bigger flocs with carbon skeleton in biochar as a core. As a result, the biochar addition significantly altered the mixed liquor suspension with soluble microbial product (SMP) concentration reduction of approximately 14%, lower SMP protein/polysaccharide ratio from 0.28 ± 0.02 to 0.22 ± 0.03, smaller SMP molecular weight and bigger sludge particle size from 67.68 ± 6.9 μm to 113.47 ± 4.8 μm. The nitrogen removal is also dramatically improved after biochar addition, which can be due to the initial carbon source release from biochar, and formation of aerobic–anaerobic microstructures. Microbial diversity analysis results suggested more accumulation of denitrification microbes including norank_f__JG30-KF-CM45 and Plasticicumulans. Less relative abundance of Aeromonas after biochar addition suggested less extracellular polymer substance (EPS) secretion and lower membrane fouling rate.

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“…Similarly, Wang et al [ 183 ] evaluated the addition of polyvinyl formal (PVFM) bio-carriers to membrane bioreactors at high and low C/N values of 20.0 and 6.7. The results showed that adding bio-carriers could enrich nitrifying and denitrifying bacteria and slightly increase the total nitrogen removal rate, even at lower C/N values.…”

Section: Nitrogen Recovery Processmentioning

confidence: 99%

A Comprehensive Review on Wastewater Nitrogen Removal and Its Recovery Processes

Zhou

Zhu

et al. 2023

IJERPH

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Discharging large amounts of domestic and industrial wastewater drastically increases the reactive nitrogen content in aquatic ecosystems, which causes severe ecological stress and biodiversity loss. This paper reviews three common types of denitrification processes, including physical, chemical, and biological processes, and mainly focuses on the membrane technology for nitrogen recovery. The applicable conditions and effects of various treatment methods, as well as the advantages, disadvantages, and influencing factors of membrane technologies, are summarized. Finally, it is proposed that developing effective combinations of different treatment methods and researching new processes with high efficiency, economy, and energy savings, such as microbial fuel cells and anaerobic osmotic membrane bioreactors, are the research and development directions of wastewater treatment processes.

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Impact of static biocarriers on the microbial community, nitrogen removal and membrane fouling in submerged membrane bioreactor at different COD:N ratios

Cited by 29 publications

References 44 publications

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Biochar Addition in Membrane Bioreactor Enables Membrane Fouling Alleviation and Nitrogen Removal Improvement for Low C/N Municipal Wastewater Treatment

A Comprehensive Review on Wastewater Nitrogen Removal and Its Recovery Processes

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