Impact of dissolved oxygen on the microbial community structure of an intermittent biological aerated filter (IBAF) and the removal efficiency of gasification wastewater

Zhang, Qi; Wang, Chunrong; Jiang, Longxin; Qi, Ji; Wang, Jianbing; He, Xuwen

doi:10.1016/j.biortech.2018.01.115

Cited by 35 publications

(9 citation statements)

References 35 publications

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“…When the gas to water ratio is 2:1, the average removal rates of COD Mn and ammonia nitrogen are optimal under the conditions of a hydraulic load of 4 m/h. COD Mn and NH 4 + -N are effectively removed in respective advantageous treatment environments because of changes in DO concentration [17,18]. Currently, the DO concentration in the system is high, which is beneficial to the growth and reproduction of heterotrophic bacteria and nitrifying bacteria, and improves the degradation rate of COD Mn and NH 4 + -N. In addition, when the hydraulic load conditions are not changed, that is, the organic matter concentration and the hydraulic retention time are substantially unchanged, increasing the gas to water ratio can increase the turbulent conditions of the water flow, improve the mass transfer conditions of the filter material, and strengthen the biochemical reaction, further reducing the concentration of the pollutants [8].…”

Section: Characteristics Of Asmentioning

confidence: 99%

Attapulgite suspension filter material for biological aerated filter to remove CODMn and ammonia nitrogen in micro-polluted drinking water source

Xu¹,

Wang²,

Li³

et al. 2020

Environ. Protect. Eng.

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An attapulgite suspended (AS) filter material was successfully prepared and used in combination with biological aerated filter (BAF) to pretreat excess organic matter and ammonia nitrogen in micropolluted water. The AS filter material was of low density and floated on the water surface, which is beneficial to optimize the hydraulic conditions. Through scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) It was found that the surface of the filter material was uneven, the pores were deep. When the hydraulic load is 4 m/h and the gas to water volume ratio is 2:1, the removal rates of permanganate index (CODMn) and ammonia nitrogen by ASBAF are up to 57.49 and 88.11%, respectively, and the effluent quality meets relevant standards. After backwashing, the pollutants removal rate will return to stable filtration after two hours. A short-term shutdown of the reactor has little effect on the processing performance of ASBAF, but a long-term shutdown will greatly affect the removal rate of CODMn. The complete organic matter degradation model can well fit the experimental effluent water quality.

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Section: Characteristics Of Asmentioning

confidence: 99%

Attapulgite suspension filter material for biological aerated filter to remove CODMn and ammonia nitrogen in micro-polluted drinking water source

Xu¹,

Wang²,

Li³

et al. 2020

Environ. Protect. Eng.

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“…The biological aerated filter (BAF), as a form of the biological contract oxidation technology, has been applied widely for various wastewater treatment processes including domestic sewage, landfill leachate, and industrial wastewater because of the high treatment efficiency and the low economic cost. [11][12][13] According to previous researches, COD and ammonia nitrogen of wastewater could be removed by conventional BAF simultaneously. 14,15 Compared with the classical activated sludge, BAF possess the advantages of high biomass retention, tolerance to toxicity, excellent removal efficiency, and slurry separation.…”

Section: Introductionmentioning

confidence: 99%

Enhanced nitrogen removal of aquaculture wastewater in the combined biological aerated filter: the effect of GAC location setting

Zhou

Wang

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Biological aerated filter (BAF) is an efficient and economical treatment process to cope with the rapid increasing drainage of aquaculture wastewater. Here, GAC and ceramic, which have the combination advantage, was used as filters of BAF system to treat the aquaculture wastewater. The effect of filters in different sequences was also compared. The BAF with GAC at the bottom is named as GAC‐down BAF, and the BAF at the top is named as GAC‐upper BAF. RESULTS Results showed that the removal efficiency of total nitrogen (TN) in GAC‐down BAF was 54.2 ± 1.2% higher than that in GAC‐upper BAF, when the HRT was 3 h and the gas‐water ratio was 5:1. Additionally, it had better phosphorus and COD removal performance in the GAC‐down BAF than those in the GAC‐upper BAF. Microbial community analysis of biofilm attached to different filter layers indicated that the abundances of functional microorganisms like Zoogloea spp., Acinetobacter spp., Pseudomonas spp., Nitrospira spp. on GAC of the GAC‐down BAF were higher than those attached to ceramsite at the same site of GAC‐up BAF. CONCLUSION It was demonstrated that GAC could provide a suitable niche for the growth of functional microbes at the up‐flow BAF system, and plays a key role in pollutant removals from aquaculture wastewater. © 2022 Society of Chemical Industry.

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“…Bio lter media (Zhang et al 2015), reactor (Lu et al 2015), in uent quality (Xu et al 2011), ltration velocity (Ma et al 2016) and other factors (Liao et al 2019;Hu et al 2020b) all had important effects on the generation and utilization of DON in the biological treatment process, among them, gas-water ratio strongly in uenced the community structure of dominant microorganisms directly due to the oxygen concentration uctuation and oxygen mass transfer (Zhang et al 2018;Li et al 2019a). An appropriate gas-water ratio could slow down clogging, promote mass transfer, and improve microbial activity while scouring the aging bio lm (Zhang et al 2018). Some published reports made clear that an appropriate gas-water ratio was existed in terms of nitrogen removal (Yue et al 2018), manganese removal (Hasan et al 2013), and N 2 O emissions (Yang et al 2020) in the BAF process.…”

Section: Introductionmentioning

confidence: 99%

Spectral characterization of the effect of gas–water ratio on dissolved organic nitrogen variation along a drinking water biological aerated filter

Kang

Song

Liu

et al. 2021

Environ Sci Pollut Res

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In order to improve our understanding of dissolved organic nitrogen (DON) variation characteristics in the biological aerated lter (BAF) for drinking water treatment, this study focused on gas-water ratio, a controlling factor of BAF operation, to study spectral characteristics of DON under different gas-water ratio conditions (0, 0.5:1, 2:1 and 10:1). The variations of dissolved organic carbon (DOC) and DON concentrations showed that DOC removal e ciency was consistent with DON concentration, both of which increased with the increase of gas-water ratio, but the increase gradually reduced and was certain limited. Three-dimensional excitation-emission matrix (3D-EEM) spectroscopy combined with parallel factor (PARAFAC) model and uorescence regional integration (FRI) technique were applied to analyze the effect of gas-water ratio on spectral characteristics of DON, PARAFAC analysis results identi ed the main component of DON were tryptophan and protein related substances. The resistances of various uorescent substances in the FRI technique under the in uence of gas-water ratio were shown as: protein substances > humic acid and fulvic acid substances ≈ SMPs-like substances. Correlation analysis showed that the variation of FIS from PARAFAC model was consistent with corresponding normalized integration volume in FRI analysis under different gas-water ratios.

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Impact of dissolved oxygen on the microbial community structure of an intermittent biological aerated filter (IBAF) and the removal efficiency of gasification wastewater

Cited by 35 publications

References 35 publications

Attapulgite suspension filter material for biological aerated filter to remove CODMn and ammonia nitrogen in micro-polluted drinking water source

Attapulgite suspension filter material for biological aerated filter to remove CODMn and ammonia nitrogen in micro-polluted drinking water source

Enhanced nitrogen removal of aquaculture wastewater in the combined biological aerated filter: the effect of GAC location setting

Spectral characterization of the effect of gas–water ratio on dissolved organic nitrogen variation along a drinking water biological aerated filter

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