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

2018 ◽  
Vol 255 ◽  
pp. 198-204 ◽  
Author(s):  
Qi Zhang ◽  
Chunrong Wang ◽  
Longxin Jiang ◽  
Ji Qi ◽  
Jianbing Wang ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Microbial Community Structure ◽  
Biological Aerated Filter ◽  
Aerated Filter

scholarly journals Effect of Aeration Rates and Filter Media Heights on the Performance of Pollutant Removal in an Up-Flow Biological Aerated Filter

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1244 ◽  
Author(s):  
Jiehui Ren ◽  
Wen Cheng ◽  
Tian Wan ◽  
Min Wang ◽  
Chengcheng Zhang
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Relative Abundance ◽  
Microbial Community Structure ◽  
Municipal Wastewater ◽  
Biological Aerated Filter ◽  
Filter Media ◽  
N Removal ◽  
Pollutants Removal ◽  
Aerated Filter

The biological aerated filter (BAF) is an effective biological treatment technology which removes the pollutants in municipal wastewater secondary treatment. However, we still know little about the interaction between the pollutants removal and microbes within the BAF. In this study, we used an up-flow BAF (UBAF) reactor to investigate the relationships between the pollutants removal and microbial community structure at different aeration rates and filter media heights. The microbial community of biofilm was analyzed by Illumina pyrosequencing. Our results showed that the UBAF achieved a better removal efficiency of chemical oxygen demand (COD), NH4+-N, NO3−-N, and total phosphorus (TP) at an aeration rate of 65 L/h. In addition, the COD and NH4+-N removal mainly occurred at 0–25 cm height of filter media. The microbial community structure in the UBAF demonstrated that the relative abundance of the Planctomycetes and Comamonadaceae at 10 cm height of filter media were 11% and 48.1%, respectively, proportions significantly higher than those under others treatments. Finally, the changes in relative abundance of Proteobacteria, Planctomycetes, and Nitrospirae likely explained the mechanism of nitrogen and phosphorus removal. Our results showed that suitable conditions could enhance the microbial community structure to achieve a high pollutants removal in the UBAF.

scholarly journals Performance and Microbial Community Structure of Anaerobic Membrane Bioreactor for Lipids-Rich Kitchen Waste Slurry Treatment: Mesophilic and Thermophilic Processes

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 879 ◽  
Author(s):  
Xiaolan Xiao ◽  
Wansheng Shi ◽  
Wenquan Ruan
Keyword(s):  
Fatty Acids ◽  
Community Structure ◽  
Microbial Community ◽  
Removal Efficiency ◽  
Microbial Community Structure ◽  
Membrane Bioreactor ◽  
Cod Removal ◽  
Kitchen Waste ◽  
Anaerobic Membrane Bioreactor ◽  
Increasing Temperature

The performance and microbial community structure for treating lipids-rich kitchen waste slurry in mesophilic Anaerobic Membrane Bioreactor (m-AnMBR) and thermophilic AnMBR (t-AnMBR) were compared in this study. Higher Organic Loading Rate (OLR) of 12 kg-COD/(m3·d), better Chemical Oxygen Demand (COD) removal efficiency over 98%, stronger stability with Volatile Fatty Acids (VFAs)/alkalinity below 0.04, higher flux with 18 L/(m2·h) and lower Long Chain Fatty Acids (LCFAs) concentration of 550 mg/L were obtained in the m-AnMBR. Directly increasing temperature from 39 to 55 °C resulted in a collapse of the t-AnMBR. Acclimation via gradually increasing temperature made the t-AnMBR run successfully with lower OLR and COD removal efficiency of 7.5 kg-COD/(m3·d) and 96%. An obvious discrepancy of microbial community structure was presented between the m-AnMBR and t-AnMBR via the 16S rRNA gene sequence analysis. The Methanomethylovorans and Methanoculleus were dominant in the t-AnMBR instead of Methanobacterium and Methanothrix in the m-AnMBR.

scholarly journals FLUENT Simulation Design and Optimization of Biological Aerated Filter

2022 ◽  
Vol 2148 (1) ◽  
pp. 012037
Author(s):  
Shuqin Wang ◽  
Zhiqiang Zhang ◽  
Ning Wang ◽  
Wenqi Zhao ◽  
Chungang Yuan
Keyword(s):  
Particle Size ◽  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Ammonia Nitrogen ◽  
Design Parameters ◽  
Biological Aerated Filter ◽  
Simulation Design ◽  
Initial Concentration ◽  
Design And Optimization ◽  
Aerated Filter

Abstract In this paper, a small biological aerated filter for experimental use was designed, and a method was explored to optimize the nitrogen removal efficiency by using FLUENT software to simulate the particle size of the filler, the amount of the filler, the initial concentration of ammonia nitrogen, dissolved oxygen and other operating parameters. Through the simulation experiment, the optimal design parameters of the particle size of filler, the amount of filler, the initial concentration of ammonia nitrogen and the dissolved oxygen of the biological aerated filter are 4mm, 60%, 15% and 1.5%, respectively, when the removal efficiency of ammonia nitrogen exceeds 30% reported in the literature. It provides a reference for the experimental research and practical application of biological aerated filter (BAF) denitrification.

scholarly journals Nitrogen-removal efficiency in an upflow partially packed biological aerated filter (BAF) without backwashing process

2011 ◽  
Vol 1 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Pramanik Biplob ◽  
Suja Fatihah ◽  
Zain Shahrom ◽  
ElShafie Ahmed
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Nitrogen Loading ◽  
Biological Aerated Filter ◽  
Biological Phenomena ◽  
Nitrification Process ◽  
Aerated Filter

An upflow, partially packed biological aerated filter (BAF) reactor was used to remove nitrogen in the form of ammonia ions by a nitrification process that involves physical, chemical and biological phenomena governed by a variety of parameters such as dissolved oxygen concentration, pH and alkalinity. Dissolved oxygen (DO) and pH were shown to have effects on the nitrification process in this study. Three C:N ratios i.e., 10, 4 and 1 were compared during this study by varying the nitrogen loading while the carbon loading was kept constant at 0.405 ± 0.015 kg chemical oxygen demand m−3 d−1. The removal efficiencies of ammonia linearly increase with a rise of the initial concentration of ammonia-nitrogen. The results of the 115 days' operation of the BAF system showed that its overall NH3-N performance was good, where a removal efficiency of 87.0 ± 2.9%, 89.2 ± 1.38% and 91.1 ± 0.7% and COD removal of 87.6 ± 2.9%, 86.4 ± 2.1% and 89.5 ± 2.6% were achieved for the C:N ratios of 10, 4 and 1, respectively on average, over 6 h hydraulic retention time (HRT). No clogging occurred throughout the period although backwashing was eliminated. It was concluded that the BAF system proposed in this study removed nitrogen by the nitrification process extremely well.

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