Enhanced nitrogen removal in an aerobic granular sequencing batch reactor under low DO concentration: Role of extracellular polymeric substances and microbial community structure

Yan, Lilong; Zhang, Mingyue; Liu, Yue; Cong, Liu; Zhang, Yudan; Liu, Shuang; Yu, Liquan; Hao, Guoxin; Chen, Zhonglin; Zhang, Ying

doi:10.1016/j.biortech.2019.121651

Cited by 34 publications

(14 citation statements)

References 44 publications

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“…In previous alpha diversity discussions, diatomite recorded the highest diversity among all sample. High diversity of bacterial community was one of the factors in uencing the formation of aerobic granules [32]. Thus, in this section, the identi cation of relative abundance for bacteria diversity in the seed sludge, AGS control and AGS diatomite are compared.…”

Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

“…A similar nding was discovered by Guo et al [4] and He et al [7] as the Proteobacteria was the most dominant in their respective bacterial community. Othman [32] explained, the dominancy of Proteobacteria might suggest that it have a signi cant contribution to the granulation process. Proteobacteria have the capability to increases the production of EPS which promotes the adhesion of oc sludge to become granules.…”

Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

“…Dahalan [35] mentioned Bacteroidetes normally discovered in the inner core of the AGS where there was a limited amount of oxygen. Bacteroidetes also could enhance EPS production which increases the cell hydrophobicity of the granules and promote the granulation process [32]. Latterly, various studies discovered Bacteroidetes as a dominant bacterial population found in AGS [22,36,37].…”

Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

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Microbial Community Shift and Role of Bacteria in Rapid Granulation By Using Diatomite

Basri

Anuar

Halim

2022

Preprint

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Aerobic granular sludge (AGS) technology is a promising biological method for modern wastewater treatment. However, granulation time have become a major issue for the application of AGS technology especially in low strength wastewater. Recent studies on granulation are focusing towards rapid start-up granulation process. Diatomite, a friable light-coloured sedimentary rock was introduces in this study to enhanced the granules formation. This study highlight the effect of diatomite towards the microbial community during the transformation of seed sludge until development of granules. DNA extraction and Metagenomic analysis was conducted with three samples (seed sludge, control AGS, AGS diatomite) to compare the microbial community. The microbial community analysis revealed the alpha diversity, phylum and class level, and the abundance of EPS producing bacteria of each bacteria samples respectively. Diatomite has a significant influence towards the microbial diversity (High Shannon index alpha diversity). Also, diatomite promotes the abundance of functional bacteria especially EPS producing bacteria, which seen as a crucial elements in granulation process.

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Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

Section: Comparison Of Bacterial Community Between Seed Sludge Ags Control and Ags Diatomite Samplesmentioning

confidence: 99%

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Microbial Community Shift and Role of Bacteria in Rapid Granulation By Using Diatomite

Basri

Anuar

Halim

2022

Preprint

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“…These results are highly similar to the microbial communities cultivated with NaAc. [35][36][37] The four dominant bacteria with relative abundances greater than 1% in R1 were Gammaproteobacteria (75.34%), Alphaproteobacteria (14.57%), Bacteroidia (4.73%), and Clostridia (3.51%). Cotreatment with landll leachate increased the relative abundance of Gammaproteobacteria and Clostridia at the class level, while the abundance of Alphaproteobacteria and Bacteroidia was reduced.…”

Section: Molecular Biological Analysismentioning

confidence: 99%

The cotreatment of landfill leachate and high-nitrate wastewater using SBRs: evaluation of denitrification performance and microbial analysis

et al. 2019

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“…So, it is of great importance to find more sustainable and cost-effective ways that the by-product can be resource-based. The algal, as a low cost in-situ oxidant, have been used in the bacterial oxidation of activated sludge [1,2], at the same time, abating the organic nutrients (nitrogen and phosphorous) and contamination sources via photosynthesis during wastewater treatment [3][4][5]. A large number of studies have shown that the excess sludge from algal-bacteria consortia system is considered as a potential source of biodiesel or fertilizer production [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of illumination time on biological community of algal-bacterial granules and lipid content

Huang

Sun

et al. 2021

Environmental Engineering Research

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Synthetic wastewater was used to culture granular sludge for 21 weeks at three sequencing batch reactor activated sludge process (SBR) under different photoperiods. The growth of algae changed granular oxygen distribution, which affected the composition of microbial communities. Different photoperiods were able to alter the formation of granular sludge and the microbial community granules. In short photoperiod (12 h/d) sludge could generate symbiotic algae-bacteria granules in the SBR. By contrast, the long photoperiod (24 h/d) promotes the growth of algae and Ascomycota early, and then inhibits algae, especially chlorophyta (only 1.18%). In the end, algae-bacteria-fungi granules were formed in long photoperiod (LP). By GC-MS and model calculation, the lipid content of algae-bacteria granules was 33.71% more than that of pure aerobic granular sludge. However, the proportion of unsaturated fatty acids in algae-bacteria granules was as high as 43%, resulting in the quality of biodiesel prepared from algae-bacteria granule being slightly worse than that prepared from pure aerobic granular sludge. But both of them were better than biodiesel prepared from pure algae. The biodiesel content of algae-bacteria granule in short photoperiod (SP) and LP were 68.79 and 70.66 mg/g, respectively, which was better than that of pure aerobic particles (52.30 mg/g). Therefore, the formation of algae-bacteria granules is an effective way to remove nutrients and reduce harvesting costs.

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Enhanced nitrogen removal in an aerobic granular sequencing batch reactor under low DO concentration: Role of extracellular polymeric substances and microbial community structure

Cited by 34 publications

References 44 publications

Microbial Community Shift and Role of Bacteria in Rapid Granulation By Using Diatomite

Microbial Community Shift and Role of Bacteria in Rapid Granulation By Using Diatomite

The cotreatment of landfill leachate and high-nitrate wastewater using SBRs: evaluation of denitrification performance and microbial analysis

Effects of illumination time on biological community of algal-bacterial granules and lipid content

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