The regulation of N-acyl-homoserine lactones (AHLs)-based quorum sensing on EPS secretion via ATP synthetic for the stability of aerobic granular sludge

Zhang, Zhiming; Cao, Runjuan; Jin, Lihua; Zhu, Weitang; Ji, Yatong; Xu, Xiangyang; Zhu, Liang

doi:10.1016/j.scitotenv.2019.04.052

Cited by 116 publications

(35 citation statements)

References 47 publications

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“…These made the AGS technique made to be widely used in treatments of high-load industrial wastewater as well as sewage [9][10][11][12]. The stability of AGS is the most important issue in applying AGS-based process in various fields and is related many factors including the composition of influent wastewater, carbon to nitrogen (C/N) ratio, food to microorganisms (F/M) ratio, composition of extracellular polymeric substances (EPS), and rate and temperature of aeration [4,8,[13][14][15][16][17], among which, the C/N ratio of influent water is one of the most important factors for the growth of microorganism and biodegradation of nutrient salt [13,[18][19][20]. The application of AGS system, for example, into the treatment of wastewater treatment where the variance in wastewater is high was reported to be an important factor in decreased stability, degradation of granule and the growth of filamentous fungus [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Kim

Ahn

2020

Environmental Engineering Research

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The purpose of this study was to assess the nutrient salts removal efficiency and stability of the aerobic granular sludge (AGS) by change in C/N (carbon to nitrogen) ratio. The laboratory-scale experiments were performed to analyze the removal efficiencies for organic matter and contents of nitrogen, MLSS, sludge volume index, and extracellular polymeric substances (EPS) under C/N ratio conditions of 5.0, 10.0, 15.0, and 20.0. The microorganisms were observed using optical microscope and the microbial communities were analyzed using pyrosequencing. The increase in C/N ratio from 5.0 to 20.0 increased the organic matter and nitrogen removal efficiency to 95.9 and 79.1%, respectively. For the EPS contents, an influencing factor of granule stability, the polysaccharides to protein (PS/PN) ratio increased from 0.55 to 0.79. For the microbial community, the <i>Thauera</i> was the most common genus in ending phase occupying 63.7%. This microorganism is regarded as one contributing to organic matter degradation and improved production of EPS including AGS of microorganism, thus, may be an explanation of the results of this study such as increase in organic material in AGS and improvement of denitrification efficiency and contents of EPS with increase in C/N ratio.

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Section: Introductionmentioning

confidence: 99%

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Kim

Ahn

2020

Environmental Engineering Research

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“…Activated sludge (AS) is a typical aerobic biological treatment method (Zhang, Liu, et al, 2019; Zhang, He, et al, 2019; Zhang, An, et al, 2019; Zhang, Cao, et al, 2019). It mainly uses biological coagulation, adsorption and oxidation of sludge to remove pollutants in water.…”

Section: Biological Treatment Methodsmentioning

confidence: 99%

“…Some properties, including specific surface area, pore structure, and surface functional groups, have significant impacts on the adsorption capacity of CAMs (Xing et al, 2019;Zhang, An, et al, 2019;Zhang, Cao, et al, 2019;Zhao, Yan, et al, 2019;Zhao, Jian, et al, 2019). In this way, many researchers focus on the modification of CAMs to improve their adsorption performance (Rasheed, Adeel, Nabeel, Bilal, & Iqbal, 2019;Zhang, He, et al, 2019;Zhang, An, et al, 2019;Zhang, Cao, et al, 2019). Ai et al (2019) studied the adsorption behavior of three tetracyclines (tetracycline, oxytetracycline, and chlortetracycline) on the reduced graphene oxide (RGO) and graphene oxide (GO).…”

Section: Carbon Adsorptionmentioning

confidence: 99%

“…It was also found that the degradation efficiency of ciprofloxacin in synthetic and real wastewaters by γ-Al 2 O 3 catalytic ozonation was slightly higher than that by ozonation. , Zhang, He, et al (2019), Zhang, An, et al (2019), Zhang, Cao, et al (2019)) studied the catalytic ozonation of benzotriazole (BZA) with LaCoO 3 as catalyst. The results showed that, compared with the ozonation alone, the catalytic ozonation with LaCoO 3 can improve the removal rate of BZA and significantly reduce the formation of trichloromethane, bromochloroacetonitrile, and dichloroacetamide.…”

Section: Ozonementioning

confidence: 99%

“…Emerging pollutants (EPs) refer to a class of pollutants, which are emerging in the environment or recently attracted attention (Zhang, Liu, et al, 2019; Zhang, He, Dong, Zhang, & Huang, 2019; Zhang, An, et al, 2019; Zhang, Cao, et al, 2019). EPs mainly include pharmaceutical and personal care products (PPCPs), endocrine‐disrupting chemicals (EDCs), and antibiotic resistance genes (ARGs).…”

Section: Overviewmentioning

confidence: 99%

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Emerging pollutants—Part II: Treatment

Liu

Zhang

Chang

2020

Water Environment Research

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Emerging pollutants (EPs) refer to a class of pollutants, which are emerging in the environment or recently attracted attention. EPs mainly include pharmaceutical and personal care products (PPCPs), endocrine-disrupting chemicals (EDCs), and antibiotic resistance genes (ARGs). EPs have potential threats to human health and ecological environment. In recent years, the continuous detections of EPs in surface and ground water have brought huge challenges to water treatment and also made the treatment of EPs become an international research hotspot. This paper summarizes some research results on EPs treatment published in 2019. This paper may be helpful to understand the current situations and development trends of EP treatment technologies.

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Quorum sensing unveils the sludge floccule‐assisted stabilization of aerobic granules in granule‐dominated sequencing batch reactors

Tian

et al. 2022

Biotech & Bioengineering

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Floccules are another major form of microbial aggregates in aerobic granular sludge systems. Previous studies mainly attributed the persistence of floccules to their relatively faster nutrient uptake and higher growth rate over aerobic granules; however, they failed to unravel the underlying mechanism of the long-term coexistence of these two aggregates. In this work, the existence and function of the floccules in an aerobic granule-dominated sequencing batch reactor were investigated from the view of quorum sensing (QS) and quorum quenching (QQ).The results showed that though the floccules were closely associated with the granules in terms of similar community structures (including the QS-and QQ-related ones), they exhibited a relatively higher QQ-related activity but a lower QS-related activity. A compatible proportion of floccules might be helpful to maintain the QS-related activity and keep the granules stable. In addition, the structure difference was demonstrated to diversify the QS-and QQ-related activities of the floccules and the aerobic granules. These findings could broaden our understanding of the interactions between the coexistent floccules and granules in aerobic granuledominated systems and would be instructive for the development of the aerobic granular sludge process.

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The regulation of N-acyl-homoserine lactones (AHLs)-based quorum sensing on EPS secretion via ATP synthetic for the stability of aerobic granular sludge

Cited by 116 publications

References 47 publications

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Emerging pollutants—Part II: Treatment

Quorum sensing unveils the sludge floccule‐assisted stabilization of aerobic granules in granule‐dominated sequencing batch reactors

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