Exploiting extracellular polymeric substances (EPS) controlling strategies for performance enhancement of biological wastewater treatments: An overview

Shi, Yahui; Huang, Jinhui; Zeng, Guangming; Gu, Yanling; Chen, Yaoning; Hu, Yi; Tang, Bi; Zhou, Jianxin; Yang, Ying; Shi, Lixiu

doi:10.1016/j.chemosphere.2017.04.042

Cited by 410 publications

(105 citation statements)

References 234 publications

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“…Physical-chemical methods such as coagulation [4], electrocoagulation and adsorption on activated carbon [5] are not destructive but only transfer dye from one phase to another. These processes and biological method [6] were studied for the treatment of waste water but still found to be ineffective.…”

Section: Introductionmentioning

confidence: 99%

Ca-hydroxyzincate: Synthesis and Enhanced Photocatalytic Activity for the Degradation of Methylene Blue Under UV-Light Irradiation

et al. 2019

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This paper involves the investigation of the calcined Ca-hydroxyzincate dehydrate (CHZ) as solid base catalysts for photocatalytic degradation of methylene blue. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TG-DTA), and UV-Vis spectroscopy were carried out to characterize and evaluate the as-prepared samples. The calcined catalysts performances were promising compared to non-calcined material. All the photocatalysts prepared under different processing temperatures (200, 400 and 600 °C) displayed 100% methylene blue degradation compared to the non-calcined sample with 100% dye removal.

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Section: Introductionmentioning

confidence: 99%

Ca-hydroxyzincate: Synthesis and Enhanced Photocatalytic Activity for the Degradation of Methylene Blue Under UV-Light Irradiation

et al. 2019

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“…Extracellular polymer substances (EPS) is a natural polymer substance secreted by microorganisms and mainly composed of protein, polysaccharide, humus and DNA, distributing in the interior and surface of the sludge (Sheng et al, 2010). The reviewed literature found that EPS has an important influence on the sedimentation, dewatering, and flocculation of sludge, but due to the complexity of EPS and the lack of basic knowledge, its impact on the biochemical performance of the sludge remains to be further explored (Shi et al, 2017). Recently, Xiao et al (2017) reported that EPS can store electrochemically active substances such as c-Cyts, humus and tightly-bound EPS, which stimulated DIET between fermenting bacteria and methanogens.…”

Section: Introductionmentioning

confidence: 99%

Use of extracellular polymer substances as additives for improving biogas yield and digestion performance

Guo

et al. 2019

Preprint

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To understand how extracellular polymer substances (EPS) as additives promotes methanogenesis, 9 batch tests of methane production potential in anaerobic reactors with the addition of EPS or not were conducted. 10Research showed that EPS increased remarkably methane production during anaerobic digestion 11 (36.5% increase compared with the control). EPS enriched functional microorganisms such as Firmicutes, 12Actinobacteria, Synergistetes, and Chloroflexi. Among them, 8.86% OTUs from the important hydrolysis and 13 acidification phyla, which may be an important reason for the enhanced methanogenic capacity of anaerobic 14 granular sludge. Additionally, EPS also improved the abundance of cytochrome c (c-Cyts), accelerating the 15 direct interspecies electron transfer (DIET) between syntrophic bacteria and methanogens, thus enhancing the 16 methane production. Interestingly, the average particle size, volatile suspended solids/total suspended solids 17 (VSS/TSS) and EPS content of anaerobic granular sludge (AnGS) in the EPS reactor were approximately equal 18 to that of the control reactor during the anaerobic digestion, illustrating that EPS could not affect the 19 physicochemical properties of AnGS. Therefore, these results suggested that EPS mainly played a role in the 20 form of conductive materials in the anaerobic digestion process. Compared with conductive materials, EPS as 21 biomass conductive materials was not only environmentally friendly and economical but also no secondary 22 pollution. 23 materials 25 26 Importance 27Compared with the reported conductive materials, EPS has the potential of biodegradation, electron transfer 28 and no significant secondary pollution. Besides, there are few studies on the utilization of EPS resources, 29 especially the effect of EPS as an additive on anaerobic digestion performance. To clarify whether EPS as 30 conductive materials or carbon source promotes methanogenesis. Therefore, in this study, we investigated the 31 influence of EPS as an additive on the methanogenic capacity, physical-chemical properties, microbial 32 community structure and metabolic function of anaerobic granular sludge (AnGS), and preliminarily expatiate 33 the influence mechanism of EPS as an additive on methanogenesis. At the meantime, the research is expected to 34 provide new solutions for the improvement of anaerobic digestion performance and disposal of waste mud. 35 36 43 1 *Corresponding authors. Tel.: +86 18648908256; fax: +86 18648908256.

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“…20,21 Quorum sensing (QS) is known as a bacterial behavior, which is density-dependent cell-to-cell communication using signal molecules produced and recognized by microorganism when their signal molecules reached threshold. 22,23 QS could regulate gene expression so as to mediate some bacterial behaviors such as the production of soluble microbial products (SMP) and extracellular polymeric substances (EPS), and biofilm formation. [24][25][26] Thus, several research groups began to investigate application of quorum quenching (QQ) in antifouling of membrane filtration.…”

Section: Introductionmentioning

confidence: 99%

Quorum quenching activity of indigenous quorum quenching bacteria and its potential application in mitigation of membrane biofouling

Huang

Zeng

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Quorum sensing (QS) could regulate gene expression so as to mediate some bacterial behaviors such as the production of extracellular polymeric substances (EPS) and biofilm formation. In this study, a quorum quenching (QQ) bacterium was isolated from an indigenous lab‐scale membrane bioreactor (MBR) and encapsulated in a dumpling‐shaped microbial bag for biofouling control. RESULTS This QQ bacteria has a higher genetic homology with Acinetobacter bereziniae strain. The effect of time and temperature on the QQ activity of the microbial bag was tested by degrading N‐acyl homoserine lactone (AHL). The results showed the degradation of C8‐HSL (N‐Octanoyl‐DL‐homoserine lactone) and C6‐HSL (N‐Hexanoyl‐L‐homoserine lactone) could reach equilibrium within 2 h. In addition, a suitable temperature for AHL degradation was 20 °C, at which the rate of degradation of C6‐HSL and C8‐HSL by the microbial bag was 88% and 69%, respectively. The antifouling efficiency of the microbial bag was investigated by a constant pressure filtration system. With the microbial bag added, the decrease of permeability was obviously improved. After 14 days, the permeability with QQ decreased to 18% while the control experiment exhibited almost no permeability. CONCLUSION The excellent AHL degradation rate and the filtration test showed that this QQ bacteria has an excellent antifouling potential in membrane filtration systems. © 2017 Society of Chemical Industry

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Exploiting extracellular polymeric substances (EPS) controlling strategies for performance enhancement of biological wastewater treatments: An overview

Cited by 410 publications

References 234 publications

Ca-hydroxyzincate: Synthesis and Enhanced Photocatalytic Activity for the Degradation of Methylene Blue Under UV-Light Irradiation

Ca-hydroxyzincate: Synthesis and Enhanced Photocatalytic Activity for the Degradation of Methylene Blue Under UV-Light Irradiation

Use of extracellular polymer substances as additives for improving biogas yield and digestion performance

Quorum quenching activity of indigenous quorum quenching bacteria and its potential application in mitigation of membrane biofouling

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