A sustainable method for effective regulation of anaerobic granular sludge: Artificially increasing the concentration of signal molecules by cultivating a secreting strain

Ding, Yangcheng; Feng, Huajun; Huang, Wenkun; Shen, Dongsheng; Wang, Meizhen

doi:10.1016/j.biortech.2015.07.066

Cited by 60 publications

(20 citation statements)

References 23 publications

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“…The direct addition of the quorum sensing molecule acyl homoserine lactone (AHL) during granule formation in an UASB reactor resulted in larger granules and better COD removal (Li et al ., ). The addition of granulation promoting (autoinducer‐2 and N ‐butyryl‐homoserine lactone) and depleting (diffusible signal) factors regulated granule formation (Ding et al ., ). In situ production of these signal molecules could be controlled by adjusting operational parameters, such as temperature and pH (Ding et al ., ).…”

Section: Microbial Communication In Admentioning

confidence: 97%

“…While in UASB systems biofilm formation in the form of granules is preferred, in anaerobic membrane bioreactor systems, the formation of a biofilm leading to fouling must be avoided. This can be achieved by both direct (addition of signal molecules) or indirect (addition of microorganisms able to produce signal molecules) addition, as well as stimulation of the production of signal molecules that hinder biofilm formation through the adjustment of operational parameters (Ding et al ., ). Alternatively, degradation or modification of quorum sensing molecules by means of so‐called quorum quenching enzymes may be obtained by direct addition or stimulation of microbial producers (Oh et al ., ; Jiang et al ., ; Kim et al ., ).…”

Section: Microbial Communication In Admentioning

confidence: 97%

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Perspectives for microbial community composition in anaerobic digestion: from abundance and activity to connectivity

Vrieze

Verstraete

2016

Environmental Microbiology

108

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Summary Microbial management in anaerobic digestion is mainly focused on physically present and metabolically active species. Because of its complexity and operation near the thermodynamic equilibria, it is equally important to address functional regulation, based on spatial organisation and interspecies communication. Further establishment of the knowledge on microbial communication in anaerobic digestion through quorum sensing and nanowires is needed. Methods to detect centres of concentrated activity, related to the presence of highly active and well‐connected species that take a central role in the anaerobic digestion process, have to be optimized. Bioaugmentation could serve as a crucial tool to introduce keystone species that may create or sustain such centres. Functional stability can be maintained by keeping the microbial community active. This results in a clear trade‐off between functionally active and redundant microorganisms as primary basis for microbial community organization. Finally, a microbial community based prediction strategy for advanced process control is formulated.

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Section: Microbial Communication In Admentioning

confidence: 97%

Section: Microbial Communication In Admentioning

confidence: 97%

Perspectives for microbial community composition in anaerobic digestion: from abundance and activity to connectivity

Vrieze

Verstraete

2016

Environmental Microbiology

108

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“…Subsequently, the signalling molecule-based quorum sensing (QS) system could not regulate EPS production normally after being adversely influenced by the extreme alkaline shock [ 11 , 40 ]. Previous studies [ 41 , 42 ] have reported that the signalling molecule-based QS system could regulate EPS secretion under normal conditions. Subsequently, these parameters were gradually recovered during the recovery phase.…”

Section: Resultsmentioning

confidence: 99%

“…Badalamenti et al [ 44 ] reviewed one of 38 putative multiheme c-type cytochromes containing 69 heme-binding motifs and concluded that a LuxI/LuxR QS cassette can produce an unidentified signalling molecule. A signalling molecule-based QS system could regulate EPS secretion [ 41 , 42 ]. Zhang et al [ 45 ] confirmed that C8-HSL and C6-HSL, the examples of signalling molecules, favour EPS production and improve the activity of anammox bacteria, AOB, and others.…”

Section: Resultsmentioning

confidence: 99%

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Yang

Mao

Wang

et al. 2020

Archaea

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Responses of a microbial community in the completely autotrophic nitrogen removal over nitrite (CANON) process, which was shocked by a pH of 11.0 for 12 h, were investigated. During the recovery phase, the performance, anaerobic ammonia oxidation (anammox) activity, microbial community, and correlation of bacteria as well as the influencing factors were evaluated synchronously. The performance of the CANON process deteriorated rapidly with a nitrogen removal rate (NRR) of 0.13 kg·m-3·d-1, and Firmicutes, spore-forming bacteria, were the dominant phyla after alkaline shock. However, it could self-restore within 107 days after undergoing four stages, at which Planctomycetes became dominant with a relative abundance of 64.62%. Network analysis showed that anammox bacteria (Candidatus Jettenia, Kuenenia, and Brocadia) were positively related to some functional bacteria such as Nitrosomonas, SM1A02, and Calorithrix. Canonical correspondence analysis presented a strong correlation between the microbial community and influencing factors during the recovery phase. With the increase of nitrogen loading rate, the decrease of free nitrous acid and the synergistic effects, heme c content, specific anammox activity (SAA), NRR, and the abundance of dominant genus increased correspondingly. The increase of heme c content regulates the quorum sensing system, promotes the secretion of extracellular polymeric substances, and further improves SAA, NRR, and the relative abundance of the dominant genus. This study highlights some implications for the recovery of the CANON reactor after being exposed to an alkaline shock.

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“…Bioaugmentation in which a strain or a microbial community that secretes a special substance is inoculated into an autochthonal bacteria to accelerate the degradation of pollutants, is a biological treatment technology that does not produce secondary pollution (Tyagi et al ). In recent years, bioaugmentation technology that adds specific functional micro‐organisms on the basis of not changing the existing treatment facilities can greatly improve the original biological treatment system for the removal of target pollutants, and sewage treatment capacity has been greatly improved (Ding et al ). Thus, increasing attention has been paid to bioaugmentation technology.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of AHLs‐secreting strainAeromonassp. A‐L2 and its bioaugmentation during quinoline biodegradation

Gao

Liu

et al. 2019

J Appl Microbiol

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Aims In order to probe a more environmentally friendly method of pollutant treatment based on microbial bioaugmentation and quorum sensing (QS) effects. Methods and Results The dynamic characteristics and QS effects of the acylated homoserine lactones (AHLs)‐secreting strain Aeromonas sp. A‐L2 (A‐L2), which was isolated from the activated sludge system, was discussed. According to the liquid chromatography‐mass spectrometry results, N‐butyryl‐homoserine lactone (C4‐HSL) and N‐hexanoyl‐homoserine lactone (C6‐HSL) were the major AHLs secreted by strain A‐L2, and the swarming of strain Ochrobactrum sp. LC‐1 (LC‐1) was induced by these compounds. The extracellular polymeric substance secretion of the strain LC‐1 was mainly led by C6‐HSL, and the biofilm formation ability was mainly influenced by C6‐HSL or C4‐HSL (60 μg l−1). The optimal AHLs secretion conditions of strain A‐L2 were also studied. Drawing support from the AHLs‐secreting strain A‐L2 during quinoline degradation by strain LC‐1, the degradation time was greatly shortened. Conclusions Hence, AHLs‐secreting strain A‐L2 can be useful as an AHLs continuous supplier during bioaugmentation and pollutant biodegradation. Significance and Impact of the Study The bioaugmentation process of strain A‐L2 on quinoline biodegradation based on QS effects would lay a certain theoretical and practical significance for large‐scale applications.

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A sustainable method for effective regulation of anaerobic granular sludge: Artificially increasing the concentration of signal molecules by cultivating a secreting strain

Cited by 60 publications

References 23 publications

Perspectives for microbial community composition in anaerobic digestion: from abundance and activity to connectivity

Perspectives for microbial community composition in anaerobic digestion: from abundance and activity to connectivity

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Dynamic characteristics of AHLs‐secreting strainAeromonassp. A‐L2 and its bioaugmentation during quinoline biodegradation

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