Exploring interactions between quorum sensing communication and microbial development in anammox membrane bioreactor

Gao, Mengjiao; Zou, Xin; Dang, Hongyu; Mohammed, Abdul; Yang, Sen; Zhou, Yun; Yao, Yiduo; Guo, Hengbo; Liu, Yang

doi:10.1016/j.jece.2023.109339

Cited by 7 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This finding aligns with previous reports on the majority of anammox systems [47,48]. Chloroflexi had the highest percentage in this study, and it was also found in a high percentage of many anammox systems [49]. Chloroflexi was reported to provide a stable skeleton for granular sludge formation along with cellular organic matter and metabolites of dead microorganisms [50].…”

Section: Sludge Surface Characteristics and Microbial Community Struc...supporting

confidence: 93%

“…This is an essential direction for future research. Quorum sensing can provide insights into the effects of environmental quorums on the metabolic substrates of AnAOB [49,60]. Metabolomics and molecular modeling facilitate further insights into the biometabolic pathways of AnAOB during the enrichment process [61].…”

Section: Discussion Of Factors Influencing Anammox Enrichmentmentioning

confidence: 99%

See 1 more Smart Citation

Enrichment of Anammox Bacteria Using Anammox Sludge as a Primer Combined with Ordinary Activated Sludge

Liu

Hu²,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

Anaerobic ammonia oxidation bacteria (AnAOB) are difficult to cultivate due to their long start-up time and sensitivity to environmental conditions. In this study, anammox granular sludge was cultured with ordinary activated sludge under influent dissolved oxygen concentrations of 6–8 mg/L, successfully enriching AnAOB. The presence of multiple microorganisms in the activated sludge enabled the anammox system to resist the unfavorable influent environment and sustain system stability. The total nitrogen removal rate reached a maximum of 81%, and the TN effective load increased from 0.1 to 1.5 kg N/m3/d. The results showed that the dissolved oxygen present in the influent did not lead to a breakdown in the anammox system. The protein in the sludge extracellular polymeric substances played an important role in the enrichment of AnAOB, and the sludge settling performance at the bottom of the reactor was better than that at the top of the reactor, with protein/polysaccharide in the range of 5–6.3. Candidatus brocadia and Candidatus kuenenia were the main anammox functional bacteria in the system. On 153 d of reactor operation, their relative abundances were 8.51 and 5.68%, respectively. This study shows that microorganisms in activated sludge contribute to the stability of the anammox system when the influent conditions are appropriate. This provides a new idea for the rapid start-up of the anammox system and enrichment of AnAOB.

show abstract

Section: Sludge Surface Characteristics and Microbial Community Struc...supporting

confidence: 93%

Section: Discussion Of Factors Influencing Anammox Enrichmentmentioning

confidence: 99%

Enrichment of Anammox Bacteria Using Anammox Sludge as a Primer Combined with Ordinary Activated Sludge

Liu

Hu²,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…The relative abundances of genes relative to flagella assembly were increased at 25 mg/L GO and then decreased at 100 mg/L (Figure a). Flagella could mediate cell motility and colonization . Low GO concentration might improve the activity of bacteria, enabling them to propel themselves using flagella and extract nutrients from the environment.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Flagella could mediate cell motility and colonization. 48 Low GO concentration might improve the activity of bacteria, enabling them to propel themselves using flagella and extract nutrients from the environment. In this work, bacteria could capture more ammonium and nitrite by accelerated motility, resulting in an increased NRR at 25 mg/L GO.…”

Section: Cell Motility and Quorummentioning

confidence: 99%

Dosage-Dependent Impacts of Graphene Oxide on the Anammox Process: Performance and Mechanism

Xie,

Zou,

Ismail

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

The effects of various dosages of graphene oxide (GO) on the performance of anammox and the underlying mechanisms are not yet fully understood, necessitating the provision of additional details. In this work, the dosage-dependent impacts of GO on the anammox system were investigated from the perspective of molecular biology analysis. The nitrogen removal efficiency (NRE) continuously increased at 10−100 mg/L GO, and a high nitrogen removal rate (NRR) was obtained at 25 mg/L GO. GO also improved the content of extracellular polymer substance (EPS) and the abundances of hzs and nirS genes. Molecular docking demonstrated that GO had a strong binding with the hydrazine synthase enzyme. Microbial analysis revealed that denitrifying bacteria, such as Denitratisoma and OLB13, were enriched, indicating that the high NRE could be attributed to the synergistic effect between denitrification and anammox processes. The analysis of microbial functions suggested that GO could impact various metabolic activities, such as quorum sensing, extracellular electron transfer, and membrane transport. Above all, this work provided detailed insights into the effects of different GO dosages on the anammox system.

show abstract

“…During the fouling process, microorganisms attach on the surface of the membrane and its pores start clogging, and in time this can lead to the formation of cake layers. Furthermore, it was often hypothesised that microorganisms in the MBR might interact together by quorum sensing (QS) [ 11 ]. The latter is a phenomenon in which bacteria carry out cell-to-cell communication.…”

Section: Introductionmentioning

confidence: 99%

Prolonging the Life Span of Membrane in Submerged MBR by the Application of Different Anti-Biofouling Techniques

et al. 2023

View full text Add to dashboard Cite

The membrane bioreactor (MBR) is an efficient technology for the treatment of municipal and industrial wastewater for the last two decades. It is a single stage process with smaller footprints and a higher removal efficiency of organic compounds compared with the conventional activated sludge process. However, the major drawback of the MBR is membrane biofouling which decreases the life span of the membrane and automatically increases the operational cost. This review is exploring different anti-biofouling techniques of the state-of-the-art, i.e., quorum quenching (QQ) and model-based approaches. The former is a relatively recent strategy used to mitigate biofouling. It disrupts the cell-to-cell communication of bacteria responsible for biofouling in the sludge. For example, the two strains of bacteria Rhodococcus sp. BH4 and Pseudomonas putida are very effective in the disruption of quorum sensing (QS). Thus, they are recognized as useful QQ bacteria. Furthermore, the model-based anti-fouling strategies are also very promising in preventing biofouling at very early stages of initialization. Nevertheless, biofouling is an extremely complex phenomenon and the influence of various parameters whether physical or biological on its development is not completely understood. Advancing digital technologies, combined with novel Big Data analytics and optimization techniques offer great opportunities for creating intelligent systems that can effectively address the challenges of MBR biofouling.

show abstract

Exploring interactions between quorum sensing communication and microbial development in anammox membrane bioreactor

Cited by 7 publications

References 50 publications

Enrichment of Anammox Bacteria Using Anammox Sludge as a Primer Combined with Ordinary Activated Sludge

Enrichment of Anammox Bacteria Using Anammox Sludge as a Primer Combined with Ordinary Activated Sludge

Dosage-Dependent Impacts of Graphene Oxide on the Anammox Process: Performance and Mechanism

Prolonging the Life Span of Membrane in Submerged MBR by the Application of Different Anti-Biofouling Techniques

Contact Info

Product

Resources

About