Acceleration of start-up of moving bed biofilm reactor at low temperature by adding specialized quorum sensing bacteria

Fu, Huimin; Wang, Jinfeng; Ren, Hongqiang; Ding, Lili

doi:10.1016/j.biortech.2022.127249

Cited by 33 publications

(4 citation statements)

References 49 publications

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“…However, the abundance of these genera in both MDS and LDS was under 2%. Pseudomonas (37.64%), Polynucleobacter (14.41%), Actimicrobium (8.09%), and Methylophilus (7.11%) prevailed at low temperatures, known for adapting to cold environments. − This elucidated why LDS exhibited a higher TCC than MDS and HDS, as stated in Section . MDNS displayed a more homogeneous bacterial community than MDS, with Simkania dominating at 11.17% among the 19 genera, exceeding 1%.…”

Section: Resultsmentioning

confidence: 81%

Reconsidering the Rationality of Ultrafiltration as the Ultimate Safeguard for Reclaimed Water Biosafety: Unexpected Risks Arise under Different Storage Conditions

Cui,

Ding,

et al. 2024

ACS EST Water

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Ultrafiltration, an advanced process for producing biologically safe reclaimed water, has confronted challenges from bacterial regrowth. We conducted a comprehensive investigation into the biosafety risks of ultrafiltration-treated reclaimed water under five distinct storage conditions, considering temperature variations, airborne bacterial invasion, and light. Although ultrafiltration removed over 97% of the bacterial load, bacterial regrowth occurred during storage. Elevated temperatures resulted in the highest heterotrophic plate count (HPC), while lower temperatures favored increased total cell count (TCC). Notably, lower temperatures facilitated a surge in the number of potential pathogenic bacteria. Light exposure also elevated the potential pathogenic bacteria. Surprisingly, high temperatures posed minimal biosafety risk. While airborne bacterial invasion insignificantly affected potential pathogenic bacterial count, it constituted 67 ± 4% of total regrowth bacteria, with membrane breakthrough bacteria comprising the remaining 33 ± 4%, as revealed by SourceTracker. The impact of storage conditions on the bacterial community structure varied, with temperature exerting the most significant effect. Correlation analysis affirmed the potential of UV254 and total fluorescence intensity as alternative indicators for HPC, and polysaccharide content emerged as a suitable substitute indicator for potential pathogenic bacterial count. Future endeavors should prioritize the development of integrated ultrafiltration processes designed to inhibit pathogen regrowth in reclaimed water treatment.

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Section: Resultsmentioning

confidence: 81%

Reconsidering the Rationality of Ultrafiltration as the Ultimate Safeguard for Reclaimed Water Biosafety: Unexpected Risks Arise under Different Storage Conditions

Cui,

Ding,

et al. 2024

ACS EST Water

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“…The use of quorum sensing (QS) in a biofilm reactor has recently gained significant research interest due to its vital role in biofilm formation, especially acyl-homoserine lactone (AHL) [ 61 ]. However, it is not economical or practical to regulate QS in a biofilm reactor through dosing pure AHL.…”

Section: Application Of Immobilised Cellsmentioning

confidence: 99%

“…However, it is not economical or practical to regulate QS in a biofilm reactor through dosing pure AHL. Dosing AHL-producing bacteria might instead be more reasonable [ 61 ]. Therefore, in the context of QS, bioaugmentation approaches are also very important.…”

Section: Application Of Immobilised Cellsmentioning

confidence: 99%

Current Trends in Bioaugmentation Tools for Bioremediation: A Critical Review of Advances and Knowledge Gaps

Muter

2023

Microorganisms

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Bioaugmentation is widely used in soil bioremediation, wastewater treatment, and air biofiltration. The addition of microbial biomass to contaminated areas can considerably improve their biodegradation performance. Nevertheless, analyses of large data sets on the topic available in literature do not provide a comprehensive view of the mechanisms responsible for inoculum-assisted stimulation. On the one hand, there is no universal mechanism of bioaugmentation for a broad spectrum of environmental conditions, contaminants, and technology operation concepts. On the other hand, further analyses of bioaugmentation outcomes under laboratory conditions and in the field will strengthen the theoretical basis for a better prediction of bioremediation processes under certain conditions. This review focuses on the following aspects: (i) choosing the source of microorganisms and the isolation procedure; (ii) preparation of the inoculum, e.g., cultivation of single strains or consortia, adaptation; (iii) application of immobilised cells; (iv) application schemes for soil, water bodies, bioreactors, and hydroponics; and (v) microbial succession and biodiversity. Reviews of recent scientific papers dating mostly from 2022–2023, as well as our own long-term studies, are provided here.

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“…The moving bed biofilm reactor (MBBR) is a wastewater treatment process that uses plastic carriers with a buoyancy close to water to support the development of the bioactive microbial biofilm [3,4]. This MMBR technology benefits by inoculation with bacterial strains with organic pollutant degradation ability and promoting biofilm formation [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Bioaugmentation Performance of a Bacterial Consortium for Moving Bed Biofilm Reactor (MBBR) Treating Municipal Wastewater

Brettfeld,

Cheoafa,

Constantinescu-Aruxandei

et al. 2023

Priochem 2023

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Acceleration of start-up of moving bed biofilm reactor at low temperature by adding specialized quorum sensing bacteria

Cited by 33 publications

References 49 publications

Reconsidering the Rationality of Ultrafiltration as the Ultimate Safeguard for Reclaimed Water Biosafety: Unexpected Risks Arise under Different Storage Conditions

Reconsidering the Rationality of Ultrafiltration as the Ultimate Safeguard for Reclaimed Water Biosafety: Unexpected Risks Arise under Different Storage Conditions

Current Trends in Bioaugmentation Tools for Bioremediation: A Critical Review of Advances and Knowledge Gaps

Bioaugmentation Performance of a Bacterial Consortium for Moving Bed Biofilm Reactor (MBBR) Treating Municipal Wastewater

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