Monitoring biofouling based on aerobic respiration in reverse osmosis system

Yu, Youngjae; Park, Keun‐Young; Jung, Jae‐Hyun; Song, Wonjung; Kim, Jaehyeok; Ryu, JunHee; Lade, Harshad; Kweon, Ji Hyang

doi:10.1016/j.jes.2018.10.003

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…The extracted EPS was quantified as the sum of its main components, protein (PN) and polysaccharide (PS). Proteins were analyzed using a Bio-Rad protein assay (Protein Assay Kit I 5000001, Bio-Rad, Boulder, CO, USA) based on the Bradford dye-binding method [23,24]. For protein quantification, a standard curve was prepared using 2 mg/mL bovine serum albumin stock solution.…”

Section: Eps Analysismentioning

confidence: 99%

“…Because the structure of the biofilm was not homogeneously distributed, both the central portions of the membrane were analyzed. Figure 6 shows the CLSM image of the biofilm above the membrane; the stronger the fluorescence of microorganisms, the brighter the green fluorescence appears [24]. Most cells As the hydrophobicity of the sludge floc increases, bioflocculation increases, and adhesion can be improved [25].…”

Section: Biofilm Formationmentioning

confidence: 99%

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Acceleration of Aerobic Granulation in Sidestream Treatment with Exogenous Autoinducer

Jang

Min

Lee

et al. 2023

Water

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Aerobic granular sludge (AGS) is a special type of biofilm formed by the self-aggregation of microorganisms and extracellular polymers and is considered a promising technology for wastewater treatment. However, new strategies are still being proposed as to how to improve the extracellular polymeric substances (EPS) production that influences the formation of AGS. Recently, the acceleration of aerobic granulation using autoinducers such as N-acyl-homoserine lactone (AHL)-mediated quorum sensing has been reported. However, it is not yet fully understood due to knowledge gaps on the correlations depending on the type of AHL used. In this study, to evaluate the effects of various AHL on the AGS formation of activated sludge, the secretion of extracellular polymeric substances, biofilm formation, and sludge characteristics were comprehensively investigated. Among the AHL types, tightly bound EPS (TB-EPS) and loosely bound EPS (LB-EPS) in the reactor with C8-HSL added were 18.49 and 74.07 mg/g VSS, respectively, which represented increases of 3.15% and 53.76% compared to the control group. Additionally, C8-HSL increased the relative hydrophobicity and biomass volume by 153% and 218%, respectively. As a result, AHL had a positive effect on biomass content, an increase in sludge size, and an improvement in sludge sedimentation in the early stage of granulation, and C8-HSL was found to be the most suitable for initial granulation among AHL types.

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Section: Eps Analysismentioning

confidence: 99%

Section: Biofilm Formationmentioning

confidence: 99%

Acceleration of Aerobic Granulation in Sidestream Treatment with Exogenous Autoinducer

Jang

Min

Lee

et al. 2023

Water

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Superhydrophobic nanocarbon‐based membrane with antibacterial characteristics

Aljumaily

AlSaadi

Hashim

et al. 2020

Biotechnology Progress

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To overcome the biofouling challenge which faces membrane water treatment processed, the novel superhydrophobic carbon nanomaterials impregnated on/powder activated carbon (CNMs/PAC) was utilized to successfully design prepare an antimicrobial membrane. The research was conducted following a systematic statistical design of experiments technique considering various parameters of composite membrane fabrication. The impact of these parameters of composite membrane on Staphylococcus aureus growth was investigated. The bacteria growth was analyzed through spectrophotometer and SEM. The effect of CNMs' hydrophobicity on the bacterial colonies revealed a decrease in the abundance of bacterial colonies and an alteration in structure with increasing the hydrophobicity. The results revealed that the optimum preparative conditions for carbon loading CNMs/PAC was 363.04 mg with a polymer concentration of 22.64 g/100 g, and a casting knife thickness of 133.91 μm. These conditions have resulted in decreasing the number of bacteria colonies to about 7.56 CFU. Our results provided a strong evidence on the antibacterial effect and consequently on the antibiofouling potential of CNMs/PAC in membrane.

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Modification of polyvinylidene fluoride membrane by quaternary ammonium compounds loaded on silica nanopollens for mitigating biofouling

Zhai

Zhang

et al. 2020

Journal of Membrane Science

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Monitoring biofouling based on aerobic respiration in reverse osmosis system

Cited by 5 publications

References 41 publications

Acceleration of Aerobic Granulation in Sidestream Treatment with Exogenous Autoinducer

Acceleration of Aerobic Granulation in Sidestream Treatment with Exogenous Autoinducer

Superhydrophobic nanocarbon‐based membrane with antibacterial characteristics

Modification of polyvinylidene fluoride membrane by quaternary ammonium compounds loaded on silica nanopollens for mitigating biofouling

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