Novel cationic chitosan-like bioflocculant from Citrobacter youngae GTC 01314 for the treatment of kaolin suspension and activated sludge

Hatta, Nur Syahirah Mohamed; Lau, Shiew Wei; Takeo, Masahiro; Chua, Han Bing; Baranwal, Priyanka; Mubarak, Nabisab Mujawar; Khalid, Mohammad

doi:10.1016/j.jece.2021.105297

Cited by 9 publications

(1 citation statement)

References 48 publications

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“…Hydrogen bonding occurs when hydroxyl and amide functional groups are present [43]. The chemical structure of bioflocculants contains functional groups that facilitate the bridging process by offering binding sites to attach contaminants or particles [44].…”

Section: Confirmation Of Flocculation Mechanism Through Bonding Type ...mentioning

confidence: 99%

Bioflocculant Producing Bacillus megaterium from Poultry Slaughterhouse Wastewater: Elucidation of Flocculation Efficacy and Mechanism

Mukandi,

Basitere,

Ntwampe

et al. 2024

Applied Sciences

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The study focused on isolating bioflocculant-producing microorganisms from poultry slaughterhouse wastewater (PSW). Microorganisms (n = 20) were isolated, and the D2 isolate, identified as Bacillus megaterium using 16S rDNA and RpoD (sigma 70), had maximum flocculation activity. Furthermore, characteristics of the bioflocculant produced by B. megaterium were determined, and the optimum storage conditions, including the flocculation mechanism, were identified. The bioflocculant was composed mainly of polysaccharides and proteins and was better stored frozen in a crude form. Furthermore, the flocculation efficacy was assessed using response surface methodology at pH 4 (min) and 9 (max), bioflocculant dosage of 1% (min) and 3% (max, v/v), indicating pH 6.5 and dosage of 2% (v/v) as optimum flocculation conditions for floc formation under ambient temperature. These results were further confirmed with microscopy assessments with zeta potential measurements confirming that the bioflocculant was ionic, albeit charge neutralization was not the primary mechanism for floc agglomeration. Hydrogen bonding was predominant, indicative of a neutralization-bridging mechanism, an assertion also based on the functional groups prevalent in the isolate-B. megaterium. The results obtained indicate that bioflocculants can be used to treat isolates that are sourced from wastewater.

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Section: Confirmation Of Flocculation Mechanism Through Bonding Type ...mentioning

confidence: 99%

Bioflocculant Producing Bacillus megaterium from Poultry Slaughterhouse Wastewater: Elucidation of Flocculation Efficacy and Mechanism

Mukandi,

Basitere,

Ntwampe

et al. 2024

Applied Sciences

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Plant-based coagulants/flocculants: characteristics, mechanisms, and possible utilization in treating aquaculture effluent and benefiting from the recovered nutrients

Alnawajha

Kurniawan

Imron

et al. 2022

Environ Sci Pollut Res

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In situ kinetics and flocs conformation studies of kaolinite flocculated by Chi-g-CPAM

Zou

Ren

et al. 2023

Int J Miner Metall Mater

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Novel cationic chitosan-like bioflocculant from Citrobacter youngae GTC 01314 for the treatment of kaolin suspension and activated sludge

Cited by 9 publications

References 48 publications

Bioflocculant Producing Bacillus megaterium from Poultry Slaughterhouse Wastewater: Elucidation of Flocculation Efficacy and Mechanism

Bioflocculant Producing Bacillus megaterium from Poultry Slaughterhouse Wastewater: Elucidation of Flocculation Efficacy and Mechanism

Plant-based coagulants/flocculants: characteristics, mechanisms, and possible utilization in treating aquaculture effluent and benefiting from the recovered nutrients

In situ kinetics and flocs conformation studies of kaolinite flocculated by Chi-g-CPAM

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