Study on the characteristics and mechanism of the flocculation behaviour in a novel fluidized bed flocculator

Lin, Zhe; Li, Chengxuan; Zhang, Xuezhi; Zhang, Haiyang

doi:10.1016/j.seppur.2022.122724

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…Rapid stirring at a speed of 400 rpm for one minute was performed to induce coagulation, resulting in a velocity gradient (G) of 365 s -1 . Subsequently, flocculation was achieved by reducing the stirring speed to 60 rpm for 20 minutes, resulting in a velocity gradient (G) of 40 s -1 (Lin et al, 2023).…”

Section: Concentration Tests Of G Duodenalis Cystsmentioning

confidence: 99%

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Cuello,

Alcázar,

Castellanos

2024

Rev. ambiente água

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This study assessed the ability of Pseudomonas aeruginosa, microencapsulated in gellan gum, to decontaminate dairy wastewater and explored the potential reuse of microcapsules. P. aeruginosa was microencapsulated using the internal ionic gelation technique, employing low-acyl gellan gum as the wall material. The free and microencapsulated P. aeruginosa were inoculated into 150 mL of sterile wastewater and incubated in a shaking flask (150 rpm) at 30°C. Subsequently, the Baranyi Model was employed to calculate the growth parameters of P. aeruginosa. Concurrently, Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) were determined. The obtained results indicated that the microencapsulation process reduced the growth rate of the encapsulated microorganism. However, the microencapsulated bacteria achieved COD and BOD reduction percentages of 61.54% and 64.05%, respectively. Similarly, when reusing the microcapsules, removal percentages exceeding 57.00% were achieved. These findings could have significant implications for the industry in terms of reducing effluent contamination caused by substantial amounts of pollutants. Keywords: dairy wastewater, gellan gum, microencapsulation, Pseudomonas aeruginosa.

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Section: Concentration Tests Of G Duodenalis Cystsmentioning

confidence: 99%

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Cuello,

Alcázar,

Castellanos

2024

Rev. ambiente água

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“…20. Diagrammatic representation of the main mechanisms involved in the auxiliary role of NBS in particle flotation processes (Rosa and Rubio, 2018) considered (Li, 2023). Everyone knows that ultrafine particles and microfine are difficult to be recovered by conventional froth flotation because of bubble-particle collisions' low probability.…”

Section: Study On the Effect Pattern Of Nbs On The Flotation Effect O...mentioning

confidence: 99%

Current status of research on nanobubbles in particle flotation

Chen,

Cheng

2024

Physicochem. Probl. Miner. Process.

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Froth flotation, as one of the most widely used separation approaches in mineral processing, is commonly used to recover valuable components from minerals. However, maintaining high flotation efficiencies is a serious challenge for conventional froth flotation in the face of decreasing particle size of the minerals to be sorted. To date, there have been plenty of reports on the software of nano-bubbles (NBS) in flotation, and the experimental consequences show that nano-bubbles' introduction has given rise to improvement's different grades in the recovery of varieties of minerals, which highlights the great potential of nano-bubbles for mineral flotation. Nanobubbles have smaller bubble radii and unusually high stability compared to conventional flotation bubbles, and their related behavior in flotation has been a hot research topic. This paper reviews some of the methods of preparing nanobubbles, equipment techniques for characterizing nanobubbles, factors affecting their stability, and some of the popular doctrines. In particular, the reinforcing mechanism of nanobubbles in the particle flotation process is discussed, first, the nanobubbles improve the electrostatic attractiveness with the particles by achieving the charge inversion while the nanobubbles that was adsorbed on the particles' surface will cover a share of the charge, which decreases the electrostatic repulsive force between the particles; and second, the nanobubbles can act as a bridge between the surfaces of the two particles, which advances the agglomeration between the particles. This review aims to be able to further advance the research related to the industrialization of nanobubbles.

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Mechanism of rapid settling algal flocs formation in a novel fluidized bed flocculator

Chen,

Li,

Zhang

et al. 2024

Algal Research

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Study on the characteristics and mechanism of the flocculation behaviour in a novel fluidized bed flocculator

Cited by 7 publications

References 24 publications

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Dairy wastewater treatment employing microencapsulated Pseudomonas aeruginosa on low acyl gellan gum

Current status of research on nanobubbles in particle flotation

Mechanism of rapid settling algal flocs formation in a novel fluidized bed flocculator

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