Influence of velocity gradient and rapid mixing time on flocs formed by polysilica iron (PSI) and polyaluminum chloride (PACl)

Aktas, Tugrul Selami; Fujibayashi, Megumu; Maruo, Chikako; Nomura, Munehiro; Nishimura, Osamu

doi:10.1080/19443994.2012.751883

Cited by 12 publications

(3 citation statements)

References 22 publications

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“…But on the contrary, it also affected the stability of the flocs if the mixing time took longer. It caused flocs breakage and size reduction [20,21].…”

Section: Resultsmentioning

confidence: 99%

The The Effect of Velocity Gradient and Camp Number on Solids Removal using Bio-Coagulant from Corbula faba Hinds Shells

Nurmawati

Wahyusi

Dewati

et al. 2022

IJEISE

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The TSS and TDS values of water are required to meet the standard. Like coagulation, the pretreatment process in water helps reduce solid content in water. The coagulant destabilizes water pollutants and helps flocs formation with the coagulation process. This paper studies the performance of chitosan bio-coagulant produced from Corbula faba Hinds shells. The velocity gradient and the Camp number of solids removal were also evaluated. The velocity and period of rapid mixing varied from 110 to 150 rpm, and the velocity gradient (G) was 181.2 to 288.5 s-1. The mixing period also ranged from 1 to 5 minutes. The highest TSS and TDS removal resulted in 140 rpm or 260.2 s-1 and 4 minutes of mixing. The residual TSS and TDS decreased with the increase of Camp Number until reaching a point and increased again afterward.

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“…But on the contrary, it also affected the stability of the flocs if the mixing time took longer. It caused flocs breakage and size reduction [20,21].…”

Section: Resultsmentioning

confidence: 99%

The The Effect of Velocity Gradient and Camp Number on Solids Removal using Bio-Coagulant from Corbula faba Hinds Shells

Nurmawati

Wahyusi

Dewati

et al. 2022

IJEISE

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“…The principle of coagulation is the destabilization of suspended particles by reducing the repulsive forces between the particles by adding the coagulant. Destabilized particles then collide with each other to form a large size of floc which easily precipitates [3,4]. The effectiveness of coagulation depends on several factors, for example, temperature, pH, coagulant type and dose, and mixing conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rapid-Mixing Duration on Floc Growth in the Coagulation of Peat Water with Sesbania grandiflora Seed as Measured by DinoCapture 2.0

Putra¹,

Fitria²

2023

Atlantis Highlights in Chemistry and Pharmaceutical Sciences

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The coagulation treatment was applied to the synthetic peat water using Sesbania grandiflora seed. One of the factors to enhance coagulation is rapid and slow mixing. Rapid mixing is crucial to promote the interaction of coagulant with suspended particles and the formation of micro flocs. While slow mixing is crucial to promote aggregation between microflocs. In this study, rapid mixing was varied from 5 to 10 and 15 min during the coagulation process. Microscopic method analysis was used to obtain the data using a camera and computer. Flocs formed are captured by DinoCapture 2.0 software equipped with a Dino-Lite handheld digital microscope resulting in microscopic images of the flocs. Afterward, direct measurement of a magnified floc image is applied by using a calibrated scale on the floc image, so a large number of floc sizes can be obtained. Image analysis results from DinoCapture 2.0 showed that the longer duration of the rapid-mixing time, the larger size of floc formed, but in contrast, the number of flocs decreased. The optimum time for rapid mixing was 5 min and 30 min for slow mixing, according to the highest number of flocs formed, with the floc size spread evenly under 0.2 mm. Rapid-mixing time of 5/30 min was applied to the coagulation of peat water so that the floc could grow well and coagulation could be carried out optimally. This is because a mixing time that is too short can reduce floc formation, but a very long mixing time can cause floc breakage.

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“…Neste processo, a base foi adicionada para aumentar o pH, causando a formação de flocos através do mecanismo da neutralização de carga. A colisão interpartículas, promovida pelo GMR e TMR durante a coagulação, tem influência direta no diâmetro médio dos flocos(AKTAS et al, 2013). Como o tamanho do floco afeta diretamente a eficiência de flotação (AHMED;JAMESON, 1985), é crucial a investigação desses parâmetros.…”

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Cultivo de >i<Chlorella sorokiniana>/i< em mistura de esgoto sanitário e suíno e separação da biomassa por sedimentação e flotação por ar dissolvido (FAD)

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Influence of velocity gradient and rapid mixing time on flocs formed by polysilica iron (PSI) and polyaluminum chloride (PACl)

Cited by 12 publications

References 22 publications

The The Effect of Velocity Gradient and Camp Number on Solids Removal using Bio-Coagulant from Corbula faba Hinds Shells

The The Effect of Velocity Gradient and Camp Number on Solids Removal using Bio-Coagulant from Corbula faba Hinds Shells

Effect of Rapid-Mixing Duration on Floc Growth in the Coagulation of Peat Water with Sesbania grandiflora Seed as Measured by DinoCapture 2.0

Cultivo de >i<Chlorella sorokiniana>/i< em mistura de esgoto sanitário e suíno e separação da biomassa por sedimentação e flotação por ar dissolvido (FAD)

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