quantitative investigation of flocs flotation
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quantitative investigation of flocs flotation

[Quantitative investigation on flocculation and ...

[Quantitative investigation on flocculation and destruction of poly-silicic-ferric (PSF) coagulant]. ... The PFA flocs are much easier destructed than PSF flocs when increasing the turbulent shear force, and the destructed PSF flocs tend to be more easily re-coupled than PFA flocs. From the order magnitude, the flocculation coefficient KA of ...

Dissolved Air Flotation

then called flocs. The flocs are removed by Dissolved Air Flotation, sedimentation and filtration units. The disinfection process is considered as the final stage to reach the chemical and microbiological standards. Figure 1. A general treatment process consists of three different stages. At the pre-treatment step coarse particles will be removed.

Quantitative contribution study and comparison between ...

Jul 01, 2020  The sewage treated by separate reaction has lower oil removal efficiency and poor flocs property, indicating that the separation of anode and cathode not only affects the growth of the flocs, but also affects the promotion effect of flotation on the shape and strength of flocs

(PDF) Research on fractal and microscopic quantitative ...

a), (b) and (c) show the SEM images of different settlement height positions, and Figure 3 illustrates the extraction positions. At location 1 (top), the size of the flocs is large, and most of ...

An efficient separation for metal-ions from wastewater by ...

Jan 01, 2021  Hence the precipitate flotation is beneficial for the effectively growth and removal of fine particles from suspension. However, the growth evolution of metal-reagent precipitate particles/flocs in precipitate-flotation process need to further describe systematically in a quantitative way.

Quantitative investigation of hydraulic mixing energy ...

Sep 01, 2018  Quantitative investigation of hydraulic mixing energy input during batch mode anaerobic digestion and its impact on performance. ... Disruption of the substrate-microbe flocs produced less favourable conditions for hydrolytic bacteria, resulting in less production of biomass and more biogas. ... which is thickened using dissolved air flotation ...

A simple and rapid HPLC method for the quantitative ...

Sep 01, 2019  The adsorption capacity and the adsorption mechanism of NaOL on the mineral surface are important for understanding flotation behaviour. In this study, a simple, nontoxic and rapid quantitative analysis method of High Performance Liquid Chromatography (HPLC) for residual sodium oleate concentration was proposed and verified.

Preparation and Properties of Cage-Like Nano ZnO ...

Quantitative Investigation of Flocs Flotation Removal and Hydrocyclonic Separation for the Washing Water Treatment p.1857. Preparation and Properties of Cage-Like Nano ZnO p.1862. Effects of Freeze-Thaw Circumstance on Stress and Displacement Filed of Tunnel Surrounding Rock ...

The Research on Comparison and Conversion of Two Friction ...

Quantitative Investigation of Flocs Flotation Removal and Hydrocyclonic Separation for the Washing Water Treatment p.1857. Preparation and Properties of Cage-Like Nano ZnO p.1862. Effects of Freeze-Thaw Circumstance on Stress and Displacement Filed of Tunnel Surrounding Rock ...

A short overview of the formation of aerated flocs and ...

additional investigation is needed. In this context, Oliveira et al. (2010) developed a new technique named Aerated Flocs Character-isation (AFC) for characterising the aerated flocs (multiphase sys-tems) formed in flocculation–flotation studies. This technique used two cameras that were positioned orthogonal to each other.

Yi Yong Yang's research works China University of ...

Quantitative Investigation of Flocs Flotation Removal and Hydrocyclonic Separation for the Washing Water Treatment ... A new hydrocyclone and gas-flotation device was designed and tested for the ...

Floc flotation of galena and sphalerite fines Request PDF

The flotation of galena and sphalerite fines in the form of flocs, which is termed floc flotation, has been studied in the present work. The flocs formed through hydrophobic flocculation induced ...

Research on fractal and microscopic quantitative ...

Abstract: In this paper, a series of laboratory investigations are carried out to explore the effect of flocculant type on the spatial morphology and microstructural characteristics of flocs in the flocculation and settling of tailings.Four types of flocculants (ZYZ, JYC-2, ZYD and JYC-1) are considered in this study. The fractal characteristics and internal structure of tailings flocs with ...

Minerals Free Full-Text Flocs Properties and Flotation ...

Energy input, an important factor affecting flocs properties and flotation performance, has rarely been studied in the field of diaspore flotation, which has severely limited our understanding of the flocculation flotation of fine diaspore. Therefore, in this study, the flocs properties and flotation performance of fine diaspore with energy input pretreatment were studied through flotation ...

Bench and Pilot Plant Programs for Flotation Circuit Design

Quantitative information on liberation can be obtained by mineralogy. Even quali-tative mineralogy can effectively guide the flotation investigation, (for example, “the sphalerite in the copper concentrate is mostly liberated.”) Therefore, use of mineralogy is one of the most important tools available to flotation

Surfactants as Bubble Surface Modifiers in the Flotation ...

In this paper we present an investigation into the use of bubbles modified with surfactants in dissolved air flotation (DAF). Bubble modification was investigated by dosing surfactants of varying character into the saturator of a DAF unit in turn. The cell removal efficiency only improved when using a cationic surfactant where optimum removal of Microcystis aeruginosa cells was obtained when ...

Effective harvesting of microalgae by coagulation–flotation

Nov 15, 2017  This study developed a coagulation–flotation process for microalgae Chlorella sp. XJ-445 harvesting, which was composed of algal surface modification by combined use of Al 3+ and cetyltrimethylammonium bromide (CTAB) and followed dispersed bubble flotation. Dissolved organic matter (DOM) in the medium was firstly characterized and mainly consisted of hydrophilic low

Breakage, Regrowth, and Fractal Nature of Natural Organic ...

The growth, breakage, regrowth, and fractal nature of flocs was investigated by use of a laser diffraction particle sizing device. A range of coagulants were investigated for the coagulation of natural organic matter (NOM) and compared to other coagulated systems. The results showed NOM floc structural characteristics varied in steady-state size depending upon which coagulant was used. When ...

Particle visualisation--a tool for determination of rise ...

Particles from a post denitrifying Kaldnes Moving Bed Process were studied using an optical borescope, a visualisation technique that provides opportunities for both qualitative and quantitative studies of the separation mechanism in Dissolved Air Flotation (DAF). Rise rates for particle/bubble aggregates were estimated showing great variability.

1 Research Article 2 Operating Parameters Affecting the ...

of Kaolin Aerated Flocs in Water and Wastewater Treatment The formation of aerated flocs (aeroflocs) and the main operating parameters involved were studied to improve the rapid solid/liquid separation by flocculation–flotation. A continuous flow system at the laboratory scale

Shear hydrophobic flocculation and flotation of ultrafine ...

The flotation experiments were carried out at a hanging cell flotation machine using 6.00 g hematite sample and 100 mL distilled water. Dilute NaOH or H2SO4 was used to adjust pH. Flotation time was 5 min. 2.3 Mean flocs size calculation The flocs feature was observed and the diameters of all counted flocs were measured with a biological ...

Minerals Free Full-Text Flocs Properties and Flotation ...

Energy input, an important factor affecting flocs properties and flotation performance, has rarely been studied in the field of diaspore flotation, which has severely limited our understanding of the flocculation flotation of fine diaspore. Therefore, in this study, the flocs properties and flotation performance of fine diaspore with energy input pretreatment were studied through flotation ...

(PDF) The development and application of the hybrid ...

Results showed that the aerated flocs are readily floated with rising rates of the order of 120 m h À1 , values higher than those obtained for the settling of the nonaerated flocs (18–24 m h À1).

Bubble velocity measurement for the determination of ...

determination of nanoparticle flotation efficiencies Lucie Vialaret 1,2,3, Mallorie Tourbin 2,3, Pascal Guiraud 1,3 1 ... Capture of bubbles by the flocs . after flocculation . during flocculation . ... Experimental investigation .

US9321663B2 - Flotation and separation of flocculated oils ...

Oily and/or solids-containing water is clarified by chemical treatment to form flocculated and agglomerated solid phases and a clear water phase. In the clarification process, microbubbles of air or other gas are introduced at atmospheric pressure, via an eductor or other suitable device, together with a flocculant. During the subsequent formation of floes and their agglomeration into larger ...

Investigation of the hydrolysis of aqueous solutions of ...

The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric with additional details about the score and the social media presence for the given article. ... Effect of polyaluminum chloride on the flotation separation of coal ...

Investigation on the role of surfactants in bubble-algae ...

In this work, a fundamental study was carried out on the role of surfactants in bubble-algae interaction to improve the understanding of how surfactants influence the flotation performance.

Investigation of the Physics of Flocculation in Algal ...

Algae biofuel production has gained a great deal of interest in recent years due to the high photosynthetic efficiency of various algae strains and the ability of stressed algae populations to produce large quantities of lipids within their cells. Separation of the algae from the background aqueous medium engenders large energetic costs for standard separation techniques including filtration ...

An investigation of dual-step ozone induced flotation ...

P.R. Wilinski, J. Naumczyk, Dissolved Ozone Flotation as a Innovative and Prospect Method for Treatment of Micropollutants and Wastewater Treatment Costs Reduction, 12th ed., World Wide Workshop for Young Environmental Scientists, Arcueil, France, 2012, pp. 1–7. ... R.T. Rodrigues, J. Rubio, A new technique for characterizing aerated flocs in ...

Topic 4 - Pulp Suspensions - University of British Columbia

Headbox, whitewater flotation de-inking 0.01-0.1% Ultra Low Consistency Clarifier, clear white water ... slipping past flocs, or individual fibres slipping past one another ... One of the most useful quantitative parameters we have for accomplishing this is the power dissipation per unit volume, ...

INVESTIGATION OF EFFECTIVE PARAMETERS FOR

Flotation schemes for the separation of molybdenite from ores are based on the inherent natural flotation of molybdenite. Chander and Fuerstenau (1972) undertook a detailed investigation to elucidate the factors that affect the surface properties of MoS 2 which in turn govern the natural flotation

Water Treatment and the Role of Zeta Potential in Water ...

May 12, 2005  Zeta Potential, Sedimentation and Flotation. Zeta potential affects the size and density of flocs formed. Increases in density cause more rapid flocculation. Low zeta potentials reduce the electrostatic interactions between particles allowing the particles to approach closely and hence produce more compact flocs.

Shear-induced structuration of confined carbon black gels ...

The width of the vorticity-aligned flocs coincides with the gap width and is also independent of C and , which hints to a simple picture in terms of compressible cylindrical flocs. Finally, we show that there exists a critical shear rate c above which structuration does not occur and that c scales as h − α with α = 1.4 ± 0.1 independently ...

Design and performance evaluation of hydrocyclones for ...

A new hydrocyclone and gas-flotation device was designed and tested for the treatment of the wash water containing the flocs. The device separates particles and removes flocs simultaneously.

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