flocculant Articles
-
Influence of flocculation on sediment deposition process at the Three Gorges Reservoir
By comparing the original particle gradation of sediment from the Three Gorges Reservoir with the single particle gradation, the differences in these two particle gradations showed that there is sediment flocculation in the Three Gorges Reservoir, which can accelerate the sediment deposition rate in the reservoir. In order to determine the influence of flocculation on the sediment settling ...
-
An investigation on role of salinity, pH and DO on heavy metals elimination throughout estuarial mixture
One of the most paramount processes that play a considerable role in reducing the concentration of heavy metals during estuarine mixing is flocculation. Not only does such a process cause a huge percentage of metals to come into the particulate phase, but also it provides ample nutrients for the aquatic life. In the present study, impact of such factors as salinity, pH and DO on flocculation of ...
-
Flocculation properties of a bioflocculant produced by
Bacillus licheniformis Studies of the flocculation properties of bioflocculant combined with its structure characterization are helpful to develop more effective bioflocculant. This paper reports findings of our research on the flocculation properties of the bioflocculant ZS-7 in the kaolin suspension based on its structure characterization. With the addition of 2 mg/L ZS-7 and 9 mM CaCl2, the optimum temperature for ...
-
Towards optimal design parameters for around-the-end hydraulic flocculators
ABSTRACTHydraulic flocculators are principally characterized by their volume (which determines the time of flocculation) and the water level difference between inlet and outlet (which determines the average energy dissipation).Within these constraints, however, the designer has many degrees of freedom, such as the average water depth, the number and spacing of baffles, the length of the gap at ...
-
Inorganic greywater matrix impact on photocatalytic oxidation: does flocculation of TiO2 nanoparticles impair process efficiency?
This study was conducted in order to clarify whether photocatalyst flocculation – as observed in biologically pretreated greywater – contributes to photocatalytic oxidation (PCO) efficiency impairment. Aqueous solutions of tetraethyleneglycol dimethylether spiked with different inorganic salts in concentrations as found in biologically treated greywater were investigated with respect to TiO2 ...
-
Changes in the two-dimensional and perimeter-based fractal dimensions of kaolinite flocs during flocculation: a simple experimental study
In this study, Couette flow experiments were performed to estimate the temporal evolution of the 2D and perimeter-based fractal dimension values of kaolinite flocs during flocculation. The fractal dimensions were calculated based on the projected surface area, perimeter length and length of the longest axis of the flocs as determined by sampling observation and an image-processing system. The ...
-
Abatement efficiency and controlling strategy of a cylindrical and a conical fluidized bed flocculator
The aggregation efficiency of colloidal kaolin particles by the turbulence caused by random movement of silica gel beads in a cylindrical (CFB) and an 8° conical fluidized bed (TFB) was studied in this paper, focusing on the control strategies of these novel processes. The abatement efficiencies as a function of the Camp number, velocity gradient (G) and flocculation time (T) were exploited. In ...
-
Towards optimal design parameters for around-the-end hydraulic flocculators
Hydraulic flocculators are principally characterized by their volume (which determines the time of flocculation) and the water level difference between inlet and outlet (which determines the average energy dissipation).Within these constraints, however, the designer has many degrees of freedom, such as the average water depth, the number and spacing of baffles, the length of the gap at the baffle ...
-
Flocculation properties of bioflocculant MBF-7 produced by Penicillium purpurogenum in kaolin suspension
The properties and modes of flocculation for kaolin suspension with bioflocculant MBF-7 produced by Penicillium purpurogenum, were investigated. The results showed that the optimum pH and dosage for flocculation was above 8 and more than 40 mg L−1, respectively. Flocculating activity of MBF-7 was increased in the presence of Mg2+, Ca2+, Al3+, or Fe3+, especially in the presence of Ca2+, while ...
-
A novel poly(acrylic acid-co-acrylamide)/diatomite composite flocculant with outstanding flocculation performance
Series of anionic flocculants with outstanding flocculation performance, poly(acrylic acid-co-acrylamide)/diatomite composite flocculants (PAAD) were successfully prepared through aqueous solution copolymerization and applied to flocculate from oil-field fracturing waste-water. The structure of PAAD was characterized by Fourier transform infra-red spectroscopy , 13C nuclear magnetic resonance ...
-
Effect of flocculant on microbial populations and function in Chem-Bioflocculation (CBF) treatment process using PCR-DGGE
The group-specific primers were applied to investigate microbial communities in Chem-Bioflocculation (CBF) reactor by PCR-DGGE method. α-proteobacteria, β-proteobacteria, actinomycetes and acidobacterium, were analysed by using diversity index at different dosage of Polyaluminium Ferric Chloride (PAFC) based on DGGE patterns. Clustering analysis showed that community structure of specific ...
-
Flocculation of a lactic acid fermentation broth by gelatin
In the current study, flocculation of a lactic acid (LA) fermentation broth with three kinds of flocculants was performed in order to reduce membrane pollution during its subsequent electrodialysis. Gelatin was selected as the most suitable flocculant in comparison with others in terms of flocculation rate (FR), suspended solid (SS) removal rate, and filtration flux of the supernatant. Optimal ...
-
Flocculating and dewatering performance of hydrophobic and hydrophilic solids using a thermal-sensitive copolymer
Thermal-sensitive polymers have been tested on settling, compacting or dewatering of clays or oil sand tailings. However, not much attention has been paid to explore the effect of temperature on flocculating performance using thermal-sensitive polymers. In this study, poly(NIPAM-co-DMAPMA) was synthesized and employed to investigate the flocculating and re-flocculating performance of ...
-
Die Casting
A sample of wastewater was received from firm in the south central region of the US. The client could not get sufficient flocculation, despite using 10 lbs. of another dry flocculating material. The sample had an initial pH of 6.5. The sample contained glycol, mineral oil emulsion, wax polymers and soap for cleaning the floor. The sample was flocculated with Floccin K. The material formed a ...
-
Flocculation kinetics mechanism and floc formation prepared by poly aluminum chloride coupled with polyacrylamide for ship ballast water
The performance of flocculants prepared by poly aluminum chloride (PAC) and polyacrylamide (PAM) on treating ballast water collected at the Dalian new port area, the evaluation depending on the values of reaction parameters, and kinetics mechanism of flocculation were investigated in this study. Accordingly, the flocculants of 0.1 g·L−1, prepared by mixing PAC of 10% with PAM of 2.0‰, enabled ...
-
Using PAC-modified clays to control black-bloom-induced black suspended matter in Lake Taihu: deposition and resuspension of black matter/clay flocs
Flocculation using modified clays is a technique widely applied in the management of harmful algal blooms (HABs). Polyaluminum chloride (PAC) modified clay is an efficient flocculating agent in HAB control; however its effectiveness in black bloom management is still largely unknown. In the present study, PAC-modified clay was used to flocculate a black bloom under simulated flows. The ...
-
Coagulation, flocculation and agglomeration
Agglomeration Agglomeration refers to the formation of more or less firmly bound primary particles by collision processes between primary particles, primary particles and agglomerates, as well as pre-existing agglomerates. The agglomeration consists of a destabilization and a transport process. The destabilization is divided into coagulation and flocculation. In general, both mechanisms occur ...
-
Extraction, characterization and application of malva nut gum in water treatment
In view of green developments in water treatment, plant-based flocculants have become the focus due to their safety, degradation and renewable properties. In addition, cost and energy-saving processes are preferable. In this study, malva nut gum (MNG), a new plant-based flocculant, and its composite with Fe in water treatment using single mode mixing are demonstrated. The result presents a ...
-
Project - WTP Helsinki, Finland
Plant: WTP Helsinki, Finland Contractor: Skanska Infra, Helsinki, Finland Type of plant: Municipal Treatment Plant Start-up: 2017 Application: Suspension & Homogenization in a Flocculation Basin Scope of supply: 18 HYPERCLASSIC - Mixers Evolution 7 3 CYBERPITCH - Mixers ...
-
Hydrodynamic evaluation of the influence of outlet configuration for mechanical flocculation facilities
This paper focuses on hydrodynamic research aiming at the short-circuit evaluation of five different outlet configurations through the compartments of a mechanical flocculation unit of vertical shaft with mixing paddles at pilot scale. The tests were carried out with two, three and four compartments, variable and constant velocity gradients, including alternating senses of paddle rotation ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you