Computer simulation of the flocculation of suspended solids

Smoczyński, L.; Mróz, Patrycja; Wardzyńska, R.; Załęska-Chróst, B.; Dłużyńska, K.T.

doi:10.1016/j.cej.2009.04.020

Cited by 13 publications

(6 citation statements)

References 20 publications

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“…The above leads to a decrease in electric potential in the Stern layer, and in the electrokinetic zeta potential. The forces of electrostatic repulsion between colloidal particles decrease, latent and slow coagulation begins [8], and flocs of post-coagulation sludge are formed in the system. Cations may appear in the adsorption layer if coagulant dose is further increased.…”

Section: Resultsmentioning

confidence: 99%

“…Aluminum and iron(III) cations found in the most commonly applied inorganic coagulants [2][3][4][5][6], PAC (PACl) and PIX, are used for primary coagulation of negatively charged wastewater colloids. Aggregation and flocculation are the result of processes in which particles formed during latent coagulation are combined into larger agglomerates-flocs [7,8]. In the process of wastewater coagulation [9,10], the key problem is the choice of coagulant and the precise determination of its optimum dose [11][12][13].…”

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confidence: 99%

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Destabilization Of Model Wastewater In The Chemical Coagulation Process

Smoczyński

Muńska

Kosobucka

et al. 2014

Ecological Chemistry and Engineering S

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This paper discusses the results of laboratory analyses of the coagulation and flocculation of model wastewater. The investigated wastewater was susceptible to treatment by chemical coagulation. The effectiveness of two commercial coagulants, PAC produced at the DEMPOL-ECO Chemical Plant and PIX manufactured by KEMIPOL, was compared. A mathematical model relying on a second-degree polynomial was used to describe and analyze experimental data. In each case, the parabola minimum point was a precisely determined coagulant dose, regarded as the optimal dose. The application of a coagulant dose higher than the optimal dose reduced the effectiveness of wastewater treatment by coagulation. A detailed analysis of turbidity, suspended solids, total phosphorus and pollutant removal measured by the COD test revealed that PAC was a more effective and a more efficient coagulant than PIX. The risk of coagulant overdosing was greater with the use of PAC than PIX.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Destabilization Of Model Wastewater In The Chemical Coagulation Process

Smoczyński

Muńska

Kosobucka

et al. 2014

Ecological Chemistry and Engineering S

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“…A popular view that phosphates are precipitated or co-precipitated as AlPO 4 ↓, or FePO 4 ↓ should be verified to account for the competitive precipitation of aluminum and iron(III) hydroxides. The coagulation-flocculation [15] of compounds responsible for COD in wastewater is regarded the product of two different processes:…”

Section: _________________________mentioning

confidence: 99%

Phosphorus and COD removal from chemically and electrochemically coagulated wastewater

Smoczyński¹,

Muńska²,

Kosobucka³

et al. 2014

Environ. Protect. Eng.

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Wastewater coagulation and electrocoagulation were investigated as sorption processes involving colloidal sorbents such as (Al(OH) 3) n , (Fe(OH) 3) m and (Fe(OH) 2) p. An attempt was made to fit experimental data to two popular sorption models. Based on a statistical and mathematical analysis of the obtained results, the Langmuir model of chemical adsorption was regarded more probable than the Freundlich model. The highest maximum adsorption of phosphorus in the analyzed wastewater was achieved with the use of PIX, and the lowest adsorption maxima were reported for an iron electrocoagulant. PAC was most effective in reducing COD of wastewater. PAC and PIX delivered higher adsorption maxima for compounds responsible for COD than aluminum and iron electrocoagulants.

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“…As part of the latter approach, the rate and efficiency of new inorganic coagulants and organic flocculants parameters are examined in a wastewater treatment plant [8,9]. Studies of coagulation, flocculation and sedimentation processes are usually carried out in natural systems, such as wastewater [10], model systems like silica suspensions [1,11,12], as well as computer-simulated systems [13][14][15][16]. The results of computer simulations support the development of fundamental databases, and the resulting conclusions render them an important supplement to applied research.…”

Section: Introductionmentioning

confidence: 99%

Computer Simulation of Chemical Coagulation and Sedimentation of Suspended Solids

Wardzyńska

Smoczyński

Załęska-Chróst

2018

Ecological Chemistry and Engineering S

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The computer program ZB2 was used to study simulated coagulation rate for the system containing spherical sol particles and spherical coagulant particles. The system performance was verified to the particle-cluster model of a fast and perikinetic coagulation process that fulfils Smoluchowski and/or Muller equations. The rate of the coagulation process satisfied both the kinetic equation of a first-order reaction and a second-order reaction. However, chosen concepts and models in the theory of bidispersive sol coagulation have been negatively verified. Also, attempts have been made to modify the Muller integral equation for selected boundary conditions.

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Computer simulation of the flocculation of suspended solids

Cited by 13 publications

References 20 publications

Destabilization Of Model Wastewater In The Chemical Coagulation Process

Destabilization Of Model Wastewater In The Chemical Coagulation Process

Phosphorus and COD removal from chemically and electrochemically coagulated wastewater

Computer Simulation of Chemical Coagulation and Sedimentation of Suspended Solids

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