Analysis of Membrane and Cake Layer Resistances in Coagulation: Constant Flux Dead-End Microfiltration of NOM

Raspati, Gema Sakti; Meyn, Thomas; Leiknes, TorOve

doi:10.1080/01496395.2013.805225

Cited by 9 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the flux decline behaviors are examined in constant pressure filtration, the pressure rising behaviors resulting from the increase in the filtration resistance are investigated in constant rate filtration in which the filtration rate is kept constant (Blankert et al, 2006;Liu and Kim, 2008;Sun et al, 2008;Mahdi and Holdich, 2013;Raspati et al, 2013).…”

Section: Blocking Filtration Equations For Constant Rate Filtrationmentioning

confidence: 99%

Developments of Blocking Filtration Model in Membrane Filtration

Iritani

Katagiri

2016

KONA

121

View full text Add to dashboard Cite

Blocking filtration laws consist of four different filtration mechanisms: complete blocking, standard blocking, intermediate blocking, and cake filtration. Blocking filtration laws for describing both the pore blocking and cake formation have been extensively employed over the past several decades to evaluate the increase in filtration resistance with the progress of filtration in the field of classical particulate filtration. In recent years, blocking filtration laws become widely used also in membrane filtration such as microfiltration and ultrafiltration of colloids. This paper gives an overview of the developments of blocking filtration laws and equations under constant pressure and constant rate conditions reported for the filtrate flow of Newtonian and non-Newtonian fluids. The fouling index evaluating the degree of membrane fouling was examined on the basis of the blocking filtration equations. The blocking filtration laws were reexamined to extend the range of their application. Moreover, various combined models developed based on the blocking filtration laws were introduced for describing more rigorously the complicated filtration behaviors controlled by more than one mechanism which occurs successively or simultaneously.

show abstract

Section: Blocking Filtration Equations For Constant Rate Filtrationmentioning

confidence: 99%

Developments of Blocking Filtration Model in Membrane Filtration

Iritani

Katagiri

2016

KONA

121

View full text Add to dashboard Cite

show abstract

“…In addition, it can be also found that the TOC removal ratio increased in the first hour of filtration, then it maintained constant for the rest 3 h filtration in SA solution, while it kept almost constant (~50%) for all 4 h filtration in TA solution. Such performance was different from dead-end UF filtration, where the foulants could form a cake layer and constrain the pathway of organics resulting in an increased filtration resistance and organics removal [ 40 , 41 ]. This suggested that the rotating membrane could generate the shear stress to prevent membrane fouling and it is also effective for organic removal for long time operations.…”

Section: Resultsmentioning

confidence: 99%

Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment

Huang

Liu

et al. 2021

Membranes

View full text Add to dashboard Cite

The combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both fouling control and organic removal of macro (sodium alginate, SA) and micro organic matters (tannic acid, TA) was studied comprehensively to evaluate its applicability in drinking water treatment. The results indicated that membrane rotation could generate shear stress and vortex, thus effectively reducing membrane fouling of both SA and TA solutions, especially for macro SA organics. With additional coagulation, the membrane fouling could be further reduced through the aggregation of mediate and macro organic substances into flocs and elimination by membrane retention. For example, with the membrane rotation speed of 60 r/min, the permeate flux increased by 90% and the organic removal by 35% in SA solution, with 40 mg/L coagulant dosage, with an additional 70% increase of flux and 5% increment of organic removal to 80% obtained. However, too much shear stress could intensify the potential of fiber breakage at the potting, destroying the flocs and resulting in the reduction of permeate flux and deterioration of effluent quality. Finally, the combination of coagulation and membrane rotation would lead to the shaking of the cake layer, which is beneficial for fouling mitigation and prolongation of membrane filtration lifetime. This study provides useful information on applying the combined process of conventional coagulation and the hydrodynamic shear force for drinking water treatment, which can be further explored in the future.

show abstract

“…Moreover, it gives detailed information about the type of fouling and how to eradicate either by changing the in uent properties or operating conditions to enhance the performance of membrane ltration. Hermia model is based on Darcy's to analyze the permeate ux in terms of TMP and gives the knowledge about blocking mechanism [33]. The main fouling mechanism can be con rmed based on the relevant standard error by calculating the experimental data using Hermia model reformulated equations is shown in Table 2 [33].…”

Section: Fouling Mechanismmentioning

confidence: 99%

Enhanced Removal of Organic and Inorganic Pollutants using Electrooxidation Integrated Membrane Bioreactor (IMBR) and validation through Lumped Parameter Kinetic modelling with thermodynamic parameter exploration in Pharmaceutical Wastewater Treatment

Palani¹,

Saravanakumar

Natesan

2022

Preprint

View full text Add to dashboard Cite

The occurrence of fouling in Membrane Bioreactors (MBRs).reduces the performance of the system can be overcome by integrating electro-oxidation process in which different applied current density (CD) have been investigated. The optimal CD was 0.748 A/m2 which was suitable for the long-time operation of IMBR and observed that the removal percentile for total organic compounds (TOC), chemical oxygen demand (COD) was above 90% with total dissolved solids (TDS) of 60% at 400kPa constant pressure. Scanning electron micrographs (SEM) showed less void volume and pore constriction and the increase in permeate flux was 45% with extended backwashing time of 140 minutes. The fouling mechanism also verified by Hermia models, lumped parameter kinetic modelling and thermodynamic parameter with activation energy estimation exhibits lesser internal fouling of standard error 0.00459, 58.296 kJ/mol, − 0.1191 kJ/mol, 94.621 kJ/mol, 52.428 kJ/mol and the observed results and more reliable and feasible. The most striking observations in this study were that IMBR can be operated without the problem of filamentous bulking, and electro-oxidation significantly alternated the structural and morphological sludge flocs. The results implied that electro-oxidation might be the key factor for the success in fouling mitigation in IMBR.

show abstract

Analysis of Membrane and Cake Layer Resistances in Coagulation: Constant Flux Dead-End Microfiltration of NOM

Cited by 9 publications

References 28 publications

Developments of Blocking Filtration Model in Membrane Filtration

Developments of Blocking Filtration Model in Membrane Filtration

Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment

Enhanced Removal of Organic and Inorganic Pollutants using Electrooxidation Integrated Membrane Bioreactor (IMBR) and validation through Lumped Parameter Kinetic modelling with thermodynamic parameter exploration in Pharmaceutical Wastewater Treatment

Contact Info

Product

Resources

About