Influence of sludge rheological properties on the membrane fouling in submerged membrane bioreactor

Azami, Hamed; Sarrafzadeh, Mohammad‐Hossein; Mehrnia, Mohammad Reza

doi:10.5004/dwt.2011.2852

Cited by 18 publications

(8 citation statements)

References 16 publications

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“…According to both studies, the increase in MLSS mainly exhibited a negative influence on the average permeability. This effect could be explained by the fact that elevated MLSS content tends to induce severe reversible fouling, high ML viscosity and the production of biopolymers [102][103][104]. The current research together with the study by Kulesha et al [42] also revealed that the reduction of COD positively contributes to fouling mitigation.…”

Section: Discussionsupporting

confidence: 58%

Strategy for Flux Enhancement in Biofilm Ceramic Membrane Bioreactor Applying Prepolymerized and Non-Prepolymerized Inorganic Coagulants

Kulesha

Maletskyi

Kvaal

et al. 2019

Water

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Considering new legislative and economic restrictions caused by the water crisis, this work focuses on a more efficient wastewater treatment process, which combines biological treatment in a moving bed biofilm system with a membrane bioreactor (BF-MBR) and coagulation, particularly addressing fouling alleviation in the separation stage. The study justifies the positive impact of coagulant dosing in BF-MBR regarding membrane flux and fouling rate. Statistical techniques connect the results of coagulation and membrane separation experiments with properties of mixed liquor, obtained after biotreatment in the representative pilot plant and characteristics of prepolymerized and non-prepolymerized inorganic coagulants. Research results substantiate the need for a pH-controlled coagulation of mixed liquor in BF-MBR depending on coagulant type, which influences charge, hydrophobicity and size of flocs and organic content of the system. It is suggested, that the adsorption/charge neutralization mechanism dominates in flux enhancement in BF-MBR, giving the best results in the case of prepolymerized aluminium coagulants. Together with high quality of permeate, the application of prepolymerized aluminium chloride of medium basicity entails a tenfold increase in filtration time of the membrane separation cycle and increases net membrane flux by 30–56%. The results of the study are practically significant for the development of an automated control system for BF-MBR, optimizing treatment rates together with membrane separation efficiency.

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Section: Discussionsupporting

confidence: 58%

Strategy for Flux Enhancement in Biofilm Ceramic Membrane Bioreactor Applying Prepolymerized and Non-Prepolymerized Inorganic Coagulants

Kulesha

Maletskyi

Kvaal

et al. 2019

Water

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“…Negative (irreversible fouling) MLSS 1 12-18 g/L: The formed cake layer causes the prevention of the pore blocking development and induces an increased porosity of the cake layer. [15,45] COD 4 Positive COD 4 in the form of colloids proteins (adsorption mechanism) and other soluble organic fractions, causing irreversible fouling; higher organic load causes an increase in the production of specific EPS 3 and macromolecules in the SMP 2 /EPS 3 fractions, deflocculation of the mixed liquor, and a fast formation of cake layers. [9,29,35,[52][53][54][55][56] RH 6 (mostly hydrophilic membranes) Negative RH 6 increase: Enhanced AS 5 flocculation due to more intense hydrophobic interactions between sludge flocs, resulting in the formation of larger aggregates with less water content, and decreased interaction between the flocs and membrane surface.…”

Section: Mlssmentioning

confidence: 99%

Multivariate Chemometric Analysis of Membrane Fouling Patterns in Biofilm Ceramic Membrane Bioreactor

Kulesha

Maletskyi

Ratnaweera

2018

Water

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Membrane fouling highly limits the development of Membrane bioreactor technology (MBR), which is among the key solutions to water scarcity. The current study deals with the determination of the fouling propensity of filtered biomass in a pilot-scale biofilm membrane bioreactor to enable the prediction of fouling intensity. The system was designed to treat domestic wastewater with the application of ceramic microfiltration membranes. Partial least squares regression analysis of the data obtained during the long-term operation of the biofilm-MBR (BF-MBR) system demonstrated that Mixed liquor suspended solids (MLSS), diluted sludge volume index (DSVI), chemical oxygen demand (COD), and their slopes are the most significant for the estimation and prediction of fouling intensity, while normalized permeability and its slope were found to be the most reliable fouling indicators. Three models were derived depending on the applied operating conditions, which enabled an accurate prediction of the fouling intensities in the system. The results will help to prevent severe membrane fouling via the change of operating conditions to prolong the effective lifetime of the membrane modules and to save energy and resources for the maintenance of the system.

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“…Operasional teknologi FCR pada lumpur aktif dengan kadar MLSS yang tersuspensi lebih rendah memerlukan energi pengadukan yang lebih rendah dari pada teknologi OD dengan MLSS yang lebih tinggi yang berarti lebih kental. MLSS dan kekentalan (viskositas) mempunyai korelasi eksponensial, sedangkan penelitian sebelumnya menunjukkan korelasi yang linier yang diikuti korelasi eksponensial [18]. iii.…”

Section: Gambar 5 Grafik Konsumsi Energi Pada Teknologi Od Dibandingunclassified

Reduksi Energi Pengolahan Air Limbah di Kawasan Industri Dengan Implementasi Teknologi Food Chain Reactor (Studi Kasus : Kawasan Industri Jababeka Bekasi)

Wikaningrum

Hakiki

2020

JSE

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Biological-aerobic process is a technology that is often chosen to treat wastewater in industrial areas, especially industries related to food industries. Compared to chemical treatment and advanced treatment, biological treatment is relatively more efficient in the costs required. However, in conventional biological treatment the amount of energy consumption in the process is a major cost component that it becomes one of the challenges in implementing this technology. This paper contains a review of the implementation of the Food Chain Reactor (FCR) technology in treating industrial area wastewater, focusing on an overview of energy consumption compared to conventional biological-aerobic treatment of oxidation ditch (OD). FCR is a wastewater treatment plant (IPAL) that combines Integrated Fixed Film Activated Sludge (IFAS) technology and technology that resembles Constructed Wetland, thus enabling the simultaneous physical, biological and biochemical treatment processes within the reactor. In this case study, the implementation succeeded in showing a reduction in energy consumption by 46.4% while maintaining an efficiency decrease in BOD by 83% and efficiency in decreasing ammonia by 82%. As with the OD process, in this FCR study showed that the denitrification process has not been successful.

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Influence of sludge rheological properties on the membrane fouling in submerged membrane bioreactor

Cited by 18 publications

References 16 publications

Strategy for Flux Enhancement in Biofilm Ceramic Membrane Bioreactor Applying Prepolymerized and Non-Prepolymerized Inorganic Coagulants

Strategy for Flux Enhancement in Biofilm Ceramic Membrane Bioreactor Applying Prepolymerized and Non-Prepolymerized Inorganic Coagulants

Multivariate Chemometric Analysis of Membrane Fouling Patterns in Biofilm Ceramic Membrane Bioreactor

Reduksi Energi Pengolahan Air Limbah di Kawasan Industri Dengan Implementasi Teknologi Food Chain Reactor (Studi Kasus : Kawasan Industri Jababeka Bekasi)

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