A comprehensive study on membrane fouling in submerged membrane bioreactors operated under different aeration intensities

Meng, Fangang; Yang, Fenglin; Shi, Baoqiang; Zhang, Hanmin

doi:10.1016/j.seppur.2007.05.040

Cited by 210 publications

(98 citation statements)

References 54 publications

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“…However, a major challenge to the applications of membrane technology at different scales is fouling, which causes a great reduction in the productivity, leading to a severe filtration flux decline [2]. Membrane fouling is a complex issue [3].…”

Section: Introductionmentioning

confidence: 99%

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Xiao

Zhang

et al. 2013

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Xiao

Zhang

et al. 2013

Journal of Membrane Science

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“…In particular, low pressure membranes (LPMs) which are operated at relatively low transmembrane pressures (TMPs, less than 100-200 kpa, typically) with nominal pore sizes of 10-200 nm are becoming more attractive for the drinking water works in China due to various reasons, such as the strict regulatory requirements for the effluent quality, operation easiness, limited footprints and competitive cost [4,5]. However, an important challenge to the applications of LMPs at different scales is the membrane fouling which causes a great reduction in the membrane productivity, leading to a severe filtration flux decline [6]. Therefore, it is important to identify the foulants on the membrane, especially the composition of natural organic matters (NOMs) of the foulants.…”

Section: Introductionmentioning

confidence: 99%

Investigation of organic foulants behavior on hollow-fiber UF membranes in a drinking water treatment plant

Xiao

Wang

et al. 2012

Separation and Purification Technology

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a b s t r a c tIn the present work, a ultrafiltration (UF) low pressure membrane (LPM) made of polyvinyl chloride (PVC) was used with an inline poly-ferric sulfate coagulation in a full scale drinking water treatment plant. The organic foulants and their accumulation behavior in the membrane filtration were investigated during a whole year operation. The evolutions of the surface morphology of the membranes were characterized by scanning electronic microscopy (SEM) and atomic force microscopy (AFM). The results revealed that the cake layer and pore blocked were responsible for the flux declining. Moreover, the roughness of the surface of the membranes continuously increased with the filtration. In order to identify the constitutes of organic foulants, attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), high pressure size exclusion chromatography (HPSEC) and fluorescence excitation-emission matrix (EEM) spectrometry were used to examine the desorbed organic matters from the fouled membranes. The results showed that humic substances kept a very stable situation, indicating that it would not be important in the formation of the combined organic fouling layer. Protein/protein-like substances and soluble microbial product-like (SMP-like) substances were the dominant components in the organic fouling layer in a long-term ultrafiltration of surface water used as a drinking water source. A decrease of protein/protein-like substances and an increase of SMP-like substances with the filtration time were found, which could be attributed to the transition from proteins to SMP in the fouling layer. Thus, the increase of SMP-like substances in the fouling layer would play a significant role on the accumulation of irreversible fouling.

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“…Zhang et al (2015), on the other hand, applied an aeration intensity equal to 1 m 3 /h to maintain 2 ppm dissolved oxygen concentration in the SMEBR. Large aeration intensity, greater than 800 L/h, was observed to be harmful for microbial growth and may cause break down of floc's formation which promotes the release of colloids and solutes resulting in severe pore blocking (Meng et al, 2008). ↑Current Density = ↓ sludge conductivity, ↑ settleability, ↓ SVI, ↓ SMP, ↑Flocs size, ↑ electrophoresis, Tafti The effects of HRT and sludge properties (SRT and MLSS) in wastewater treatment using eMBR were explored by .…”

Section: Operating Conditionsmentioning

confidence: 99%

Combination of Electrochemical Processes with Membrane Bioreactors for Wastewater Treatment and Fouling Control: A Review

Ensano

Borea

Naddeo

et al. 2016

Front. Environ. Sci.

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This paper provides a critical review about the integration of electrochemical processes into membrane bioreactors (MBR) in order to understand the influence of these processes on wastewater treatment performance and membrane fouling control. The integration can be realized either in an internal or an external configuration. Electrically enhanced membrane bioreactors or electro membrane bioreactors (eMBRs) combine biodegradation, electrochemical and membrane filtration processes into one system providing higher effluent quality as compared to conventional MBRs and activated sludge plants. Furthermore, electrochemical processes, such as electrocoagulation, electrophoresis, and electroosmosis, help to mitigate deposition of foulants into the membrane and enhance sludge dewaterability by controlling the morphological properties and mobility of the colloidal particles and bulk liquid. Intermittent application of minute electric field has proven to reduce energy consumption and operational cost as well as minimize the negative effect of direct current field on microbial activity which are some of the main concerns in eMBR technology. The present review discusses important design considerations of eMBR, its advantages as well as its applications to different types of wastewater. It also presents several challenges that need to be addressed for future development of this hybrid technology which include treatment of high strength industrial wastewater and removal of emerging contaminants, optimization study, cost benefit analysis and the possible combination with microbial electrolysis cell for biohydrogen production.

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A comprehensive study on membrane fouling in submerged membrane bioreactors operated under different aeration intensities

Cited by 210 publications

References 54 publications

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Investigation of organic foulants behavior on hollow-fiber UF membranes in a drinking water treatment plant

Combination of Electrochemical Processes with Membrane Bioreactors for Wastewater Treatment and Fouling Control: A Review

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