Bathroom greywater recycling using polyelectrolyte-complex bilayer membrane: Advanced study of membrane structure and treatment efficiency

Oh, Kai Siang; Poh, Phaik Eong; Chong, Meng Nan; Chan, Eng Seng; Lau, Ee Von; Saint, Christopher P.

doi:10.1016/j.carbpol.2016.04.039

Cited by 33 publications

(13 citation statements)

References 25 publications

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“…It is a soluble microbial metabolite termed as soluble microbial product (SMP). EPS and SMP levels are typically characterized by CODcr, TOC, UV254 or directly by protein, polysaccharide and humic acid content [94].…”

Section: Effect Of Eps and Smp On Membrane Foulingmentioning

confidence: 99%

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

et al. 2020

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Compared with the traditional activated sludge process, a membrane bioreactor (MBR) has many advantages, such as good effluent quality, small floor space, low residual sludge yield and easy automatic control. It has a promising prospect in wastewater treatment and reuse. However, membrane fouling is the biggest obstacle to the wide application of MBR. This paper aims at summarizing the new research progress of membrane fouling mechanism, control, prediction and detection in the MBR systems. Classification, mechanism, influencing factors and control of membrane fouling, membrane life prediction and online monitoring of membrane fouling are discussed. The research trends of relevant research areas in MBR membrane fouling are prospected.

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Section: Effect Of Eps and Smp On Membrane Foulingmentioning

confidence: 99%

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

et al. 2020

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“…The application of DMF in treating various types of wastewater has been well documented in the literature (Akbari et al, 2002;Guilbaud et al, 2010;Hey et al, 2018;Kim et al, 2007a;Kim et al, 2007b;Koyuncu, 2003;Lin et al, 2016;Lòpez Zavala et al, 2014;Oh et al, 2016;Ramona et al, 2004;Ravazzini et al, 2005;Šostar-Turk et al, 2005;Woźniak and Prochaska, 2014;Zhao et al, 2019) (See Appendix 1). It is noted that lab-scale research work on this field is greatly progressing, but very limited pilot or full-scale practical application have been reported.…”

Section: Treatment Performance Of Dmfmentioning

confidence: 99%

“…An alternative solution for improvement of DMF performance is to develop new membranes with increased antifouling properties. One reported study focused on developing novel antifouling membranes and the lab-scale testing findings displayed their good performances in membrane fouling alleviation (Oh et al, 2016). However, long-term filtration testing for these novel membranes are still lacking, which indeed is necessary in order to achieve sustainable membrane operation and promote their commercialization.…”

Section: Frontiers Of Research and Gaps In Knowledge Of Dmfmentioning

confidence: 99%

Direct membrane filtration for wastewater treatment and resource recovery: A review

Hube

Eskafi

Hrafnkelsdóttir

et al. 2020

Science of The Total Environment

453

110

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Direct membrane filtration (DMF) of municipal wastewater offers an alternative solution for centralized and decentralized wastewater treatment in Iceland. The efficiency of biologicalbased wastewater treatment is restricted in Iceland, due to low temperatures and high wastewater inflow rates with extremely low concentration of organics. This study aims to investigate membrane fouling mechanisms and mitigation approaches during DMF of municipal wastewater. The DMF experiments were performed using a crossflow flat sheet membrane filtration cell integrated with an optical coherence tomography (OCT) imaging system. The effects of membrane material, operation conditions and cleaning protocol on DMF performance and foulant composition were examined. The threshold flux testing results indicated that a PVDF membrane (0.08 μm) was suitable for DMF of wastewater. Increasing crossflow velocity, physical flushing frequency and flushing water temperature contributed greatly to mitigate fouling. During a continuous DMF process, reversible fouling was predominant, while during intermittent DMF with periodical physical cleaning, irreversible/ irremovable fouling was dominant. A possible shift of tightly attached cake layer to irreversible/ irremovable fouling was revealed by the direct observation of fouling via OCT. The foulants autopsy indicated that a combination of organic and inorganic foulants was attributed to membrane fouling, instead of biological fouling. Under the optimized filtration condition, sustainable long-term DMF operation (~230 h) was achieved by employing a combination of periodical physical flushing with chemical-enhanced flushing. The water quality analysis showed that the DMF process could efficiently remove solids and greater-sized soluble organics, allowing the treated water to meet wastewater discharge standards.

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“…The primary reason of such exploration is due to formation of polyelectrolyte complex (PEC) between positively charged CS and negatively charged AL [22][23][24]. It is difficult for CS and AL to stand alone as a membrane due to hydrophilicity of AL and dense structure to CS that complicates filtration process [25][26][27]. However, interaction of CS and AL reduces the hydrophilicity of AL and forms insoluble PEC membrane [25,26].…”

Section: Introductionmentioning

confidence: 99%

Fabrication technique of composite chitosan/alginate membrane module for greywater treatment

Nalatambi

Yoon

2021

J. Phys.: Conf. Ser.

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A novel chitosan/alginate composite membrane is proposed for the application of greywater treatment. In particular, the effect of stirring speed of mixing chitosan and alginate solution was investigated in this study. The study revealed that 150CSAL and 210CSAL membranes swell significantly compared to CS membrane due to the porous structure of composite membrane. The FTIR spectra revealed that the mixing speed has no influence in terms of molecular interaction between CS and AL due to fixed CS and AL concentrations used in this study. On the other hand, the complexation of AL with CS made outstanding improvement to the dense structure of CS where 180CSAL membrane has UP water flux as high as 90 L/m2h at 2 bar. All membranes have the capability to remove the pollutants present in GW and the COD removal was further improved up to 7% using CSAL membranes. In addition, increasing mixing speed improved the pathogen removal efficiency compared to CS membrane. The treated GW met the non-potable GW reuse standard for turbidity<5 NTU and TSS<20 mg/L. To summarize, the proposed fabrication technique on CSAL membrane showed improved characteristics to CS membrane and has significant performance on GW treatment.

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Bathroom greywater recycling using polyelectrolyte-complex bilayer membrane: Advanced study of membrane structure and treatment efficiency

Cited by 33 publications

References 25 publications

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

A Review on the Mechanism, Impacts and Control Methods of Membrane Fouling in MBR System

Direct membrane filtration for wastewater treatment and resource recovery: A review

Fabrication technique of composite chitosan/alginate membrane module for greywater treatment

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