4.4 Advanced Monitoring of Membrane Fouling and Control Strategies

Sim, Lee Nuang; Fane, Anthony G.

doi:10.1016/b978-0-12-409547-2.12226-7

Cited by 1 publication

(3 citation statements)

References 157 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Long wavelength light is used, which can penetrate deep into the examined medium while photodetectors capture the reflected signal. The basic principle is shown in Figure 11 (Brezinski, 2006;Sim and Fane, 2017). As OCT can be conducted in situ, it allows direct observation of membrane filtration in a non-invasive and non-destructive mode (Dreszer et al, 2014).…”

Section: Fouling Observation Via Octmentioning

confidence: 99%

“…The scans provide information on the dynamic thickness and structure of the fouling layer (growth and detachment of the biofilm) during the filtration. Thus, precise information about cake layer properties can be attained, such as coverage or specific depositions, without disturbing the process (Dreszer et al, 2014;Sim and Fane, 2017).…”

Section: Fouling Observation Via Octmentioning

confidence: 99%

“…Figure 11. Basic principle of Fourier-domain OCT of fouling process in a membrane filtration cell (Sim and Fane, 2017) 3.6 Analysis of Water Quality and Foulants Characteristics…”

Section: Fouling Observation Via Octmentioning

confidence: 99%

See 2 more Smart Citations

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

Hube

Eskafi

Hrafnkelsdóttir

et al. 2020

Science of The Total Environment

407

110

View full text Add to dashboard Cite

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.

show abstract

Section: Fouling Observation Via Octmentioning

confidence: 99%

Section: Fouling Observation Via Octmentioning

confidence: 99%