State-of-the-Art and Opportunities for Forward Osmosis in Sewage Concentration and Wastewater Treatment

Wu, Xing; Lau, Cher Hon; Pramanik, Biplob Kumar; Zhang, Jianhua; Xie, Zongli

doi:10.3390/membranes11050305

Cited by 18 publications

(7 citation statements)

References 124 publications

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“…It is interesting to comment that a combination of FO and anaerobic digestion for sewage treatment has also been addressed in the form of FO-based anaerobic membrane bioreactors (FOAn-MBR) [43,44]. However, depending on the way a reactor is operated, performance may be limited by the low organic matter concertation of the feed [18]. Then, the combination of membrane-based preconcentration and anaerobic digestion would still present advantages that should sustain future research oriented to the development of this alternative.…”

Section: Resultsmentioning

confidence: 99%

“…It has gathered increasing attention during the last decade as an alternative for traditional pressure-driven membrane processes, such as reverse osmosis (RO) or nanofiltration (NF). Recently, it has also been proposed as an alternative for sewage treatment or pre-concentration [18]. Osmosis is a natural process that promotes the transport of water between two fluids presenting different osmotic potentials, separated by a selective membrane: the feed and a draw solution.…”

Section: Introductionmentioning

confidence: 99%

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Biogas Production from Concentrated Municipal Sewage by Forward Osmosis, Micro and Ultrafiltration

et al. 2022

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Direct application of anaerobic digestion to sewage treatment is normally only possible under tropical weather conditions. This is the result of its diluted nature and temperatures far from those suitable for anaerobic conversion of organic matter. Then, direct application of anaerobic treatment to sewage would require changing temperature, concentration, or both. Modification of sewage temperature would require much more energy than contained in the organic matter. Then, the feasible alternative seems to be the application of a pre-concentration step that may be accomplished by membrane filtration. This research studied the pre-concentration of municipal sewage as a potential strategy to enable the direct anaerobic conversion of organic matter. Three different membrane processes were tested: microfiltration, ultrafiltration and forward osmosis. The methane potential of the concentrates was determined. Results show that biogas production from the FO-concentrate was higher, most likely because of a higher rejection. However, salt increase due to rejection and reverse flux of ions from the draw solution may affect anaerobic digestion performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biogas Production from Concentrated Municipal Sewage by Forward Osmosis, Micro and Ultrafiltration

et al. 2022

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“…For the FO-MBR process, there are two functions designated by FO membranes such as wastewater concentration and water recovery or extraction (Wu et al, 2021). The wastewater concentrated by the FO process should be particularly helpful in anaerobic MBR systems because it can retain anaerobes completely in anaerobic bioreactor (Chen et al, 2014;Anjum et al, 2021).…”

Section: Hybrid Fo-mbrmentioning

confidence: 99%

Recent advances of membrane-based hybrid membrane bioreactors for wastewater reclamation

Kim,

Wu,

Jeong

et al. 2024

Front. Membr. Sci. Technol.

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Membrane bioreactor (MBR) is an advanced wastewater treatment technology, which has been established for more than 3 decades. In MBRs, membrane separation allows not only rejecting microorganisms/greater-sized molecules but decoupling hydraulic retention time (HRT) and solid retention time (SRT). Low-pressure driven, porous membranes have been widely used in MBRs, but their performances are mainly limited for wastewater reuse applications. Recently, many attempts have been made to combine desalination technologies to advance hybrid MBR processes for wastewater reclamation. Nanofiltration (NF) and reverse osmosis (RO) have been applied with the MBRs to improve effluent quality, and their advantages and challenges have been well reported in terms of rejection efficiency, operational energy, fouling control and recovery of retentate stream. Alternatively, the direct introduction of non-pressurized desalination technologies such as forward osmosis (FO) and membrane distillation (MD) into MBR processes for wastewater reclamation or probably for microbial activity have been considered substantially due to their low energy consumption and excellent rejection efficiency of solid materials. However, several technical limitations still need to be resolved to commercialize hybrid FO- or MD-MBR processes. This paper reviews recent advances of MBR technology integrated with desalination technologies for wastewater reclamation and suggests perspectives to optimize membrane-based hybrid MBR process.

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“…The advantages of the FO process are low-energy consumption and low concentration polarization on the membrane surface, i.e., lesser membrane fouling than RO [6][7][8]. The FO process has been successfully studied in various applications such as wastewater recovery [9,10], seawater desalination [11], power generation and food processing [5].…”

Section: Introductionmentioning

confidence: 99%

Membrane Fouling Behavior of Forward Osmosis for Fruit Juice Concentration

Huang

et al. 2021

Membranes

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Forward osmosis (FO) technology has a broad application prospect in the field of liquid food concentration because of the complete retention of flavor components and bioactive substances. Membrane fouling is the main obstacle affecting the FO performance and concentration efficiency. This work systematically investigated the membrane fouling behavior of the FO process for fruit juice concentration elucidated by the models of resistance-in-series, xDLVO theory and FTIR analysis. The results show that the AL-FS mode was more suitable for concentrating orange juice. Increasing the cross-flow rate and pretreatment of feed solutions can effectively improve the water flux and reduce the fouling resistance. The ATR-FTIR analysis revealed that the fouling layer of orange juice was mainly composed of proteins and polysaccharides, and the pretreatment of microfiltration can greatly reduce the content of the major foulant. There was an attractive interaction between the FO membrane and orange juice foulants; by eliminating those foulants, the microfiltration pretreatment then weakened such an attractive interaction and effectively prevented the fouling layer from growing, leading to a lower process resistance and, finally, resulting in a great improvement of concentration efficiency.

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State-of-the-Art and Opportunities for Forward Osmosis in Sewage Concentration and Wastewater Treatment

Cited by 18 publications

References 124 publications

Biogas Production from Concentrated Municipal Sewage by Forward Osmosis, Micro and Ultrafiltration

Biogas Production from Concentrated Municipal Sewage by Forward Osmosis, Micro and Ultrafiltration

Recent advances of membrane-based hybrid membrane bioreactors for wastewater reclamation

Membrane Fouling Behavior of Forward Osmosis for Fruit Juice Concentration

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