PDMS membranes for feasible recovery of dissolved methane from AnMBR effluents

Sanchis-Perucho, Pau; Robles, Ángel; Durán, Freddy; Ferrer, J.; Seco, A.

doi:10.1016/j.memsci.2020.118070

Cited by 47 publications

(33 citation statements)

References 51 publications

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“…Polydimethylsiloxane (PDMS) membranes are broadly used for the manufacturing of microfluidic devices [1], separation of organics from water [2,3], gas separation [4][5][6][7][8][9], and removing aldehydes from the reactants [10]. Osmotic mass transport across PDMSbased liquid layers has already been implemented for the controlled crystallization of proteins [11,12].…”

Section: Introductionmentioning

confidence: 99%

Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on a Floating Polydimethylsiloxane Membrane

Roy

Shoval

Dombrovsky

et al. 2021

Fluids

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We report a cyclic growth/retraction phenomena observed for saline droplets placed on a cured poly (dimethylsiloxane) (PDMS) membrane with a thickness of 7.8 ± 0.1 µm floating on a pure water surface. Osmotic mass transport across the micro-scaled floating PDMS membrane provided the growth of the sessile saline droplets followed by evaporation of the droplets. NaCl crystals were observed in the vicinity of the triple line at the evaporation stage. The observed growth/retraction cycle was reversible. A model of the osmotic mass transfer across the cured PDMS membrane is suggested and verified. The first stage of the osmotic growth of saline droplets is well-approximated by the universal linear relationship, whose slope is independent of the initial radius of the droplet. The suggested physical model qualitatively explains the time evolution of the droplet size. The reported process demonstrates a potential for use in industrial desalination.

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Section: Introductionmentioning

confidence: 99%

Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on a Floating Polydimethylsiloxane Membrane

Roy

Shoval

Dombrovsky

et al. 2021

Fluids

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“…To avoid the membrane clogging issue, Sethunga et al adopted the lumen side operation with a prefiltered UASB effluent by a filter cloth, thus achieving a higher recovery efficiency [40]. Similarly, Sanchis-Perucho et al filtered an AnMBR effluent with a ultrafiltration membrane prior to feeding to a commercial hollow fiber MC module [41].…”

Section: Influensive Parameters Of Hollow Fiber Mcs For D-ch 4 Recoverymentioning

confidence: 99%

Membrane Contactors for Maximizing Biomethane Recovery in Anaerobic Wastewater Treatments: Recent Efforts and Future Prospect

et al. 2021

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Increasing demand for water and energy has emphasized the significance of energy-efficient anaerobic wastewater treatment; however, anaerobic effluents still containing a large portion of the total CH4 production are discharged to the environment without being utilized as a valuable energy source. Recently, gas–liquid membrane contactors have been considered as a promising technology to recover such dissolved methane from the effluent due to their attractive characteristics such as high specific mass transfer area, no flooding at high flow rates, and low energy requirement. Nevertheless, the development and further application of membrane contactors were still not fulfilled due to their inherent issues such as membrane wetting and fouling, which lower the CH4 recovery efficiency and thus net energy production. In this perspective, the topics in membrane contactors for dissolved CH4 recovery are discussed in the following order: (1) operational principle, (2) potential as waste-to-energy conversion system, and (3) technical challenges and recent efforts to address them. Then, future efforts that should be devoted to advancing gas–liquid membrane contactors are suggested as concluding remarks.

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“…In terms of removal air stripping is simple and effective, but the economic benefit from methane gas recovery will decrease (Glória et al, 2016). Hydrophobic, microporous membranes can be used for collecting dissolved methane as a high‐purified methane gas (Cao et al, 2020; Cookney et al, 2016; Li et al, 2020; Sanchis‐Perucho et al, 2020; Velasco et al, 2018), but the cost benefit is questionable due to the expensive cost of methane collection membranes.…”

Section: Dissolved Methanementioning

confidence: 99%

Anaerobic membrane bioreactors for wastewater treatment: Challenges and opportunities

Lee

Liao

2020

Water Environment Research

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Anaerobic membrane bioreactors (AnMBRs) have become a new mature technology and entered into the wastewater market, but there are several challenges to be addressed for wide applications. In this review, we discuss challenges and potentials of AnMBRs focusing on wastewater treatment. Nitrogen and dissolved methane control, membrane fouling and its control, and membrane associated cost including energy consumption are main bottlenecks to facilitating AnMBR application in wastewater treatment. Accumulation of dissolved methane in AnMBR permeate decreases the benefit of methane energy and contributes to methane gas emissions to atmosphere. Separate control units for nitrogen and dissolved methane add system complexity and increase capital and operating and maintenance (O & M) costs in AnMBR-centered wastewater treatment. Alternatively, methane-based denitrification can be an ideal nitrogen control process due to simultaneous removal of nitrogen and dissolved methane. Membrane fouling and energy associated with membrane fouling control are major limitations, in addition to membrane cost. More efforts are required to decrease capital and O & M costs associated with the control of dissolved methane nitrogen and membrane fouling to facilitate AnMBRs for wastewater treatment. © 2020 Water Environment Federation • Practitioner points • AnMBRs can accelerate anaerobic wastewater treatment including dilute wastewater. • Nitrogen and dissolved methane control is detrimental for AnMBR application to wastewater treatment. • Membrane biofilm reactors using gas-permeable membranes are suitable for simultaneous nitrogen and dissolved methane control. • High capital and O & M costs from membranes are a major bottleneck to wide application of AnMBRs. • Dynamic membranes could be an option to reduce capital and O & M costs for AnMBRs.

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PDMS membranes for feasible recovery of dissolved methane from AnMBR effluents

Cited by 47 publications

References 51 publications

Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on a Floating Polydimethylsiloxane Membrane

Oscillatory Reversible Osmotic Growth of Sessile Saline Droplets on a Floating Polydimethylsiloxane Membrane

Membrane Contactors for Maximizing Biomethane Recovery in Anaerobic Wastewater Treatments: Recent Efforts and Future Prospect

Anaerobic membrane bioreactors for wastewater treatment: Challenges and opportunities

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