Performance of a polypropylene membrane contactor for the recovery of dissolved methane from anaerobic effluents: Mass transfer evaluation, long-term operation and cleaning strategies

Henares, M.; Ferrero, Pablo; San‐Valero, Pau; Martínez‐Soria, Vicente; Izquierdo, Marta

doi:10.1016/j.memsci.2018.06.045

Cited by 61 publications

(36 citation statements)

References 39 publications

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“…However, in D-CH 4 recovery, the residual pollutants such as suspended solids and organics in the feed solution should also be considered together during the selection of the flow configuration. For example, Cookney et al, Henares et al, and Rongwong et al supplied the liquid to the shell side for the high organic content anaerobic effluents such as UASB and vice versa for low organic-containing effluents such as AnMBR [13,[37][38][39]. Even though the lumen side operational mode offers the better CH 4 recovery efficiency, a higher risk of membrane clogging limits such operation mode.…”

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

confidence: 99%

“…The rates of recovery were recorded as 92.6% and 98.9% for the nonporous and microporous membranes, respectively. In a subsequent study, Henares et al demonstrated the limitation of the microporous membranes due to membrane fouling and wetting during a prolonged operation and thus recommended intermittent cleaning [37]. Accordingly, several studies have proposed the membrane post treatments or surface modifications to whittle down the wetting and fouling [40].…”

Section: Mass Transfer Coefficientmentioning

confidence: 99%

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

confidence: 99%

Section: Mass Transfer Coefficientmentioning

confidence: 99%

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

et al. 2021

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“…Regarding the long-term operation of membrane contactors, Henares et al (2017Henares et al ( , 2018 reported nonreversible membrane fouling when the EGSB effluent was introduced by the shell side of dense (PDMS) (Henares et al 2017) and microporous (PP) (Henares et al 2018) membrane contactors, probably owing to insufficient pre-treatment (filtration of 40 μm) along with the low flow velocities in this operating mode. When using the membrane contactors with the liquid phase on the lumen side (with higher flow velocities but also higher pressure drops), these authors recommended daily physical cleaning with water in a counter-current for 30 min to maintain the D-CH 4 desorption efficiency with time.…”

Section: Membrane Contactorsmentioning

confidence: 99%

Mitigation of diffuse CH4 and H2S emissions from the liquid phase of UASB-based sewage treatment plants: challenges, techniques, and perspectives

Centeno-Mora

Fonseca

Andreão

et al. 2020

Environ Sci Pollut Res

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Upflow anaerobic sludge blanket (UASB) reactors are considered to be a sustainable and well-established technology for sewage treatment in warm climate countries. However, gases dissolved in the effluent of these reactors, CH 4 and H 2 S in some instances, are a major drawback. These dissolved gases can be emitted into the atmosphere downstream of the anaerobic reactors, resulting in odour nuisance and, in the case of H 2 S, corrosion, while in the case of CH 4 , increasing greenhouse gas emissions with a significant loss of potentially recoverable energy. In this sense, this study aims to provide a critical review of the recent efforts to control CH 4 and H 2 S dissolved in UASB reactor effluents, with a focus on the different available techniques. Different desorption techniques have been tested for the removal/recovery of dissolved CH 4 and H 2 S: diffused aeration, simplified desorption chamber, packed desorption chamber, closed downflow hanging sponge reactor, membrane contactor, and vacuum desorption chamber. Other recent publications addressing the oxidation of these compounds in biological posttreatments with simultaneous nitrification/denitrification of ammonia were also discussed. Additionally, the rationale of CH 4 recovery was determined by energy balance and carbon footprint approaches, and the H 2 S removal was examined by modelling its emission and atmospheric dispersion.

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“…Moreover, they lead to increased mass-transfer coefficients of the required component from one phase to another and, consequently, to compact separation modules [3]. Gas-liquid membrane contactors are already widely used for various applications, including blood oxygenation [4,5], the removal of acid gases (CO 2 , H 2 S, SO 2 ) from gaseous media [6,7], the removal of dissolved gases from liquids [8,9], and the separation of saturated and unsaturated hydrocarbons [10].…”

Section: Introductionmentioning

confidence: 99%

Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes

et al. 2021

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A promising solution for the implementation of extraction processes is liquid–liquid membrane contactors. The transfer of the target component from one immiscible liquid to another is carried out inside membrane pores. For the first time, highly asymmetric track-etched membranes made of polyethylene terephthalate (PET) of the same thickness but with different pore diameters (12.5–19 nm on one side and hundreds of nanometers on the other side) were studied in the liquid–liquid membrane contactor. For analysis of the liquid–liquid interface stability, two systems widely diverging in the interfacial tension value were used: water–pentanol and water–hexadecane. The interface stability was investigated depending on the following process parameters: the porous structure, the location of the asymmetric membrane in the contactor, the velocities of liquids, and the pressure drop between them. It was shown that the stability of the interface increases with decreasing pore size. Furthermore, it is preferable to supply the aqueous phase from the side of the asymmetric membrane with the larger pore size. The asymmetry of the porous structure of the membrane makes it possible to increase the range of pressure drop values between the phases by at least two times (from 5 to 10 kPa), which does not lead to mutual dispersion of the liquids. The liquid–liquid contactor based on the asymmetric track-etched membranes allows for the extraction of impurities from the organic phase into the aqueous phase by using a 1% solution of acetone in hexadecane as an example.

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Performance of a polypropylene membrane contactor for the recovery of dissolved methane from anaerobic effluents: Mass transfer evaluation, long-term operation and cleaning strategies

Cited by 61 publications

References 39 publications

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

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

Mitigation of diffuse CH4 and H2S emissions from the liquid phase of UASB-based sewage treatment plants: challenges, techniques, and perspectives

Interphase Surface Stability in Liquid-Liquid Membrane Contactors Based on Track-Etched Membranes

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