Sustainable water recovery from oily wastewater via forward osmosis-membrane distillation (FO-MD)

Zhang, Sui; Wang, Peng; Fu, Xiuzhu; Chung, Tai‐Shung

doi:10.1016/j.watres.2013.12.044

Cited by 275 publications

(118 citation statements)

References 34 publications

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“…Efficiency can be improved significantly by raising the distillation column efficiency. the use of advanced draw regeneration processes such as mechanical vapor compression [36], 4 membrane distillation [44], or multi-stage flash distillation [45] rather than an isobaric distillation column. However, due to the unique properties of the draw solution, the optimal draw regeneration technology may be something other than an established desalination process.…”

Section: Forward Osmosismentioning

confidence: 99%

Energy consumption in desalinating produced water from shale oil and gas extraction

et al. 2015

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On-site treatment and reuse is an increasingly preferred option for produced water management in unconventional oil and gas extraction. This paper analyzes and compares the energetics of several desalination technologies at the high salinities and diverse compositions commonly encountered in produced water from shale formations to guide technology selection and to inform further system development. Produced water properties are modeled using Pitzer's equations, and emphasis is placed on how these properties drive differences in system thermodynamics at salinities significantly above the oceanic range. Models of mechanical vapor compression, multi-effect distillation, forward osmosis, humidification-dehumidification, membrane distillation, and a hypothetical high pressure reverse osmosis system show that for a fixed brine salinity, evaporative system energetics tend to be less sensitive to changes in feed salinity. Consequently, second law efficiencies of evaporative systems tend to be higher when treating typical produced waters to near-saturation than when treating seawater. In addition, if realized for high-salinity produced waters, reverse osmosis has the potential to achieve very high efficiencies. The results suggest a different energetic paradigm in comparing membrane and evaporative systems for high salinity wastewater treatment than has been commonly accepted for lower salinity water.

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Section: Forward Osmosismentioning

confidence: 99%

Energy consumption in desalinating produced water from shale oil and gas extraction

et al. 2015

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“…The need for a two-dimensional rating of efficiency stems from the optimization of different processes for particular salinity ranges (e.g., EDR for low-salinity brackish applications) and the effect of salinity on least work of separation. [14], membrane distillation (MD) [15], and multi-stage flash (MSF) [16]. Thermally-regenerated FO has also been modeled by Semiat et al [17].…”

Section: Assessment Of Technologiesmentioning

confidence: 99%

“…However, several advanced thermal draw regeneration processes have been proposed [14,15,16] that may contribute to raising thermal FO efficiency.…”

Section: Assessment Of Technologiesmentioning

confidence: 99%

Raising forward osmosis brine concentration efficiency through flow rate optimization

2015

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An exergetic efficiency is defined in order to compare brine concentration processes including forward osmosis (FO) across a wide range of salinities. We find that existing FO pilot plants have lower efficiency than reverse osmosis plants in the brackish and seawater salinity ranges. High salinity FO, in its current form, is still less efficient than mechanical vapor compression. We show that efficiency is the product of FO exchanger and draw regenerator efficiencies, and therefore FO system energy efficiency benefits from improvements to both. The mass flow rate ratio (between draw and feed flow rates) is identified as a crucial parameter in the design of efficient FO systems because of its effect on exchanger efficiency. We demonstrate a method of thermodynamically balancing an FO system by choosing flow rates that lead to equal osmotic pressure differences at both ends of the exchanger, and show the method's potential to increase efficiency by 3-21% based on current system designs.

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“…The lack of external pressure input also results in cost-saving and energy-efficient water extraction and low membrane fouling (Lutchmiah et al 2014b). Thus, FO is considered as a promising technology for extracting reusable water from complex wastewater such as landfill leachate (Cath et al 2005a, Cath et al 2005b, Cornelissen et al 2011, Holloway et al 2007, Zhang et al 2014d, and dewatering of waste activated sludge (Chung et al 2012a, Cornelissen et al 2008, Zhu et al 2012.…”

Section: Introduction To Forward Osmosismentioning

confidence: 99%

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Qin

2017

Environ. Sci.: Water Res. Technol.

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(academic)Recovering valuable resources from wastewater will transform wastewater management from a treatment focused to sustainability focused strategy, and creates the need for new technology development. An innovative treatment concept -osmotic bioelectrochemical system (OsBES), which is based on cooperation between bioelectrochemical systems (BES) and forward osmosis (FO), has been introduced and studied in the past few years. An OsBES can accomplish simultaneous treatment of wastewater and recovery of resources such as nutrient, energy, and water (NEW). The cooperation can be accomplished in either an integrated (osmotic microbial fuel cells, OsMFC) or coupled (microbial electrolysis cell-forward osmosis system, MEC-FO) configuration.In OsMFC, higher current generation than regular microbial fuel cell (MFC) was observed, resulting from the lower resistance of FO membrane. The electricity generation in OsMFC could greatly inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the coupled OsBES, an MEC-FO system was developed. The MEC produced an ammonium bicarbonate draw solute via recovering ammonia from synthetic organic solution, which was then applied in the FO for extracting water from the MEC anode effluent. The system has been advanced with treating landfill leachate. A mathematical model developed for ammonia removal/recovery in BES quantitatively confirmed that the NH4 + ions serve as effective proton shuttles across cation exchange membrane (CEM). Resource Recovery by Osmotic Bioelectrochemical Systems towards Sustainable Wastewater TreatmentMohan Qin Abstract (general audience)Nowadays, wastewater is no longer considered as waste. Instead, it is a pool for different kinds of resources, such as nutrient, energy, and water (NEW). Various technologies were developed to achieve NEW recovery from wastewater. A novel concept, osmotic bioelectrochemical system (OsBES) has been introduced and studied in the past few years. OsBES is based on two technologies: bioelectrochemical systems (BES) and forward osmosis (FO); and the corporation between these two technologies could accomplish simultaneous wastewater treatment and resource recovery. We investigated two kinds of OsBES: one is osmotic microbial fuel cells (OsMFC), and the other is microbial electrolysis cell-forward osmosis system (MEC-FO). For OsMFC, a mathematical model was built to understand the internal resistance, which will affect the current generation according to Om's law (I=U/R). The salt transport across the cation exchange membrane (CEM) is related to the current generation. The ion transport, especially ammonium/ammonia transport, across CEM membrane in BES was modelled, which will help the BES design and operation for ammonia recovery systems. The system performance for wastewater treatment and resource recovery in MEC-FO was fully investigated with both synthetic wastewater and landfill leach...

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Sustainable water recovery from oily wastewater via forward osmosis-membrane distillation (FO-MD)

Cited by 275 publications

References 34 publications

Energy consumption in desalinating produced water from shale oil and gas extraction

Energy consumption in desalinating produced water from shale oil and gas extraction

Raising forward osmosis brine concentration efficiency through flow rate optimization

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

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