Pressure assisted fertiliser drawn osmosis process to enhance final dilution of the fertiliser draw solution beyond osmotic equilibrium

Sahebi, Soleyman; Phuntsho, Sherub; Kim, Jung Eun; Hong, Seungkwan; Shon, Ho Kyong

doi:10.1016/j.memsci.2015.01.055

Cited by 80 publications

(64 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the membrane tests including the pure water peremeability (A value), PAO and FO processes were conducted using a FO cell similar to the cell used in our previous work [26]. For membrane tests in the RO mode, the channel on the DS side of the membrane cell was filled with six layers of diamond shaped polystyrene spacers to prevent membrane deformation and damage due to applied hydraulic pressure on the feed side.…”

Section: Measurement Of Pure Water Permeability and Rejection Propertiesmentioning

confidence: 99%

Thin-film composite membrane on a compacted woven backing fabric for pressure assisted osmosis

et al. 2017

Self Cite

View full text Add to dashboard Cite

TFC membrane supported on backing fabric was fabricated for PAO process.• RO and FO membrane casting methods were investigated. • PAO membrane had a higher S value compared to FO membranes. • PAO membrane had a higher water permeability compared to FO membranes. • Developed PAO membrane can sustain applied hydraulic pressure.The water flux in forward osmosis (FO) process declines substantially when the draw solution (DS) concentration reaches closer to the point of osmotic equilibrium with the feed solution (FS). Using external hydraulic pressure alongside the osmotic driving force in the pressure assisted osmosis (PAO) has been found effective in terms of enhancing water flux and even potentially diluting the DS beyond osmotic equilibrium. The net gain in water flux due to the applied pressure in the PAO process closely depends on the permeability of the FO membrane. The commercial flat sheet cellulose triacetate (CTA) FO membrane has low water permeability and hence the effective gain in water flux in the PAO process is low. In this study, a high performance thin film composite membrane was developed especially for the PAO process through casting polyethersulfone (PES) polymer solution on a compacted woven fabric mesh support followed by interfacial polymerisation for polyamide active layer. This PAO membrane possesses a water flux of 37 L m 2 h −1 using 0.5 M NaCl as DS and deionised water as the feed at an applied hydraulic pressure of 10 bar. Besides, the membrane was able to endure the external hydraulic pressure required for the PAO process owing to the embedded backing fabric support. While the membranes with low structural parameters are essential for higher water flux, this study shows that for PAO process, polymeric

show abstract

Section: Measurement Of Pure Water Permeability and Rejection Propertiesmentioning

confidence: 99%

Thin-film composite membrane on a compacted woven backing fabric for pressure assisted osmosis

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The viscosities of metal-EDTA complex solutions were obtained by a rotary viscometer (LVDV-II + Pro, Brookfield, USA) equipped with the enhanced UL Adapter at 25 ± 0.5°C. The osmotic pressure differences between NaCl and EDTA complex solutions under the same concentrations were reflected by the direction of water flux in FO [8,13,39]. During the comparison, NaCl solution was placed against the active layer of FO membrane and EDTA complex solution with the same concentration flowed on the other side of the membrane.…”

Section: Characterizations Of Edta Complexesmentioning

confidence: 99%

“…According to previous studies, 33 wt.% thermoresponsive magnetic nanoparticles and 0.4 g/mL Na+-functionalized carbon quantum dots can produce an osmolality of 2250 mOsm/kg and 3140 5. The relationship between direction of water flux and osmotic pressure difference across an ideal semipermeable membrane modified from [8,13,39], where π D is the osmotic pressure of draw solution and π F is the osmotic pressure of feed solution. The draw solution and feed solution in the same concentration are facing membrane support layer and active layer, respectively.…”

Section: Characteristics For Draw Solutions Of Edta Complexesmentioning

confidence: 99%

“…Despite the fact that the diluted draw solutions can be directly utilized for agricultural irrigation and thus be free from reconcentration, their applications are limited. Meanwhile, the content of final diluted fertilizer draw solution is generally higher than acceptable limits for fertigation, which requires additional process to reduce the fertilizer concentration [39]. Most recently, there has been a significant progress in the development of synthetic materials as draw solutes, such as magnetic nanoparticles, polyelectrolytes, polymer hydrogels, and stimuli-responsive polymer [29,[40][41][42].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An initial study of EDTA complex based draw solutes in forward osmosis process

et al. 2016

View full text Add to dashboard Cite

“…Research using pressure-assisted osmosis (PAO), which is also referred to as pressurized forward osmosis (PFO) or pressure-assisted FO (PAFO), has recently been proposed that applies the pressure at the feed side in order to further enhance the performance of the FO process (Figure 1b). A pressure ranging from 0 bar to 10 bar has typically been applied in order to increase the water transport while avoiding substantial increases in the energy consumption [17]. In contrast to these two cases, however, a pressure lower than the osmotic pressure difference between the feed and draw solutions is applied at the draw side in the PRO process (Figure 1c).…”

Section: Characteristics Of Osmosis-driven Processesmentioning

confidence: 99%

Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

et al. 2015

View full text Add to dashboard Cite

Global energy consumption has been highly dependent on fossil fuels which cause severe climate change and, therefore, the exploration of new technologies to produce effective renewable energy plays an important role in the world. Pressure-retarded osmosis (PRO) is one of the promising candidates to reduce the reliance on fossil fuels by harnessing energy from the salinity gradient between seawater and fresh water. In PRO, water is transported though a semi-permeable membrane from a low-concentrated feed solution to a high-concentrated draw solution. The increased volumetric water flow then runs a hydro-turbine to generate power. PRO technology has rapidly improved in recent years; however, the commercial-scale PRO plant is yet to be developed. In this context, recent developments on the PRO process are reviewed in terms of mathematical models, membrane modules, process designs, numerical works, and fouling and cleaning. In addition, the research requirements to accelerate PRO commercialization are discussed. It is expected that this article can help comprehensively understand the PRO process and thereby provide essential information to activate further research and development. OPEN ACCESSEnergies 2015, 8 11822

show abstract

Pressure assisted fertiliser drawn osmosis process to enhance final dilution of the fertiliser draw solution beyond osmotic equilibrium

Cited by 80 publications

References 38 publications

Thin-film composite membrane on a compacted woven backing fabric for pressure assisted osmosis

Thin-film composite membrane on a compacted woven backing fabric for pressure assisted osmosis

An initial study of EDTA complex based draw solutes in forward osmosis process

Recent Advances in Osmotic Energy Generation via Pressure-Retarded Osmosis (PRO): A Review

Contact Info

Product

Resources

About