Seawater-driven forward osmosis for enriching nitrogen and phosphorous in treated municipal wastewater: Effect of membrane properties and feed solution chemistry

Xue, Wenchao; Tobino, Tomohiro; Nakajima, Fumiyuki; Yamamoto, Kazuo

doi:10.1016/j.watres.2014.11.007

Cited by 137 publications

(53 citation statements)

References 41 publications

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“…The membrane in FO process showed very high retention of PO 4 superior to 90% and 80 − 90% for K ions. These values are similar to those obtained in other FO experiments [13,23,24]. Nearly 30% of the IC passed through the membrane.…”

Section: Solute Diffusion Through the Membranesupporting

confidence: 90%

Estimation of Water Flux and Solute Movement during the Concentration Process of Hydrolysed Urine by Forward Osmosis

Nikiema

Ito

Guizani

et al. 2017

J. of Wat. & Envir. Tech.

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Urine is rich in nutrients and can be applied as a fertilizer. The limitation on the application is the transportation cost for the farmlands. The cost estimation required 80% of the volume reduction for a feasible utilization of urine in the farmlands near urban areas. The volume reduction system by forward osmosis (FO) process was proposed to address this problem. In this study, the experiments on FO process with real and synthetic hydrolysed urine were performed to assess the FO performances, to evaluate the solute diffusion and to describe the water flux considering the activity of solutes. This study showed both real and synthetic urine can be concentrated to 2-5 times with 2-5 mol/L sodium chloride solution. High diffusivity of ammonia and carbonates were observed, but the diffusion of other solutes was low. The activities of the solutes in the non-ideal solution should be considered for estimation of the osmotic pressure of the solution which reflects the water flux. The software PHRE-EQC can be used for estimation of the activities in such high concentration solutions. The organic matter in real hydrolysed urine had a negligible effect on the osmotic pressure variations.

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Section: Solute Diffusion Through the Membranesupporting

confidence: 90%

Estimation of Water Flux and Solute Movement during the Concentration Process of Hydrolysed Urine by Forward Osmosis

Nikiema

Ito

Guizani

et al. 2017

J. of Wat. & Envir. Tech.

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“…The surface charge was negative at pH higher than 3.5. The ABBM had a similar zeta potential distribution to the TFC membrane provided by HTI, except that the pH of lactic acid at C1, C2 and C3 was 4.3 ± 0.0, 2.9 ± 0.0 and 2.4 ± 0.0, respectively, the pH of the FS containing other selected solutes were all higher than 4.5. Therefore, when lactic acid was used as the solute in FS, the membrane surface is nearly electrically neutral or positively charged, while the membrane surface charge was negative when other selected solutes were used in the FS.…”

Section: Resultsmentioning

confidence: 97%

Permeation of greywater constituents in an aquaporin based biomimetic forward osmosis membrane process: experimental performance and modeling

2019

J of Chemical Tech & Biotech

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BACKGROUND An aquaporin based biomimetic forward osmosis (FO) membrane was tested with 11 greywater constituents to evaluate the membrane performance. The effects of solute type and concentration on water flux and rejection were investigated. A model was developed to predict the rejection of greywater constituents in the FO process. RESULTS The aquaporin based biomimetic membrane (ABBM) presented high water flux (16.1–17.4 L m‐2 h−1) for greywater. Inorganic ions had little effect on permeability of the ABBM. For the tested organic solutes, while lactic acid, glucose and sodium dodecyl benzene sulfonate showed a positive impact on permeability of the ABBM, sodium dodecyl sulfate had a negative effect. After the tests of 11 selected constituents in greywater, the ABBM showed good chemical stability. Steric hindrance and electrostatic interaction both governed the diffusion of feed solutes through the ABBM. The mathematical model developed in this study accurately predicted the solute with small permeability coefficient (Bp value <3 L m‐2 h−1) transport through the ABBM. And it was suitable for predicting the rejections of target solutes at low FS concentration (≤ 6 mmol L–1). CONCLUSION This study demonstrated that the ABBM could be used in greywater treatment and the developed model could contribute to greywater reuse. © 2019 Society of Chemical Industry

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“…The high performance of the CTA-227 FO membrane can be attributed to the electrostatic repulsion between the negatively charged 228 phosphate ions and the strong negative charge of the membrane at the working solution pH (i.e. 229 between pH of 8.0 -8.7) [20]. Steric hindrance (size exclusion) was also an important rejection 230 mechanism, since phosphate has a large hydrated radius.…”

Section: Forward Osmosis Membrane Nutrient Rejection 223mentioning

confidence: 99%

Phosphorus recovery from digested sludge centrate using seawater-driven forward osmosis

Ansari

Hai

Price

et al. 2016

Separation and Purification Technology

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. Phosphorus recovery from digested sludge centrate using seawater-driven forward osmosis. Separation and Purification Technology, 163 1-7.Phosphorus recovery from digested sludge centrate using seawater-driven forward osmosis AbstractIn this study, we demonstrate a novel seawater-driven forward osmosis (FO) process to recover calcium phosphate precipitates from digested sludge centrate without any chemical addition and draw solute regeneration. The FO process effectively pre-concentrated phosphate and calcium in the digested sludge centrate. Spontaneous precipitation of calcium phosphate minerals in the digested sludge centrate was achieved by the sustained concentrative action of the FO process and the gradual pH increase due to the diffusion of protons to the draw solution. Pre-concentrating digested sludge centrate by three-fold resulted in a 92% recovery of phosphate via precipitation. The phosphate precipitate only constituted 3% of the total inorganic solids recovered, therefore subsequent treatment steps would be required to recover phosphorus in a useable form. A water flux decline of 30% from the initial value was observed as the digested sludge was concentrated by three-fold. This observed water flux decline was mostly attributed to the decrease in the effective osmotic driving force due to the increasingly concentrated feed solution and diluted draw solution. It is also noteworthy that membrane fouling was readily reversible. By flushing the membrane with deionised water and subjecting the membrane to feed and draw solutions with the same osmotic pressure as the initial conditions, complete water flux recovery could be achieved. of the total inorganic solids recovered, therefore subsequent treatment steps would be required to 32 recover phosphorus in a useable form. A water flux decline of 30% from the initial value was 33 observed as the digested sludge was concentrated by three-fold. This observed water flux decline 34 was mostly attributed to the decrease in the effective osmotic driving force due to the 35 increasingly concentrated feed solution and diluted draw solution. It is also noteworthy that 36 membrane fouling was readily reversible. By flushing the membrane with deionised water and 37 subjecting the membrane to feed and draw solutions with the same osmotic pressure as the initial 38 conditions, complete water flux recovery could be achieved. 39 40 Disciplines Engineering | Science and Technology Studies

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Seawater-driven forward osmosis for enriching nitrogen and phosphorous in treated municipal wastewater: Effect of membrane properties and feed solution chemistry

Cited by 137 publications

References 41 publications

Estimation of Water Flux and Solute Movement during the Concentration Process of Hydrolysed Urine by Forward Osmosis

Estimation of Water Flux and Solute Movement during the Concentration Process of Hydrolysed Urine by Forward Osmosis

Permeation of greywater constituents in an aquaporin based biomimetic forward osmosis membrane process: experimental performance and modeling

Phosphorus recovery from digested sludge centrate using seawater-driven forward osmosis

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