Exploring an innovative surfactant and phosphate-based draw solution for forward osmosis desalination

Nguyen, Hau Thi; Chen, Shiao‐Shing; Nguyen, Nguyen Cong; Ngo, Huu Hao; Guo, Wenshan; Li, Chi-Wang

doi:10.1016/j.memsci.2015.03.085

Cited by 57 publications

(22 citation statements)

References 50 publications

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“…The contact angle of the FO membrane was measured by CAM 100 (KSV Instruments Inc., USA).The fouled membranes were observed and examined using SEM-EDS (JSM-5600, JEOL, Tokyo, Japan). and reduced the reverse salt diffusion of Mg 2+ and Cl − , as illustrated in Figure 3 (Nguyen et al 2015a, Nguyen et al 2015b. This phenomenon agrees with the observation by Kiso et al, that: firstly, the hydrophobic interactions between selected pharmaceuticals and CTA FO membranes were the dominant organic removal mechanism; and secondly, the hydrophobicity of the pharmaceuticals strongly influenced their rejection.…”

Section: Methodssupporting

confidence: 90%

“…A mixture of Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and Triton X-100 was used as the draw solution in an OsMBR in our previous study. Although it can reduce the reverse salt flux appreciably and minimize salt accumulation in the bioreactor for a 60-day operation (Nguyen et al 2015a), the water flux was relatively low because of the limited solubility of EDTA-2Na salt in water. Meanwhile, the solubility of MgCl 2 is high (up to 5 M) so as it can produce a high osmotic pressure and high water flux.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Schematic illustration of reduced back diffusion of anions and cations with presence of non-ionic surfactant Triton X-114 during FO(Nguyen et al 2015a, Nguyen et al 2015b). …”

mentioning

confidence: 99%

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Innovative sponge-based moving bed–osmotic membrane bioreactor hybrid system using a new class of draw solution for municipal wastewater treatment

et al. 2016

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For the first time, an innovative concept of combining sponge-based moving bed (SMB) and an osmotic membrane bioreactor (OsMBR), known as the SMB-OsMBR hybrid system, were investigated using Triton X-114 surfactant coupled with MgCl2 salt as the draw solution. Compared to traditional activated sludge OsMBR, the SMB-OsMBR system was able to remove more nutrients due to the thick-biofilm layer on sponge carriers. Subsequently less membrane fouling was observed during the wastewater treatment process. A water flux of 11.38 L/(m(2) h) and a negligible reverse salt flux were documented when deionized water served as the feed solution and a mixture of 1.5 M MgCl2 and 1.5 mM Triton X-114 was used as the draw solution. The SMB-OsMBR hybrid system indicated that a stable water flux of 10.5 L/(m(2) h) and low salt accumulation were achieved in a 90-day operation. Moreover, the nutrient removal efficiency of the proposed system was close to 100%, confirming the effectiveness of simultaneous nitrification and denitrification in the biofilm layer on sponge carriers. The overall performance of the SMB-OsMBR hybrid system using MgCl2 coupled with Triton X-114 as the draw solution demonstrates its potential application in wastewater treatment.

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Section: Methodssupporting

confidence: 90%

Section: Accepted Manuscriptmentioning

confidence: 99%

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Innovative sponge-based moving bed–osmotic membrane bioreactor hybrid system using a new class of draw solution for municipal wastewater treatment

et al. 2016

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“…The reverse salt flux could be calculated by measuring the change of conductivity (conductivity meter, DDB‐303A, Shanghai INESA & Scientific Instrument CO. LTD) in feed solution during the predetermined time interval (Δ t , h ). The reverse salt flux ( J s , g/(m 2 ·h)) was determined as follows :

J_{s} = \frac{normalΔ m_{t}}{S_{m} normalΔ t}

where Δ m t is the weigh change of the salt leakage in the draw solution during a predetermined time interval (Δ t ).…”

Section: Methodsmentioning

confidence: 99%

Effects of organic acids on the performance of cellulose triacetate forward osmosis membrane

Kong

Zheng

Chen

et al. 2018

Polymer Engineering & Sci

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Forward osmosis (FO) membrane performance was improved using different organic acids (formic acid, acetic acid, lactic acid) for the addition of the casting solution. Scanning electron microscope (SEM) images of all the FO CTA membranes exhibited essentially the membranes have a structure of looking like two dense skin layers and a sponge‐like supporting layer. Additionally, based on the surface roughness values analysis of Atomic Force Microscope (AFM), the membranes with lactic acid, with similar roughness to the membranes without any acid, have bigger roughness than the membranes with formic acid or acetic acid. Furthermore, the water flux of membranes with acids has been improved and the reverse salt flux decreased. The membranes with lactic acid, with an outstanding penetration performance, were utilized to test the performance when 1 mol/L sodium chloride (NaCl), magnesium chloride (MgCl2), magnesium sulfate (MgSO4), and sodium sulfate (Na2SO4) were, respectively, as the draw solutions. The results revealed that the membranes have a higher rejection ratio for MgSO4. Besides, in the process of separating oil–water mixture, the membranes with the organic acids have a better separation efficiency than the membrane without any acid during FO process and the water flux recovery rate could achieve above 90% insuring the membrane anti‐fouling. POLYM. ENG. SCI., 59:E138–E145, 2019. © 2018 Society of Plastics Engineers

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“…The first would be to reduce RSF by optimizing the DS composition. For example, inorganic DS can be mixed with surfactant such as Triton X-114(Nguyen et al, 2015) and thus RSF can be significantly reduced . The second would be to enhance the anaerobic activity by taking advantage of the RSF.…”

mentioning

confidence: 99%

Influence of fertilizer draw solution properties on the process performance and microbial community structure in a side-stream anaerobic fertilizer-drawn forward osmosis – ultrafiltration bioreactor

Kim

Chekli

et al. 2017

Bioresource Technology

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In this study, a side-stream anaerobic fertilizer-drawn forward osmosis (FDFO) and ultrafiltration (UF) membrane bioreactor (MBR) hybrid system was proposed and operated for 55days. The FDFO performance was first investigated in terms of flux decline with various fertilizers draw solution. Flux decline was very severe with all fertilizers due to the absence of aeration and the sticky property of sludge. Flux recovery by physical cleaning varied significantly amongst tested fertilizers which seriously affected biofouling in FDFO via reverse salt flux (RSF). Besides, RSF had a significant impact on nutrient accumulation in the bioreactor. These results indicated that nutrient accumulation negatively influenced the anaerobic activity. To elucidate these phenomena, bacterial and archaeal community structures were analyzed by pyrosequencing. Results showed that bacterial community structure was affected by fertilizer properties with less impact on archaeal community structure, which resulted in a reduction in biogas production and an increase in nitrogen content.

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Exploring an innovative surfactant and phosphate-based draw solution for forward osmosis desalination

Cited by 57 publications

References 50 publications

Innovative sponge-based moving bed–osmotic membrane bioreactor hybrid system using a new class of draw solution for municipal wastewater treatment

Innovative sponge-based moving bed–osmotic membrane bioreactor hybrid system using a new class of draw solution for municipal wastewater treatment

Effects of organic acids on the performance of cellulose triacetate forward osmosis membrane

Influence of fertilizer draw solution properties on the process performance and microbial community structure in a side-stream anaerobic fertilizer-drawn forward osmosis – ultrafiltration bioreactor

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