Integration of micro-filtration into osmotic membrane bioreactors to prevent salinity build-up

Wang, Xinhua; Yuan, Bo; Chen, Yao; Li, Xiufen; Ren, Yueping

doi:10.1016/j.biortech.2014.05.121

Cited by 97 publications

(69 citation statements)

References 34 publications

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“…And then, the water flux of the fouled FO membrane after backwashing was also tested. According to Achilli et al (2009) and Wang et al (2014aWang et al ( , 2014b, the difference between the initial flux of new membrane and the flux of fouled membrane before backwashing could be used to characterize the flux decline due to the membrane fouling only, while the flux decline calculated by the drop from the initial flux to the flux after backwashing could be attributed to the irreversible membrane fouling.…”

Section: Offline Batch Experiments For Water Flux Testmentioning

confidence: 99%

In situ observation of the growth of biofouling layer in osmotic membrane bioreactors by multiple fluorescence labeling and confocal laser scanning microscopy

et al. 2015

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Section: Offline Batch Experiments For Water Flux Testmentioning

confidence: 99%

In situ observation of the growth of biofouling layer in osmotic membrane bioreactors by multiple fluorescence labeling and confocal laser scanning microscopy

et al. 2015

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“…The effectiveness of cleaning process was examined by measuring the water flux after cleaning. The water flux recovery was 95.5%, 95.0% and 97.2% for SOA, KH 2 PO 4 and MAP, respectively, as shown in Figure 4a, indicating high fouling reversibility of FO [39]. Figure 4b suggests that no severe fouling occurred during four days of operation of MF-FDFO-MBR study, highlighting the low (or reversible) fouling potential of FO membrane and the effectiveness of aeration on controlling membrane fouling.…”

Section: Effect Of Different Types Of Fertilizersmentioning

confidence: 71%

“…The total TOC removal efficiency of the system could be obtained according to the mass balance of TOC concentration [39]:…”

Section: Toc Removal Efficiency and Mitigating Salt Accumulation By Imentioning

confidence: 99%

Performance of a Novel Fertilizer-Drawn Forward Osmosis Aerobic Membrane Bioreactor (FDFO-MBR): Mitigating Salinity Build-Up by Integrating Microfiltration

Wang

Pathak

Chekli

et al. 2017

Water

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In this paper, three different fertilizer draw solutions were tested in a novel forward osmosis-microfiltration aerobic membrane bioreactor (MF-FDFO-MBR) hybrid system and their performance were evaluated in terms of water flux and reverse salt diffusion. Results were also compared with a standard solution. Results showed that ammonium sulfate is the most suitable fertilizer for this hybrid system since it has a relatively high water flux (6.85 LMH) with a comparatively low reverse salt flux (3.02 gMH). The performance of the process was also studied by investigating different process parameters: draw solution concentration, FO draw solution flow rate and MF imposed flux. It was found that the optimal conditions for this hybrid system were: draw solution concentration of 1 M, FO draw solution flow rate of 200 mL/min and MF imposed flux of 10 LMH. The salt accumulation increased from 834 to 5400 µS/cm during the first four weeks but after integrating MF, the salinity dropped significantly from 5400 to 1100 µS/cm suggesting that MF is efficient in mitigating the salinity build up inside the reactor. This study demonstrated that the integration of the MF membrane could effectively control the salinity and enhance the stable FO flux in the OMBR.

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“…Water flux is a key performance parameter for FO and it decreases with FO operation because of the decreased osmotic pressure due to draw solution dilution/feed solution concentration and reverse salt flux [66]. This is especially important to wastewater treatment when FO is applied in the form of osmotic membrane bioreactor (OsMBR) [67,68], as decreased water flux lowers the treatment capacity and increased salt concentration in wastewater inhibits biodegradation [32,47,48]. To alleviate the salt effects on wastewater treatment and maintain a low salinity in wastewater, an MDC can be linked to an OsMBR as a desalination unit.…”

Section: Providing Suitable Draw Solutementioning

confidence: 99%

When Bioelectrochemical Systems Meet Forward Osmosis: Accomplishing Wastewater Treatment and Reuse through Synergy

Qin

Yuan

et al. 2014

Water

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Bioelectrochemical systems (BES) and forward osmosis (FO) are two emerging technologies with great potential for energy-efficient water/wastewater treatment. BES takes advantage of microbial interaction with a solid electron acceptor/donor to accomplish bioenergy recovery from organic compounds, and FO can extract high-quality water driven by an osmotic pressure. The strong synergy between those two technologies may complement each other and collaboratively address water-energy nexus. FO can assist BES with achieving water recovery (for future reuse), enhancing electricity generation, and supplying energy for accomplishing the cathode reactions; while BES may help FO with degrading organic contaminants, providing sustainable draw solute, and stabilizing water flux. This work has reviewed the recent development that focuses on the synergy between BES and FO, analyzed the advantages of each combination, and provided perspectives for future research. The findings encourage further investigation and development for efficient coordination between BES and FO towards an integrated system for wastewater treatment and reuse. OPEN ACCESSWater 2015, 7 39

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Integration of micro-filtration into osmotic membrane bioreactors to prevent salinity build-up

Cited by 97 publications

References 34 publications

In situ observation of the growth of biofouling layer in osmotic membrane bioreactors by multiple fluorescence labeling and confocal laser scanning microscopy

In situ observation of the growth of biofouling layer in osmotic membrane bioreactors by multiple fluorescence labeling and confocal laser scanning microscopy

Performance of a Novel Fertilizer-Drawn Forward Osmosis Aerobic Membrane Bioreactor (FDFO-MBR): Mitigating Salinity Build-Up by Integrating Microfiltration

When Bioelectrochemical Systems Meet Forward Osmosis: Accomplishing Wastewater Treatment and Reuse through Synergy

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