Osmosis membrane bioreactor–microfiltration with magnesium-based draw solute for salinity reduction and phosphorus recovery

Chang, Hau‐Ming; Chen, Shiao‐Shing; Nguyen, Nguyen Cong; Chang, Wen-Shing; Ray, Saikat Sinha

doi:10.1016/j.ibiod.2017.05.022

Cited by 32 publications

(6 citation statements)

References 35 publications

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“…Além disso, o acúmulo de MgCl 2 aumentou a recuperação de P-PO 4 3no OMBR aeróbio (QIU; TING, 2014). Chang et al (2017) também utilizaram MgCl 2 como soluto de uma SO, em um OMBR aeróbio combinado com microfiltração para tratar efluente sintético. P-PO 4 3foi recuperado de forma…”

Section: Introductionunclassified

Biorreator osmótico anaeróbio acoplado à destilação com membranas como alternativa para a concentração e recuperação de nutrientes no tratamento de esgotos domésticos

Arcanjo

Santos

Cavalcante

et al. 2023

Cad. Téc. Eng. Sanit. Ambiente.

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O objetivo deste trabalho foi estimar a precipitação de sais de fósforo em biorreator osmótico anaeróbio acoplado à destilação com membranas (AnOMBR-MD) empregado no tratamento de esgoto doméstico. MgCl2 foi utilizado para compor a solução osmótica (SO) do AnOMBR-MD. Um módulo híbrido com membranas de osmose direta (OD) e destilação (MD) foi submerso em um biorreator, e os fluxos de permeado estabilizaramse em 0,5 L m-2 h-1. A rejeição do sal pela MD foi superior a 99,6%, e mais de 90% do carbono orgânico dissolvido foi removido. Uma fração do N-NH4 + permeou a membrana de OD, e a SO apresentou concentração média de 7 mg L-1. P-PO4 3- não foi detectado na SO nem no destilado, com remoção global maior que 99,99% durante toda a operação, entretanto a concentração de P-PO4 3- no líquido reacional (LR) foi menor que a calculada pelo balanço de massa, indicando precipitação de sais com o íon. Foi utilizado o software Visual MINTEQ 3.1 para calcular as especiações dos íons inorgânicos (Ca2+, Mg2+, NH4 + e PO4 3-) e a precipitação espontânea de P-PO4 3-. Com o aumento da concentração de Mg2+ no LR, o modelo termodinâmico mostrou que pode ter havido precipitação de MgCO3 , CaHPO4 e MgNH4 PO4 .6H2 O, o que também justifica a redução das concentrações de N-NH4 + e P-PO4 3- no LR no 16º dia de operação. Os sais precipitados podem ser utilizados como fertilizante agrícola, o que mostra a sustentabilidade do processo de tratamento de esgotos em AnOMBRMD, promovendo a integração do nexo água-alimento.

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Section: Introductionunclassified

Biorreator osmótico anaeróbio acoplado à destilação com membranas como alternativa para a concentração e recuperação de nutrientes no tratamento de esgotos domésticos

Arcanjo

Santos

Cavalcante

et al. 2023

Cad. Téc. Eng. Sanit. Ambiente.

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“…In addition, biological performance can be affected severely by salinity buildup and RSF. Chang et al [11] reported declining flux over long periods of operation due to RSF and draw solution dilution when using MgCl 2 as a draw solute. Flux decreased from 3.7 to 3.3 L/m 2 /h over 85 days and high salinity buildup was observed in the bioreactor.…”

Section: Introductionmentioning

confidence: 99%

Water Recovery from Bioreactor Mixed Liquors Using Forward Osmosis with Polyelectrolyte Draw Solutions

2021

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This paper reports on the use of forward osmosis (FO) with polyelectrolyte draw solutions to recover water from bioreactor mixed liquors. The work was motivated by the need for new regenerative water purification technologies to enable long-duration space missions. Osmotic membrane bioreactors may be an option for water and nutrient recovery in space if they can attain high water flux and reverse solute flux selectivity (RSFS), which quantifies the mass of permeated water per mass of draw solute that has diffused from the draw solution into a bioreactor. Water flux was measured in a direct flow system using wastewater from a municipal wastewater treatment plant and draw solutions prepared with two polyelectrolytes at different concentrations. The direct flow tests displayed a high initial flux (>10 L/m2/h) that decreased rapidly as solids accumulated on the feed side of the membrane. A test with deionized water as the feed revealed a small mass of polyelectrolyte crossover from the draw solution to the feed, yielding an RSFS of 80. Crossflow filtration experiments demonstrated that steady state flux above 2 L/m2·h could be maintained for 70 h following an initial flux decline due to the formation of a foulant cake layer. This study established that FO could be feasible for regenerative water purification from bioreactors. By utilizing a polyelectrolyte draw solute with high RSFS, we expect to overcome the need for draw solute replenishment. This would be a major step towards sustainable operation in long-duration space missions.

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“…A major challenge in the AnOMBR hybrid system process lies in the accumulation of salt in anaerobic reactor and high energy consumption in draw solution recovery. The accumulation of salt reduces the water flux due to lower osmotic pressure, and affects the microbial activity of the activated sludge in the AnOMBR system . To overcome this problem, several previous studies have applied a microfiltration (MF)/ultrafiltration (UF) membrane to discharge solutes from the bioreactor .…”

Section: Introductionmentioning

confidence: 99%

“…The accumulation of salt reduces the water flux due to lower osmotic pressure, and affects the microbial activity of the activated sludge in the AnOMBR system. [16][17][18] To overcome this problem, several previous studies 24 (MRC)-AnOMBR 0.5 mol L −1 NaCl RO 4 AnOMEBR and AnOMBR 2 mol L −1 Mg(C 2 H 3 O 2 ) 2 Did not report. 6 AnOMBR 0.5 mol L −1 NaCl Did not report.…”

Section: Introductionmentioning

confidence: 99%

“…The accumulation of salt reduces the water flux due to lower osmotic pressure, and affects the microbial activity of the activated sludge in the AnOMBR system. [16][17][18] To overcome this problem, several previous studies have applied a microfiltration (MF)/ultrafiltration (UF) membrane to discharge solutes from the bioreactor. 16,[19][20][21]34 Kim et al, Luo et al, and Wang et al [22][23][24] used the AnOMBR-RO with continuous MF membrane extraction and concluded that integrating an MF membrane stabilized OMBR water flux in the range of 2-4 L m −2 h −1 kept the conductivity of mixed liquor in the AnMF-OMBR at a low range of 2.5-4.0 mS cm −1 .…”

Section: Introductionmentioning

confidence: 99%

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Mesophilic microfiltration–anaerobic osmotic membrane bioreactor–membrane distillation hybrid system for phosphorus recovery

Chang

Chen

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND For the first time, a closed‐loop anaerobic osmotic membrane bioreactor–membrane distillation (AnOMBR‐MD) hybrid system integrated with periodic microfiltration (MF) extraction was investigated for simultaneous nutrient and energy recovery while maintaining high water quality for reuse. In addition, phosphorus (P) was recovered as a valuable material for agricultural purposes. RESULTS The AnOMBR‐MD system exhibited excellent nutrient (>99.9%) and organic removal (almost 100%) due to double‐layer filtration (FO and MD membrane). Moreover, higher methane production (0.24 L CH4/g COD) was achieved from the MF‐AnOMBR process to supply a heat source for MD during the draw solution recovery process to reduce energy consumption. The MF permeate can significantly reduce the scaling potential caused by PO43− ions in bulk solution and mitigate salt accumulation in the anaerobic reactor. The P from the MF permeate was effectively recovered with an efficacy of 60 mg L−1 when the solution pH was adjusted to 12. CONCLUSION The overall performance of the MF‐AnOMBR‐MD hybrid system using 1.5 mol L−1 MgSO4 as the draw solution demonstrates its potential application in wastewater treatment with high nutrient recovery in the closed‐loop system. Moreover, this system combined with MD in AnOMBR for draw solution recovery could achieve low energy consumption when its biogas production is utilized as heat source from the anaerobic system. © 2018 Society of Chemical Industry

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Osmosis membrane bioreactor–microfiltration with magnesium-based draw solute for salinity reduction and phosphorus recovery

Cited by 32 publications

References 35 publications

Biorreator osmótico anaeróbio acoplado à destilação com membranas como alternativa para a concentração e recuperação de nutrientes no tratamento de esgotos domésticos

Biorreator osmótico anaeróbio acoplado à destilação com membranas como alternativa para a concentração e recuperação de nutrientes no tratamento de esgotos domésticos

Water Recovery from Bioreactor Mixed Liquors Using Forward Osmosis with Polyelectrolyte Draw Solutions

Mesophilic microfiltration–anaerobic osmotic membrane bioreactor–membrane distillation hybrid system for phosphorus recovery

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