The performance of gravity-driven membrane (GDM) filtration for roofing rainwater reuse: Implications of roofing rainwater energy and rainwater purification

Du, Xi; Xu, Jiongji; Mo, Zhuoyu; Luo, Yunlong; Su, Junhao; Nie, Jun; Wang, Zhihong; Liu, Lifan; Liang, Heng

doi:10.1016/j.scitotenv.2019.134187

Cited by 43 publications

(15 citation statements)

References 42 publications

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“…In addition, as more Al is produced, it reacts with more OH − ions to create aluminum hydroxide, which acts as an adsorbent that can adsorb/remove contaminants (Negarestani et al, 2020). In this study, the COD content decreased from 52 to 0 mg/L, showing to be more efficient compared to what was reported by Xu et al (2021), who reported a decrease of 1.7 to 1.0 mg/L of COD through electrocoagulation coupled with a gravity-driven membrane for rainwater treatment (Du et al, 2019;Xu et al, 2021).…”

Section: Effect Of Current Densitycontrasting

confidence: 47%

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Morales-Figueroa

Teutli-Sequeira

Linares-Hernández

et al. 2022

Front. Environ. Sci.

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Rainwater collected in the Toluca region of Mexico with a pH of 6.25 was treated with an electrochemical process, and the efficiency of two supporting electrolytes were compared, one food grade (sea salt) and the other reagent grade (sodium sulfate). In the first stage, rainwater was characterized to detect the COD content, turbidity, metals such as zinc, iron, aluminum, and lead. Electrocoagulation treatment was performed with an electrochemical cell using aluminum electrodes to study the effect on COD and turbidity, as well as the removal of heavy metals present. The results obtained with response surface methodology and a central composite design reveal that the optimal conditions of the electrocoagulation treatment were a current density of 3.26 mA/cm2 and a time of 11.38 min. Using sodium sulfate, the percentage of turbidity removal is 99.27% and COD 70.83%. The use of sea salt as a support electrolyte in these conditions allowed the removal of COD at 100%, turbidity at 100%, and Al 100%, Mn 84.29%, Zn 97.97%, Pb 46%, Fe 21%. Energy costs that are low lead to proven savings when using this system, indicating that this treatment is an option to both improve rainwater conditions and be able to make use of it safely.

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Section: Effect Of Current Densitycontrasting

confidence: 47%

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Morales-Figueroa

Teutli-Sequeira

Linares-Hernández

et al. 2022

Front. Environ. Sci.

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“…Donde se estudió y se investigó acerca de la recolección de agua de lluvia, junto con la filtración por membrana accionada por gravedad, donde, se utilizó para el tratamiento del agua lluvia. Tal cual como se muestra en la Ilustración 4 (Du et al, 2019).…”

Section: Ilustración 2 Tecnologías Convencionales De Potabilización unclassified

“…La biopelícula en filtración GDM exhibe una alta actividad biológica y mejora la calidad del agua de lluvia (Du et al, 2019).…”

Section: Ilustración 2 Tecnologías Convencionales De Potabilización unclassified

Purification of harvested rainwater using slow sand filters with low-cost materials: Bacterial community structure and purifying effect

Zhao

Wang

Liu

et al. 2019

Science of The Total Environment

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“…This is further proven by comparing X. Du et al’s [ 65 ] and A. Ding et al’s [ 57 ] reports, where the UF membrane with a smaller pore size achieved a higher stable flux. However, it should be emphasized that the pressure difference is ignored since, as proved in several studies, modifying the TMP did not result in a significant change in the stable flux value in the GDM system [ 10 , 58 , 60 ].…”

Section: Gdm Performancementioning

confidence: 66%

Confounding Effect of Wetting, Compaction, and Fouling in an Ultra-Low-Pressure Membrane Filtration: A Review

et al. 2022

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Ultra-low-pressure membrane (ULPM) filtration has emerged as a promising decentralized water and wastewater treatment method. It has been proven effective in long-term filtration under stable flux without requiring physical or chemical cleaning, despite operating at considerably lower flux. The use of ultra-low pressure, often simply by hydrostatic force (often called gravity-driven membrane (GDM) filtration), makes it fall into the uncharted territory of common pressure-driven membrane filtration. The applied polymeric membrane is sensitive to compaction, wetting, and fouling. This paper reviews recent studies on membrane compaction, wetting, and fouling. The scope of this review includes studies on those phenomena in the ULPM and how they affect the overall performance of the system. The performance of GDM systems for water and wastewater treatment is also evaluated. Finally, perspectives on the future research direction of ULPM filtration are also detailed.

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The performance of gravity-driven membrane (GDM) filtration for roofing rainwater reuse: Implications of roofing rainwater energy and rainwater purification

Cited by 43 publications

References 42 publications

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Purification of harvested rainwater using slow sand filters with low-cost materials: Bacterial community structure and purifying effect

Confounding Effect of Wetting, Compaction, and Fouling in an Ultra-Low-Pressure Membrane Filtration: A Review

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