The comparative study for scale inhibition on surface of RO membranes in wastewater reclamation: CO 2 purging versus three different antiscalants

Shahid, Muhammad Kashif; Choi, Young-Hyun

doi:10.1016/j.memsci.2017.09.087

Cited by 32 publications

(13 citation statements)

References 54 publications

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“…In particular, the solubility limits of divalent ions (e.g., Ca 2+ , Mg 2+ , etc.) can rise, and subsequent ionic precipitation can influence the mass transport phenomena [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

“…The well-developed calcite crystals were observed in the case of operational Scheme 1. The fibrous structures represented the accumulation of calcium carbonate crystals in combination with other inorganic substances [ 28 ]. Both aragonite bunches (with outwardly directed spikes) and calcite crystals (rhombohedral structure) were observed on the surface of membranes.…”

Section: Resultsmentioning

confidence: 99%

“…A study on antiscalants composed of phosphonic acid derivative and polycarboxylic acid confirmed the adsorption of antifouling agent on the nucleation sites of membranes, resulting in variable crystal morphology [ 28 ]. A similar study reported the interactions between an acrylate functional group (-COO-) and the Ca 2+ .…”

Section: Resultsmentioning

confidence: 99%

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Sustainable Membrane-Based Wastewater Reclamation Employing CO2 to Impede an Ionic Precipitation and Consequent Scale Progression onto the Membrane Surfaces

Shahid

Choi

2021

Membranes

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CO2 capture and utilization (CCU) is a promising approach in controlling the global discharge of greenhouse gases (GHG). This study details the experimental investigation of CO2 utilization in membrane-based water treatment systems for lowering the potential of ionic precipitation on membrane surface and subsequent scale development. The CO2 utilization in feed water reduces the water pH that enables the dissociation of salts in their respective ions, which leave the system as a concentrate. This study compares the efficiency of CO2 and other antifouling agents (CA-1, CA-2, and CA-3) for fouling control in four different membrane-based wastewater reclamation operations. These systems include Schemes 1, 2, 3, and 4, which were operated with CA-1, CA-2, CA-3, and CO2 as antiscalants, respectively. The flux profile and percent salt rejection achieved in Scheme 4 confirmed the higher efficiency of CO2 utilization compared with other antifouling agents. This proficient role of CO2 in fouling inhibition is further endorsed by the surface analysis of used membranes. The SEM, EDS, and XRD examination confirmed the higher suitability of CO2 utilization in controlling scale deposition compared with other antiscalants. The cost estimation also supported the CO2 utilization for environmental friendly and safe operation.

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“…In particular, the solubility limits of divalent ions (e.g., Ca 2+ , Mg 2+ , etc.) can rise, and subsequent ionic precipitation can influence the mass transport phenomena [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sustainable Membrane-Based Wastewater Reclamation Employing CO2 to Impede an Ionic Precipitation and Consequent Scale Progression onto the Membrane Surfaces

Shahid

Choi

2021

Membranes

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“…Intensive cleaning is recommended at high TMP values where further filtration is no longer sustainable. The main cleaning agents used for MBR fouling are sodium hydroxide (NaOH), sodium hypochlorite (NaOCl) for organic foulants, acids such as citric acid, nitric acid, hydrochloric acid for inorganics and other agents such as ethylene diamine tetra acetic acid (EDTA) or ozone or CO 2 purging [76,142,143]. Organic molecules present in biofilm could be hydrolyzed and loosen by NaOCl.…”

Section: Membrane Fouling and Fouling Mechanismsmentioning

confidence: 99%

Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

et al. 2019

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Biohydrogen is a clean and viable energy carrier generated through various green and renewable energy sources such as biomass. This review focused on the application of membrane bioreactors (MBRs), emphasizing the combination of these devices with biological processes, for bio-derived hydrogen production. Direct biophotolysis, indirect biophotolysis, photo-fermentation, dark fermentation, and conventional techniques are discussed as the common methods of biohydrogen production. The anaerobic process membrane bioreactors (AnMBRs) technology is presented and discussed as a preferable choice for producing biohydrogen due to its low cost and the ability of overcoming problems posed by carbon emissions. General features of AnMBRs and operational parameters are comprehensively overviewed. Although MBRs are being used as a well-established and mature technology with many full-scale plants around the world, membrane fouling still remains a serious obstacle and a future challenge. Therefore, this review highlights the main benefits and drawbacks of MBRs application, also discussing the comparison between organic and inorganic membranes utilization to determine which may constitute the best solution for providing pure hydrogen. Nevertheless, research is still needed to overcome remaining barriers to practical applications such as low yields and production rates, and to identify biohydrogen as one of the most appealing renewable energies in the future.

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“…In PW treatment, scale inhibitors decrease scale residues on the membrane surface in a membrane-operated water treatment plant [17,18]. Many antiscalants fight to scale and fouling by attaching to the contaminants in the water, thereby inhibiting it from depositing on the membrane surface [19,20].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Nanofiltration Process of Thin Film Composite Membrane Using Dodecyl Phenol Ethoxylate and Oleic Acid Ethoxylate for Oilfield Calcite Scale Control

et al. 2021

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This research studied the enhancing effect on the nanofiltration composite (TFCNF) membrane of two non-ionic surfactants on a thin-film composite nanofiltration membrane (TFCNF) for calcite scale (CaCO3) inhibition in oilfield application to develop a multifunctional filtration system: nanofiltration, antiscalant, and scale inhibitors. The effectiveness of dodecyl phenol ethoxylate (DPE) and oleic acid ethoxylate (OAE) as novel scale inhibitors were studied using the dynamic method. Scaling tests on the membrane were performed to measure the scaling of the inhibited membrane with and without scale inhibitors for salt rejection, permeability, and flux decline. The results revealed that the TFCNF membrane flux decline was improved in the presence of scale inhibitors from 22% to about 15%. The rejection of the membrane scales increases from 72% for blank membranes, reaching 97.2% and 88% for both DPE and OAE, respectively. These confirmed that scale inhibitor DPE had superior anti-scaling properties against calcite deposits on TFCNF membranes. Inhibited scaled TFCNF membrane was characterized using environmental scanning electron (ESEM), FTIR, and XRD techniques. The results of the prepared TFCNF membrane extensively scaled by the calcite deposits were correlated to its morphology.

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The comparative study for scale inhibition on surface of RO membranes in wastewater reclamation: CO 2 purging versus three different antiscalants

Cited by 32 publications

References 54 publications

Sustainable Membrane-Based Wastewater Reclamation Employing CO2 to Impede an Ionic Precipitation and Consequent Scale Progression onto the Membrane Surfaces

Sustainable Membrane-Based Wastewater Reclamation Employing CO2 to Impede an Ionic Precipitation and Consequent Scale Progression onto the Membrane Surfaces

Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

Enhanced Nanofiltration Process of Thin Film Composite Membrane Using Dodecyl Phenol Ethoxylate and Oleic Acid Ethoxylate for Oilfield Calcite Scale Control

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