Effect of modified microbial flocculant on membrane fouling alleviation in a hybrid aerobic granular sludge membrane system for wastewater reuse

Zhang, Bing; Tang, Xiaomin; Tang, Heli; Shen, Yu; Shi, Wenxin

doi:10.1016/j.seppur.2022.120819

Cited by 25 publications

(3 citation statements)

References 48 publications

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“…The HPO aliphatic and aromatic parts of NOM tended to adsorb on the HPO membrane surface . The energy barrier, the maximum value of the total interaction, was expressed as the energy required to overcome the fouling binding to the membrane surface . The energy barrier for direct filtration of raw water was 57.6 mJ/m 2 and increased to 96.5 mJ/m 2 , 158.6 mJ/m 2 , and 193.7 mJ/m 2 with the application of UV/PAA, Fe(II)/PAA, and Fe(II)/UV/PAA, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…21 The energy barrier, the maximum value of the total interaction, was expressed as the energy required to overcome the fouling binding to the membrane surface. 53 The energy barrier for direct filtration of raw water was 57.6 mJ/m 2 and increased to 96.5 mJ/m 2 , 158.6 mJ/m 2 , and 193.7 mJ/m 2 with the application of UV/PAA, Fe(II)/ PAA, and Fe(II)/UV/PAA, respectively. This suggests more energy required for foulants to break the energy barrier to reach the membrane surface.…”

Section: Effect Of Preoxidation On Dominant Fouling Mechanismmentioning

confidence: 95%

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Peracetic Acid-Based Oxidation for Ultrafiltration during Natural Water Treatment: Significant Performance Enhancement and Novel Prediction Based on PARAFAC-EEMs Coupling Hydrophilicity Characteristic

2022

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In this study, peracetic acid (PAA) preoxidation based on Fe(II) and UV activation was proposed to mitigate the membrane fouling caused by natural organic matters (NOM) in surface water. Owing to the dual effect of oxidation and coagulation, Fe(II)/UV/PAA preoxidation was an efficient alternative strategy prior to the ultrafiltration (UF) process, with a significantly improved membrane flux by 2.35 times and a remarkably lessened reversible fouling and irreversible fouling resistance by 95.6% and 95.7%, respectively. The degradation effect of naproxen (NAP) exhibited that the oxidation capacities followed the sequence of Fe(II)/UV/PAA > UV/PAA > Fe(II)/PAA > Fe(II)/UV. Among them, the UV/PAA system with stronger oxidative capacity exerted superior removal of organics and irreversible fouling than the Fe(II)/PAA system. For the first time, the PARAFAC-EEMs method was employed to monitor the degradation effect of oxidation on hydrophilic/hydrophobic (HPI/HPO) parts in NOM components and their influence on membrane fouling. It was found that R–C• produced by the UV/PAA process preferentially degraded C1HPI, C2HPI, and C3N‑HPO components, and the recalcitrant foulants that caused irreversible fouling in the Fe(II)/UV/PAA system were small hydrophobic proteins. Moreover, the novel prediction of membrane fouling revealed that C1HPI had a higher correlation with irreversible membrane fouling than C1N‑HPO. There was a certain correlation between the irreversible fouling resistance and tyrosine-like proteins and a poor correlation with humics. Hence, the PARAFAC-EEMs method has a great potential for rapid detection and prediction of membrane fouling caused by the HPI/HPO parts of different fluorescent NOM components.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Preoxidation On Dominant Fouling Mechanismmentioning

confidence: 95%

Peracetic Acid-Based Oxidation for Ultrafiltration during Natural Water Treatment: Significant Performance Enhancement and Novel Prediction Based on PARAFAC-EEMs Coupling Hydrophilicity Characteristic

2022

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“…Membrane fouling decreases membrane permeance, increases cleaning frequency, shortens the lifespan of the membrane, and increases operating costs [ 29 , 30 , 31 , 32 ]. Factors affecting nanofiltration membrane fouling can be generally grouped into three aspects [ 33 , 34 , 35 ]: the feed characteristics such as the pH and ionic conditions; the membrane characteristics such as roughness and hydrophilicity; and the operating conditions such as transmembrane pressure (TMP), temperature, crossflow velocity, and the structure of the membrane module.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Membrane Fouling Control for Brackish Water Treatment Using a Modified Polyamide Composite Nanofiltration Membrane

et al. 2022

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In northwest China, the limited amount of water resources are classified mostly as brackish water. Nanofiltration is a widely applied desalination technology used for brackish water treatment; however, membrane fouling restricts its application. Herein, we modified the membrane with triethanolamine (TEOA) and optimized the operating conditions (transmembrane pressure, temperature, and crossflow velocity) to control the nanofiltration membrane fouling by brackish water. Based on the physiochemical characteristics and desalination performance of the prepared membranes, the membrane modified with 2% TEOA (MPCM2) was identified as the optimal membrane, and 0.5 MPa, 25 °C, and 7 cm/s were identified as the optimal operating conditions through a series of nanofiltration experiments. Moreover, the membrane cleaning procedure for fouled MPCM2 was further determined, and a two-step cleaning procedure using ethylene diamine tetraacetic acid disodium followed by HCl with a permeance recovery rate of 98.77% was identified as the optimal cleaning procedure. Furthermore, the characterizations of the fouled and cleaned MPCM2 showed that the optimized cleaning procedure could recover the properties of MPCM2 to near virgin. This study is of great significance for the long-term stable operation of nanofiltration processes in brackish water treatment to ensure the supply of healthy water in the water-deficient areas of northwest China.

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A critical review on thermodynamic mechanisms of membrane fouling in membrane-based water treatment process

Teng

Ding

Zhou

et al. 2023

Front. Environ. Sci. Eng.

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Effect of modified microbial flocculant on membrane fouling alleviation in a hybrid aerobic granular sludge membrane system for wastewater reuse

Cited by 25 publications

References 48 publications

Peracetic Acid-Based Oxidation for Ultrafiltration during Natural Water Treatment: Significant Performance Enhancement and Novel Prediction Based on PARAFAC-EEMs Coupling Hydrophilicity Characteristic

Peracetic Acid-Based Oxidation for Ultrafiltration during Natural Water Treatment: Significant Performance Enhancement and Novel Prediction Based on PARAFAC-EEMs Coupling Hydrophilicity Characteristic

Evaluation of Membrane Fouling Control for Brackish Water Treatment Using a Modified Polyamide Composite Nanofiltration Membrane

A critical review on thermodynamic mechanisms of membrane fouling in membrane-based water treatment process

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