Effects of epichlorohydrin–dimethylamine on coagulation and membrane performance of ferric chloride in coagulation–ultrafiltration hybrid process

Sun, Shenglei; Bu, Fan; Huang, Xin; Zhao, Shuang; Dong, Hongyu; Gao, Baoyu; Feng, Lijuan; Wang, Yan; Li, Qian

doi:10.1016/j.cej.2015.06.011

Cited by 19 publications

(3 citation statements)

References 43 publications

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“…Results showed that coagulation enhanced the removal of algal organic matter and reduced the fouling potential of algal organic matter. Sun et al . found that water pretreated by coagulation caused lighter membrane fouling than raw water.…”

Section: Introductionmentioning

confidence: 79%

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Hou

2018

J of Chemical Tech & Biotech

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BACKGROUND: Ultrafiltration (UF) technology is efficient in treating wastewater. However, membrane fouling during filtration process affects the performance of UF to a large extent. Pretreatment prior to UF is important for enhancing membrane performance, reducing membrane fouling and extending the membrane lifetime. RESULTS:In this study, two pretreatment technologies, including coagulation and Fenton, were applied individually before UF for treating secondary effluent (SE) from recycled paper mill. Results exhibited that direct membrane filtration got the highest flux loss and worst membrane fouling compared with performances of those conducting pretreatments. Compared to coagulation + UF, Fenton + UF had superior performance in reducing dissolved organics with a COD rejection of 91.81%, and mitigating membrane fouling with a stable flux of 133 J m −2 h −1 . GPC results further showed that Fenton pretreatment degraded macromolecules into smaller organic compounds. In addition, the classical blocking filtration laws were employed to scrutinize the fouling alleviation mechanism of pretreatments. CONCLUSION: Pretreatments prolonged the transition from pore blocking to cake filtration, thereby reducing fouling. Among them, Fenton was a promising pretreatment method prior to UF for treating recycled paper SE.

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Section: Introductionmentioning

confidence: 79%

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Hou

2018

J of Chemical Tech & Biotech

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Section: Resultsmentioning

confidence: 99%

“…It is well known coagulation was a common process applied in water treatment, and has been widely employed in UF membrane to alleviate fouling. [52] When coagulant was used, the size of HA particles increased, so these foulants could not pass through the membrane, which would bring about alleviation in the membrane fouling. [53] To investigate the antifouling features of the prepared membrane in HA separation without and with PAC coagulant, fouling parameters RFR, IFR, TFR, and FRR were estimated and the outcomes are illustrated in Figure 9.…”

Section: Antifouling and Efficiency Of Prepared Membranesmentioning

confidence: 99%

Effect of alumina nanoparticles on the antifouling properties of polycarbonate‐polyurethane blend ultrafiltration membrane for water treatment

Etemadi

Afsharkia

Zinatloo-Ajabshir

et al. 2021

Polymer Engineering & Sci

105

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In this work, the flexibility of polycarbonate (PC) membrane was improved by using polyurethane (PU) additive. However, due to the hydrophobic nature of the PU polymer, alumina (Al2O3) nanoparticles were incorporated to PC‐PU blend membrane. The prepared membranes have been used in a submerged membrane system to eliminate humic acid molecules from polluted water in both the presence and absence of coagulant (polyaluminum chloride). The obtained results showed that introduction of PU into PC membrane diminished hydrophilicity and enhanced porosity. Moreover, the flexibility of the PC membrane remarkably improved. Introduction of 1.5 wt% Al2O3 to the PC‐PU blend membrane led to enhancement in both porosity and hydrophilicity. Results of morphological studies showed that in the presence of Al2O3 nanostructures, finger‐shaped voids seemed to elongate across the entire thickness of the prepared membrane. Atomic force microscopy images showed that incorporation of PU and Al2O3 to the PC membrane resulted in a smoother surface. The antifouling performance of membranes revealed that the PC‐PU/Al2O3 nanocomposite membrane possessed the most favorable antifouling features owing to its lowest surface roughness as well as highest hydrophilicity. For all membranes utilizing coagulant (PAC), the irreversible fouling ratio and the flux recovery ratio significantly diminished and increased, respectively.

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Hybrid coagulation-UF processes for spent filter backwash water treatment: a comparison studies for PAFCl and FeCl3 as a pre-treatment

Ebrahimi

Amin

Pourzamani

et al. 2017

Environ Monit Assess

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In this study, the reclamation of clean water from spent filter backwash water (SFBW) was investigated through pilot-scale experiments. The pilot plant consisted of pre-sedimentation, coagulation, flocculation, clarification, and ultrafiltration (UF). Two coagulants of PAFCl and FeCl were investigated with respect to their performance on treated SFBW quality and UF membrane fouling. At the optimum dose of PAFCl and FeCl turbidity removal of 99.6 and 99.4% was attained, respectively. PAFCl resulted in an optimum UV, TOC, and DOC removal of 80, 83.6, and 72.7%, respectively, and FeCl caused the removal of those parameters by 76.7, 80.9, and 65.9%, respectively. PAFCl removed hydrophilic and transphilic constituent better than FeCl, but FeCl had, to some extent, higher affinities to a hydrophobic fraction. It was concluded that PAFCl showed a better coagulation performance in most cases and caused a lower membrane fouling rate compared to FeCl. Finally, the treated SFBW with both coagulant-UF systems met the drinking water standards.

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Effects of epichlorohydrin–dimethylamine on coagulation and membrane performance of ferric chloride in coagulation–ultrafiltration hybrid process

Cited by 19 publications

References 43 publications

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Effect of alumina nanoparticles on the antifouling properties of polycarbonate‐polyurethane blend ultrafiltration membrane for water treatment

Hybrid coagulation-UF processes for spent filter backwash water treatment: a comparison studies for PAFCl and FeCl3 as a pre-treatment

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