Ultrafiltration recovery of alginate: Membrane fouling mitigation by multivalent metal ions and properties of recycled materials

Daqi Cao; Jingyi Jin; Qunhui Wang; Xin Song; Xiaodi Hao; Eiji Iritani; Nobuyuki Katagiri

doi:10.1016/j.cjche.2020.05.014

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Ultrafiltration recovery of alginate: Membrane fouling mitigation by multivalent metal ions and properties of recycled materials

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Ultrafiltration recovery of alginate: Membrane fouling mitigation by multivalent metal ions and properties of recycled materials
- Chinese Journal of Chemical Engineering Vol. 28, Issue 11, Pages: 2881-2889(2020)
- Affiliations：
  
  1. Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture,Beijing,China,100044
  2. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing,Beijing,China,100083
  3. Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya-, Aishi,shi,Japan,464-8603
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.05.014
  CLC：
- Published：2020
- Accepted：
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Daqi Cao, Jingyi Jin, Qunhui Wang, Xin Song, Xiaodi Hao, Eiji Iritani, Nobuyuki Katagiri. Ultrafiltration recovery of alginate: Membrane fouling mitigation by multivalent metal ions and properties of recycled materials[J]. Chinese Journal of Chemical Engineering, 2020, 28(11): 2881-2889.
DOI：

Daqi Cao, Jingyi Jin, Qunhui Wang, Xin Song, Xiaodi Hao, Eiji Iritani, Nobuyuki Katagiri. Ultrafiltration recovery of alginate: Membrane fouling mitigation by multivalent metal ions and properties of recycled materials[J]. Chinese Journal of Chemical Engineering, 2020, 28(11): 2881-2889. DOI： 10.1016/j.cjche.2020.05.014.

摘要

Abstract

Recovery of alginate extracted from aerobic granular sludge (AGS) has given rise to a novel research direction. However

these extracted alginate solutions have a water content of nearly 100%. Alternately

ultrafiltration (UF) is generally used for concentration of polymers. Furthermore

the introduction of multivalent metal ions into alginate may provide a promising method for the development of novel nanomaterials. In this study

membrane fouling mitigation by multivalent metal ions

both individually and in combination

and properties of recycled materials were investigated for UF recovery of sodium alginate (SA). The filtration resistance showed a significantly negative correlation with the concentration of metal ions

arranged in the order of Mg

(filtration resistance mitigation)

and the moisture content of recycled filter cake showed a marked decrease. For Ca

and Ca

+Fe

the filtration resistances were almost the same when the total charge concentration was less than 5 mmol·L

-1

. However

when the total charge concentration was greater than 5 mmol·L

-1

membrane fouling mitigation increased significantly in the presence of Ca

or Fe

and remained constant for Mg

with the increase of total charge concentration. The filtration resistance mitigation was arranged in the order of Fe

+ Ca

. Three mechanisms were proposed in the presence of Fe

such as the decrease of SA concentration

change in pH

and production of hydroxide iron colloids from hydrolysis. The properties of recycled materials (filter cake) were investigated

via

optical microscope observation

dynamic light scattering

Fourier transform infrared

X-ray photoelectron spectroscopy (XPS)

and scanning electron microscopy. The results provide further insight into UF recoveries of alginate extracted from AGS.

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