Membrane fouling caused by amino acid and calcium during bipolar membrane electrodialysis

Abstract

BACKGROUND: Bipolar membrane electrodialysis (BMED) has been widely applied in the recovery/production of organic acids and in the treatment of wastewater containing ammonium sulfate, sodium nitrate, sodium acetate and ammonium nitrate. However, membrane fouling is still one of the major problems in the electrodialysis process. Since calcium and amino acid are present naturally in fermentation wastewater, this study was carried out to determine the effects of calcium and amino acid on membrane fouling when simulated fermentation wastewater containing ammonium sulfate was treated by BMED.

Development of monopolar and platinum intermediate bipolar membranes: application in desalting brine solution

“…The highest acidic and basic fluxes observed in the present study was 9.4 × 10 −6 and 7.4 × 10 −6 Mol m −2 s −1 for BPM-II and 14.8 × 10 −6 and 7.41 × 10 −6 Mol m −2 s −1 for BPM-I systems, respectively. According to Ren et al [29], the reduction in the ionic transport rate during later stages of the performance was often correlated with an increased membrane resistance due to the presence of a mixture of organic matter and inorganic salts. As a consequence, during the performance of brine desalination, a slight membrane fouling was observed for both BPM-I and BPM-II systems.…”

Extraction‐Fermentation Hybrid (Extractive Fermentation)

“…Base recovered in ED can also be recycled for use in fermentation to control the pH. However, membrane fouling by proteins, amino acids, and divalent ions Ca 2+ and Mg 2+ , which form insoluble hydroxides at the interface of the bipolar membrane, can cause operation problems (Ren et al ., 2008). The fermentation broth may therefore have to be clarified and partially purified before sending to ED, which could be difficult to do in an integrated fermentation-separation process.…”

Desalination of fish meat extract by electrodialysis and characterization of membrane fouling

“…For the fermentation broth desalination, Ren et al [22,23] investigated the effects of solution pretreatment and online cleaning of ionic membranes on membrane fouling during the (NH 4 ) 2 SO 4 removal via ED from monosodium glutamate isoelectric supernatant. Bazinet and Araya-Farias [24] investigated the impact of calcium and carbonate concentrations in model solution on the composition of cation membrane fouling, and they found that carbonate had a higher buffer capacity to obtain a longer period of ED treatment and higher demineralization rate.…”