Resumé
Kalanchoe leaves and stems contain flavonoids known to have anti-inflammatory, anti-microbial and anti-allergenic properties of interest for use in cosmetics and pharmaceuticals. The present study investigates the aqueous extraction of flavonoids from the leaves and stems of kalanchoe hybrids. The extraction process consisted of screw pressing followed by aqueous batch extraction, microfiltration using tubular 0.2 μm polypropylene membranes, 20 kDa polyethersulfone flat sheet membranes and 1 kDa composite fluoropolymer membranes. The experiments showed that the screw press efficiently separated the kalanchoe leaves and stems into a solid fraction with a dry matter content of 14 % and a liquid fraction with a dry matter content of 2.4 %. Approximately two thirds of the flavonoids were in the liquid phase after the initial pressing. The batch extraction time was found to be 3 hours to achieve maximum flavonoid concentration. The combination of microfiltration and ultrafiltration could produce a liquid fraction rich in flavonoids. However, the proposed combination of membranes and cleaning procedures are not optimal and needs further development.
| Originalsprog | Engelsk |
|---|---|
| Bogserie | Chemical engineering transactions |
| Vol/bind | 74 |
| Sider (fra-til) | 211-216 |
| ISSN | 1974-9791 |
| DOI | |
| Status | Udgivet - 31. maj 2019 |
| Begivenhed | 14th International Conference on Chemical and Process Engineering - RoyalCarlton Hotel, Via Montebello 8, Bologna, Italien Varighed: 26. maj 2019 → 29. maj 2019 Konferencens nummer: 14 http://www.aidic.it/icheap14/ |
Konference
| Konference | 14th International Conference on Chemical and Process Engineering |
|---|---|
| Nummer | 14 |
| Lokation | RoyalCarlton Hotel, Via Montebello 8 |
| Land | Italien |
| By | Bologna |
| Periode | 26/05/2019 → 29/05/2019 |
| Internetadresse |
Fingeraftryk
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Screw press extraction and ultrafiltration of flavonoids from kalanchoe leaves and stems. / Christensen, Knud Villy; Dyrkær Christiansen, Christian Emil ; Lund, Peter Brilner; El-Houri, Rime.
I: Chemical engineering transactions, Bind 74, 31.05.2019, s. 211-216.Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › peer review
TY - GEN
T1 - Screw press extraction and ultrafiltration of flavonoids from kalanchoe leaves and stems
AU - Christensen, Knud Villy
AU - Dyrkær Christiansen, Christian Emil
AU - Lund, Peter Brilner
AU - El-Houri, Rime
PY - 2019/5/31
Y1 - 2019/5/31
N2 - Kalanchoe leaves and stems contain flavonoids known to have anti-inflammatory, anti-microbial and anti-allergenic properties of interest for use in cosmetics and pharmaceuticals. The present study investigates the aqueous extraction of flavonoids from the leaves and stems of kalanchoe hybrids. The extraction process consisted of screw pressing followed by aqueous batch extraction, microfiltration using tubular 0.2 μm polypropylene membranes, 20 kDa polyethersulfone flat sheet membranes and 1 kDa composite fluoropolymer membranes. The experiments showed that the screw press efficiently separated the kalanchoe leaves and stems into a solid fraction with a dry matter content of 14 % and a liquid fraction with a dry matter content of 2.4 %. Approximately two thirds of the flavonoids were in the liquid phase after the initial pressing. The batch extraction time was found to be 3 hours to achieve maximum flavonoid concentration. The combination of microfiltration and ultrafiltration could produce a liquid fraction rich in flavonoids. However, the proposed combination of membranes and cleaning procedures are not optimal and needs further development.
AB - Kalanchoe leaves and stems contain flavonoids known to have anti-inflammatory, anti-microbial and anti-allergenic properties of interest for use in cosmetics and pharmaceuticals. The present study investigates the aqueous extraction of flavonoids from the leaves and stems of kalanchoe hybrids. The extraction process consisted of screw pressing followed by aqueous batch extraction, microfiltration using tubular 0.2 μm polypropylene membranes, 20 kDa polyethersulfone flat sheet membranes and 1 kDa composite fluoropolymer membranes. The experiments showed that the screw press efficiently separated the kalanchoe leaves and stems into a solid fraction with a dry matter content of 14 % and a liquid fraction with a dry matter content of 2.4 %. Approximately two thirds of the flavonoids were in the liquid phase after the initial pressing. The batch extraction time was found to be 3 hours to achieve maximum flavonoid concentration. The combination of microfiltration and ultrafiltration could produce a liquid fraction rich in flavonoids. However, the proposed combination of membranes and cleaning procedures are not optimal and needs further development.
U2 - 10.3303/CET1974036
DO - 10.3303/CET1974036
M3 - Conference article
VL - 74
SP - 211
EP - 216
JO - Chemical engineering transactions
JF - Chemical engineering transactions
SN - 1974-9791
ER -